JB/T 9209-1999 Technical requirements for chemical heat treatment penetrants
Some standard content:
ICS25.200
People's Republic of China Machinery Industry Standard JB/T9209--1999
Chemical heat treatment penetrant
Technical conditions
Technical requirement of medium for thermo-chemical treatment1999-06-24 Issued
National Machinery Industry Bureau
2000-01-01 Implementation
1B/T9209-1999
This standard is a revision of ZBJ36014-89 "Chemical Heat Treatment Testing Technology System". Compared with the original standard, zinc powder is added to the three commonly used agents in Appendix A. Lead oxide and mixed rare earth are modified in accordance with relevant regulations.
This standard Since the implementation of H generation 2BJ36014-89. Appendix A of the technical standard is the appendix of the standard
This standard is moved out and centralized by the National Technical Committee for Standardization of Heat Treatment. The drafting unit of this standard is: Wuhan Institute of Material Protection, and the person in charge of this standard is: Chao Zhensheng.
This standard was first issued on March 21, 2001. Machinery Industry Standard of the People's Republic of China
Technical Conditions for Chemical Heat Treatment Penetrants
Jeshnisnlrsuuireeeat ■Scope
The standard specifies the technical requirements, safety requirements and test methods of chemical heat treatment JB/T 9209—1999
Replacement ZB J36
This standard applies to carbon steel, alloys, castings and other metal materials and powder metallurgy products for chemical heat treatment.
2 Referenced standards
The following standards contain the following items, which are quoted in this document as the provisions of this standard. When this standard is published, the versions shown are valid. All standards will be revised. The parties using this standard should consider the possibility of using the latest versions of the following standards: GR 21 (—1992
GB2531989
GB/T 470—1997
GB 536—19B
GD/T $37-1997
GB/T 6781990
G68—13
GB/1 6841986
GB/T 686J989
GB/T690J992
GR/T119—1993
GBT1614—1989|| tt||GB/T2085—19B9
GB 2440---1991bzxZ.net
GB/T29461992
GB3095—1996
GB 3551—[983
GB.T3634—195
GB/3864—156
GB/T4153—1953
GB.T 4842—1995
GB.768H—1986
Sodium carbonate
Non-water
1 Sodium tetraborate
Chemical reagent ethanol (anhydrous ethanol)
Chemical reagent methanol
Chemical reagent
Chemical reagent benzene
Lead ingot for remelting
Industrial Deficiency Plan
Flammable Aluminium Powder
Ammonium Nitride
Ambient Air Quality Standards
Stone Refining Industrial Water Pollutant Emission StandardsT Industry Hydrogen
Industrial State
Combined Rare Earth Metals
Approved by the State Machinery Industry Bureau on 1-06-24
2000-01-01Implementation
GB/T 9450-1988
GB/T 11354—1989
JB/T3999—1999
：JB/T42151996
[BT4218—1994
JB/T 9[98.-1999
JE/T 9203-1999
JBT9209—1999
Determination and verification of the depth of the nitride layer in steel partsDetermination of the depth of the nitride layer and the inspection of the relevant structureInfiltration and carbonitriding of steel parts
Determination of the depth of the nitride layer in steel parts ... t||3.1 Chemical heat treatment
The heat treatment process of placing the metal or alloy in an active medium at a certain temperature to keep it warm, so that one or more elements are introduced into its surface layer to change its chemical composition, structure and performance. 3.2 Chemical heat treatment filter
The medium that makes the surface layer of the metal workpiece drop to the required element under specific conditions. 3.3 Active substance
The substance that makes the agent produce the required active atoms at the chemical heat treatment temperature. 3.4 Cleaner
The substance that cleans and optimizes the surface blood of the metal workpiece and the surface blood of the penetrant to promote the chemical heat treatment process. 3.5 Bulk specific volume
The volume of the stabilizer per unit mass is the bulk specific volume. It is generally used to characterize the properties of the stabilizer and is expressed in cm. 3.6 Compression ratio
It indicates the ability of the medium to bear load. Under a certain load, the ratio of the broken part of the medium to the whole mass is called compression ratio, which is expressed as a white fraction.
