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A heat treatment process for low carbon alloy materials

A low-carbon alloy and process technology, applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of unsatisfactory requirements, unsatisfactory system heat treatment technology, etc., and achieve service life extension, bending Improvement of performance, effect of increasing hardness and strength

Inactive Publication Date: 2011-12-14
MEISHAN HENGSHENG MECHANICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the processing technology of low-carbon alloy materials for riveting devices, especially 12Cr2Ni4 materials, there is no systematic and comprehensive processing technology solution, and the results of material processing cannot meet the satisfactory requirements. The tempering heat treatment process can obtain higher surface hardness and core toughness. Under the condition of maintaining high toughness inside the workpiece, a high hardness and high strength surface layer can be obtained to improve the wear resistance and toughness of the workpiece. Strength, but its service life is also closely related to the toughness of the surface layer and the good cooperation between the surface layer and the core.
There is currently no satisfactory system heat treatment technology

Method used

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  • A heat treatment process for low carbon alloy materials
  • A heat treatment process for low carbon alloy materials
  • A heat treatment process for low carbon alloy materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare the material and take the rivet made of 12CR2NI4 alloy material to remove the surface debris.

[0032] Thermal treatment, the rivet made of the above 12CR2NI4 alloy material is treated according to the following steps,

[0033] 1. Carbon and nitrogen penetrate together. Under the conditions of 850 ° C to 870 ° C, the processing workpiece is dripped at 180 to 200 drops per minute and the water -free methanol is dropped. After the stability lasts for 60 to 90 minutes, it will be 120 to 140 drops per minute per minute.The speed dripping coal oil is at the same time of 240 to 280 ml / minute.After 99.99 % ammonia qi 150 to 180 minutes; the cooling to 660 ° C to 720 ° C, dripping at a speed of 60 to 90 drops per minute, plus water -free methanol at the same time at 80-120 ml / minute, 99.99 % ammonia gas 90 ~From 120 minutes to normal temperature; the following table can be used in the field of carbon and nitrogen.

[0034] 2. After quenching, the carbon nitrogen seeps is se...

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Abstract

The invention discloses a heat treatment process of a low-carbon alloy material, and the heat treatment process comprises the steps of carbonitriding treatment, quenching treatment, cryogenic treatment and tempering treatment. The low-carbon alloy material, in particular 12Cr2Ni4 alloy material after the treatment through the process can obtain the surface with higher hardness and the heart part with strong toughness, and under the condition of keeping the higher toughness in a workpiece, a surface layer with high hardness and high strength can be obtained, thereby improving the abrasion resistance and the strength of the workpiece and enabling the service life of the workpiece to be in a close relationship with the toughness of the surface layer and good matching of the strong toughness of the surface layer and the heart part. After adopting the cryogenic treatment, the service life can be well prolonged and the hardness and the strength of a matrix can be improved.

Description

Technical field [0001] The present invention is a thermal treatment technology field for metal materials, especially the heat treatment process of low -carbon alloy materials. Background technique [0002] Thermal treatment technology usually includes technical methods such as carbon nitrogen co -seepage, quenching, deep cold treatment, and fire recovery. Especially for the recent development of deep -cold treatment, the characteristics of materials have been further improved after the treatment of materials.When the metal is hardened to the cooling process, the alloys and carbon are dissolved and combined and diffused to form Austenite. During the cooling process, Martensite is formed due to the suppression of low temperature.The final change point (MF) of Mate Ages (MF) is very low, so quenching and cooling to room temperature will remain a large amount of Austennic, so it reduces the hardness, abrasion resistance and service life of the metal. At the same timeBroken cracking, ...

Claims

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Application Information

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IPC IPC(8): C23F17/00C23C8/32C21D1/18C21D1/00
Inventor 张森林张永明
Owner MEISHAN HENGSHENG MECHANICAL EQUIP
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