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In order to develop a basic electrode with low fume and good usability, a uew slag system has been designed after analyzing several basic electrode slag systems. Then in view of uniform design method, arranging the experiment points by it, the influenced laws of the uew system coating compouents on the arc stability had been searched. In the formula, niue coating compouents were taken as independent variables and they were divided into six levels in all twenty-four experiments. The arc stability was taken as function and taken down the data when welding and then put them into the computer to be processed statistically. The analysis results give the mathematical model and trend diagrams between independent variables and the function. They indicate that the effects of many coating compouents on the arc stability are in the mutual form. The mutual effects between CaCO3 and BaF2, BaF2 and BaCO3 , increases the arc stability separately. While the mutual effects between CaF2 and iron powder, the square item of iron powder itself decreases the arc stability separately. 相似文献
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用均匀设计方法研究药皮辅料与稳弧性的关系 总被引:1,自引:0,他引:1
运用均匀设计方法,研究了交流电弧稳定性与焊条药皮辅料之间的关系,建立了二者之间的数学模型.方差分析表明,回归方程呈高度显著,并给出了三种辅料交互作用对稳弧性影响规律曲线,用以预测电弧稳定性或控制药皮辅料的配比,也可以直观地分析焊条药皮辅料的作用. 相似文献
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分析了Sn2.5Ag0.7Cu/Cu钎料在添加活性元素前后,润湿性能及界面形貌的演变规律.测定了Ge元素含量不同时钎料的铺展面积,用扫描电镜对化合物的形态进行了分析.分析了钎焊时固液相界面张力与活性元素在该处吸附量的关系及其对润湿性能的影响.结果表明,在钎料中Ge元素质量分数为0.5%时,其在界面处的吸附量明显增加,化合物向前生长趋势强烈,润湿铺展面积最大.在质量分数为1.0%时其吸附量依然明显,但润湿效果减弱,且化合物的厚度相对变薄.这说明Ge元素在一定的范围内会降低钎焊界面处的张力,并且当偏聚量较大时可抑制铜和钎料之间的扩散作用,阻碍化合物生长. 相似文献
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利用纳米压痕法对BGA焊点(Cu,Ni)6Sn5,Cu6Sn5,Cu3Sn界面化合物(IMC)进行了压痕试验.基于Oliver-Pharr法确定了(Cu,Ni)6Sn5,Cu6Sn5,Cu3Sn的弹性模量和压痕硬度,研究了加载速率对IMC纳米压痕力学行为的影响及其变化规律.结果表明,锯齿流变效应与加载速率的大小是相关的.在加载速率较小的情况下(Cu,Ni)6Sn5,Cu6Sn5,Cu3Sn都具有锯齿流变效应,但程度不同;在加载速率较大的情况下(Cu,Ni)6Sn5,Cu3Sn锯齿流变效应不明显,而Cu6Sn5的锯齿流变效应相对明显.(Cu,Ni)6Sn5,Cu6Sn5,Cu3Sn界面IMC的弹性模量分别为126,118,135 GPa;压痕硬度分别为6.5,6.3,5.8 GPa;含镍的(Cu,Ni)6Sn5化合物弹性模量和压痕硬度均比Cu6Sn5的值要高. 相似文献
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分析了多种国内外碱性焊条药皮渣系,设计了新的渣系.用均匀设计的思想方法和计算机软件来安排试验.选定9种药皮辅料作为自变量,并把每个自变量分成6个水平,共做了24个焊条小样.利用计算机统计分析脱渣性数据.结果给出了自变量与因变量之间的数学模型和趋势图.它们揭示出内在规律:多种药皮辅料对焊缝脱渣性的影响呈交互作用的形式,其中大理石与碳酸钡、硅灰石与铝镁粉、金红石与铁粉之间两两的交互作用都会使焊缝脱渣性提高;而铝镁粉与萤石、铝镁粉与碳酸钡之间两两的交互作用都会使焊缝脱渣性降低. 相似文献