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 ›› 2009, Vol. 30 ›› Issue (2): 61-62.

• 组织和性能 • 上一篇    下一篇

固溶温度对超级双相不锈钢S32750板材组织和耐蚀性的影响

李国平,李俊,张威,范新智   

  1. 太原钢铁(集团)有限公司,太原 030003
  • 收稿日期:2008-09-25 出版日期:2009-04-01 发布日期:2022-12-05
  • 作者简介:李国平(1975-),男,高级工程师,1995年内蒙占科技大学毕业,从事不锈钢新产品、新工艺的研究。

Influence of Solution Temperature on Structure and Corrosion Resistance of Plate of Super Duplex Stainless Steel S32750

Li Guoping , Li Jun , Zhang Wei , Fan Xinzhi   

  1. Taiyuan Iron and Steel(Group)Co Ltd , Taiyuan 030003
  • Received:2008-09-25 Published:2009-04-01 Online:2022-12-05

摘要: 研究了920~1100℃固溶处理温度对S32750钢中板(%:0.022C、25.35Cr、7.17 Ni、4.05Mo、0.28N)组织和6%FeCl3+0.05NHCl溶液耐蚀性的影响。结果表明,≤1000℃固溶处理时,钢中析出脆性σ-相,铁素体含量≤11%,钢的硬度增加,钢的塑性、韧性和耐蚀性急剧下降,于1050~1100℃固溶处理,钢中组织为46%~47%铁素体+奥氏体组织,具有良好的综合力学性能和高的耐蚀性。

关键词: 超级双相不锈钢S32750, 固溶温度, 组织, 耐蚀性

Abstract: Influence of solution-treated temperature at 920~1100 ℃ on structure and corrosion resistance of medium plate of steel S32750(%:0.022C,25.35Cr,7.17Ni,4.05Mo,0.28N)in 6%FeCl3+0.05NHCl liquor has been studied. The results showed that with solution-treated at ≤ 1000 ℃,the σ-phase precipitated in steel,the ferrite content in structure was ≤11%,the hardness of steel increased and the plasticity,toughness and corrosion resistance of steel rapidly decreased;and with solution-treated at 1050~1100 ℃,the structure of steel was 46%~47% ferrite +austenite,it had excellent comprehensive mechanical properties and corrosion resistance.

Key words: Super Duplex Stainless Steel S32750, Solution Temperature, Structure, Corrosion Resistance