GB/T 14993-1994 High temperature alloy hot rolled bars for rotating parts
Some standard content:
National Standard of the People's Republic of China
Hot-rolled heat-resisting superalloy bars for rotating parts
GB/T 14993-94
Replaces GBn176*-82
This standard applies to hot-rolled bars of nickel-based and iron-based high-temperature alloys with a service temperature of 7(0~900C (hereinafter referred to as sample materials). It can be used to manufacture high-temperature rotating load-bearing parts such as turbine blades for aviation, aerospace, gas turbines and other industries. 1 Dimensions and appearance
1.1 Dimensions and allowable deviations
1.1.1 Normally supplied hot-rolled round bars with a diameter of 20~55mm shall comply with the provisions of Table 1. Table 1
Alloy grades
GH 2130 (GII 130)
GH 2302 (GII 302)
GII 4033 (GH 33)
GH 4037 (GH 37)
GH 4043 (GH 43)
CH 4049 (GH 49)
20 ~ 32
33 ~44
45 ~55
1.1.2 According to the requirements of the purchaser, hot-rolled round materials and other profiles with diameters less than 20mm and greater than 55mm can be supplied. The specific dimensions and their allowable deviations shall be determined by negotiation between the supply and the end parties and shall be indicated in the contract. 1.1.3 The usual length of bars is 1.5~5m, but the length of bars with a diameter greater than 45mm is 1~4m. For short-length materials greater than 1.5m, the supply is allowed to be no more than 1% of the weight of the batch. If the purchaser requires delivery of parts in multiple lengths, the rough dimensions of the parts shall be indicated in the contract. 1.2 Appearance
1.2.1 The out-of-roundness of hot-rolled round steel shall not exceed 70% of the diameter tolerance. 1.2.2 The curvature of the selected steel shall not exceed 6 mm per meter. 2 Technical requirements
2.1 Grade and chemical composition
2.1.1 The grade and chemical composition (melting analysis) of the alloy shall comply with the provisions of Table 2 and 2.1.1.1~2.1.1.2. Approved by the State Administration of Technical Supervision on April 4, 1994 and implemented on May 1, 1994
New Processing No.
GH 2130
GH 2302
GH-m33
GI1 4037
GH 4043
GH 4049
Sintering brand
GH 131
GH 302
GEI 49
GB/T 14993—94
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GB/T 14993—94
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2.1.1.1 For GH4033, GH 4037, GH 4043, GH4049 alloys used for aviation and aerospace, the trace impurities are specified as follows: Bi0.001%, Stn0.0012%, Sbs0.0025%, As0.0025%, Pb0.001%. The supplier shall report the actual test results for Bi of GH 4037 and GH4049 alloys, and the cumulative data for Bi, St, Sb, A5, Ph of GH 2130 and GH2302 alloys. 2.1.1.2 When the upper limit of Ti content of GH4033 alloy is not more than 2.9%, it can be delivered after the buyer's approval. Except for aerospace and aviation, it can be delivered when the Fe content is not more than 4%.
2.1.2 According to the special requirements of the buyer and the agreement between the supplier and the buyer, the alloy with a stricter composition range than that specified in Table 2 can be supplied. Trace impurity elements such as Bi, Sn, Sb, Pb, As can be more strictly specified. 2.1.3 Permissible deviation of chemical composition of finished product
When the finished product is chemically analyzed (when the buyer inspects or the buyer requires the supplier to inspect the chemical composition of the finished bar), the chemical composition is allowed to deviate from the provisions of Table 2 with the consent of the buyer, and the maximum permissible deviation value shall comply with the provisions of Table 4 in GB/T 14992 "High Temperature Alloy Grades".
