吉林大学学报(工学版) ›› 2022, Vol. 52 ›› Issue (6): 1301-1307.doi: 10.13229/j.cnki.jdxbgxb20210073

• 材料科学与工程 • 上一篇    

新型5Cr5MoV模具钢修复性能

梁言1(),王强2,宋雨来1(),刘耀辉1   

  1. 1.吉林大学 材料科学与工程学院,长春 130022
    2.中国科学院金属研究所,沈阳 110016
  • 收稿日期:2021-04-06 出版日期:2022-06-01 发布日期:2022-06-02
  • 通讯作者: 宋雨来 E-mail:clark7998@163.com;ylsong@jlu.edu.cn
  • 作者简介:梁言(1989-),男,博士研究生. 研究方向:金属热处理,堆焊修复. E-mail:clark7998@163.com
  • 基金资助:
    吉林省重大科技专项项目(20210301019GX)

Performance of repaired 5Cr5MoV die steel

Yan LIANG1(),Qiang WANG2,Yu-lai SONG1(),Yao-hui LIU1   

  1. 1.College of Materials Science and Engineering,Jilin University,Changchun 130022,China
    2.Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China
  • Received:2021-04-06 Online:2022-06-01 Published:2022-06-02
  • Contact: Yu-lai SONG E-mail:clark7998@163.com;ylsong@jlu.edu.cn

摘要:

采用新设计的圆坑修复法对5Cr5MoV冷作模具钢开展了修复试验,并采用扫描电子显微镜(SEM)对修复区微观组织进行了表征,绘制了修复区显微硬度分布图。基于修复区最大硬度、最小硬度和基体硬度,提出了铸造模具钢的修复效果评价参数—波动系数n。试验结果表明:圆坑直径为20 mm时,修复效果最佳。

关键词: 材料加工工程, 冷作模具钢, 5Cr5MoV, 铸造缺陷, 圆坑修复法, 显微硬度, 波动系数

Abstract:

A new round pit repair method was designed to repair 5Cr5MoV cold working die steel. Microstructure in the repaired zone was characterized by scanning electron microscope(SEM), and the microhardness distribution map of the repaired zone was drawn. a new evaluation parameter, fluctuation coefficient (n), for evaluating the repair effect was proposed, based on the maximum hardness, minimum hardness and matrix hardness of the repaired zone. The results show that when the pit diameter is 20 mm, the repair effect is the best.

Key words: materials processing engineering, cold working die steel, 5Cr5MoV, casting defect, round pit repairing method, microhardness, fluctuation coefficient

中图分类号: 

  • TG455

图1

模具钢表面的铸造缺陷"

图2

圆坑修复样品的取样位置和尺寸"

图3

样品示意图"

图4

修复区表面的显微硬度分布"

图5

修复区表面退火后的显微硬度分布"

表1

修复后圆坑的显微硬度特征"

圆坑直径/mmHVmatrixHVmaxHVminHVmax-HVminn
106007805362440.32
206006505081420.17
306006825131690.20

表2

退火后圆坑的显微硬度特征"

圆坑直径/mmHVmatrixHVmaxHVminHVmax-HVminn
10260318246720.23
20260292253390.13
30260301233680.19

图6

修复样品退火后的工程应力-应变曲线"

图7

不同尺寸圆坑直径修复板下拉伸试样的断裂形态"

图8

不同圆坑直径从修复板切下的样品的显微组织"

图9

不同圆坑直径从修复板切下退火后的样品的显微组织"

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