CTOD test for weld-metal (filler metal) 焊缝金属CTOD实验

 

The demands for welding consumables are getting higher and higher day by day due to the industry that builds bigger and more demanding constructions. Risk is getting bigger and welding procedures gets more restrictions and better traceability is required. There are many ways to make prior tests for welding joints in order to find the weakest spots and also lots of standards that have to be followed. The CTOD test (crack tip opening displacement) was developed to determine the resistance against "further" cracking at a certain temperature. In the past this test was done at sub zero temperatures of -10ºC but today the offshore industry oft requires -40ºCelsius

 由于工业领域不断在制造更大更复杂的结构,对焊材的品质要求一日高于一日。风险在不断增加,焊接工艺要求日趋严格,并要求更高的可追溯性。有很多种事前实验方法来找到焊缝的最薄弱点。CTOD裂纹张开位移是因此而发展起来的,用于确定在特定温度下,裂纹的进一步扩展状况。以往的实验只在-10°C进行,但现在的海洋工程装备领域普遍要求在-40°进行。