Some standard content:
ICS 25. 200
Machinery Industry Standard of the People's Republic of China
JB/T10175—2000
Quality control requirement for heat treatment
Quality control requirement for heat treatment2000-03-30 Issued
Weijia Machinery Industry Bureau
2000-10-01 Implementation
JB/T10175-2UU0
This standard mainly refers to GIB509A-95 "Quality Control Requirements for Heat Treatment Process", and is formulated in combination with the actual situation of the machinery industry. In order to change the traditional heat treatment quality control situation that relies on inspection and passive control, the heat treatment quality control is mainly carried out in the early stage of the quality control period, and the quality control is mainly carried out in the final inspection. This is beneficial to the quality of the production and is in line with the international standards. This standard is proposed and approved by the National Heat Treatment Standardization Technical Committee. The drafting parties of this standard are: Beijing Institute of Aeronautical Materials, Beijing Institute of Mechanical and Electrical Engineering. The main drafters of this standard are: "Guangsheng, Jian Lanying, Fei Qiwan, Ye Xiaosi, Scope
Machinery Industry Standard of the People's Republic of China
Quality Control Requirements for Heat Treatment
Quality Coal Rheology Heat Treatment Quality Control JB/T10[75—2000
This standard specifies the basic requirements for quality control of personnel, operating environment, equipment and instruments, process materials, technology, technical documents and information during heat treatment
This standard is applicable to the compilation of heat treatment processes, quality control of production processes, and technical improvement planning and design. 2 Referenced standards
The provisions contained in the following standards constitute unwritten provisions by reference in this standard: When unwritten standards are eliminated, the versions shown are invalid and all authors will be accepted. All parties using this standard should discuss the possibility of using the following standards as the latest version. GB 209—:993
GH94501988
GB[0066.1-1988
GB-T1!354—1989
3R1573S—[993
JRTM90—1990
JD:T S072 199:
JD/T6049[992
[BT 6933-1993
JB:T 7530—1994
3B/［9202—1999
JBT 9204-1y95
3 Personnel
Use sodium chloride
Operational gas oxidation unloading
Determination of effective hardening depth of carbonization fire of parts and determination method of effective heating zone of shuttle mold heat treatment furnace
General part of inspection methods for electric heating equipment
Determination of tunnel depth of steel parts and metallographic crack inspection Enterprise thermal management production safety requirements High and medium temperature heat treatment salt road correction agent
Technical requirements for heat treatment protective materials
Determination of effective heating zone of heat treatment furnace
Technical requirements for commonly used mediums for heat treatment
New gas efficiency gas and gas control technology for heat treatment Treatment salt
Chemical treatment agent technical requirements
3.1 Heat treatment production, technical and inspection personnel must have a certain professional level, be familiar with their own business, and have certain practical experience. 3.2 Heat treatment operators, instrument operators and inspectors must be trained and assessed according to regulations, obtain qualification certificates, and hold certificates to work. 4 Working environment
4.1 The working environment of the treatment should meet the requirements of GB735. 4.2 The temperature change in the workshop is generally not less than 10, and the chemical analysis room and the test room should generally not be less than 13: Approved by the State Administration of Machinery Industry 20-03-3#
2000-1(H)T 4.3 The operation shall be carried out under good ventilation and dust removal conditions. The salt bath furnace, heating oil sugar and shot peening, other equipment such as spraying and other equipment shall be equipped with good ventilation and dust removal equipment. The workshop shall have good exhaust facilities, equipment and attenuation equipment. 5.1.1 The heating furnace shall be connected to the effective heating zone insulation accuracy (furnace temperature uniformity) requirements as shown in Table 1. The requirements for temperature control, instrument precision machine and paper scale are as shown in Table 1. Control degree
Accuracy of meter indication
Record low card (minute lift)
5.1.2 Each heating zone of the heating furnace shall be equipped with a thermoelectric and a recording instrument, which shall be placed in the effective heating zone and connected to the temperature control meter. One of the instruments shall have an alarm function: 5.1.3 Each heating furnace must be regularly inspected for the effective heating zone. The inspection cycle is shown in Table 2. The inspection method is in accordance with the provisions of B/9452 and B6049. The insulation accuracy shall meet the requirements of Table 1. A certificate of inspection with a schematic diagram of the effective heating zone shall be hung in a conspicuous position. The heating device can be used within the validity period specified in the certificate of inspection of the effective heating zone. Table 2 Heating effective heating zone cycle and instrument verification cycle Heat protection category
Effective heating zone cycle
Installation and inspection period:
On-site temperature measurement system. Under normal use, the system shall be checked regularly. During the test, the distance between the hot end of the thermocouple and the recorder shall be as close as possible. The test shall be carried out when the heating furnace is in a fixed state. The allowable temperature deviation of the system shall be as shown in Table 3. If the above allowable temperature deviation is found, the source shall be found out and eliminated or corrected: 5. The atmosphere in the furnace of the oxygen furnace and the chemical treatment furnace shall be controllable and regulated. The gas protection furnace shall not be allowed to be exposed to the heat. IU175-20U
