高硅耐磨铸钢化学成分和热处理工艺的优化设计
Chemical Composition of Wear Resistant Cast Steel and Optimization Design of Heat Treatment Process
王桂林
点击：3503次 下载：0次
作者单位：(商丘职业技术学院 机电工程系, 河南 商丘 476000)
中文关键字：高硅耐磨铸钢； 熔炼工艺； 热处理； 金相组织； 力学性能
英文关键字：wear resistant high silicon cast steel; melting process; heat treatment; microstructure; mechanical properties
中文摘要：为提高高硅铸钢的力学性能，通过优化合金的化学成分，采用先进的热处理工艺和钢水净化技术，以硅为主要合金元素，以碳钢或硅钢下脚料为主要原材料， 用废电极石墨或其他增碳剂增碳， 硅铁合金或碳化硅增硅， 开发了一种新型高硅耐磨铸钢。实验中对该材料的金相组织、力学性能进行了分析。结果表明：在320℃等温淬火时，高硅耐磨铸钢组织由贝氏体和奥氏体组成；抗拉强度σb=1500～1800 MPa，屈服强度σ0.2=1200～1600 MPa，冲击韧度ak=15～30 J/cm，伸长率δ=3%～10%，硬度高于50 HRC。
英文摘要：In order to improve the mechanical properties of high silicon cast steel, by optimizing the chemical composition of alloys, making use of advanced heat treatment technology and molten steel purification technology, choosing silicon as the main alloying elements, carbon steel or silicon steel scrap as the main raw material, using waste carbon electrode graphite or others as carbon agent, using silicon alloy or silicon carbide as sillicon agent, new wear resistant high silicon cast steel was developed. The microstructure, mechanical properties of the alloy were analyzed. The results show that, when austempering at 320 ℃, high silicon cast steel is composed of bainite and austenite. The tensile strength, yield strength, impact toughness and extend rate is σb=1500～1800 MPa, σ0.2=1200～1600 MPa, ak=15～30 J/cm and δ=3%～10%, respectively. The hardness is greater than 50 HRC.