| 重载冷挤压模具用LD钢热加工工艺探讨 |
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| 引用本文： | 周重光,贺勇,周蒙蛟,沈国盛,孙强,余宗宝. 重载冷挤压模具用LD钢热加工工艺探讨[J]. 兵器材料科学与工程, 2009, 32(2) |
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| 作者姓名： | 周重光 贺勇 周蒙蛟 沈国盛 孙强 余宗宝 |
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| 作者单位： | 中国兵器科学研究院宁波分院,浙江,宁波,315103;西南交通大学四川,成都,610031;慈溪市龙山汽配有限公司浙江,慈溪,315311 |
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| 摘 要： | 对重载冷挤压模具用LD钢在实际生产使用中热加工出现的问题和解决方法作了工艺研究探讨。研究采用高低倍组织观察,常规力学性能测试和断口观察分析不同状态下材料的组织变化。通过对材料的冶金质量分析,证实引起重载冷挤压模具开裂的主要原因是粗大共晶碳化物。通过电渣重熔+锻造+球化退火热加工工艺有效改善材料的冶金质量,细化和减少共晶碳化物,增加模具淬火状态下的合金固溶含量,回火过程中Cr、Mo、V碳化物的稳定弥散析出,提高了模具的抗压强度和韧性。
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| 关 键 词： | LD钢 电渣重熔 锻造 球化退火 共品碳化物 |
Investigation on hot working processes of LD steel for heavy-loaded cold extrusion moulds |
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| ZHOU Chongguang,HE Yong,ZHOU Mengjiao,SHEN Guosheng,SUN Qiang,YU Zongbao. Investigation on hot working processes of LD steel for heavy-loaded cold extrusion moulds[J]. Ordnance Material Science and Engineering, 2009, 32(2) |
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| Authors: | ZHOU Chongguang HE Yong ZHOU Mengjiao SHEN Guosheng SUN Qiang YU Zongbao |
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| Affiliation: | 1.Ningbo Branch of China Academy of Ordnance Science;Ningbo 315103;China;2.Southwest Jiaotong University 610031;3.Cixi Longshan Automobile Part Limited Company;Ningbo 315311;China |
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| Abstract: | Technique problems appeared in producing LD steel for heavy- loaded cold extrusion moulds and service period,and its solving method were studied. Metallurgical quality analysis proved that the main factor leading to cracking of the moulds was big eutectic carbide particles.Hot working processes such as electroslag remelting, forging and spheroidizing annealing,could improve metallurgical quality of material, reduce and refine eutectic carbide, as well as increase solid solution quantity in quenching mould. ... |
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| Keywords: | LD steel electroslag remelting forging spheroidizing annealing eutectic carbide |
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