A Study on Decarburization Trend of New High Strength and Toughness Spring Steels 40T and 44T

尹钟大; 徐德祥; 刘德富

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A Study on Decarburization Trend of New High Strength and Toughness Spring Steels 40T and 44T

更新时间：2026-01-21

- A Study on Decarburization Trend of New High Strength and Toughness Spring Steels 40T and 44T
- Special Steel Vol. 26, Issue 3, Pages: 39-40(2005)
- 作者机构：
  
  哈尔滨工业大学,哈尔滨,150001
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- Online First：26 May 2023，
  
  Published：26 May 2005
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尹钟大, 徐德祥, 刘德富. A Study on Decarburization Trend of New High Strength and Toughness Spring Steels 40T and 44T[J]. Special Steel, 2005, 26(3): 39-40.
DOI：

尹钟大, 徐德祥, 刘德富. A Study on Decarburization Trend of New High Strength and Toughness Spring Steels 40T and 44T[J]. Special Steel, 2005, 26(3): 39-40. DOI：

摘要

新型高强韧性弹簧钢40T(%:0.41C-2. 12Si- 1.03Cr- 1.98Ni-0.31Mo-0.25V)

44T(%:0.44C-2.28Si- 1.42Cr-0.25V)和弹簧钢60Si2CrVA(%:0.59C-1.65Si-1.11Cr-0.18V)的φ18 mm 和φ26 mm 试验钢材由北满特钢 20t电弧炉冶炼，经轧制、冷拔而成。各钢材经860～1000℃加热脱碳试验的结果表明，40T钢碳含量较低，并有～2%Ni

其脱碳倾向明显低于44T钢和60Si2CrVA钢；880 ℃加热1 h时，40T钢没有脱碳，44T钢脱碳层深 0.05mm

60Si2CrVA钢脱碳层深0.15 mm;1000 ℃加热20 min

40T钢脱碳层深0.1 mm

44T 钢0.2 mm

60Si2CrVA钢0.4 mm。40T钢脱碳倾向小，有利于提高弹簧的疲劳寿命。

Abstract

The φ18mm and φ26mm test stel products of new high strength and toughness spring steel 40T;0.41C- 2.12Si- 1.03Cr- 1.98Ni-0.31Mo-0.25V

steel 44T:0.44C-2.28Si- 1.42Cr-0.25V and spring steel 60Si2CrVA:0.59C- 1.65Si- 1. 11Cr-0. 18V were produced by 20 t are fumace melting

rolling and cold drawing. The results of each steel product by heating decarburizing test showed that due to lower carbon content and contained ～2% Ni in steel 40T

the decarburization trend of steel 40T obviously lower that of steel 44T and steel 60Si2CrVA: heating at 880 ℃ for 1h

there was nodecarburization in steel 40T

depth of decarburization layer was 0.05mm in steel 44T and 0.15 mm in steel 60Si2CrVA; and heating at 1000 ℃ for 20 min

the depth of decarburization layer was 0. 1mm in steel 40T

0.2 mm in steel 44T and 0.4 mm in 60Si2CrVA. The smaller decarburization trend of steel 40T is favourable to increase the fatigue life of spring.

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