Effect of Breakdown Process on Surface Cracking of Billet of Free Cutting Austenite Stainless Steel

李壮; 吴迪; 齐瑞贵

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Effect of Breakdown Process on Surface Cracking of Billet of Free Cutting Austenite Stainless Steel

更新时间：2026-01-21

- Effect of Breakdown Process on Surface Cracking of Billet of Free Cutting Austenite Stainless Steel
- Special Steel Vol. 29, Issue 1, Pages: 37-39(2008)
- 作者机构：
  
  1. 东北大学轧制技术及连轧自动化国家重点实验室,沈阳,110004
  2. 沈阳航空工业学院材料工程系,沈阳,110034
  3. 沈阳航空工业学院机械与汽车学院,沈阳,110034
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：16 July 2007，
  
  Online First：14 December 2022，
  
  Published：14 December 2008
- 稿件说明：
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李壮, 吴迪, 齐瑞贵. Effect of Breakdown Process on Surface Cracking of Billet of Free Cutting Austenite Stainless Steel[J]. Special Steel, 2008, 29(1): 37-39.
DOI：

李壮, 吴迪, 齐瑞贵. Effect of Breakdown Process on Surface Cracking of Billet of Free Cutting Austenite Stainless Steel[J]. Special Steel, 2008, 29(1): 37-39. DOI：

摘要

易切削奥氏体不锈钢(%:0.09～0.10C、0.80～0.82Si、0.40～0.43Mn、0.08～0.09P、0.10～0.11S、9.14～9.20Ni、18.12～18.30Cr、0.73～0.78Ti)由30 kg真空感应炉冶炼

Φ450 mm轧机经8道次开坯成75 mm×75 mm坯。当钢锭加热温度1200℃

1～4道次(1150～1060℃)轧制未出现开裂

5～8道次(950～770℃)轧制钢坯出现严重表面裂纹。扫描电镜与能谱分析表明

钢中夹杂物为硫化锰-硫化铁复合夹杂物。通过将1～8道次开坯温度控制在1150～1060℃时

有效地避免了钢坯表面开裂的发生。

Abstract

The free cutting austenite stainless steel(0.09~0. 10C

0.80~0.82Si

0.40~0.43Mn

0.08~0.09P

0. 10~0. 11S

9. 14~9.20Ni

18.12～18.30Cr

0.73~0.78Ti)was melted by a 30 kg vacuum induction furnace and broken down to75 mm×75 mm billet with8 pass by a φ450 mm mill.As steel ingot was heated to 1200 ℃ and rolled at 1150~1060℃ in1~4 pass there was not cracking on billet surface but continuously rolled at 950~770 ℃ in 5~8 pass the serious surface cracking of billet occurred. The SEM analysis results indicated that inclusion in steel was mainly manga- nese sulphide - iron sulphide compounded inclusions.The steel billet cracking has been effectively avoided by controlling breakdown with1~8 pass at 1150~1060 ℃.

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