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一、拉力试验的任务和要求拉力试验是考核材料技术质量的试验方法。它用于测定材料受单向静拉力作用下的正弹性系数E、比例极限σ_p、屈服点σ_s、屈服强度σ_(0.2)、抗拉强度σ_b、延伸率δ和断面收缩率φ等。材料在进行拉力试验时,对试样所加的载荷(拉力)和试样相应的变形(伸长),可以绘成载荷—应变曲线。由于材料的化学成份、金相组织和热处理状态各有不同,所得到的载
First, the tasks and requirements of the tensile test Rally test is to test the technical quality of materials test methods. It is used to determine the positive elastic coefficient E, proportional limit σ_p, yield point σ_s, yield strength σ_ (0.2), tensile strength σ_b, elongation δ and cross-sectional shrinkage rate φ under uniaxial static tension. Material tensile load test, the sample added load (tension) and sample deformation (elongation), can be drawn as load-strain curve. Due to the chemical composition of the material, microstructure and heat treatment of different states, the resulting load