火災現(xiàn)場中銅包鋼導線熔痕金相鑒別技術研究
發(fā)布時間：2019-06-17 14:40
【摘要】：模擬火災現(xiàn)場中銅包鋼導線熔痕產(chǎn)生的條件,制備一、二次短路熔痕和火災熱作用導線痕跡。使用金相分析法,尋找最佳金相浸蝕劑,研究一、二次短路熔痕的金相組織特點。結(jié)果表明,4%硝酸酒精是最佳浸蝕劑,一次短路熔痕的組織以較細的馬氏體為主,及少量暗色托氏體,存在氣孔;二次短路熔痕中以馬氏體為主,晶界處有鐵素體析出,不存在托氏體,幾乎沒有氣孔存在。
[Abstract]:The condition that the copper-clad steel wire of the copper-clad steel wire in the fire field is simulated is simulated, and a lead trace of a secondary short-circuit melting mark and a fire thermal effect is prepared. Metallographic analysis method is used to find the best metallographic etching agent, and the metallographic structure of the secondary short-circuit fusion mark is studied. The results show that 4% of the nitric acid alcohol is the best etching agent, the microstructure of the primary short-circuit melting mark is dominated by the fine martensite, and a small amount of dark troostite exists in the secondary short-circuit melting mark, and the martensite is the main material in the secondary short-circuit melting mark, and the grain boundary is provided with ferrite to separate out, no supporting body exists, and almost no air hole exists.
【作者單位】： 中國人民武裝警察部隊學院;
【分類號】：TG115.21;D918.91
本文編號：2501060
[Abstract]:The condition that the copper-clad steel wire of the copper-clad steel wire in the fire field is simulated is simulated, and a lead trace of a secondary short-circuit melting mark and a fire thermal effect is prepared. Metallographic analysis method is used to find the best metallographic etching agent, and the metallographic structure of the secondary short-circuit fusion mark is studied. The results show that 4% of the nitric acid alcohol is the best etching agent, the microstructure of the primary short-circuit melting mark is dominated by the fine martensite, and a small amount of dark troostite exists in the secondary short-circuit melting mark, and the martensite is the main material in the secondary short-circuit melting mark, and the grain boundary is provided with ferrite to separate out, no supporting body exists, and almost no air hole exists.
【作者單位】： 中國人民武裝警察部隊學院;
【分類號】：TG115.21;D918.91
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