低合金高强钢中针状铁素体控制的综述  

Review on the control of the acicular ferrite in high strength low alloy steels

作　　者：姚浩 任强 张立峰 YAO Hao;REN Qiang;ZHANG LiFeng(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;School of Mechanical Engineering,Yanshan University,Qinhuangdao 066044,China;School of Mechanical and Materials Engineering,North China University of Technology,Beijing 100144,China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]燕山大学机械工程学院,河北秦皇岛066044 [3]北方工业大学机械与材料工程学院,北京100144

出　　处：《炼钢》2022年第2期1-10,24,共11页Steelmaking

基　　金：河北省省级科技计划资助项目(20311004D,20591001D)。

摘　　要：在低合金高强钢中,形成大量的针状铁素体是满足高强度和高韧性的主要方法。影响针状铁素体体积分数的几个关键因素在不同的文献均有体现,也有综述文献总结了针状铁素体形核机制和有利于形核的夹杂物特征,但是并没有系统地总结各因素变化带来的影响。本文总结了奥氏体晶粒尺寸、冷却速率、夹杂物成分、夹杂物尺寸的变化对针状铁素体体积分数的影响。得出结论如下:奥氏体晶粒尺寸为100~200μm、冷却速率为5~10℃/s、夹杂物尺寸为1~2μm和(Ti、Mg、Zr)O_(x)夹杂物均有利于促进针状铁素体形核。The formation of volumes of acicular ferrite in high strength low alloy steels is a principal mean to meet high strength and toughness.Several decisive factors affecting the volume fraction of acicular ferrite were reflected in different literatures,and the nucleation mechanism of acicular ferrite and inclusions characteristics conducive to nucleation were summarized by some review,but there was no systematic summary of the effect of variation on apiece factor.In this study,the influence of austenite grain size,cooling rate,inclusion composition,and inclusion size on the volume fraction of acicular ferrite has been summarized.It is concluded that austenite grain size of 100-200μm,cooling rate of 5-10℃/s,inclusion size of 1-2μm and composition of(Ti、Mg、Zr)O_(x) are beneficial to promote acicular ferrite nucleation.

关 键 词：针状铁素体 奥氏体晶粒尺寸 冷却速率 夹杂物成分 夹杂物尺寸 

分 类 号：TF762[冶金工程—钢铁冶金]