ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2010, Vol. 31 ›› Issue (5): 49-50.

• 工艺技术 • 上一篇    下一篇

预硬化塑料模具钢718厚板的开发

王生朝,孙斌   

  1. 湖南工业大学冶金工程学院,株洲 412000
  • 收稿日期:2010-05-19 出版日期:2010-10-01 发布日期:2022-11-11
  • 作者简介:王生朝(1970-),男,副教授,材料加工研究

Development of Heavy Plate of Pre-hardened Plastic Die Steel 718

Wang Shengzhao , Sun Bin   

  1. School of Metallurgical Engineering, Hunan University of Technology, Zhuzhou 412000
  • Received:2010-05-19 Published:2010-10-01 Online:2022-11-11

摘要: 开发的模具钢718(%:0.32~0.40C、0.30~0.50Si、1.00~1.50Mn、≤0.016P、≤0.005S、1.50~2.00Cr、0.40~0.50Mo、0.80~1.20Ni、0.020~0.045Al)198~308 mm厚板的生产工艺流程为90~100 t EAF-LFVD-40 t电渣重熔(950 mm×2 000 mm板坯)-轧制(控冷)-热处理。检验结果表明,钢中的P为0.009%~0.012%,S为0.001%~0.003%,钢中气体含量为(45~60)×10-6[N],1.5×10-6[H],(13~18)×10-6[O];钢板平均HB值为317~352,其组织为回火贝氏体+少量回火索氏体,满足各类模具的加工和表面质量要求。

关键词: 模具钢718, 厚板, 生产工艺, 组织, 硬度

Abstract: The production process flow sheet for 198 〜308 mm heavy plate of developed die steel 718 ( % : 0.32〜0.40C, 0.30~0.50Si, 1.00~1.50Mn, ≤0.016P, ≤0.005S, 1.50~2.00Cr, 0.40-0.50Mo, 0.80~1.20Ni, 0.020-0.045Al) is 90 ~ 100 t EAF-LF-VD-40 t ESR (950 mm x 2 000 mm slab) -rolling (control cooling) -heat treatment. Examination results show that the P content in steel is 0.009%~0.012% , the S content is 0.001%~0.003% , and the gases contents are (45~60) x 10-6[N], 1.5 x 10-6[ H] and (13~18) x 10-6 [O] ; the average value of HB hardness is 317~352 with structure of tempered bainite + minor tempered sorbite to meet the requirement of workability and surface quality for various dies.

Key words: Die Steel 718, Heavy Plate, Production Process, Structure, Hardness