SAE1141H鋼花鍵軸熱處理后開(kāi)裂原因分析
發(fā)布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時(shí)間：2016-04-30
用顯微組織觀察和超聲波探傷等方法，分析研究了SAE1141H鋼花鍵軸經(jīng)中頻感應(yīng)加熱淬火后檢驗(yàn)時(shí)在線切割取樣過(guò)程中出現(xiàn)的開(kāi)裂現(xiàn)象。
SAE1141H鋼花鍵軸熱處理后開(kāi)裂原因分析Crack reason analysis on SAE1141H steel spline shaft after heat treatment用顯微組織觀察和超聲波探傷等方法，分析研究了SAE1141H鋼花鍵軸經(jīng)中頻感應(yīng)加熱淬火后檢驗(yàn)時(shí)在線切割取樣過(guò)程中出現(xiàn)的開(kāi)裂現(xiàn)象。結(jié)果表明，花鍵軸內(nèi)部并沒(méi)有裂紋，這種開(kāi)裂是中頻感應(yīng)加熱淬火后花鍵軸中的殘余應(yīng)力在切割過(guò)程中釋放的結(jié)果，它起源于硫化物的偏聚區(qū)并沿著硫化物擴(kuò)展。通過(guò)改變檢驗(yàn)時(shí)取樣的切割路線可以有效避免這種開(kāi)裂現(xiàn)象。
Cracks on SAE1141H free-cuRing steel spline shaft．occurred during linear cutting samples for check after medium—frequency?induction hardening，were analyzed with observation of microstructure and supersonic inspection etc．The results show that there are actually?no crocks inside of the shaft and the cracks are caused by the release of residual stress during sampling after medium·frequency induction?hardening．The cracks originate from the accumulation zone of sulphides and propagate along with the sulphides．It Can be effectively avoided?by changing the cutting route during sampling.
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