含镧钇元素的低碳钢焊条配方的设计  

Design of Ingredients of Low Carbon Steel Electrode Containing La and Y

作　　者：范希营[1] 郭永环[1] 

机构地区：[1]徐州师范大学机电工程学院,徐州221116

出　　处：《机械工程学报》2010年第20期101-105,共5页Journal of Mechanical Engineering

基　　金：徐州市科技计划资助项目(XJ08072)

摘　　要：目前设计碳钢焊条时,采用的经验公式中的抗拉强度碳当量(Ct)或下屈服强度碳当量(Cy)含有碳、锰、硅、钙、铬等元素换算成的碳当量,但没有确切的稀土元素换算成的碳当量,不适用于含稀土元素的焊条设计。因此,在新型焊条药皮配方开发研制中,采取药皮过渡适量的镧钇元素,通过5种典型配方的熔敷金属的力学性能试验,利用Matlab函数辅助计算,曲线拟合得出含镧钇元素的熔敷金属抗拉强度(σb)和下屈服强度(σsL)定量公式,三维强度极限网状图,可预知多元稀土配方熔敷金属的σb和σsL值。结果表明,通过采用定量公式可以解决镧钇元素在现有经验公式中不能被换算成碳当量的问题,可以解决经验公式误差较大的问题,尤其能显示镧钇元素添加量与低碳钢焊条熔敷金属力学性能间的定量影响关系。At present,the empirical formulas are used in the design of carbon steel electrode coating.In the tensile strength carbon equivalent（Ct） or lower yield strength carbon equivalent（Cy） of formulas,there are carbon equivalents of C,Mn,Si,Ca,Cr,etc.,but no any exact carbon equivalent of rare earth elements,thus being unsuitable for design of the ingredients of low carbon steel electrode containing rare earth.So a proper amount of lanthanum（La） and yttrium（Y） is transferred through the electrode coating in developing an ingredient for the new type electrode.By means of mechanical property test of deposited metals of five representative ingredients,the quantified formulas and 3-D net chart of the tensile strength and lower yield strength are obtained by Matlab function aided calculation and curve fitting.Tensile strength and lower yield strength of deposited metal with rare earth multicomponent can be known in advance.The results show that the conversion can’t be realized between the carbon equivalent and rare earth elements by the empirical formulas.Consequently,the problem of the big errors can be solved by the quantified formula.Especially,it can clearly reveal the quantitative relationship between the addition of La and Y and the mechanical properties.

关 键 词：电焊条 镧 钇 抗拉强度 设计 

分 类 号：TG422.1[金属学及工艺—焊接] TG146.4[一般工业技术—材料科学与工程]