【摘要】 通过在药皮中添加稀土合金的试验，研究了稀土对高钒焊条焊补铸铁接头组织与硬度的影响。结果表明，熔合区的硬度与该处碳化物的析出数量有关。在此基础上确定的最佳稀土剂含量约为药皮干粉重量的６％。更多还原

【Abstract】 The influence of RE on the microstructure and hardness of welded joint was studied by the experiments adding RE in electrode covering. The results show that the hardness has relation to vanadium carbides distributing along fusion boundary. Based on the tests,the optimum content of RE agent in covering is about 6% by weight.更多还原