我国压铸模具钢研究新进展  

New Development of Research on Die Steel for Die-Casting in China

作　　者：雷应华 周许 肖攸毅 张永强 张毅 Lei Yinghua;Zhou Xu;Xiao Youyi;Zhang Yongqiang;Zhang Yi(Daye Special Steel Co.,Ltd.;Hubei Province Key Laboratory of Hight Quality Special Steel,Huangshi 435001)

机构地区：[1]大冶特殊钢有限公司 [2]高品质特殊钢湖北省重点实验室,黄石435001

出　　处：《特殊钢》2022年第5期1-6,共6页Special Steel

摘　　要：介绍了我国压铸模具钢材料研究和应用新进展。通过研究合金元素对压铸模具材料性能影响,开发出低Si、V及含Ni、Co、W等新型压铸模具钢;通过降低钢中S含量、采用RE改变夹杂形态和优化锻造工艺,模具钢等向性能达到90%以上;比较常规电渣重熔、气保电渣重熔和真空自耗三种工艺生产的压铸材料,钢中N含量分别为150×10^(-6)、90×10^(-6)和≤40×10^(-6),O含量分别为24×10^(-6)、15×10^(-6)和6×10^(-6);利用ASPEX Explorer型金属质量分析仪对三种工艺夹杂物指数统计分析,采用真空自耗冶炼的非金属夹杂物数量呈指数减少,并且没有>5μm的非金属夹杂物,模具冲击性能大幅提升,7 mm×10 mm无缺口冲击功可达到450 J;制定了高端压铸模具材料显微组织、无缺口冲击评价指标和规范;随着一体化压铸技术发展,未来模具材料向着大型化、超洁净、高精度和长寿命方向发展。The research and application new achievements of die steel materials for die-casting in China are introduced.By studying the influence of alloying elements on properties of die material,a new die steel for die-casting with low Si,V and Ni,Co and W has been developed.By reducing the content of S in steel,using RE to change the shape of inclusion and optimizing forging process,the isotropic properties of the die-steel can reach to more than 90%;To make a comparison between conventional electric slag,gas shielded electric slag and vacuum consumable process remelted three die-casting material,nitrogen in steel is respectively 150×10^(-6),90×10^(-6)and≤40×10^(-6),oxygen content in steel is respectively 24×10^(-6),15×10^(-6)and 6×10^(-6);By ASPEX Explorer metal quality analyzer for inclusions index statistics and analysis of three kinds of technology,using vacuum consumable smelting,the number of non-metallic inclusions in steel decreases exponentially,with no larger than 5μm inclusions,material impact performance largely increases,7 mm×10 mm non-notched impact energy can reach 450 J;to develop high-end die-casting mould material microstructure,the non-notched impact evaluation index standard and specification are established with the development of integrated die casting technology,the future mold material shall develop toward large-scale,super pure,high precision and long life direction.

关 键 词：压铸模具钢 研究应用 进展 

分 类 号：TG142.1[一般工业技术—材料科学与工程]