Effect of Heat Treatment on Microstructure and Properties of 40CrMnSiB Low Alloy Ultra-High Strength Steel

李建新; 王飞; 翟羽佳; 王瑞

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Effect of Heat Treatment on Microstructure and Properties of 40CrMnSiB Low Alloy Ultra-High Strength Steel

更新时间：2026-01-21

- Effect of Heat Treatment on Microstructure and Properties of 40CrMnSiB Low Alloy Ultra-High Strength Steel
- Special Steel Vol. 41, Issue 2, Pages: 47-49(2020)
- 作者机构：
  
  抚顺特殊钢股份有限公司技术中心,抚顺,113001
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：11 September 2019，
  
  Online First：21 April 2022，
  
  Published：21 April 2020
- 稿件说明：
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李建新, 王飞, 翟羽佳, et al. Effect of Heat Treatment on Microstructure and Properties of 40CrMnSiB Low Alloy Ultra-High Strength Steel[J]. Special Steel, 2020, 41(2): 47-49.
DOI：

李建新, 王飞, 翟羽佳, et al. Effect of Heat Treatment on Microstructure and Properties of 40CrMnSiB Low Alloy Ultra-High Strength Steel[J]. Special Steel, 2020, 41(2): 47-49. DOI：

摘要

采用OM、SEM、JMatPro7.0分析技术

研究了热处理工艺(860～950℃淬火+200～400℃回火)对新型中碳40CrMnSiB低合金超高强度钢(0.41C

0.84Cr

0.76Mn

1.44Si

0.006B)微观组织及力学性能的影响。结果表明:920℃淬火和300℃回火钢的力学性能达到最佳强韧性匹配

即抗拉强度为1 943 MPa、屈服强度为1 931 MPa、延伸率为9%、断面收缩率为39.5%、冲击吸收功为44J、HRC硬度值为52.7。

Abstract

The effects of heat treatment ( quenched at 860 〜950 °C + tempered at 200 ~ 400 ℃ ) on the microstructure and mechanical properties of a new medium carbon 40CrMnSiB low alloy ultra-high strength steel (0. 41C

0. 84Cr

0.76Mn

1.44Si

0. 006B) are investigated by OM

SEM and JMatPro7. 0 analysis techniques. The results show that with quenched at 920℃ . and tempered at 300 °C

the mechanical properties of the steel reach the best toughness matching

that is

the tensile strength 1943 MPa

the yield strength 1931 MPa

the elongation 9%

and the reduction of area 39. 5%

the impact absorption work 44 J

and the HRC hardness value 52.7.

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