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    超細(xì)晶雙相鋼無(wú)縫鋼管的中頻感應(yīng)熱處理工藝研究

    Research on Medium-frequency Induction Heat Treatment Process of Seamless Ultra-fine Grain Dual-phase Steel Tube

    • 摘要: 熱軋無(wú)縫鋼管通過(guò)中頻感應(yīng)加熱進(jìn)行循環(huán)加熱+淬火工藝處理后，基體內(nèi)的組織將發(fā)生多次相變，從而使鐵素體以及奧氏體淬火后得到的馬氏體晶粒均得以細(xì)化。通過(guò)循環(huán)熱處理工藝得到基體為鐵素體+馬氏體組織的超細(xì)晶雙相鋼，且多次循環(huán)后雙相鋼內(nèi)的鐵素體晶?？杉?xì)化到1 μm左右。

       

      Abstract: Owing to undergoing circulating MF induction heating-quenching process, multiple phase transitions of base metal structure of the hot-rolled seamless steel tube occur so as to refine all the martensite grains resulting from quenching of the ferrite and austenite structure.Thanks to the said circulating heat treatment process, the dualphase steel with base metal composed of ultra-fine grains of ferrite-martensite structure is obtained, and furthermore after multiple circulations, the ferrite grains of the dual-phase steel can be refined up to 1 μm approximately.

       

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