4 Classification of penetrants
4.1 According to the chemical heat treatment, the main physical state is divided into three categories: gas penetrants, liquid penetrants and solid penetrants. The sub-classification is as follows. 4.1.1 Gas penetrants
) Liquid organic compound cracking gas penetrants:
6) Raw gas penetrants,
4.1.2 Solid penetrants
! Molten salt penetrants
b) Thermal penetrants
4.1.3 Solid penetrants
) Sodium sulfate solvents:
b) Calcium carbonate penetrants:
) High volume rolling penetrants.
4.2 According to the name of the material, it is classified into [B/T9209—1999]: carbonizing agent, degassing agent, double-rod agent, original carbon co-explosion agent, hidden sulfur agent, flow nitrogen co-repair agent, combed carbon co-penetration agent, boron agent, aluminum agent, chromium-avoiding agent, zinc agent, siliconizing agent, bonding agent, titanium diagnosis agent, chromium phase bonding agent, aluminum co-penetration agent, chromium aluminum silicon co-painting agent and coral love platform ling agent,
4.3 According to the number of components in the material, it is classified into a) unit cost agent: b) binary co-rate agent: c) guest co-painting agent, etc.
5 Technical requirements for paint
S.1 Chemical properties
When selecting paint for production, the following key points should be noted: 1) The paint should be stable and easy to decompose. The paint should be free of harmful impurities and ammonium compounds; 2) The paint should be stable and easy to decompose. The chemical composition of various commonly used paints can be found in Appendix A (Appendix to the standard). 5.2 Physical properties
5.7.1 Gas penetrant
Gas-based paints such as propane, butane, ammonia and nitrogen are generally bottled products. The gas in the bottle is decompressed and used for one month after operation. The pressure should be constant, the gas speed should be adjustable, and under strong forward circulation conditions, the mixed gas should have no component segregation. 5.2.2 Penetrants
The preparation temperature of liquid penetrants should be 50-100% lower than the use temperature. The penetrant is not easy to age, is easy to dry, has good fluidity within the use range, is small in viscosity, has little emission, and
5.2.3 Solid penetrants are generally required to have good durability and maintain stability after use: For solid penetrants, they are required to be easy to use, not crack after being applied to metal parts for 1,000 years, and be easy to remove after chemical heat treatment. 5.2.3.1 Particle size
The size depends on the performance of the adhesive, process requirements, shape and size of the parts. The general solid penetrant particle size is 0.5-60mm; the particle size of powder detergents and powder detergents is 2-200mm; the particle size of granular and granular penetrants is 16-100mm. 5.2.3.2 The bulk specific volume
should meet the requirements of T. The bulk specific volume of the granular agent is 0.9~1.4cmt/No.: 5.2.3.3 The filling rate
requires that the filling rate of the granular agent is small, usually less than [%5.3 Performance in Use
Different paints are used in the corresponding chemical heat treatment process to achieve the specified degree of penetration, organization, surface hardness or cabin grade.
6 Safety Requirements
JB/T9209-1999
No, under the conditions of the band, the production and use of the penetrant should take corresponding protection measures, and should not have adverse effects or cause harm to the human body. 6.1 When using gas penetrants, the gas in the heating must be burned, absorbed or neutralized, and the gas content must meet the requirements of GB 309 before it can be discharged.
6.3 Flammable and explosive gas cylinders are strictly prohibited from fireworks, and should be equipped with sufficient carbon dioxide and tetrachloride splash extinguishing materials: Heating equipment using flammable gases must be equipped with anti-splashing equipment.
