机械制造文摘
一焊接分册
12Cr1MoV钢用高韧性焊条的开发及应用
罗永飞'李昊”
（1.东方电气集团东方锅炉股份有限公司，四川成都611731； 2.四川大西洋焊接材料股份有限公司，四川自贡643010）
焊接现场
摘要：低合金耐热钢12CrlMoV焊接预热温度高，给生产应用带来不便，为解决此间题，提出了一种12Cr1MoV用新型焊条，焊条成分设计中采用低碳加钨的方式解决强度与韧性的匹配间题。对焊条进行试验验证，试验结果显示焊
超过8mm以上的12CrlMoV耐热钢焊接可不预热，且不需要后热消氢。该焊条已在产品生产中得到应用，具有较好的推广价值。
关键词：新型；焊条；低碳加钨；强韧性中图分类号：TC422
Manufactureandappliedresearchofhightoughnesswelding
electrodeR317WHRfor12Cr1MoVsteel
Luo Yongfei',Li Hao
(1. Dongfang Boiler Group Co. ,Lid. ,Chengdu 611731,China;
2.Atlantic Sichuan welding material Co.,Ltd.,Zigong 643010,Sichuan,China)
Abstract: The welding preheating temperature of 12CrlMoV low alloy heat resistant steel is high, which brings the inconvenience to fabrication. A new type of welding electrode is proposed for 12Crl MoV heat resist-ant steel, which contains low carbon plus tungsten to realize the proper match between strength and toughness. The results of the tests conducted for such kind of electrode show that 1) the electrode's mechanical properties at room temperature and creep rupture strength are equivalent with those of 12Crl MoV heat resistant steel; 2) the electrode has high crack resistance property, leading to such advantage that welding of 12Crl MoV heat re-sistant steel (thickness more than 8 mm) with this kind of electrode under room temperature (20°C ) requires no aaaoeaoea and it is worth of popularizing
Key words: new type; electrode; low carbon and tungsten; strength and toughness
0前言
随着燃煤发电锅炉参数和容量的不断提升，锅炉用低合金耐热钢管12CrlMoV壁厚随之不断增加，特别是集箱简身用管最厚已达到145mm。此外，集箱筒身
万方数据
布满大小管接头后耳板等承压承力件，进一步加剧了集箱角焊缝的拘束度。高拘束度厚壁集箱角焊缝焊接面临诸多问题，而焊接冷裂纹的间题尤为显著。工程中焊接冷裂纹问题的主要是通过预热来解决， 12Cr1MoVG材料有标准推荐预热温度不小于120℃，
2016年第3期37