2.2 Refining method
The alloy shall be produced by the smelting method approved by the competent authorities of both the supply and demand sides. Other refining methods that meet the requirements of this standard may also be used after consultation between the supply and demand sides, and this shall be noted in the quality certificate and. 2.3 Delivery status
The bars shall be delivered without heat treatment, and their surfaces shall be fully ground. 2.4 Mechanical properties
2.4.1 The high temperature mechanical properties and room temperature hardness of the bars shall be determined by the heat-treated specimens. The high temperature mechanical properties and room temperature hardness requirements of the alloy, as well as the heat treatment system of the specimens shall comply with the provisions of Table 3 and 2,4.1.1~2.4.1.2. 14993—94
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GB/T 1499394
2.4.1.1 (H4033 alloy durability is 6 hours to make a conclusion; the supplier should take one of the samples and continue to pull it to break, but not more than j hours, and each furnace should be pulled to break, and the actual elongation and cross-sectional shrinkage are pregnant. 2.4.1.2GH4049 alloy is allowed to be air-cooled at 950-10℃ for 2 hours. At this time, the hardness value (positive mark diameter) should be 3.30~3.60mm, and its 900℃ strength should be not less than 55kgl/mm, and the others remain unchanged. 2.4.2 The performance of the material with a diameter of less than j-20mm or greater than 55mm shall be resolved by negotiation between the two parties, and the sheet shall be supplemented in the joint direction. 2.5 Low times Organization
2.5.1 When inspecting the macrostructure on the horizontal test specimen after acid treatment, the bar shall not have shrinkage marks, cavities, double lines, pinholes and impurities visible to the naked eye.
2.5.2 When inspecting the macrostructure on the longitudinal test specimen after heat treatment, the test results shall meet the requirements of GL 14999 "Test Methods and Rating Atlas of Macrostructure and Macrostructure of High-temperature Alloys". 2.5.3 When inspecting the fracture structure on the longitudinal test specimen after heat treatment, delamination and fracture looseness are not allowed. CH2130, (GH2302 alloy is qualified for 1 to 4 levels, C114033 alloy is qualified for 1 to 3 levels, and 4 levels are allowed for delivery, but both the supply and demand halls should be marked with GH 4(137, GII4043, GH4049 alloys are qualified for grades 1~3. 2.6 Macrostructure
2.6.1 Determine the grain size and uniformity of GH1033 alloy on the heat-treated specimen along the fiber direction. The grain size should be in the range of 0~4, and no less than 15% of the negative first-grade grains are allowed. GII1033 alloy allows the existence of banded structure, but it should meet the following requirements: the rod with a diameter of not more than 32mm is not more than 2 grades, and the rod with a diameter of more than 32m is not more than 3 grades. m material is not larger than grade 5.
2.6.2 According to the special requirements of the purchaser, after negotiation between the supply and demand parties. Other microstructures, non-metallic inclusions, etc. can be inspected. The inspection methods and requirements shall be specified in the contract or agreement.
2.1 Ultrasonic flaw detection inspection
The materials shall be inspected by ultrasonic flaw detection root by root. The inspection methods and technical requirements shall be determined by negotiation between the supply and demand parties. 2.8 Surface quality
The surface of the painted material shall not have cracks, folds, knots, cracks and disasters. Local defects on the surface of the material shall be removed. The allowable cleaning depth shall not exceed half of the tolerance of the size from the actual size, and individual slight scratches with a depth not exceeding 1/4 of the size tolerance are allowed. 3 Inspection method
8.1 Dimension measurement method
The material shall be inspected root by root using universal calipers, micrometers, steel tape measures and other measuring tools. 3.2 Appearance measurement method
3.2.1 Out-of-roundness measurement method:
On a circular material, cross-section the material and measure the difference between the maximum and minimum diameters of the cross section using a universal measuring disc tool. 3.2.2 Method for measuring curvature;
Along the length of the material, use a 1-meter ruler to measure α, and take the wave height between the ruler and the maximum curvature of the material. 3.3 Surface quality inspection method
The surface quality of the bars should be inspected by meat. 3.4 Chemical analysis method
3.4.1 The sampling method for chemical analysis of alloys shall be carried out in accordance with the relevant provisions of H222-63 "Steel Chemical Analysis Sample Sampling Method", and one sample shall be taken from each furnace. For alloys finally produced by electroslag or vacuum arc furnace, C, Al, and Ti should be sampled and analyzed from the head and tail of the ingot, and other specified elements should only be sampled and analyzed from the head of the ingot. 3.4.2 The chemical analysis of the joint venture can be carried out according to the general method, but the arbitration analysis shall be carried out according to YB790-75 (chemical analysis method for high temperature alloys). The arbitration method for chemical analysis of elements that are not specified or not applicable in YB790-75 shall be determined by negotiation between the supply and demand parties. 3.5 Low-power, high-power and mechanical properties test methods..com3.5.1
GB/T 14993—94
