本文選題：變形速率 + 變形量　； 參考：《材料熱處理學(xué)報(bào)》2017年02期

【摘要】：采用Gleeble3800熱/力模擬試驗(yàn)機(jī)研究了終軋工藝和軋后冷速對GCr15Si Mn軸承鋼相變組織轉(zhuǎn)變的影響,結(jié)合動(dòng)態(tài)CCT曲線及不同工藝下的組織與顯微硬度分析。結(jié)果表明:變形速率對試驗(yàn)鋼的組織轉(zhuǎn)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(zhuǎn)變溫度升高,珠光體轉(zhuǎn)變量增加且球團(tuán)直徑減小;當(dāng)冷速由1℃/s升高為5℃/s時(shí),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(huì)出現(xiàn)馬氏體,馬氏體轉(zhuǎn)變溫度為163℃,終軋后控制冷卻速度可以達(dá)到控制組織轉(zhuǎn)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