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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。
In order to improve the mechanical properties of high silicon steel, by optimizing the chemical composition of the alloy, the use of advanced heat treatment technology and steel purification technology to silicon as the main alloying elements, carbon steel or silicon steel scraps as the main raw material, waste graphite or graphite Other carburizing agent by carbon, ferrosilicon alloy or silicon carbide by silicon, developed a new high-silicon wear-resistant cast steel. In the experiment, the microstructure and mechanical properties of the material were analyzed. The results show that the microstructure of wear-resistant high-silicon cast steel consists of bainite and austenite at the temperature of 320 ℃, the tensile strength σb is 1500-1800 MPa, the yield strength σ 0.2 is 1200-1600 MPa, the impact toughness Degree ak = 15 ~ 30 J / cm, elongation δ = 3% ~ 10%, hardness higher than 50 HRC.