This standard specifies the basic requirements for base materials, equipment, infiltrating agents, metal infiltration processes and post-treatment, quality inspection of infiltration layers and safety technology for chromizing, aluminizing and zinc infiltration of iron-based and non-iron-based alloy workpieces in powder media. This standard is applicable to iron-based and non-iron-based alloy finished products or semi-finished workpieces to be polished that require surface wear resistance, corrosion resistance and oxidation resistance, but not to workpieces to be ground. JB/T 8418-1996 Powder infiltration JB/T8418-1996 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T 8418-9G
Powder not infiltrated with metal
Published on September 3, 1996
Ministry of Machinery Industry of the People's Republic of China
Implementation on July 1, 1997
JB/T8418-96
This standard is published for the first time and will be implemented from July 1, 1997. This standard is issued by the National Technical Committee for Standardization and is under the jurisdiction of the Wuhan Institute of Materials Protection, Ministry of Machinery Industry. The main drafter of the technical standard is Xie Yuxiong.
·Scope
Machinery Industry Standard of the People's Republic of China
Powder Metal
JBT 841896
This standard specifies the technology, design, and after-effects of the infiltration of ferrous and non-ferrous alloy workpieces in physical media such as chromium, aluminum and zinc. The infiltration process and after-effects, quality inspection of the infiltration layer and the requirements for safe infiltration. This standard is applicable to ferrous and non-ferrous products or semi-finished workpieces to be polished that need to change the surface to be wear-resistant, glazed and oxidation-resistant, and is not applicable to the above-mentioned items.
2 Referenced Standards
The texts contained in the underlined standards are the referenced texts of this standard. When this standard is published, the versions shown are valid and all specifications are subject to revision. Parties using this standard should use the latest version of the following standards to ensure the performance of the software. GBD7388
GB15735-1J05
J3R77-A
JH/506331
ZR JS C14-KS
3 Metal coatings and related layers Medical initial test Metal processing Safety and sanitation in production process Steel before fire treatment
Steel parts Metallurgical inspection methods Chemical treatment technology Case studies The following definitions are adopted in the standard,
1.1 After metallurgy
The workpiece is placed in a medium with a heating agent at an appropriate temperature and maintained for an appropriate time so that the metal elements diffuse and penetrate into the chemical layer.
3.2 Aggregate gold thickening agent
The powder medium composed of the agent, accelerator and filler that can produce active gold atoms 3. 3 Total depth of the layer
The distance from the surface of the matrix to the junction of the matrix, 4 Substratum matrix material
Material The required matrix material is shown in Table 1,
Metallic gold type
Approved by the Ministry of Machinery Industry on September 3, 1996
Sales, domestic alloys required, base alloys
Iron, steel, base alloys, sub-alloys, relatively large, steel alloys, etc., group, base powder treatment key and its combination, aluminum and sterling alloys, etc. 1997-07-01 test bottle
5 Equipment
JB/T8418-96
5.! Light dust should be treated with high temperature furnace, heavy dust should be treated with medium temperature furnace, and heavy dust should be treated with drum furnace with inclination or free temperature furnace with air supply. 5.2 Temperature control device should be equipped, and the temperature control accuracy should reach ±1°C! 5.3 The temperature uniformity of the effective hot zone of the induction furnace should be 110°C. 5.4 The filter box (filter box) should be made of hot steel. The filter can pass the protective gas. 6. The technical requirements of the infiltration agent
are in accordance with the relevant provisions of ZBJ36014. Replacement of the agent group or see 2. 2
Agent type
Personalized pants
Filling agent
Decomposition
Deepening agent
Accounting for engraving
Filling agent
Process and post-processing
1.1 Preliminary precautions
Wrong transfer price <or make up>
Meat flower Germany
Oxidizing powder
Initial missing format (reduced powder)
Prohibited chemical teaching, this battle chemical series
The first chemical powder
Jiabei dumplings
Determine the process number according to the requirements of the drawing.
Technical requirements
Contains 1.1% ta, the majority is e. Particle size
Pulling degree 1u0~2Uu, French imported wheel brain water
Contains 4140%--70--150--200 mesh
Particle size 150~200 mesh needs to be high-temperature fired water
Speed ​​60-·120
Speed ​​50-=80 months, high quality wake-up frequency 2
7.1.2 The appearance of the workpiece should not have rust, scratches and cracks, and the surface should be cleaned thoroughly during grinding. The fire ratio will read the effect, and the test can be done accurately. 7.1.3 Prepare the light agent according to the ratio. Stir it, bake it in a baking sheath at 150~200℃ for 1~2h, turn it (pith), and dry the upper pieces evenly. 7.1.4 When assembling, there should be a distance of 0~20m between the workpieces and the workpieces and the box. The sample for inspection should be collected in the unused box. The small box effect is 1.1, and the road is placed 3.~3. After the cover is sealed with water-shear refractory mud, 7.1.5 The infiltration box (pith) should be kept at a distance of 150200)mm from the furnace. 7.2.1 The powder will heat the metal and cool it down for a period of time. See Table 3. The time for calculating the maintenance time should be considered. 2.2 After the material is not fully penetrated, 20% of the new reduction agent should be added. The total amount and proportion of the halogenated chain control agent should be added. The powder aluminum additive should be used for 1-5 times and 15% to 20% of the new avoidance agent should be added. After the release agent is dried for 2 times, the release agent should be added. 7.3 Post-treatment. 3.1 Clean the working oil and the lower box. 848-96
250-100
859--85c
Guarantee time
Cold common method
7.3.2 Chrome infiltration, after slight staggering, the process of the base material can generally be selected. After chromium removal, it should be normalized first, then tempered and quenched. The output and quenching should comply with the relevant provisions of JB3.
7.3.3 After zinc treatment, the workpiece is generally heated in 15C~160#. It can also be directly sprayed. Quality inspection
8.1 AppearancebZxz.net
Whose surface color is uniform, letter, without defects such as installation, brake, liquid storage, etc., the surface after painting is silvery white, aluminum is silver or silver color,
8.2 Surface speed
Interface hardness determination
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