Low-power, high-power, mechanical properties The number of samples, the location and the test method for each batch shall comply with the provisions of Table 4. Table
Horizontal low-power image
Longitudinal low-power
Longitudinal fracture
Microstructure
High-temperature endurance
High-speed pull-off
Room temperature hardness
Grain size
Equivalent to one head and one tail of steel ingot
Head, one nicotine
Head, one nicotine
Head, one tail The purchaser shall have one head and one tail for the total purchase. The head and tail shall have one head and one tail for the total purchase. The tail shall have one head and one tail for the total purchase. ① The diameter of the bar shall not exceed 32mm, and the center line of the mechanical performance sample shall coincide with the center line of the fall. 2: The vertical diameter of the bar shall be greater than 32mm, and the center line of the mechanical performance sample shall be at 1;2 of the radius of the material. 3.5.2 When the purchaser retests, other commonly used methods may be used for high temperature endurance and high temperature tensile tests. 4 Inspection Rules 4.1 Acceptance CB/T 14999.2$4
GB/T 14999.1- 31www.bzxz.net
GB/T 14999.3 31
GB/T 14999.4 94
YB89877
YB941-78
GB 281-63
CH/T 1499. 4 --91
The acceptance of bars shall be carried out by the technical supervision department of the supplier: the purchaser has the right to inspect the bars according to the provisions of this standard. 4.2 The bars shall be inspected in batches, and each batch shall be made up of bars of the same brand, the same smelting furnace number, the same size, and the same processing method. The batch weight shall generally be greater than 10kg: the GH4037 alloy shall be greater than 150kg, the GH4033 alloy shall be greater than 200kg, and the G114049 alloy shall be greater than 60kg. If the user has other requirements for the batch, the supply and demand parties shall negotiate to resolve it and indicate it in the contract. 4.3 Re-inspection|| tt||4.3.1 When a test fails, double the number of samples should be cut from different bars (including the original test bars) for retest of the item (except for high temperature endurance test). If only one sample fails in the retest, the batch of bars should be scrapped. 4.3.2 When the bar fails due to the end hole, the supplier can cut the shrinkage hole clean and still inspect according to the initial test regulations. 4.3.3 When the initial high temperature endurance test fails, samples should be taken from the two bars of the original initial test and retested according to the indicators specified in the brackets of 3. If even one sample fails in the retest, the batch of bars should be reported. 4.3.4 The supplier can conduct the test of the item (except mechanical properties) for the batch of bars that failed the test one by one, and then re-batch and deliver, and it should be stated in the quality certificate. However, the re-batch is limited. 4.3.5 The supplier can roll the batch of bars that failed the retest into other sizes according to the actual situation, and then re-batch and submit for acceptance. 4.4 Quality objection
After receiving the materials from the supplier, the purchaser shall promptly inspect the materials in accordance with the provisions of this standard. If the materials are found to be non-compliant with the provisions of this standard during the inspection, the supplier shall immediately raise the issue to the supplier. When the supplier receives the quality objection from the purchaser, the office shall promptly cooperate with the purchaser to deal with it. 4.5 Arbitration test
GB/T14993-94
When the supply and demand parties disagree on the results of a certain test, an arbitration test shall be conducted by an arbitration unit agreed upon by both parties. The high-temperature tensile and high-temperature endurance test methods shall be determined by the arbitration unit. 4.6 Handling of metallurgical defects
When the purchaser finds metallurgical defects on finished products or semi-finished parts, and the defects are confirmed by both parties, the supplier shall return the goods and make up for them when the purchaser requests. If the supply and demand parties find it difficult to determine the nature of the defects, they may request arbitration by an arbitration unit designated by the superior department or agreed upon by both parties in order to reach a final conclusion. 5 Packaging, marking and quality certificate
6.1 The alloy grade, furnace batch number and serial number shall be marked on each bar. For bars with a diameter less than 26mm, codes are allowed and shall be indicated in the quality certificate. The position of the material equivalent to the head and tail of the ingot shall be marked with obvious symbols. 5.2 Each batch of samples supplied shall be accompanied by a quality certificate. The quality certificate shall include the supplier's name, the name of the carrier, the contract number, the standard number, the alloy grade, the smelting method, the furnace number (including the mother furnace number and the sub-furnace number), the specifications, the quantity, the weight, the date of shipment and the various inspection results specified in this standard, the agreement and the contract (if re-inspection is carried out, the results of two inspections shall be included), and the stamp of the technical supervision department shall be stamped. 5.3 In addition to the requirements specified in this standard, other requirements for packaging, marking and quality certificates shall comply with the requirements of GB2101-80 "General Provisions for Acceptance, Packaging, Marking and Quality Certificate of Section Steel". Additional Notes:
This standard is proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard was drafted by Fushun Steel Plant.
