Application of Thermo-Calc Software during Solidification Process of Super Duplex Stainless Steel S32760

王哨兵; 周珠; 孙文强; 陈登武; 李光恒; 曹萍

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Application of Thermo-Calc Software during Solidification Process of Super Duplex Stainless Steel S32760

更新时间：2026-01-21

- Application of Thermo-Calc Software during Solidification Process of Super Duplex Stainless Steel S32760
- Special Steel Vol. 41, Issue 3, Pages: 15-19(2020)
- 作者机构：
  
  浙江久立特材科技股份有限公司,湖州,313000
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：19 December 2019，
  
  Online First：24 April 2022，
  
  Published：24 April 2020
- 稿件说明：
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王哨兵, 周珠, 孙文强, et al. Application of Thermo-Calc Software during Solidification Process of Super Duplex Stainless Steel S32760[J]. Special Steel, 2020, 41(3): 15-19.
DOI：

王哨兵, 周珠, 孙文强, et al. Application of Thermo-Calc Software during Solidification Process of Super Duplex Stainless Steel S32760[J]. Special Steel, 2020, 41(3): 15-19. DOI：

摘要

利用Thermo-Calc热力学计算软件得到S32760（022Cr25Ni7Mo3WCuN）超级双相不锈钢凝固过程中的相图

确定了S32760双相钢是FA （铁素体-奥氏体）凝固模式

通过改变奥氏体和铁素体的形成元素的含量

确定在不同的化学成分下的热加工性能、Cr

N和σ相析出温度

得到S32760双相钢热加工温度区间随着奥氏体形成元素C、N、Ni、Mn含量的增加而变大

随着铁素体形成元素Si、Cr、Mo含量的增加而减小

而W对热加工性能没有影响。根据热力学计算

确定了最优的化学成分（/%:0.022C

0.30Si

0.80Mn

25.60Cr

6.20Ni

0.54Cu

3.50Mo

0.54W

0.27N）

S32760双相钢最佳热塑性温度为1195℃

N相的析出温度为1050℃

σ相析出温度为1020℃

热加工区间为145℃

并且通过了后续的现场实践验证。

Abstract

The phase diagram of S32760 (022Cr25Ni7Mo3WCuN) super duplex stainless steel during solidification process is determined by Thermo-Calc thermodynamic calculation software

and the solidification mode of S32760 duplex steel is FA (Ferrite-Austenite). By changing the content of austenite and ferrite fanning elements and the different chemical compositions to determine the hot working properties、 Cr

N and ct phase precipitation temperatures

the hot working temperature range of S32760 is enlarged with increasing the content of austenite forming elements C、N、Ni and Mn

and reduced with increasing the content of ferrite forming elements Si、Cr and Mo

however W has no effect on hot working performance. According to the therm

odynamic calculation

the optimal chemical composition (/%：0.022C

0.30Si

0.80Mn

25.60Cr

6.20Ni

0.54Cu

3.50Mo

0.54W

0.27N) is determined. The optimal thermoplastic temperature of duplex steel S32760 is 1195;℃

the precipitation temperature of Cr

N phase is1050

℃

andthe precipitation temperature of

phase is 1020 ℃;

and the hot working range is 145°C

which has been verified by subsequent production practice.

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