Sampling, test bar taking and sample taking method for mechanical property detection after hardening and tempering of tensioning screw steel bar

The invention discloses a sampling, test bar taking and sample taking method for mechanical property detection after hardening and tempering of tensioning screw steel bars. The method comprises the following steps of S1, grouping the tensioning screw steel bars and determining the detection frequency; S2, setting the distances between tensioning screw steel bars in heat treatment; S3, setting a sampling method; S4, setting a test rod taking method; S5, setting a sample taking method; and S6, carrying out mechanical property detection. According to the method, whether the tempering heat performance of the steel bar is qualified or not can be effectively detected and judged, the authenticity of a detection result and the scientificity of a judgment result are ensured, misjudgment and wrong judgment are avoided, and the manufacturing quality of high-strength tensioning screws of the giant hydroelectric generating set such as Wudongde and Baihetan is ensured; and the method has high practical value and economic v