Effect of Thermal Deformation on Microhardness and Structure of High Nitrogen Austenite Stainless Steel Mn18Cr18N

徐国富; 李晓源; 时捷

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Effect of Thermal Deformation on Microhardness and Structure of High Nitrogen Austenite Stainless Steel Mn18Cr18N

更新时间：2026-01-21

- Effect of Thermal Deformation on Microhardness and Structure of High Nitrogen Austenite Stainless Steel Mn18Cr18N
- Special Steel Vol. 34, Issue 2, Pages: 68-70(2013)
- 作者机构：
  
  1. 华中科技大学材料科学与工程学院,武汉,430074
  2. 钢铁研究总院特殊钢研究所,北京,100081
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：02 November 2012，
  
  Online First：08 October 2022，
  
  Published：08 October 2013
- 稿件说明：
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徐国富, 李晓源, 时捷. Effect of Thermal Deformation on Microhardness and Structure of High Nitrogen Austenite Stainless Steel Mn18Cr18N[J]. Special Steel, 2013, 34(2): 68-70.
DOI：

徐国富, 李晓源, 时捷. Effect of Thermal Deformation on Microhardness and Structure of High Nitrogen Austenite Stainless Steel Mn18Cr18N[J]. Special Steel, 2013, 34(2): 68-70. DOI：

摘要

试验用Mn18Cr18N钢(/%:0.03C、19.25Cr、17.96Mn、0.59N)经100 kg加压真空感应炉冶炼

锻造开坯并轧成12 mm板。用Gleeble 3800热模拟机研究了温度(750～1150℃)和变形(15%～60%)对Mn18Cr18N高氮钢显微硬度和组织的影响

并得高氮钢的再结晶图。试验结果显示

处于未再结晶区时高氮钢Mn18Cr18N的显微硬度随着变形温度升高缓慢下降

部分再结晶区时快速下降

完全再结晶区时又缓慢下降;在完全再结晶区时

细晶强化是试验钢主要强化方式

显微硬度与晶粒尺寸符合Hall-Petch经验公式;在未再结晶区时

应变强化是主要强化方式;未再结晶区变形强化效果要明显高于再结晶区。

Abstract

The test steel Mn18Cr18N (0.03C

19.25Cr

17.96Mn

0.59N) is melted by an 100 kg pressured vacuum induction furnace

forged breakdown and rolled to 12mm plate. With using Gleeble 3800 thermal simulation machine the effect of temperature (750-1150 ℃) and deformation (15%-60%) on microhardness and structure of high nitrogen steel Mnl8Crl8N is studied to get a recrystallization diagram of the high nitrogen steel. Test results show that in non-crystallization region with increasing temperature at definite strain

the microhardness of high nitrogen steel Mn18Cr18N decreases slowly

but decreases quickly in part-recrystallization region

finally again decreases slowly in complete recrystallization region ； in complete recrystallization region the main strengthening mechanism is grain refining strengthening and the microhardness value and average grain size are in accordance with Hall-Petch experienced formula ； in non-recrystallization region the strain strengthening is major strengthening mechanism ； and the effect of strain strengthening in non-crystallization region is higher than that in recrystallization region.

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