金属盘管的室温拉伸试验方法

Tensile test methods for metallic coils at room temperature

分别采用试样两端压扁法、人工掰直法和矫直机矫直法对H68黄铜盘管和BFe10-1-1白铜盘管进行室温拉伸试验,并对试验结果进行分析。结果表明:对于壁厚不小于1 mm、断后伸长率不小于60%的金属盘管,试样端部压扁后,可以有效地进行室温拉伸试验;对于壁厚小于1 mm、断后伸长率小于40%的金属盘管,采用正压法可以提高试验成功率;当试样允许矫直,或屈服强度无要求时,将试样进行整体矫直更容易操作。

The tensile tests of H68 brass coil and BFe10-1-1 white copper coil at room temperature were carried out by flattening at both ends of the sample and straightening the sample with manual and straightening machine,and the test results were analyzed.The results show that the tensile test at room temperature could be effectively carried out for the metal coil with wall thickness not less than 1 mm and elongation after fracture not less than 60%after the end of the sample was flattened.For metal coils with wall thickness less than 1 mm and elongation after fracture less than 40%,the positive flattening method could improve the test success rate.When the sample was allowed to be straightened,or the yield strength was not required,it was easier to straighten the sample as a whole.