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该文介绍一种研究金属材料机械性能的新型试验方法——微型剪切试验方法在焊接技术中的应用.该方法简单、省料、试验数据重现性好,尤其适用于定量测定不均匀材料各狭窄区域的性能参数或性能梯度.该文着重研究用微型剪切法评定CO_2焊接接头各区域性能,并将有关试验结果与常规Charpy冲击试验结果相比较.对上述两种方法的试验结果经过回归处理,表明剪切强度与Charpy冲击功之间有较好的对应关系.试验结果初步认为,可以通过微型剪切试验测定材料剪切强度来估算材料的冲击韧性.
This paper introduces a new test method to study the mechanical properties of metal materials - the application of the micro-shear test method in the welding technology.The method is simple, material-saving, reproducible test data, especially for the quantitative determination of inhomogeneous materials Each narrow area of the performance parameters or performance gradient.This paper focuses on the use of micro-shear method to assess the performance of CO_2 welded joints in each region, and the results of the test and conventional Charpy impact test results compared to the test results of the two methods Regression analysis shows that there is a good correspondence between the shear strength and the Charpy impact energy.It is preliminarily believed that the impact toughness of the material can be estimated by measuring the shear strength of the material by the micro shear test.