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对金属材料高温拉伸试验新旧版本国家标准(GB/T 228.2—2015和GB/T 4338—2006)进行对比分析,得出了新版国家标准主要的技术性变更。与旧版标准相比,新版标准修改了标准名称,同时列为GB/T 228《金属材料拉伸试验》第2部分,第1部分室温拉伸试验方法界定的内容部分适用于新版标准;修订了部分术语和符号;增加了试验速率的控制方法A应变速率控制方法、引伸计的装卡方法和部分温度的温度允许偏差及温度梯度;变更了试样原始横截面积的测定方法和试验结果数值的修约规则。通过新旧标准的对比分析可以帮助质量检验检测部门及相关单位对新版国家标准进行更好地理解和应用,提高检验检测结果的有效性。
Comparative analysis of old and new national standards for tensile testing of metallic materials (GB / T 228.2-2015 and GB / T 4338-2006) has resulted in the major technical changes of the new national standards. Compared with the old standard, the new standard changes the standard name, at the same time as GB / T 228 “tensile test of metal materials,” Part 2, Part 1 room temperature tensile test method to define the content of the new standard applies; revised Part of the terms and symbols; increase the test rate control method A strain rate control method, extensometer card loading method and part of the temperature temperature tolerance and temperature gradient; change the original sample cross section of the determination method and the value of the test results The rule of revision. Through the comparative analysis of old and new standards can help quality inspection and testing departments and related units to better understand and apply the new national standards to improve the effectiveness of test results.