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超高真空環(huán)境冷焊與防冷焊試驗(yàn)現(xiàn)狀與建議

A study on cold welding and protection against cold welding

  • 摘要: 國(guó)外的冷焊試驗(yàn)從環(huán)境壓力（真空度）、試件溫度、試驗(yàn)接觸面的法向壓力、試驗(yàn)表面光潔度污染情況以及接觸面是否有相對(duì)運(yùn)動(dòng)等主要影響因素進(jìn)行分析；同時(shí)采用用于冷焊效應(yīng)研究的環(huán)境試驗(yàn)衛(wèi)星進(jìn)行空間冷焊試驗(yàn)；在冷焊防護(hù)方面也進(jìn)行了大量飛行試驗(yàn)及地面模擬試驗(yàn)，試驗(yàn)表明三氧化二鋁、二氧化鋯、三氧化二鉻及二硫化鉬等薄膜層能有效降低金屬面間的摩擦系數(shù)，可以防止冷焊效應(yīng)的發(fā)生。國(guó)內(nèi)冷焊試驗(yàn)主要是地面模擬試驗(yàn)，文章對(duì)國(guó)內(nèi)各種超高真空冷焊及防冷焊試驗(yàn)設(shè)備分別從用途、技術(shù)指標(biāo)和設(shè)備組成等幾方面作了詳細(xì)介紹。并對(duì)今后這方面的研究方向提出了建議。

     

    Abstract: Cold welding tests mainly concern the following factors: vacuum value, temperature, normal pressure of contact surface, contamination of surface finish and relative activity of contact surfaces. Space cold welding tests use environmental test satellites to study related effects, along with tests for protection against cold welding It is shown that the coating layers of Al2O3、ZrO2、Cr2O3、MoS2 may reduce friction between metal surfaces and prevent cold welding. In our country, the cold welding test is currently restricted to the ground simulation test. This paper discusses various cold welding and cold welding resistant facilities, including their objectives, technology guidelines and related equipments. Some suggestions are made on research orientation of key topics.

     

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