Heat treatment process for high-nitrogen stainless bearing steel

A bearing steel, high nitrogen technology, applied in the field of heat treatment

Inactive Publication Date: 2021-04-20
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In view of the fact that the traditional high-carbon and high-chromium stainless bearing steel is difficult to meet the technical requirements of high load, high speed, long life and high reliability, as well as the harsh service environment such as w

Method used

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  • Heat treatment process for high-nitrogen stainless bearing steel
  • Heat treatment process for high-nitrogen stainless bearing steel
  • Heat treatment process for high-nitrogen stainless bearing steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Step (1) quenching and tempering treatment: quenching, cold treatment and high temperature tempering quenching and tempering treatment of high nitrogen stainless bearing steel, quenching temperature 1000 ℃, holding time 60 minutes, cold treatment temperature -73 ℃, holding time 120 minutes, return to The fire temperature is 580~630℃, and the holding time is 240 minutes;

[0016] Step (2) induction hardening: surface induction hardening is carried out on the material processed in step (1) on a high-frequency induction numerical control hardening machine tool, the power frequency is 25KHz, the heating power is 55KW, the moving speed of the device is 600mm / min, preheating 1.5s, induction hardening The water pressure is 0.3MPa, the quenching time is 8s, the water temperature is 26°C, and the cooling medium is 8-9% water-based quenching liquid.

[0017] Step (3) Subsequent heat treatment: The material treated in step (2) is treated at -73°C or -196°C for 2 hours at a low tem...

Embodiment 2

[0021] Step (1) quenching and tempering treatment: quenching, cold treatment and high temperature tempering quenching and tempering treatment of high nitrogen stainless bearing steel, quenching temperature 1000 ℃, holding time 60 minutes, cold treatment temperature -73 ℃, holding time 120 minutes, return to The fire temperature is 580~630℃, and the holding time is 240 minutes;

[0022] Step (2) induction hardening: surface induction hardening is performed on the material processed in step (1) on a high-frequency induction numerical control hardening machine tool, the power frequency is 25KHz, the heating power is 55KW, the device rotation speed is 280mm / min, the heating time is 4.0s, and induction hardening The water pressure is 0.3MPa, the quenching time is 8s, the water temperature is 26°C, and the cooling medium is 8-9% water-based quenching liquid.

[0023] Step (3) Subsequent heat treatment: The material treated in step (2) is treated at -73°C or -196°C for 2 hours at a l...

Embodiment 3

[0027] Step (1) quenching and tempering treatment: quenching, cold treatment and high temperature tempering quenching and tempering treatment of high nitrogen stainless bearing steel, quenching temperature 1000 ℃, holding time 60 minutes, cold treatment temperature -73 ℃, holding time 120 minutes, return to The fire temperature is 580~630℃, and the holding time is 240 minutes;

[0028] Step (2) induction hardening: surface induction hardening is carried out on the material processed in step (1) on a high-frequency induction numerical control hardening machine tool, the power supply frequency is 25KHz, the heating power is 55KW, the device rotation speed is 280mm / min, the heating time is 4.3s, induction hardening The water pressure is 0.3MPa, the quenching time is 8s, the water temperature is 26°C, and the cooling medium is 8-9% water-based quenching liquid.

[0029] Step (3) Subsequent heat treatment: The material treated in step (2) is treated at -73°C or -196°C for 2 hours a...

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Abstract

The invention discloses a heat treatment process for high-nitrogen stainless bearing steel and belongs to the technical field of heat treatment. The high-nitrogen stainless bearing steel comprises the following components in percentage by weight of 0.3 to 0.65% of C, less than or equal to 1.0% of Si, less than or equal to 1.0% of Mn, less than or equal to 0.015% of S, less than or equal to 0.025% of P, 14.5 to 16.0% of Cr, 0.85 to 1.10% of Mo, 0.2 to 0.5% of N, unavoidable impurity elements and the balance of Fe. The high-nitrogen stainless bearing steel is subjected to overall hardening and tempering treatment, high-frequency induction quenching and subsequent heat treatment, so that the surface hardness of a high-nitrogen stainless bearing steel part reaches 58 HRC or above after heat treatment, meanwhile, the hardening and tempering hardness of a core part is kept, and reasonable matching of high hardness, high strength and good toughness is achieved.

Description

technical field [0001] The invention belongs to the technical field of heat treatment, and in particular provides a heat treatment process for high-nitrogen stainless bearing steel. Background technique [0002] In view of the fact that the traditional high-carbon and high-chromium stainless bearing steel is difficult to meet the technical requirements of high load, high speed, long life and high reliability, as well as the harsh service environment such as wear resistance, temperature resistance, corrosion resistance and low noise, in recent years, A series of high-temperature and corrosion-resistant high-nitrogen stainless bearing steels have been developed, such as Cronidur30, SV30 and G30Cr15MoN (X30N). This type of steel is alloyed with 0.10-0.50% nitrogen in the medium and low carbon martensitic stainless steel, so that it has high hardness, high resistance and high corrosion resistance. After nitrogen is added to the steel, the microstructure and carbides are obvious...

Claims

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Application Information

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IPC IPC(8): C21D1/18C21D1/10C21D6/04C22C38/02C22C38/04C22C38/22
CPCY02P10/25
Inventor 徐海峰曹文全俞峰王存宇许达王辉翁宇庆
Owner CENT IRON & STEEL RES INST
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