6.4 It is strictly forbidden to use cyanide and other highly toxic raw materials in the production of salts and other substances. Toxic reaction products in the process must be treated with oxygen. The cleaning medium or the selected pyrolysis medium must also be disinfected. It can be discharged after meeting the requirements of GB3551. The emission of oxides is not allowed to exceed 0.5mg/L (0.5×10)
6.5 The operation room where solid surfactants are produced and used shall be equipped with exhaust ventilation equipment to reduce dust. The dust content in the air shall meet the requirements of GB3U95. The maximum concentration of smoke such as salt, shavings and dust is not more than 0.5mg/m6.6. To prevent salt, shavings and waste oil from polluting the environment, the "three stages" shall be collected, neutralized or released in accordance with the relevant regulations of the national health supervision agency.
1 Test method and acceptance rules
7.1 The bulk specific volume of the stabilizer shall be measured according to the provisions of JB4215. 7.2 The pressure flow rate of the granular agent shall be measured by the constant force method
Weigh the agent weight 9=30g, put it into a penetrating device with a penetration area of 12.5cm* [as shown in Figure 1, load it to P4900Y, retain > load, and let enough agent out. After the agent is sieved through the specified monthly sieve, weigh the agent weight again: According to the table, the non-infiltration rate is calculated according to the formula [1): t=silver=silver2× 100%
Figure 1 Pressure test device
7.3 Effectiveness test of the agent
Quality assessment of the penetrant, after the correct implementation of the process, check the surface quality of the penetrant, the depth of the penetration layer, elasticity and organization of the penetrant parts according to the standard
.3. Visual inspection
Requires that the surface color of the painted parts is normal, the grooves are clear, there is no cracking, no peeling, and no corrosion and other embedded spots. 7. 3, 2 Surface hardness
3B/T9209—1999
According to the process and type or the depth and hardness value of the joint layer, select the appropriate test force or the supply and demand sides to agree, the surface hardness value should meet the requirements of JB/T3999, JB/T4215 and JB/T4218. 7.3.3 The depth of the penetration layer
The penetration depth should be measured according to the inspection method of the layer, and the penetration depth should meet the requirements of the process. 7.3.4 The hardening depth
Measure according to the provisions of GD/T9450,
7.3.5 The structure of the enterprise
The structure of the mold should meet the requirements of the parts. 7.3.6 Loose layer
The looseness in the compound layer should be measured according to the provisions of GB 1354, and the general T. parts are qualified for 13 grades, and the precision T. parts are qualified for 1.-2 grades. 7.3. 7 Cross-layer cellular properties
According to GBT11354 standard, general workpieces are qualified for 1-3 levels, and precision workpieces are qualified for 1-2 levels. 4 Inspection reagents should be produced; the product quality inspection department shall inspect its chemical properties and physical properties according to this standard [or relevant standards]. The product certificate can be issued only if it meets the requirements. 8 Packaging, transportation, storage
8.1 The reagent product should be accompanied by a quality product certificate, including: product name, manufacturer name, batch number, product quality index or standard number, inspection department inspection chapter, inspection date, etc. 8.2 The packaging of the reagent should ensure moisture-proof, safety and portable, with a validity period of 1 year. 8.3 The packaging of solid filter agents is divided into five types: 1, 5, 10, 25, 50 kg: Gas raw materials should be in the steel cylinders (steps) that have passed the inspection according to the gas cylinder delivery regulations.
B.4 The packaging of filter agents should have firm marks, including: manufacturer name, product name and model, grade, net weight, batch number, production and export date, expiration date, etc.
There are special marks for the mixed filter.
5 Transport and storage should be kept away from rain and moisture. Reliable flame retardant and explosion-proof measures should be taken for flammable and explosive materials. 1B/F9209-1999
Appendix
(Appendix of standard)
Chemical composition and characteristics of several commonly used filter agents 41 Table A1 Chemical composition and characteristics of several commonly used paints. Table of contents: Chemical composition and characteristics of three commonly used chemical agents: Correct name: Safety ingredients: Butane (dibutane) 90% (volume) Alkane or 3% (volume) More than 2% (volume tax) E0.2g/m, anhydrous: Main name: kerosene for furnace and aromatic wax!
