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GB/T 10120-2013金屬应力松弛试验方法标准对试验机要求提高

作者：來源：发布日期： 2020.10.21

信息摘要：

GB/T 10120-2013金屬应力松弛试验方法标准对试验机要求提高

GB/T 10120-2013金屬应力松弛试验方法标准已经发布，将于2014年5月1日起实施。与原GB/T10120-1996相比，新标准做了众多修订，包括对试验机同轴度及环境试验温度要求等，都提高了要求。

1、以EN 10319-1：2003为基础，参考了GB/T10120-1996和ASTM E328-02相关内容；

2、修改了標准名稱；

3、試驗原理、術語、符號和示意圖；取消了原標准中除“初始應力、剩余應力”以外的11項術語和定義，增加了“標距、應變、應力”等11項術語和定義。改變了兩個示意圖。

4、試驗的兩大類別：連續試驗和不連續試驗；

5、对试验机加载同轴度校准方法，由于在JJG 139-1999标准有相应的同轴度校准方法，但经过钢研总院近几年的课题研究发现该方法存在重大缺陷，计算结果的偏差可能达到30%，所以推荐按照ASTM E1012进行试验机同轴度校准。

6、加熱裝置：對于溫度偏差和溫度梯度的要求，新標對溫度範圍進行了細分，改爲三檔小于600、600~800、800~1000；

7、增加了對試驗機周圍環境溫度變化的要求：標准要求試驗機環境溫度波動不應超過正負3度；

8、增加了彈性模量測定的要求；

9、其他修訂項目。

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