ISSN:1003-8620

CN:42-1243/TF

Governed by: CITIC Pacific Special Steel Group Co., LTD

Sponsored by: Daye Special Steel Co., LTD.

Special Steel ›› 2006, Vol. 27 ›› Issue (6): 34-36.

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New Die Steel W4Mo3Cr4VRE Smelting by using High Speed Steel Filings of Grinding DRI

Yuan  Shouqian,Lian  Wenjing,Zhong  Qingwen,Zhang  Ting   

  1. School of Metallurgy and Engineering,Xi'an University of Architecture and Technology,Xi'an 710055
  • Received:2006-05-06 Online:2006-11-01 Published:2023-03-02

高速钢磨屑直接还原铁冶炼新型模具钢W4Mo3Cr4VRE

袁守谦,连文敬,钟庆文,张艇   

  1. 西安建筑科技大学冶金工程学院,西安710055

  • 作者简介:袁守谦(1950-),男,教授,从事特钢新技术和铁合金冶炼新 技术研究。
  • 基金资助:
    特耐制品生产用高性能模具“九五”攻关项目(96- 2E01- 19)

Abstract: A new die steel W4Mo3Cr4VRE(0.78~0.88C,3.50~4.50W,2.50~3.50Mo,3.80~4.40Cr, 1. 10~1.60V,0.15~0.25RE)was    smelted   by   using   high    speed    steel    filings    of   grinding   DRI(sponge    iron    0.44C-  4.62W-3.27Mo-2.20Cr-0.98V)with   definite   amount   scrap   of   high   speed   steel   turnings(0.87C-3.50W- 1.30Mo- 1.50Cr- 0.60V)in  a  250  kg  induction  furnace  and refined by  ESR.  Examination  results  showed  that with  1180℃ quenched  +  250 ℃  double  tempered  the  HRC  hardness  value  of ESR  steel  was  ≥60,toughness  impact  ≥49  J/cm²,and  with  1150  ℃  or  1180℃ quenched +  560℃ double tempered,the HRC hardness value of ESR  steel was up to  66.The  study results confirm  that it is available to recover and reuse the filings of grinding by magnetic  separation,direct reduction and electric furnace  melting,and the produced new die steel can meet the requirement of application performance of refractory products die.

Key words: High Speed Steel Filings of Grinding, DRI, Die Steel W4Mo3Cr4VRE

摘要: 在250kg感应炉,利用高速钢磨屑直接还原铁(海绵铁%:0.44C-4.62W-3.27Mo-2.2Cr-0.98V),配加一定含量高速钢车屑废钢(%:0.87C-3.50W-1.30Mo-1.50Cr-0.60V),冶炼成一种新型模具钢W4Mo3Cr4VRE(%:0.78~0.88C、3.50~4.50W、2.50~3.50Mo、3.80~4.40Cr、1.10~1.60V、0.15~0.25RE)再经电渣重熔。检验结果表明,电渣重熔后,该钢1180℃淬火+250℃2次回火,HRC硬度值≥60,冲击韧性≥49J/cm2;当1150℃或1180℃淬火+560℃2次回火时,其HRC硬度值达66。该实验结果证实了采用精选、还原烧结、电炉配料的冶炼工艺对磨屑的回收利用是可行的,生产的新型钢能满足耐火制品模具使用性能的要求。

关键词:  , 高速钢磨屑 , 直接还原, W4Mo3Cr4VRE 模具钢