This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of niobium bars. This standard applies to niobium round bars and square bars produced by extrusion, forging and rolling of ingots or powder metallurgy billets. GB/T 14842-1993 Niobium bars GB/T14842-1993 standard download decompression password: www.bzxz.net

UC 669.793 : 569. 882-172
National Standard of the People's Republic of China
GB/T 14842-93
1993-12-24 Issued
Niohium rods and hars
State Bureau of Technical Supervision
1994-09-01 Implementation
National Standard of the People's Republic of China
Ninbium rods and hars
Subjective requirements and applicable specifications
G/T141842-93
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation of rectangular materials. This standard applies to mixed round and square samples produced by extrusion, molding, rolling and other processes of ingots or powdered bars. 2 Reference standards
G228 Metal drawing test method
GB63: Metal drawing test sample
3 Product classification
3.1 Brand, manufacturing method, shape, specification
The brand, manufacturing method, state and specification of the bar shall comply with the provisions of Table 1. Table 1
Lake pressure method
Reduce state
Lihailian ()
Ignition state (M>
Reducing state (R)
Annealing state (M)
Hot pressing state (R)
Annealing state (M)
Bo state ()
Dehydration state (M)
3. --E. E
>6. 5~ 10 ?
→-1E~·25
>25~40
>50--55
18~~35
>40~65
3. 0 --5. D
>5. Note: The maximum side length is not less than 25mm, the length is not more than 4000m2 (M>The length of the material can be supplied is not more than 9GOm.3.2 Marking:
Figure Hao recommended technology supervision bureau No. 1 93-13-24 approved 5x-~1 5G5
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3~-1 -
200--220
2nn~-3 olm
200--2000
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1994-09-01 implementation
GE/T14842-93
The one made of Nh1, extruded state, with a diameter of 3Dmm and a length of 500mm is marked as #1R30X5CCGHT11342-93
The one made of Nb1, fire-proof state, 1emm, and a length of nm is marked as a polished round orange: Nb1M10×700GB/T4842~-53
The one made of Nil, annealed state, with a side length of 28mm and a length of 500mm is marked as: Nb:M2:×25X500GB/T14812 93
Made of Nb1, annealed, with a diameter of 6 mm and a length of 00 mm, the rolling sample is marked as: rolling FMh1M5×900B/T14542—92
4 Technical requirements
4.1 Chemical composition
4.1.1 The chemical composition of the finished product shall comply with the specifications in Table 2. Table 2
4.1.2 The content of barrier elements ().C, HN> in the finished product shall comply with the specifications in Table 3. When the requirements are met and specified in the contract, the content of barrier elements ().C, HN> in the finished product shall comply with the requirements in Table 3. Table 3
4.2 Size allowable deviation
4.2.1 The size of the sample shall comply with the provisions in Table 4. 2
The content of argon atoms, K
shall not exceedwwW.bzxz.Net
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-16--·13
:13--15
1>18 - 35
>25 --2c
+o- t5
GD/T14B42—93
迎长许保
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- 1- t
存: Reward ticket point machine seeks the side length of the square list, allows the bias control to be agreed by the supply and demand, +, d3
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506~1509
0--1 500
70G--1200
3:0--1200
2:x.~9 06
13G~-5 26?
13e1 s
Permissible deviation of fixed length t
4.2.2 The length of the sample of fixed length should be within the length of the sample of unfixed length. The length of the sample should be included in the cut when the cut is exceeded. Each cut is m. 4.2.3 The material should be flat. For the material with a true diameter less than 25mm, the deformation should not be greater than 3mm/r: For the material with a true diameter not less than 25mm, the curvature should not be greater than T5um/m.
