高頻淬火加熱時間對鋼管表面組織和性能的影響
發(fā)布時間：2019-05-24 22:31
【摘要】：目的確定高頻淬火后零件出現(xiàn)軟點的原因,通過調(diào)整工藝參數(shù)以獲得合格組織。方法通過直讀光譜測試工件化學(xué)成分,采用體視顯微鏡、金相顯微鏡和掃描電鏡觀察試樣的宏觀與微觀組織,分析工件的淬火層深度和顯微組織形態(tài)。通過能譜儀測試樣品淬火組織的成分差異。梳理生產(chǎn)過程,確定淬火零件軟點形成的原因。結(jié)果通過掃描電鏡配置的能譜儀測試發(fā)現(xiàn),產(chǎn)生軟點的樣品黑色區(qū)域馬氏體的碳含量較高,白色區(qū)域馬氏體碳含量較低;未產(chǎn)生軟點的樣品黑區(qū)和白區(qū)馬氏體的碳含量差別不大。結(jié)論高頻淬火零件事先未經(jīng)調(diào)質(zhì)處理,碳含量分布不勻,高頻淬火時間短,碳原子沒有得到充分擴散,淬火后的零件在組織中形成了高碳和低碳馬氏體兩種結(jié)構(gòu),導(dǎo)致淬火后零件出現(xiàn)軟點。
[Abstract]:Objective to determine the cause of soft spots in parts after high frequency quenching, and to obtain qualified organization by adjusting process parameters. Methods the chemical composition of the workpiece was measured by direct reading spectrum. The macro and microstructure of the sample were observed by stereoscopic microscope, metallographic microscope and scanning electron microscope, and the depth and morphology of quenching layer of the workpiece were analyzed. The composition difference of quenching structure of the sample was measured by energy dispersive spectrometer. Carding the production process to determine the reasons for the formation of soft spots in quenched parts. Results by scanning electron microscope (SEM), it was found that the carbon content of martensite in black area was higher and that in white area was lower in the samples with soft spots. There is no difference in the carbon content between the black and white areas of the samples without soft spots. Conclusion the high frequency quenching parts have not been quenched and tempered in advance, the distribution of carbon content is uneven, the high frequency quenching time is short, and the carbon atoms are not fully diffused. The quenched parts form two kinds of structures of high carbon and low carbon martensite in the microstructure. Cause soft spots of parts after quenching.
【作者單位】： 河北農(nóng)業(yè)大學(xué)機電工程學(xué)院;
【分類號】：TG142.1;TG162.84
[Abstract]:Objective to determine the cause of soft spots in parts after high frequency quenching, and to obtain qualified organization by adjusting process parameters. Methods the chemical composition of the workpiece was measured by direct reading spectrum. The macro and microstructure of the sample were observed by stereoscopic microscope, metallographic microscope and scanning electron microscope, and the depth and morphology of quenching layer of the workpiece were analyzed. The composition difference of quenching structure of the sample was measured by energy dispersive spectrometer. Carding the production process to determine the reasons for the formation of soft spots in quenched parts. Results by scanning electron microscope (SEM), it was found that the carbon content of martensite in black area was higher and that in white area was lower in the samples with soft spots. There is no difference in the carbon content between the black and white areas of the samples without soft spots. Conclusion the high frequency quenching parts have not been quenched and tempered in advance, the distribution of carbon content is uneven, the high frequency quenching time is short, and the carbon atoms are not fully diffused. The quenched parts form two kinds of structures of high carbon and low carbon martensite in the microstructure. Cause soft spots of parts after quenching.
【作者單位】： 河北農(nóng)業(yè)大學(xué)機電工程學(xué)院;
【分類號】：TG142.1;TG162.84
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