The total amount is 2%, pure tri-4%, main chemical acid or essential acid, containing 0.04% chain product, 7% aromatic hydrocarbons, a small amount of flat product, 50.5% water, 0.03% solids, 98.5% alcohol. 0.03% product, 0.001% pure product, 9.5% water.7 Cross-layer cellular properties
According to GBT11354 standard, general workpieces are qualified for 1-3 levels, and precision workpieces are qualified for 1-2 levels. 4 Inspection reagents should be produced; the product quality inspection department shall inspect its chemical properties and physical properties according to this standard [or relevant standards]. The product certificate can be issued only if it meets the requirements. 8 Packaging, transportation, storage
8.1 The reagent product should be accompanied by a quality product certificate, including: product name, manufacturer name, batch number, product quality index or standard number, inspection department inspection chapter, inspection date, etc. 8.2 The packaging of the reagent should ensure moisture-proof, safety and portable, with a validity period of 1 year. 8.3 The packaging of solid filter agents is divided into five types: 1, 5, 10, 25, 50 kg: Gas raw materials should be in the steel cylinders (steps) that have passed the inspection according to the gas cylinder delivery regulations.
B.4 The packaging of filter agents should have firm marks, including: manufacturer name, product name and model, grade, net weight, batch number, production and export date, expiration date, etc.
There are special marks for the mixed filter.
5 Transport and storage should be kept away from rain and moisture. Reliable flame retardant and explosion-proof measures should be taken for flammable and explosive materials. 1B/F9209-1999
Appendix
(Appendix of standard)
Chemical composition and characteristics of several commonly used filter agents 41 Table A1 Chemical composition and characteristics of several commonly used paints. Table of contents: Chemical composition and characteristics of three commonly used chemical agents: Correct name: Safety ingredients: Butane (dibutane) 90% (volume) Alkane or 3% (volume) More than 2% (volume tax) E0.2g/m, anhydrous: Main name: kerosene for furnace and aromatic wax!
The total amount is 2%, pure tri-4%, main chemical acid or essential acid, containing 0.04% chain product, 7% aromatic hydrocarbons, a small amount of flat product, 50.5% water, 0.03% solids, 98.5% alcohol. 0.03% product, 0.001% pure product, 9.5% water.7 Cross-layer cellular properties
According to GBT11354 standard, general workpieces are qualified for 1-3 levels, and precision workpieces are qualified for 1-2 levels. 4 Inspection reagents should be produced; the product quality inspection department shall inspect its chemical properties and physical properties according to this standard [or relevant standards]. The product certificate can be issued only if it meets the requirements. 8 Packaging, transportation, storage
8.1 The reagent product should be accompanied by a quality product certificate, including: product name, manufacturer name, batch number, product quality index or standard number, inspection department inspection chapter, inspection date, etc. 8.2 The packaging of the reagent should ensure moisture-proof, safety and portable, with a validity period of 1 year. 8.3 The packaging of solid filter agents is divided into five types: 1, 5, 10, 25, 50 kg: Gas raw materials should be in the steel cylinders (steps) that have passed the inspection according to the gas cylinder delivery regulations.
B.4 The packaging of filter agents should have firm marks, including: manufacturer name, product name and model, grade, net weight, batch number, production and export date, expiration date, etc.
There are special marks for the mixed filter.
5 Transport and storage should be kept away from rain and moisture. Reliable flame retardant and explosion-proof measures should be taken for flammable and explosive materials. 1B/F9209-1999
Appendix
(Appendix of standard)
Chemical composition and characteristics of several commonly used filter agents 41 Table A1 Chemical composition and characteristics of several commonly used paints. Table of contents: Chemical composition and characteristics of three commonly used chemical agents: Correct name: Safety ingredients: Butane (dibutane) 90% (volume) Alkane or 3% (volume) More than 2% (volume tax) E0.2g/m, anhydrous: Main name: kerosene for furnace and aromatic wax!
The total amount is 2%, pure tri-4%, main chemical acid or essential acid, containing 0.04% chain product, 7% aromatic hydrocarbons, a small amount of flat product, 50.5% water, 0.03% solids, 98.5% alcohol. 0.03% product, 0.001% pure product, 9.5% water.
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