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我是一名从事产品质量检验的技术人员,现就寒冷地区(-40℃)金属构件性能的模拟测试请教下面几个问题:1.我国现在有无低温试验方法标准?若有,标准号是多少?2.低温试验设备有哪几种类型?原理是什么?3.低温材料性能与常温下的主要区别?4.可否用材料性能代表构件性能?
I am a technician engaged in product quality inspection, is on the cold region (-40 ℃) simulation of the performance of metal parts to ask the following questions: 1. China now have low-temperature test method standards? If so, the standard number is How many? 2 low temperature test equipment which type? What is the principle? 3 low temperature material properties and the main difference at room temperature? 4 can material properties represent the performance?