Table 3 System verification allowable temperature deviation
5.1. For this carbon "carbon-containing carburizing, the same as above! Nitriding (nitrogen-containing carburizing, the same as above), in the effective hot zone test, the piece should also be tested for paint depth, the test support placement position is in accordance with the effective hot zone insulation accuracy detection thermocouple layout, the inspection method shall comply with the provisions of GD/T9450 and GB 11354. For this carburizing furnace, the slowing down layer depth deviation shall not exceed the provisions of Table 4 and 5. Table 4 Carbon protection hardening layer depth deviation requirements Purification method deep zone
There is a difference in the skin
Effective visual difference
>1.50-2 sn
Table 5 Nitrogen furnace effective hardening layer depth deviation requirements>0.1-02
> 2 5:
1. The porosity of the heat treatment furnace should not be greater than 1.33Pa. The pressure opening rate test period, in the case of continuous use, should be inspected after the equipment is repaired, after the sealing element is replaced, or before it is used again after a long period of non-use. The inspection method is in accordance with the provisions of GB/11444-1999: 5.1.8 The heating medium in the furnace may cause the heating working surface to produce decarburization, carbon increase, nitrogen increase and other phenomena exceeding the specified depth in the technical documents
5, 1.9 The heating furnace should have sufficient furnace temperature recovery ability, and the workpiece should be used for solution heat treatment. The recovery time must meet the requirements of Table 6. For parts with special requirements, the recovery time shall be implemented according to the technical documents. Table 6 Maximum heating time
Maximum day
5,1.10 Induction heat treatment power supply efficiency and power density must meet the heat treatment requirements, output power control within ±3%, or output power, stop within ±2.5%. Induction treatment machine tools and limiting devices meet the requirements of the working light. 5.1 Sudden fire
5.2.1 The speed of the fire increase should meet the requirements of the technical documents on the speed transfer time of the parts, 5.2.2 The volume type of the fire cover should meet the needs of continuous fire and the movement of the parts in the fire, 5.2.3 Backfire should generally be equipped with a cover, cover protection before stopping, and the oil cover should be cleaned regularly! . 5.2.4 During the fire process, the temperature should be maintained at 10-100℃, and the water temperature should be maintained at 10~0℃. The technical document also requires that when using a certain molten medium, according to the technical document, 5.7.5 The fire should be circulated without stirring and cooling. When using a circulation system, a mechanical stirring system or a jet convection device, etc., it is necessary to install a heating device. 5.2.6 The fire section should be equipped with a temperature measuring instrument with a sensitivity not greater than 5.3 Cleaning and cleaning equipment
5.3.! Cleaning and cleaning shall not produce harmful effects on heat-treated workpieces. The surface quality of the parts after cleaning and cleaning shall meet the requirements of the technical documents.
5.3.2 Various acids used for cleaning shall have clear identification marks and signs indicating the test results, specifications or prohibited words. 5.3.3 Equipment for cleaning steel and high-temperature alloy parts and removing protective coatings shall be used separately and cannot be mixed with equipment for cleaning titanium alloys, aluminum alloys and dense alloy parts.
5.3.4 Cleaning and cleaning equipment with tear sheet requirements shall be equipped with temperature measuring equipment (see Table 59). 5.3.5 The configuration and use of cleaning and cleaning equipment shall meet the technical safety requirements. 5.4 The level of temperature control and recording instruments used on site shall meet the requirements of Table 1, and the specified cycle shall be selected according to Table 2! 5. 4.
5.4.2 The standard potentiometer used for on-site system calibration shall have a screening degree of not less than 0.05 and a resolution of not less than 1V. The calibration cycle is 6 months. The mercury thermometer used for measuring shall meet Class I standards, with a resolution of 0.1℃ and a calibration cycle of [years]. 5.4.3
The technical requirements for thermocouples used on site are shown in the table. Technical requirements for thermocouples used on site
Standard specifications for thermocouples used on site
Light weight parts-11 thermoelectric valve
Drill 0 clamp
Energy 30-Energy 6
Dryness
Comprehensive cake-Zhang Xiao
Office number|| tt||2-digit allowable degree research environment and fee increase calibration shop
T standard non
one special standard full
fast use temperature
300--1300
41IEI--114KF
6M)--16u0
600-1709.
890-17(0)
4001100
-40-+350
200~+40
4n+800
·+9L10
fill the difference
+11+( + 103 1x(0.113]
± 1.0 or ±1.5%
= 1.5~ = 0.4%
2.5±0.75%
Control three-phase
JE/T10175—2000
5.4.5 Vacuum gauges, pressure gauges, flow monitors and carbon potential meters should be inspected regularly and qualified before use. 5.5 Inspection equipment and tools
5.5.1 Various observation meters, conductivity meters, weighing blocks and other measuring equipment and instruments should be inspected regularly. Without qualification certificates and 5.5.2 Before using, the hardness tester should be tested with standard type and its structure should meet the hardness indication value, and the original record should be tested regularly. 5.5.3 Metallographic inspection and mechanical and dynamic performance inspection should be completed and qualified. 6 Process materials The materials used in the processing should not have any harmful effect on the workpiece, and should meet the national standards, industry standards or special technical documents of the relevant products, see Table 8.