The main drafters of this standard are Fu Xiangdong and Yao Yongfeng. This standard is entrusted to the Standardization Research Institute of the Ministry of Metallurgical Industry for interpretation.2 groups of batches
The bars shall be inspected in batches, and each batch shall be made of bars of the same brand, the same smelting furnace number, the same size, and the same processing method. The batch weight shall generally be greater than 10kg: GH4037 alloy shall be greater than 150kg, GH4033 alloy shall be greater than 200kg, and G114049 alloy shall be greater than 60kg. If the user has other requirements for the batch, the supplier and the buyer shall negotiate and resolve it, and indicate it in the contract. 4.3 Re-inspection
4.3.1 When a test fails, double the number of samples shall be cut from different bars (including the original initial test sample) for re-inspection of the item (except for high temperature endurance test). Even if only one sample fails in the re-inspection result, the batch of bars shall be scrapped. 4.3.2 When the bar fails due to end holes, the supplier can cut the shrinkage hole clean and still inspect it according to the initial test regulations. 4.3.3 When the initial high temperature endurance test fails, the two bars of the original initial test shall be taken and retested according to the indicators specified in the brackets of Item 3. If even one of the retest results fails, the batch of bars shall be reported. 4.3.4 The supplier may conduct the test of this item (except mechanical properties) on the batch of bars that failed the test one by one, and then re-batch and deliver them, and shall state this in the quality certificate. However, the re-batch is limited. 4.3.5 The supplier may roll the batch of bars that failed the re-test into other sizes according to the actual situation, and then re-batch and submit for acceptance. 4.4 Quality objection
The purchaser shall inspect the materials in accordance with the provisions of this standard in a timely manner after receiving the materials from the supplier. If the materials are found to be non-compliant with the provisions of this standard during the inspection, they shall be immediately reported to the supplier. When the supplier receives the quality objection from the purchaser, it shall promptly cooperate with the purchaser to deal with it. 4.5 Arbitration test
GB/T14993-94
When the supplier and the buyer disagree on the results of a test, the arbitration test shall be conducted by an arbitration unit agreed by both parties. The high-temperature tensile and high-temperature endurance test methods shall be determined by the arbitration unit. 4.6 Handling of metallurgical defects
When the buyer finds metallurgical defects on finished products or semi-finished parts, and the defects are confirmed by both parties, the supplier shall return the goods and make up for them when the buyer requests. If the supplier and the buyer are unable to determine the nature of the defects, they may request arbitration by an arbitration unit designated by the superior department or agreed by both parties in order to reach a final conclusion. 5 Packaging, marking and quality certificate
6.1 The alloy grade, furnace batch number and serial number of the bars shall be marked one by one. For bars with a diameter of less than 26mm, it is allowed to be coded and indicated in the quality certificate. The position of the material equivalent to the head and tail of the ingot shall be clearly marked with symbols. 5.2 Each batch of supplied samples shall be accompanied by a quality certificate. The quality certificate shall include the supplier name, carrier name, contract number, standard number, alloy grade, smelting method, furnace number (including master furnace number and sub-furnace number), specifications, quantity, weight, delivery date and various inspection results specified in this standard, agreement and contract (if re-inspection is carried out, it shall include two inspection results), and shall be stamped with the seal of the technical supervision department. 5.3 In addition to the requirements specified in this standard, other requirements for packaging, marking and quality certificates shall comply with the requirements of GB2101-80 "General Provisions for Acceptance, Packaging, Marking and Quality Certificate of Steel Shapes". Additional Notes:
This standard was proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard was drafted by Fushun Steel Plant.
