Effect of Heat Treatment on Structure, Hardness and Aging Kinetics of Plastic Die Steel NAK80

孙国栋; 刘长华; 宋勇秉; 杨先啓

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Effect of Heat Treatment on Structure, Hardness and Aging Kinetics of Plastic Die Steel NAK80

更新时间：2026-01-21

- Effect of Heat Treatment on Structure, Hardness and Aging Kinetics of Plastic Die Steel NAK80
- Special Steel Vol. 39, Issue 2, Pages: 60-64(2018)
- 作者机构：
  
  1. 九江学院机械与材料工程学院,九江,332005
  2. 江西省表面绿色再制造工程技术中心,九江学院,九江,332005
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：10 October 2017，
  
  Online First：04 July 2022，
  
  Published：04 July 2018
- 稿件说明：
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孙国栋, 刘长华, 宋勇秉, et al. Effect of Heat Treatment on Structure, Hardness and Aging Kinetics of Plastic Die Steel NAK80[J]. Special Steel, 2018, 39(2): 60-64.
DOI：

孙国栋, 刘长华, 宋勇秉, et al. Effect of Heat Treatment on Structure, Hardness and Aging Kinetics of Plastic Die Steel NAK80[J]. Special Steel, 2018, 39(2): 60-64. DOI：

摘要

试验了830~910℃固溶处理和480~540℃时效对Φ20mm NAK80塑料模具钢（/%:0.15C

0.30Si

1.50Mn

3.00Ni

1.00Cu

1.00Al

0.30Mo

0.30Cr）组织和硬度的影响

并对其时效动力学行为进行了研究。结果表明

890℃固溶处理后

NAK80钢组织由板条马氏体和粒状贝氏体组成

HRC硬度值达到42.4

经过500℃保温4 h的时效处理后

该钢的组织为回火屈氏体和析出相

其HRC硬度值可达45.5。利用JMA方程得到480℃和500℃时效时的Avrami指数n分别为2.20和1.63

表观激活能为96.787J/mol。

Abstract

The effect of solid solution treatment at 830~910°C and aging at 480~540°C on structure and hardness of Φ20mm plastic die steel NAK80 (/%: 0.15C

0.30Si

1.50Mn

3.00Ni

1.00Cu

1.00Al

0.30Mo

0.30Cr) is tested and its aging kinetics behavior has been studied. Results show that after solid solution at 890℃，the structure of steel NAK80 is lath martensite and granular bainite

the HRC hardness value is up to 42.4

and with aging at 500℃ for 4h

the structure of steel is tempered troostite and precipitated phase

its HRC hardness value is up to 45.5. With calculating by using JMA equation it is obtained that the Avrami indexes n of steel aged at 480°C and 500°C are respectively 2.20 and 1.63

and the apparent activation energy is 96.787J/mol.

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