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超低碳贝氏体(ULCB)焊接材料的研究进展
薛小怀, 钱百年, 国旭明, 于少飞, 单以银
中国科学院金属研究所, 沈阳 110016
摘要:
介绍了超低碳贝氏体(ULCB)焊接材料产生的背景、超低碳贝氏体焊缝强韧化机制和冶金理论,还介绍了影响超低碳贝氏体焊缝性能的因素、以及使用该焊接材料时需要解决的问题。文中指出,虽然ULCB焊接材料具有优异的性能,但是焊接方法的选取和保护气氛的选择,对焊缝的性能有很大的影响。焊缝组织和硬度对冷却速率不敏感。最后指出ULCB焊接材料的广泛应用必须解决生产效率问题,通过控制夹杂物大小和消除柱状晶进一步改善焊缝的韧性。
关键词:  超低碳贝氏体(ULCB)  焊接材料  强韧化机制
DOI:
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基金项目:国家973基金资助项目(G1998061511)
Development in the Research of Ultra Low Carbon Bainitic(ULCB) Welding Consumables
XUE Xiao-huai, QIAN Bai-nian, GUO Xu-ming, YU Shao-fei, SHAN Yi-yin
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
Abstract:
This paper reviews the generation background and toughening and strengthening mechanism of the Ultra low Carbon Baninitic (ULCB) welding consumables, together with the effecting factors on the properties of weld metals. both of the shielding gas and the welding process play an important role in the toughness of ULCB weld metals. Microstructuresand hardness are insusceptibility to the cooling rates. The productivity should be settled when this consumables are extensively applicated to industrial production. The properties will increase tremendously if efforts are made to control the size of the oxygen inclusions and destroy columnar grain structure in the weld metals.
Key words:  ultra low carbon baninitic (ULCB)  welding consumables  toughening and strengthening mechanism