超低氢高韧性CJ807RH焊条的研制

Development of CJ807RH electrode with low hydrogen high toughness

从合金配比、工艺调整、金相组织、韧脆转变曲线、扩散氢控制等方面介绍了一种高强度、高韧性、超低氢焊条CJ807RH的研制过程及其力学性能。控制w(CaCO3)/w(CaF2)比例来得到良好的焊接操作工艺;控制w(Mn)/w(Si)、w(Mn)/w(Ni),向焊缝中过渡微量的稀土元素以及尽量降低焊缝中的S、P含量,提高焊缝金属的低温冲击韧性;不加入含结晶水的物质和提高碳酸盐、氟化物的比例来降低熔敷金属扩散氢含量;通过金相组织、韧脆转变曲线验证该焊条具有良好的低温冲击韧性;通过小铁研(斜Y)试验验证该焊条具有良好的抗裂性;通过水银法测得扩散氢验证其是否为超低氢。经过大量试验研制出超低氢高韧性CJ807RH焊条。

This article from the alloy ratio,welding technology adjustments,microstructure,ductile brittle transition curve,[H] control etc.to introduce the high strength,high toughness,low hydrogen electrode of CJ807RH and its mechanical properties.Control the ratio of w（CaCO3）/w（CaF2） to get a good welding operation.Control the ratio of w（Mn）/w（Si）,w（Mn）/w（Ni）,the small amount of Re in the weld metal and decrease S,P content,to Improve low temperature impact toughness of weld metal,not add substances containing crystal water and improve the carbonate,fluoride content to reduce the hydrogen content of deposited metal.Through the microstructure,ductile-brittle transition curves verify,we know that the electrode has good low temperature impact toughness,Y-slit type cracking test experimental verification of the electrode has good crack resistance,[H]measured by mercury verify the ultra-low hydrogen hydrogen,After a lot of tests developed the CJ807RH electrode with ultra-low hydrogen and high toughness.