Table 8 Technical requirements for materials for children and recommended test items NamebzxZ.net
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate
Sodium nitrate 9209
JR:T9202
JB/E9202
JR/T9202
JBT9202
GBT 1919
JBT4390
JA/rH2
JBT9203
JBT920W2
2B/16955
Special technical documents
Chaos, request, double
Pool epidemic. Ice, extremely
pure spots, water, relatively
pure, water
Ya refers to the leading day
pure drink, H value: general acid silver: our acid hatred, water purity, clear value. General acid food. Chemical nitrogen and oxygen, water purity, anion value, sulfate, carbon monoxide, chloride ion purity. Broken salt, magnetic acidification, dynamic viscosity, wake-up, flash point moisture content, chest promotion "T-3 key piece:, cold printing parts JB/T10175-2Q00 6.21 The process material room has the original manufacturer's certificate or certificate. 6.3 The process materials must be re-tested before use. This qualified product is prohibited from use. Recommended safety inspection items table 8, T process 7.! The material of the workpiece to be processed should comply with the relevant material standards, and the workpiece material should be approved before heat treatment: 7.1 Sulfur should be reasonably selected according to the material of the workpiece, technical requirements and T process. 7.3 Add the remaining female small Ding 0.3 1 of the certified parts and the fixtures used, and remove oil, dirt and prints before entering the furnace. 7.4 The workpieces should be installed in a certain distance from each other in the effective heating zone, and the atmosphere between the cold cut and workpieces should be smooth. 7. The surface heat treatment of steel parts with excess content should not increase and increase nitrogen, and the denitrification layer (combined with the lower depletion layer) should not be deeper than the requirements of the relevant technical documents. 7.6 The increase in the content of nitrogen caused by heat treatment of the metal parts and reinforced steel parts should not exceed the requirements of the relevant technical standards. 7.7 The air-cooled parts should be shielded from the heat treatment to avoid adhesion and alloying of the surface of the parts due to expansion between the metal parts. The pilot wire should not be used. 7. The frequency of the protective gas during heat treatment should be controlled within the specification of the technical document and suitable for the parts. When using atmosphere, atmosphere protection gas is used for heat treatment, the dew point of hot furnace gas is lower than -2,9, nitriding, carbon-nitrogen co-stabilization, nitriding (nitrogen-carbon co-stabilization) and other chemical heat treatments, except for direct excavation of the source of ignition, the cooling grid is used, or the cooling is carried out under the protection of the gas to prevent oxidation during the cooling process. 7. The various flushing liquids in use should be regularly analyzed according to the requirements of Table 9. If the analysis results do not meet the requirements of Table 9, the cooling test should be carried out gradually. The cooling test should be carried out and the hydrogenation test should be carried out. Only qualified ones can be used. Those that are not qualified should be adjusted in time or faster. Technical requirements of Table 9 liquid
High salt
Greasy oil
Temperature kerosene
Technical fee
Acid 4.1%, pH 6.5-8.5
Make the acid = 0.1%. pH value 6.5-8.5. Carbonate = 0.05% Carbonate = 0.2%. % Need to be sensitive to 0.5%, total storage G.05% Carbonate 5.4%
Kinematic viscosity [4: [151-552] × 10~s] Flash point (open 11 not proved 1609:, water more than 0.05% turbidity! Steel sheet extrusion, cold addition characteristics
1" can be calculated by case 1 shot, heat growth can not exceed 6 months, continuous full week example can be proved to grow for a week, 2: This material alloy product heat plate limit agent chloride ion content, 1) and other low carbon root indicators will be considered. Not used as a basis for judgment. 2
.11 Code "material type, heat treatment requirements, reasonable selection of heating medium. Welded parts, castings: copper-plated parts, copper alloy parts! Skin powder metallurgy parts: a small amount of charge in the furnace: 8 documents and information
! According to the average material of the following parts, technical requirements for improvement, 1 cost and other conditions, formulate advanced and suitable heat treatment process 6
JET10175-20
8.2 Preparation 1 process selected parameters other teaching requirements, should comply with the relevant marking, design data rod technology 8.31 After the production of the technical documents, they must be checked, reviewed, countersigned, and approved. The relevant parts and more important technical documents must also be stamped or marked.
8.4 The key control content should be compiled into the technical procedures or formulated work instructions. 8.5 The modification of the technical documents must be approved. The important changes must be selected and verified by the technical verification. When necessary, the new technology should be tested and tested for performance and qualified results can be obtained before the modification. &.6 All technical documents and their change orders must be archived and kept safe. 8.Heat treatment quality: product characteristics, select reasonable shelf life, it is suitable for the narrow package: a) heating protection effective heating area moisture retention accuracy detection record: h) system calibration record;
filter layer uniformity record:
d! Regular analysis report;
e! Positive process performance test report!
installation ring 1 liter production record card and heat treatment temperature record paper; physical and chemical performance test report,
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