摘要
研究了一种新型Mn-Cr-Mo-Ni-Cu-RE多元低合金耐磨钢的热处理工艺,利用热膨胀实验测量试验钢的Ac1、Ac3、Ms、Mf等相变温度,借助光学显微镜、扫描电镜、透射电镜等手段,研究了钢的显微组织和断口形貌,测量力学性能,考察热处理工艺对钢的力学性能的影响。研究结果表明,试验钢的相变温度为Ac1=770℃、Ac3=820℃、Ms=340℃、Mf=265℃,经900℃淬火及230℃回火后获得贝/马氏体复相组织,试验钢具有良好的综合力学性能、高强度和高韧性,其硬度达到HRC 52,冲击韧度αKU达到40 J.cm-2。
The heat treatment process for a new type of Mn-Cr-Mo-Ni-Cu-RE complex low alloy wear resistant steel was studied in this paper. The solid transformation temperatures of the complex low alloy steel, such as Ac1, Ac3, Ms, and Mf, were determined according to the thermal dilation experiments. The microstructure, fracture morphology of the steel, and the effect of heat treatment on mechanical properties were studied by means of optical microscopy （OM）, scanning electron microscopy （SEM） and transmitted electron microscopy （TEM）, etc. The results show that the solid transformation temperatures of this complex low alloy steel are. Ac1 =770℃, Ac3 =820 ℃, Ms = 340 ℃, Mf =265 ℃. The steel is composed of bainite and martensite phases after quenched at 900 ℃ and tempered at 230 ℃. The steel has good comprehensive mechanical properties with hardness HRC 52 and impact toughness αku=40 J.cm^-2.
出处
《铸造》
CAS
CSCD
北大核心
2011年第9期899-902,共4页
Foundry
关键词
低合金耐磨钢
热处理
贝/马氏体复相组织
硬度
冲击韧度
low alloy wear resistant steel
heat treatment
bainite/martensite compound microstructure
hardness
impact toughness
