针对GB/T 228.1-2010中方法A、方法B、附录F以及横梁控制4种不同拉伸速率控制模式, 采用两组薄板在Z100拉伸试验机做不同控制模式的试验速率试验, 并对4种方法进行分析比较。结果表明: 对于大部分黑色金属材料来说, 4种拉伸速率控制方法对力学性能结果的影响不明显, 仅对部分应变速率敏感的材料结果才会有差异; 实施方法A时虽然平均应变速率恒定, 但实际应变速率超过误差限, 偏离方法A; 实施方法B时, 建议在RP, ReH阶段采用与屈服阶段相同的速率控制模式, 以避免试验失控。实施附录F时, RP, ReH阶段参数m与弹性阶段的参数E不能等同, 设置速率VC不应与弹性阶段相同。

Based on four kinds of control method of tensile testing rate including method A, method B, annex F and position control method in GB/T 228.1-2010, different control methods were applied to do tensile tests by two groups of thin sheet with Z100 testing machine, and four kinds of method were analyzed and compared. The results showed that the effects on mechanical properties were not obvious to all most of ferrous metal by four kinds of method, only may be difference to strain rate sensitive metal; when method A was applied, although average strain rate was constant, actual strain rate would exceed error limits, so deviated from method A; in order to avoided testing out of control, it was suggested that use equal rate control method in RP, ReH range and in yield range when method B was applied; when annex F was applied, parameter m in RP, ReH range and parameter E in elastic range shouldn’t be equal, and VC was too.