挤压锻温度对固态再生H11钢组织和性能的影响

doi:10.12068/j.issn.1005-3026.2020.10.005

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (10): 1394-1401.DOI: 10.12068/j.issn.1005-3026.2020.10.005

挤压锻温度对固态再生H11钢组织和性能的影响

刘兴刚¹，王亚琴¹，马召俊²，张德良¹

(1.东北大学材料科学与工程学院，辽宁沈阳110819； 2.歌尔股份有限公司，山东潍坊261000)

收稿日期:2020-04-07 修回日期:2020-04-07 出版日期:2020-10-15 发布日期:2020-10-20
通讯作者: 刘兴刚
作者简介:刘兴刚(1967-)，男，甘肃会宁人，东北大学副教授; 张德良(1964-)，男，黑龙江兰西人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51874080).

Effect of Extrusion-Forging Temperature on Microstructure and Mechanical Properties of Solid State Regenerated H11 Steel

LIU Xing-gang¹， WANG Ya-qin¹， MA Zhao-jun²， ZHANG De-liang¹

1.School of Materials Science & Engineering， Northeastern University， Shenyang 110819， China; 2. Goertek Co.， Ltd.， Weifang 261000， China.

Received:2020-04-07 Revised:2020-04-07 Online:2020-10-15 Published:2020-10-20
Contact: WANG Ya-qin
About author:-
Supported by:
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摘要/Abstract

摘要： 以回收的H11钢车削屑获得的粉末为原料，利用粉末压坯和挤压锻工艺制备样品，并结合拉伸实验、硬度测试、XRD，SEM，TEM等分析手段，研究了1100~1220℃不同挤压锻温度对固态再生H11钢组织结构和力学性能的影响. 结果表明:样品固结效果良好；挤压锻温度为1220℃时，材料密度可达95.8 %；挤压锻温度达到1140℃后，基体中析出Fe₇C₃相；随着挤压锻温度从1100℃升高至1220℃，沿挤压方向的硬度从2.5GPa增加至4.4GPa，抗拉强度从451MPa增加至808MPa，但延伸率从3.1 %降低至0.7 %.

关键词: H11钢, 挤压锻温度, 热作模具钢, 固态再生, 车削屑

Abstract: Using the powders from the recovered machining chips of H11 steel as raw materials， the samples were prepared by powder compacting and extrusion-forging processes. Using tensile test， hardness test， XRD， SEM， TEM and etc.， the effects of different extrusion-forging temperatures in a range of 1100~1220℃ on the microstructure and mechanical properties of solid regenerated H11 steel were studied. The results show that the sample has a good consolidation effect. When the extrusion-forging temperature is 1220℃， the density of the sample can reach up to 95.8%. After the temperature is over 1140℃， the Fe₇C₃ phase precipitates in the matrix. With increasing extrusion-forging temperature from 1100℃ to 1220℃， the hardness along the extrusion direction increases from 2.5GPa to 4.4GPa and the tensile strength increases from 451MPa to 808MPa， while the elongation decreases from 3.1% to 0.7%.

Key words: H11 steel, extrusion-forging temperature, thermal die steel, solid state regeneration, turning chips

中图分类号:

TF763.2

刘兴刚，王亚琴，马召俊，张德良. 挤压锻温度对固态再生H11钢组织和性能的影响[J]. 东北大学学报:自然科学版, 2020, 41(10): 1394-1401.

LIU Xing-gang， WANG Ya-qin， MA Zhao-jun， ZHANG De-liang. Effect of Extrusion-Forging Temperature on Microstructure and Mechanical Properties of Solid State Regenerated H11 Steel[J]. Journal of Northeastern University Natural Science, 2020, 41(10): 1394-1401.

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挤压锻温度对固态再生H11钢组织和性能的影响

Effect of Extrusion-Forging Temperature on Microstructure and Mechanical Properties of Solid State Regenerated H11 Steel

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