本文選題：變形速率 + 變形量��； 參考：《材料熱處理學報》2017年02期

【摘要】：采用Gleeble3800熱/力模擬試驗機研究了終軋工藝和軋后冷速對GCr15Si Mn軸承鋼相變組織轉變的影響,結合動態(tài)CCT曲線及不同工藝下的組織與顯微硬度分析。結果表明:變形速率對試驗鋼的組織轉變沒有太大影響;隨著變形量的增加,二次碳化物析出增多,珠光體轉變溫度升高,珠光體轉變量增加且球團直徑減小;當冷速由1℃/s升高為5℃/s時,晶界處二次碳化物析出明顯減少,網(wǎng)碳基本消失,組織將會出現(xiàn)馬氏體,馬氏體轉變溫度為163℃,終軋后控制冷卻速度可以達到控制組織轉變類型的目的。
[Abstract]:The effect of finishing rolling process and cooling rate after rolling on the transformation structure of GCr15SiMn bearing steel was studied by using Gleeble 3800 thermal / force simulator. The dynamic CCT curve and microstructure and microhardness of GCr15SiMn bearing steel were analyzed. The results show that the deformation rate has little effect on the microstructure transformation of the test steel, and with the increase of the deformation amount, the precipitation of secondary carbides increases, the transformation temperature of pearlite increases, the amount of pearlite transformation increases and the diameter of pellets decreases. When the cooling rate is increased from 1 鈩，

本文編號：2028924