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由于压力容器的大型化,厚截面与超厚截面压力容器的增多,低合金高强度钢的广泛使用,原子能压力容器、火箭压力壳以及石油化工用低温压力容器的增多,因此对及时发现产品在制造过程中所造成的缺陷,以防止事故发生的无损探伤技术提出了新的更高的要求。但以往的静态无损探伤技术,诸如射线、超声波、电磁等均只能检查材料、产品已产生的缺陷,
Due to the enlargement of pressure vessels, the increase of pressure vessels with thick sections and extra-thick sections, the widespread use of low-alloy high-strength steels, the increase of atomic pressure vessels, rocket pressure vessels and petrochemical low-temperature pressure vessels, The manufacturing process caused by defects in order to prevent the occurrence of non-destructive flaw detection technology has put forward new and higher requirements. But the past static non-destructive testing techniques, such as radiation, ultrasound, electromagnetic, etc. can only check the material, the product has produced defects,