24 The length of the joint material should not be flat. The straight diameter should be 4.2.5 The material should be cut and the end should be cut flat. When the vertical side length is not more than 35mm, the cutting bevel should not be more than 3mm. For samples with a diameter of not more than 1mm or a length of 5mm, the penalty bevel should not be more than 5mm. 4.3J Mechanical Properties
For materials with a diameter of not more than 1mm, the room temperature mechanical properties after annealing should conform to the provisions of Table 5. For materials with a diameter of or a length of more than 18mm, when required and specified in the contract, the supplier shall provide the measured data of the longitudinal and room temperature mechanical properties. Table 5
Tensile strength
No less than
4.4 Surface quality
OR/T14842-93
4.1 After pickling, the surface of the material is clean, without residual lubricant, oxide and its desorption. 4.4.2 The surface of the bar is allowed to have extrusion grooves, pits, joints and marks with a depth not exceeding half of the direct sales tolerance. 1 It is allowed to have slight end rotation stripes formed during correction and slight forehead marks formed by forging. It is allowed to clean the surface, but the cleaning depth shall not exceed the diameter tolerance.
5 Test method
5. The chemical composition of the material shall be analyzed according to the national standard aluminum, and the condensation analysis method shall be selected. 5.2 The size of the mold material shall be measured by the cabinet. 5.3 The materials are placed on the platform, and the curvature of the materials is checked with a ruler. 5.4 The performance test of the room distance is carried out according to GB22. 5.5 The new tail and surface quality of the whole materials are checked daily. 6 Inspection rules
6.1 Acceptance and acceptance
61.1 The materials should be inspected by the technical supervision department of the supplier to ensure that the product quality meets the requirements of this standard, and the certificate should be issued. 6.12 The received products should be inspected. If the inspection results are inconsistent with the requirements of this standard, the supplier should report to the supplier within 3 months from the date of receipt of the product. The supply and demand parties should negotiate to solve the problem. 6.2 The materials should be inspected in batches: each batch has the same bullet number, ingot number or static micro-strip number, specification, manufacturing method and state. 6.3 Inspection
Each batch of grid seats should be inspected for external dimensions, tail shrinkage and surface quality. The material with a diameter not exceeding 18mm should be tested for mechanical properties at room temperature.
6.4: Sample location and sample number
6.4.1 The chemical composition of the sample is the chemical composition of the ingot or bar: the content of the discontinuous element of the finished material is determined by taking one sample from each batch for analysis.
6.4.2 For the room temperature mechanical property test, take one sample from any finished product in the batch, and process it into GBt39? R6 to RB sample after quenching for test.
6.4.3 The material should be inspected for shrinkage. 6.4.1 The quality inspection results are selected one by one. 6.5 Repeated test
If the results of chemical composition analysis and mechanical properties test are unqualified, double test samples are taken from the batch for re-testing of unqualified items. If there is still one unqualified result, the whole batch is repeated. Mechanical properties can be tested, and the new batch acceptance: when the tail inspection is passed, it is allowed to cut off the extra part before acceptance. ? Marking, packaging, transportation, purchase and storage
7.7 Marking
7.7.1 The product should have a signature mark. There is a label or sign on each packaging box, indicating: 8
Product name:
5Product brand status and specifications:
Product batch and protection number.
7.7.2 Mark "moisture-proof" and "handle with care" or other words or signs. 7. 2 Packaging, transportation, purchase and storage
0B/T14B4293
.2.1 The samples are packed in boxes with moisture-proof paper inside. The samples should be neatly placed in the boxes, with each layer separated by red and the outer layer sealed with plastic film. To prevent the samples from moving in the boxes, the empty parts should be tightly sealed. 7.2.2 During transportation and storage, the bars should be protected from corrosion by silicon, condensation and active chemical reagents. 7.3 Quality certificate number
Special samples should be accompanied by a quality certificate, indicating: a.
Supplier name:
Product name:
Product brand, shape and specification:
Product number, batch number, number of pieces and roots, results of various tests and stamp of the inspection department; This standard number:
Packing date.
Additional instructions:
This standard is issued by China Nonferrous Metals Industry Corporation. This standard is difficult to be initiated by Baoji colored screen processing advertising responsible for the drafting of this standard Dingchun, Zeng Qi, Zhang Yansheng:
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