A Study on Delayed Fracture Resistance of Low Carbon Nb-V Microalloying High Strength Cold Heading Boron Steel

周新龙; 叶飞; 陈伟庆; 刘振清

您当前的位置：

首页 >

文章列表页 >

A Study on Delayed Fracture Resistance of Low Carbon Nb-V Microalloying High Strength Cold Heading Boron Steel

更新时间：2026-01-21

- A Study on Delayed Fracture Resistance of Low Carbon Nb-V Microalloying High Strength Cold Heading Boron Steel
- Special Steel Vol. 30, Issue 3, Pages: 10-12(2009)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：25 November 2008，
  
  Online First：22 November 2022，
  
  Published：22 November 2009
- 稿件说明：
移动端阅览
周新龙, 叶飞, 陈伟庆, et al. A Study on Delayed Fracture Resistance of Low Carbon Nb-V Microalloying High Strength Cold Heading Boron Steel[J]. Special Steel, 2009, 30(3): 10-12.
DOI：

周新龙, 叶飞, 陈伟庆, et al. A Study on Delayed Fracture Resistance of Low Carbon Nb-V Microalloying High Strength Cold Heading Boron Steel[J]. Special Steel, 2009, 30(3): 10-12. DOI：

摘要

试验用低碳硼钢(%:0.13～0.21C、0.000 5～0.003 7B)和低碳Nb-V微合金化硼钢(%:0.18～0.24C、0～0.033Nb、0～0.050V、0.000 5～0.002 2B)分别由实验室50 kg真空感应炉和碳管炉冶炼

轧-锻成φ13 mm圆棒

然后加工成拉伸和带缺口的延迟断裂试样。经950℃水淬+200℃回火处理后钢的延迟断裂性由延迟断裂强度比R=σ

(延迟断裂强度)/σ

(拉伸强度)表示。结果表明

0.028%Nb-0.032%V微合金化0.000 5%B钢的σe为1 480 MPa

R值为0.665

均高于880℃油淬+400℃回火40Cr钢和35CrMo钢的σ

和R值(σ

分别为1 460 MPa和1 530 MPa

R值0.583和0.556)。

Abstract

Test low carbon boron steel ( % ：0. 13 〜0. 21C

0. 000 5 〜0. 003 7B) and low carbon Nb-V microalloying boron steel ( % ：0. 18 〜0. 24C

0-0. 033Nb

0 〜0. 050V

0. 000 5 〜0. 002 2B) were melted respectively by laboratory 50 kg vacuum induction furnace and carbon tube furnace

and the tensile specimen and notched delayed fracture specimen were turned from φ13 mm rolled-forged rod. The delayed fracture resistance of test steels water-quenched at 950 T and tempered at 200℃ is presented by delayed fracture strength ratio R =σ

( delayed fracture strength) /

( tensile strength). Results showed that the tensile strength of 0. 000 5% B steel microalloying with 0. 028% Nb and 0. 032% V was 1 480 MPa and its R value was 0. 665 which w

as higher than that of 40Cr steel and 35CrMo steel queched at 880 ℃

oil cold + tempered at 400 ℃ (both σ

were respectively 1 460 MPa and 1 530 MPa

R value 0. 583 and 0. 556).

关键词

Keywords

references

Views

下载量

CSCD

CNKI被引量

Alert me when the article has been cited

提交

Tools

Publicity Resources

No data

Related Author

No data

Related Institution

No data

⁰