Formation Mechanism and Structure Evolution of Austenitic Stainless Steel 304 during Solidification with Near-Rapid Rates

申丽娟; 邢淑清; 麻永林; 白亮; 李德发; 李建飞

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Formation Mechanism and Structure Evolution of Austenitic Stainless Steel 304 during Solidification with Near-Rapid Rates

更新时间：2026-01-21

- Formation Mechanism and Structure Evolution of Austenitic Stainless Steel 304 during Solidification with Near-Rapid Rates
- Special Steel Vol. 33, Issue 4, Pages: 53-56(2012)
- 作者机构：
  
  1. 内蒙古科技大学材料与冶金学院,包头,014010
  2. 济源钢铁集团公司,济源,459000
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：19 January 2012，
  
  Online First：25 October 2022，
  
  Published：25 October 2012
- 稿件说明：
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申丽娟, 邢淑清, 麻永林, et al. Formation Mechanism and Structure Evolution of Austenitic Stainless Steel 304 during Solidification with Near-Rapid Rates[J]. Special Steel, 2012, 33(4): 53-56.
DOI：

申丽娟, 邢淑清, 麻永林, et al. Formation Mechanism and Structure Evolution of Austenitic Stainless Steel 304 during Solidification with Near-Rapid Rates[J]. Special Steel, 2012, 33(4): 53-56. DOI：

摘要

通过感应炉熔化的304钢(/%:0.053C、0.55Si、1.50Mn、0.030P、0.002S、17.02Cr、8.01 Ni、0.50Cu、0.08Mo)直接浇铸在水冷铜模上得到厚7 mm直径25 mm的圆形试样

研究了Cr、当量/Ni当量和1.5～1 000℃/s的冷却速率对奥氏体不锈钢铸态凝固组织形态和分布的影响。结果表明

随冷却速率增加至75～90℃/s

该钢的凝固模式由FA(铁素体-奥氏体)模式向AF(奥氏体-铁素体)模式转变

初生相由枝晶铁素体转变成枝晶奥氏体

但冷却为～1 000℃/s时

观察到块状铁素体组织

并且枝晶状奥氏体转变成胞状奥氏体。

Abstract

The effect of Creq/Nieq and cooling rate (1.5 ~ 1 000 Y/s) on structure morphology and distribution of as- cast solidification structure of austenite stainless steel 304 (/% : 0. 053C

0. 55Si

1. 50Mn

0. 030P

0. 002S

17. 02Cr

8. 01 Ni

0. 50Cu

0. 08Mo) is studied by induction furnace melting the steel and direct-casting on a water-cooling copper mold to get a sample with 7 mm thickness and 25 mm diameter. Results show that with increasing cooling rate to 75 ~ 90 ℃/s

the primary solidification mode of steel transferred from FA (ferrite-austenite) mode to AF (austenite-ferrite) mode

the primary phase is modified from dendritic ferrite to dendritic austenite

as the cooling rate is - 1 000℃/s

the blocky ferrite structure is observed

and the dendritic austenite is replaced by cellular austenite.

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