【摘要】：研究了亞溫淬火工藝中淬火加熱溫度、兩相區(qū)淬火溫度、回火溫度等參數(shù)對(duì)試制的國(guó)產(chǎn)9%Ni鋼組織的影響,通過(guò)試驗(yàn)分析確定了實(shí)驗(yàn)室最佳亞溫淬火工藝,即:淬火加熱溫度宜為800℃,兩相區(qū)淬火溫度宜為680℃,回火溫度宜為580℃。對(duì)亞溫淬火熱處理中容易出現(xiàn)的問(wèn)題及其與QT處理的不同進(jìn)行了討論。研究表明,亞溫淬火處理中出現(xiàn)的帶狀組織是由于兩相區(qū)淬火加熱保溫時(shí)間過(guò)長(zhǎng)引起元素偏聚造成的,將亞溫淬火保溫時(shí)間控制在30 min以?xún)?nèi),可避免帶狀組織出現(xiàn)。亞溫淬火處理可獲得比調(diào)質(zhì)處理更細(xì)小的晶粒及更細(xì)的組織,逆轉(zhuǎn)變奧氏體量增多且分布更加彌散均勻。
[Abstract]:The effects of quenching heating temperature, quenching temperature in two-phase zone and tempering temperature on the microstructure of domestic-made 9%Ni steel were studied in this paper. The optimum sub-temperature quenching technology in laboratory was determined by experimental analysis. That is, the quenching temperature is 800 鈩，

本文編號(hào)：2448637