冶炼工艺对大尺寸铝挤压模具钢组织和性能的影响  

Effect of Smelting Process on Microstructure and Properties of Large Size Aluminum Extruding Die Steel

作　　者：孙立国 康爱军 马野 Sun Liguo;Kang Aijun;Ma Ye

机构地区：[1]抚顺特殊钢股份有限公司,辽宁抚顺113001

出　　处：《模具制造》2020年第5期87-89,共3页Die & Mould Manufacture

摘　　要：利用金相显微镜和冲击试验机等研究了冶炼工艺对大尺寸铝挤压模具钢H13钢组织和性能的影响。结果表明:试验钢采用电渣熔速15~16kg/min和13~14kg/min两种不同的冶炼工艺,可以生产出化学成分符合NADCA#207标准的H13钢。采用电渣熔速13~14kg/min,电渣重熔φ1,100mm电渣锭,大型快锻机锻造成材φ635mm圆钢,退火组织碳化物分布更加均匀,未见液析碳化物和网状碳化物,冲击韧性比采用电渣熔速15~16kg/min的φ635mm圆钢的平均冲击功提高11.7%。The influence of smelting process on microstructure and properties of large aluminum extruding die steel H13 was studied by means of metallographic microscope and impact testing machine,the results show that H13 steel with chemical composition conforming to NADCA#207 can be produced by electroslag rate of 15~16kg/min and 13~l4kg/min,the electroslag melting speed is 13~14kg/min,The electroslag remeltingφ1,100mm electroslag ingot,the large scale fast forging machine is forged intoφ635mm round steel,The annealing structure carbide distribution is more uniform,no liquid carbide and mesh carbide is seen,the impact toughness is 11.7%higher than that ofφ635mm round steel with electroslag melting speed of 15~l6kg/min.

关 键 词：铝挤压 锻造 显微组织 冲击性能 

分 类 号：TG162[金属学及工艺—热处理] TG142[金属学及工艺—金属学]