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Heat treatment quenching technology for chrome-molybdenum hubbing steel precision part

A technology of precision parts and die steel, which is applied in the field of heat treatment and quenching process of chrome-molybdenum die steel precision parts, can solve the problems of large influence of heat treatment process, complex heat treatment process, difficulty in exerting excellent performance, etc., and achieve significant social and economic benefits , high engineering application value, fine carbide effect

Inactive Publication Date: 2018-03-23
HUBEI ENG INST
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Problems solved by technology

[0004] Some precision parts in semiconductor packaging equipment use ASSAB XW-10 chrome-molybdenum die steel. In addition to requiring high hardness, good wear resistance, small quenching size deformation, long life and high reliability, it also requires certain impact and better performance. Wear resistance; however, the alloy composition of chrome-molybdenum die steel has a great influence on the heat treatment process, which leads to complex heat treatment process. If the heat treatment is improper, it is not only difficult to exert its excellent performance, but also difficult to control the quality, and it is easy to scrap in batches

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  • Heat treatment quenching technology for chrome-molybdenum hubbing steel precision part

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specific Embodiment

[0017] Specific examples are as follows:

[0018] see figure 1 , ordinary chromium molybdenum die steel precision punch with an average thickness of 32mm, the hardness requirement is HRC61

[0019] (1) Put a batch of workpieces with a thickness of about 32mm into the quenching furnace to preheat twice, the first heating rate is less than 75 ° C / hour to 100 ° C, the second heating rate is less than 115 ° C / hour to 150°C;

[0020] (2) After the workpiece is preheated, continue to heat to 760°C and hold it for 70 minutes, heat it to the quenching temperature of 968°C and hold it for 52 minutes;

[0021] (3) Place the workpiece out of the furnace on the bracket, turn on the blower, and air cool the workpiece to 55°C;

[0022] (4) When the workpiece is air-cooled to 55°C, it is immediately put into the tempering furnace, heated to 175°C, tempered and kept for 135 minutes, and then it is naturally air-cooled when it is out of the furnace;

[0023] (5) When the workpiece is a...

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Abstract

The invention discloses a heat treatment quenching technology for a chrome-molybdenum hubbing steel precision part. The technology comprises the steps that 1, a workpiece is placed into a quenching furnace to be preheated two times to 150 DEG C; 2, the workpiece is heated in the quenching furnace in two levels to the quenching temperature of 968 DEG C and kept warm; 3, te workpiece is discharged from the furnace, air cooled and quenched to 55 DEG C; and 4, the workpiece is placed into a tempering furnace two times to 175 DEG C, kept warm, tempered, discharged out of the furnace and air cooled.The workpiece is heated in the quenching furnace in two levels to the quenching temperature and kept warm, and the workpiece is preheated, continues to be heated to 760 DEG C and is kept warm for 70min, heated to the quenching temperature of 968 DEG C and kept warm for 52 min. The service life and mechanical property of two knife edge parts (comprising a male die and a female die) are remarkablyimproved, die work parts have high hardness, high impact toughness and wear resistance, and excessive abrasion, deformation, fragile cracking and other early failure are prevented.

Description

【Technical field】 [0001] The invention relates to the technical field of steel heat treatment, in particular to a heat treatment and quenching process for precision parts of chrome-molybdenum die steel. 【Background technique】 [0002] With the upgrading of my country's manufacturing industry, some precision equipment has more and more stringent requirements for parts and components. Domestic materials cannot meet their requirements in some aspects of performance, so relevant advanced imported materials have to be used, especially those from Germany, Sweden and other countries. Pure steel has excellent qualities such as pure, high grain refinement and uniform structure. The import volume has been increasing in recent years, but the heat treatment level is not suitable for it, and it is difficult to exert its performance, resulting in huge waste. Some suppliers have to set up domestic steel. It is not only difficult for a specialized heat treatment service factory to meet its in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D6/00
CPCC21D1/18C21D6/002
Inventor 王涛焦玉
Owner HUBEI ENG INST
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