厚断面低合金耐磨钢淬火组织及成分优化  

Optimization of Quenching Microstructure and Composition of Thick Section Low Alloy Wear Resistant Steel

作　　者：陈涛[1,2] 吴春京[1] 赵爱民[1] 樊红亮[1] 李晓刚[1] 

机构地区：[1]北京科技大学冶金工程研究院,北京100083 [2]河北工业职业技术学院,河北石家庄050091

出　　处：《热加工工艺》2016年第2期196-199,共4页Hot Working Technology

基　　金：国家自然科学基金资助项目(51271035)

摘　　要：研究了65Mn大断面φ130 mm柱状试样淬火后从表层到心部的相变组织,并测得了从表层到心部的硬度分布。结果表明,柱状试样淬透层深7.5~10 mm,淬硬层硬度55~60 HRC,心部硬度不足40 HRC;通过增加65Mn钢中Mn、Cr等合金元素含量,得到一种新的低合金钢高淬透性材料65MnCr,其临界淬透直径达195 mm,淬透性大大提高。From the surface to the center ofφ130 mm specimens, phase transformation after quenching was studied, also hardness was measured from the surface to the center. The results show that the thickness of hardening layer is 7.5-10 mm, the hardness of hardening layer is 55-60 HRC, hardness of center is less than 40 HRC; a new low alloy steel with high hardenability materials 65MnCr is designed by increasing the content of Mn, Cr and other alloy, critical hardenable diameter of 65MnCr is 195 mm, so the hardenability is greatly improved.

关 键 词：淬透性 淬火 组织 低合金耐磨钢 

分 类 号：TG156.3[金属学及工艺—热处理]