Effect of Nb on Structure and Mechanical Properties of Cr-Co-Ni-Mo Series High Strength Gear Steel

王飞; 王瑞; 李建新; 赵成志; 于宗洋; 李如

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Effect of Nb on Structure and Mechanical Properties of Cr-Co-Ni-Mo Series High Strength Gear Steel

更新时间：2026-01-21

- Effect of Nb on Structure and Mechanical Properties of Cr-Co-Ni-Mo Series High Strength Gear Steel
- Special Steel Vol. 39, Issue 3, Pages: 59-61(2018)
- 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：17 January 2018，
  
  Online First：02 June 2022，
  
  Published：02 June 2018
- 稿件说明：
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王飞, 王瑞, 李建新, et al. Effect of Nb on Structure and Mechanical Properties of Cr-Co-Ni-Mo Series High Strength Gear Steel[J]. Special Steel, 2018, 39(3): 59-61.
DOI：

王飞, 王瑞, 李建新, et al. Effect of Nb on Structure and Mechanical Properties of Cr-Co-Ni-Mo Series High Strength Gear Steel[J]. Special Steel, 2018, 39(3): 59-61. DOI：

摘要

所研究的Cr-Co-Ni-Mo齿轮钢(/%:0.05～0.15C

4.2～6.3Ni

14.5～16.2Co

4.2～6.4Cr

3.8～5.3Mo

0.8～1.5W

0.1～0.4V

≤0.005S

≤0.008P

不加Nb和加0.01～0.03Nb)由200 kg真空感应冶炼+真空自耗重熔冶炼

并轧成Φ50mm的棒材。试样经1 050℃ 1h固溶处理

油冷

-80℃ 2 h冷处理

再经560℃ 7h时效处理。结果表明

加Nb钢中

Nb在晶界或亚晶界以微合金碳氮化物存在

有细晶强化作用

加0.01%～0.03%Nb后钢的抗拉、屈服强度和冲击功分别由无Nb钢的1 850、1 598 MPa和22 J提高至2057、1 964 MPa和33J。

Abstract

The studied Cr-Co-Ni-Mo gear steel (/% : 0.05 ~ 0. 15C

4. 2 ~ 6. 3Ni

14. 5 ~ 16. 2Co

4. 2 ~ 6. 4Ct

3. 8 〜5.3Mo

0. 8 ~ 1. 5W

0.1 ~0.4V

≤ 0.005S

≤ 0. 008P

non-adding Nb or adding 0. 01 ~0. 03Nb) is steelmaking by 200 kg vacuum induction melting + vacuum arc remelting process and rolling to Φ50 mm bar products. The testing specimen is solid-solution-treated at 1 050℃ for 1 h and oil cooling

and cold-treated at -80℃ for 2 h

then aging-treated at 560 °C for 7 h. Results show that in steel bearing Nb

Nb microalloy carbon-nitride exists at grain boundary or sub-grain boundary

it has the fine grain strengthening function

as a result with adding 0. 01% ~ 0

03% Nb the tensile

yield strength and impact energy of steel increase respectively from non-Nb steel 1 850 MPa

1 598 MPa and 22 J to 2 057 MPa

1 964 MPa and 33 J.

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