高温冲击拉伸试验技术

Experimental Technique for High Temperature Tensile Impact

在自行研制的高速旋转盘式间接杆杆型冲击拉伸试验装置上,采用扁平哑铃状的试件,用耐高温无机胶使试件两端分别与输入杆和输出杆的叉口粘接;采用自行研制的高温炉对粘接后的试件进行快速接触加温,初步形成了800℃以下的高温冲击拉伸试验技术.对SUS304不锈钢板(厚度为1.1mm)实施常温至537℃的冲击拉伸试验和准静态拉伸试验.初步探索表明SUS304不锈钢是温度相关和应变率相关的材料,且在准静态和高应变率加载下均出现了高温脆化现象(室温至537℃).

A high temperature tensile impact experimental technique (under 800℃) is preliminarily developed. A kind of refractory inorganic adhesive is used to connect the flat dumbbellshaped specimen and the input/output bars of the rotating disk barbar tensile impact apparatus.A high temperature furnace is designed to heat the specimen by means of rapid contact heating.The quasistatic and tensile impact experiments are performed to study the mechanical behavior of stainless steel plate SUS304 at different temperatures ranging from 25℃ to 537℃.The experimental results show that the stainless steel SUS304 is a temperature and strainrate dependent metal.A high temperature embrittlement phenomenon is observed at both quasistatic and high strain rate loading conditions.