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Heat treatment technology for stainless steel workpieces

A technology for stainless steel and parts, applied in the field of heat treatment of stainless steel parts, can solve the problems of elastic limit, low surface hardness, yield point and toughness cannot meet design requirements, etc., to reduce stress, improve surface hardness, and avoid deformation.

Inactive Publication Date: 2016-08-24
宁波市鄞州兴达旅游用品厂
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Due to the above characteristics, stainless steel is used more and more widely. However, traditional stainless steel parts are affected by the production process, making their surface hardness low, elastic limit, yield point and toughness can not meet the design requirements

Method used

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Embodiment Construction

[0013] The invention provides a heat treatment process for stainless steel parts, which comprises the following steps:

[0014] A. Quenching. Heat the stainless steel parts to 930°C-960°C with a heating furnace, and keep them warm at this temperature for 2.5-3.5 hours, and then oil-cool the stainless steel parts. When the surface temperature of the stainless steel parts is ≤110°C take out;

[0015] B. Tempering at medium temperature, place the quenched stainless steel parts in a heating furnace and heat them to 400°C-450°C, and keep them at this temperature for 8-10 hours, then take out the stainless steel parts and air-cool them to room temperature.

[0016] In order to achieve a better heat treatment effect, heat the stainless steel parts to 950 ° C, and keep them at this temperature for 3 hours, then oil-cool the stainless steel parts, and take them out when the surface temperature of the stainless steel parts is ≤ 110 ° C;

[0017] The quenched stainless steel parts are p...

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Abstract

The invention provides a heat treatment technology for stainless steel workpieces. The heat treatment technology comprises the following steps: quenching, heating a stainless steel workpiece to 930-960 DEG C, keeping the temperature for 2.5-3.5 h, oil-cooling the stainless steel workpiece, and taking out the stainless steel workpiece when surface temperature of the stainless steel workpiece is less than or equal to 110 DEG C; carrying out medium-temperature tempering, putting the quenched stainless steel workpiece into a heating furnace and heating to 400-450 DEG C, keeping the temperature for 8-10 h, taking out the stainless steel workpiece and air-cooling the workpiece to room temperature. According to the stainless steel heat-treatment technology, oil quenching is carried out after heating so as to reduce stress generated during the cooling and avoid deformation and simultaneously enhance surface hardness of the stainless steel workpiece. Through medium-temperature tempering, a tempered troostite is obtained, and high elasticity and yield point and proper toughness are achieved.

Description

technical field [0001] The invention relates to a heat treatment process, in particular to a heat treatment process for stainless steel parts. Background technique [0002] Stainless steel is the abbreviation of stainless and acid-resistant steel. The steel grades that are resistant to weak corrosive media such as air, steam, and water, or have stainless properties are called stainless steel; The first kind is called acid-resistant steel. Due to the difference in chemical composition of the two, their corrosion resistance is different. Ordinary stainless steel is generally not resistant to chemical medium corrosion, while acid-resistant steel is generally stainless. Due to the above characteristics, stainless steel is used more and more widely. However, traditional stainless steel parts are affected by the production process, making their surface hardness low, elastic limit, yield point and toughness unable to meet design requirements. Contents of the invention [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18
Inventor 钱兴达
Owner 宁波市鄞州兴达旅游用品厂
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