【摘要】：采用MMS300熱模擬試驗機對GCr15軸承鋼的熱變形工藝進行模擬,研究變形終止溫度對其顯微組織的影響。結(jié)果表明,變形終止溫度在770~870℃內(nèi)變化時,其顯微組織均為片層狀珠光體+沿晶界分布的先共析碳化物,并且先共析碳化物周圍存在鐵素體薄膜。隨著變形終止溫度的升高,晶粒尺寸和珠光體團的尺寸均增加,珠光體的片層間距略微減小,硬度增加。通過回歸分析獲得維氏硬度與片層間距倒數(shù)的擬合方程HV=38.3S-1+92.7。變形終止溫度在810~870℃內(nèi)升高時,碳化物的網(wǎng)狀程度增加。與810℃相比,變形終止溫度為770℃和790℃時,碳化物的網(wǎng)狀程度較嚴重。
[Abstract]:The thermal deformation process of GCr15 bearing steel was simulated by MMS300 thermal simulation machine, and the effect of deformation termination temperature on its microstructure was studied. The results show that the microstructure of the preeutectoid carbides distributed along the grain boundaries of lamellar pearlite and ferrite films exist around the preeutectoid carbides when the deformation termination temperature varies from 770 鈩，

本文編號：2146254