The main drafters of this standard are Fu Xiangdong and Yao Yongfeng. This standard is entrusted to the Standardization Research Institute of the Ministry of Metallurgical Industry for interpretation.2 groups of batches
The bars shall be inspected in batches, and each batch shall be made of bars of the same brand, the same smelting furnace number, the same size, and the same processing method. The batch weight shall generally be greater than 10kg: GH4037 alloy shall be greater than 150kg, GH4033 alloy shall be greater than 200kg, and G114049 alloy shall be greater than 60kg. If the user has other requirements for the batch, the supplier and the buyer shall negotiate and resolve it, and indicate it in the contract. 4.3 Re-inspection
4.3.1 When a test fails, double the number of samples shall be cut from different bars (including the original initial test sample) for re-inspection of the item (except for high temperature endurance test). Even if only one sample fails in the re-inspection result, the batch of bars shall be scrapped. 4.3.2 When the bar fails due to end holes, the supplier can cut the shrinkage hole clean and still inspect it according to the initial test regulations. 4.3.3 When the initial high temperature endurance test fails, the two bars of the original initial test shall be taken and retested according to the indicators specified in the brackets of Item 3. If even one of the retest results fails, the batch of bars shall be reported. 4.3.4 The supplier may conduct the test of this item (except mechanical properties) on the batch of bars that failed the test one by one, and then re-batch and deliver them, and shall state this in the quality certificate. However, the re-batch is limited. 4.3.5 The supplier may roll the batch of bars that failed the re-test into other sizes according to the actual situation, and then re-batch and submit for acceptance. 4.4 Quality objection
The purchaser shall inspect the materials in accordance with the provisions of this standard in a timely manner after receiving the materials from the supplier. If the materials are found to be non-compliant with the provisions of this standard during the inspection, they shall be immediately reported to the supplier. When the supplier receives the quality objection from the purchaser, it shall promptly cooperate with the purchaser to deal with it. 4.5 Arbitration test
GB/T14993-94
When the supplier and the buyer disagree on the results of a test, the arbitration test shall be conducted by an arbitration unit agreed by both parties. The high-temperature tensile and high-temperature endurance test methods shall be determined by the arbitration unit. 4.6 Handling of metallurgical defects
When the buyer finds metallurgical defects on finished products or semi-finished parts, and the defects are confirmed by both parties, the supplier shall return the goods and make up for them when the buyer requests. If the supplier and the buyer are unable to determine the nature of the defects, they may request arbitration by an arbitration unit designated by the superior department or agreed by both parties in order to reach a final conclusion. 5 Packaging, marking and quality certificate
6.1 The alloy grade, furnace batch number and serial number of the bars shall be marked one by one. For bars with a diameter of less than 26mm, it is allowed to be coded and indicated in the quality certificate. The position of the material equivalent to the head and tail of the ingot shall be clearly marked with symbols. 5.2 Each batch of supplied samples shall be accompanied by a quality certificate. The quality certificate shall include the supplier name, carrier name, contract number, standard number, alloy grade, smelting method, furnace number (including master furnace number and sub-furnace number), specifications, quantity, weight, delivery date and various test results specified in this standard, agreement and contract (if re-testing is carried out, it shall include two test results), and shall be stamped with the seal of the technical supervision department. 5.3 In addition to the requirements specified in this standard, other requirements for packaging, marking and quality certificates shall comply with the requirements of GB2101-80 "General Provisions for Acceptance, Packaging, Marking and Quality Certificate of Section Steel". Additional Notes:
This standard was proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard was drafted by Fushun Steel Plant.
The main drafters of this standard are Fu Xiangdong and Yao Yongfeng. This standard is entrusted to the Standardization Research Institute of the Ministry of Metallurgical Industry for interpretation.
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