Microstructure Evolution and Mechanical Properties of 0.4C-Si-Mn-Cr Steel during High Temperature Deformation

被引：12

作者：

Zhang, Fei ^{[1
,2
]}

Yang, Yang ^{[1
,2
]}

Shan, Quan ^{[1
,2
]}

Li, Zulai ^{[1
,2
]}

Bi, Jinfeng ^{[1
,2
]}

Zhou, Rong ^{[1
,2
]}

机构：

[1] Kunming Univ Sci & Technol, Sch Mat Sci & Engn, Kunming 650093, Yunnan, Peoples R China

[2] Kunming Univ Sci & Technol, Natl & Local Joint Engn Lab Adv Met Solidificat F, Kunming 650093, Yunnan, Peoples R China

来源：

MATERIALS | 2020年 / 13卷 / 01期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

deformation; height-diameter ratio; pearlite; impact toughness; LOW-CARBON STEEL; DYNAMIC RECRYSTALLIZATION; BEHAVIOR; COMPRESSION; SILICON; AL;

D O I：

10.3390/ma13010172

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Herein, the effects of height-diameter ratios (H/D) on the microstructure evolution and mechanical properties of 0.4C-Si-Mn-Cr steel during high temperature deformation are reported. The compression experiments were performed on steel samples using Gleeble to obtain a reasonable deformation temperature, and the degree of deformation was assessed in the range of 1.5 to 2.0 H/D via forging. The forged specimens were quenched using the same heat treatment process. The hardness and impact toughness of the steel samples were tested before and after heat treatment. Grain sizes gradually increased with an increase in the compression temperature from 950 degrees C to 1150 degrees C, and the grain sizes decreased with an increase in H/D. The microstructure of the steel samples contained pearlite, bainite, martensite, and retained austenite phase. The microstructure after forging was more uniform and finer as compared to that of as-cast steel samples. The hardness and impact toughness of the steel samples were evaluated after forging; hardness first increased and then decreased with an increase in H/D, while the impact toughness continuously increased with an increase in H/D. Hence, the microstructure and properties of steel could be improved via high temperature deformation, and this was primarily related to grain refinement.

引用

页数：11

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