Effect of Quenching and Tempering Parameters on Structure and Properties of 250 mm x 250 mm Square Bloom of Steel EA4T for High Speed Strain Axle

王之香; 王玉玲; 邬中华

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Effect of Quenching and Tempering Parameters on Structure and Properties of 250 mm x 250 mm Square Bloom of Steel EA4T for High Speed Strain Axle

更新时间：2026-01-21

- Effect of Quenching and Tempering Parameters on Structure and Properties of 250 mm x 250 mm Square Bloom of Steel EA4T for High Speed Strain Axle
- Special Steel Vol. 36, Issue 3, Pages: 67-69(2015)
- 作者机构：
  
  山西太钢不锈钢股份有限公司技术中心,太原,030003
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：18 August 2022，
  
  Published：18 August 2015
- 稿件说明：
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王之香, 王玉玲, 邬中华. Effect of Quenching and Tempering Parameters on Structure and Properties of 250 mm x 250 mm Square Bloom of Steel EA4T for High Speed Strain Axle[J]. Special Steel, 2015, 36(3): 67-69.
DOI：

王之香, 王玉玲, 邬中华. Effect of Quenching and Tempering Parameters on Structure and Properties of 250 mm x 250 mm Square Bloom of Steel EA4T for High Speed Strain Axle[J]. Special Steel, 2015, 36(3): 67-69. DOI：

摘要

试验用250 mm×250 mm方坯EA4T车轴用钢（/%:0.23C

0.32Si

0.70Mn

0.014P

0.010S

0.18Mo

0.03V）的生产流程为60 t EBT EAF-LF-VD-8.4 t铸锭轧制-退火工艺。试验研究了880~920℃油淬、600~650℃回火工艺对该钢组织和力学性能的影响。经920 C+600℃、920℃+650℃和880℃+640℃淬-回火处理后

该钢的组织分别为马氏体、索氏体+马氏体和马氏体+贝氏体;880℃+640℃淬-回火处理后EA4T钢的力学性能为R

p0.2

525 MPa

720 MPa

23%

U-5 mm纵向冲击功68~82 J

横向冲击功65~86 J

其组织和力学性能均符合EN13261标准要求。

Abstract

The production flowsheet for test 250 mm x 250 mm square bloom of EA4T steel for axle (/% : 0. 23C

0. 32Si

0. 70Mn

0. 014P

0. 010S

0. 18Mo

0. 03V) is 60 t EBT EAF- LF- VD- 8. 4 t ingot casting- rolling- annealing process. The effect of 880 - 920 °C oil quenching and 600 - 650 °C tempering

process on structure and mechanical properties of the steel is tested and studied. With 920 °C +600 °C

920 °C +650 °C and 880 °C +640 °C quenching-tempering treatment

the structure of steel is respectively martensite

sorbite + martensite and martensite + bainite； the mechanical properties of steel EA4T treated by 880 °C +640 °C quenching-tempering process are R

p0.2

-525 MPa

-720 MPa

-23%

U-5

mm longitudinal impact energy- 68 - 82 J and cross-sectional impact energy- 65 - 86 J

and its structure and mechanical properties all meet the requirement of standard EN13261.

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