STUDY ON MICROSTRUCTURE PROPERTY AND HEAT TREATMENT PROCESS OF 12% Cr HEAT-RESISTING STEEL USED IN POWER PLANTS

LIU Shutao; ZHENG Fangping; CHEN Jigang; TANG Liying; WANG Caixia Xi'an Thermal Power Research Institute Co Ltd

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STUDY ON MICROSTRUCTURE PROPERTY AND HEAT TREATMENT PROCESS OF 12% Cr HEAT-RESISTING STEEL USED IN POWER PLANTS

更新时间：2025-09-28

- STUDY ON MICROSTRUCTURE PROPERTY AND HEAT TREATMENT PROCESS OF 12% Cr HEAT-RESISTING STEEL USED IN POWER PLANTS
- Thermal Power Generation Vol. 39, Issue 7, Pages: 36-39(2010)
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TG161
- Published：2010
- 稿件说明：
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LIU Shutao, ZHENG Fangping, CHEN Jigang, et al. STUDY ON MICROSTRUCTURE PROPERTY AND HEAT TREATMENT PROCESS OF 12% Cr HEAT-RESISTING STEEL USED IN POWER PLANTS[J]. Thermal power generation, 2010, 39(7): 36-39.
DOI：

LIU Shutao, ZHENG Fangping, CHEN Jigang, et al. STUDY ON MICROSTRUCTURE PROPERTY AND HEAT TREATMENT PROCESS OF 12% Cr HEAT-RESISTING STEEL USED IN POWER PLANTS[J]. Thermal power generation, 2010, 39(7): 36-39. DOI：

摘要

通过对电站用12%Cr型马氏体耐热钢不同工艺热处理的组织性能研究表明

正火(1 020～1 070℃×1 h)+回火(760℃×2 h)或高温退火(1 050℃×1 h)+回火(760℃×2 h)工艺热处理后的组织为板条马氏体

硬度在CSN417134—1977要求范围内;等温退火(1 050℃×1 h→670℃、750℃、870℃)+回火(760℃×2 h)工艺热处理后的组织为板条马氏体+珠光体

硬度在标准要求范围内;不完全退火(850℃、870℃)工艺热处理后会得到深浅二区域组织

其中深色区域为颗粒状珠光体

浅色区域为铁素体+碳化物

并且试样的硬度低于标准要求的下限值。

Abstract

The study on microstructure properties of 12% Cr martensite heat-resisting steel with different heat treatment process shows that the microstructure of said steel after heat treatment proces of normalizing(1 020～1 070 ℃×1 h) + tempering(760 ℃×2 h) or high-temperature annealing(1 050 ℃×1 h) + tempering(760 ℃×2 h) is lath-shaped martensite

and its hardness is in the range of standard;while after heat treatment process of isotermal annealing(1 050 ℃×1 h→670 ℃

750 ℃

870 ℃) +tempering(760 ℃×2 h)

the microstructure of said steel is lath-shaped matensite + pearlite

and its hardness is also in the range of standard;the microstructure of said steel after heat treatment process of not fully annealing(850 ℃

870 ℃) has two regions with different colors

in which the dark-colored region is granular pearlite

the light-colored region is ferrite + carbide

and the hardness of speciemens is less than the lower limit required in standard.

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