本文關(guān)鍵詞： 中碳非調(diào)質(zhì)鋼 熱模擬 CCT曲線 金相-硬度法　出處：《金屬熱處理》2017年08期 　論文類型：期刊論文

【摘要】：在Gleeble-3500熱模擬機(jī)上測(cè)定了Nb-V微合化金中碳非調(diào)質(zhì)鋼在不同冷卻速率下的膨脹曲線,并聯(lián)合金相-硬度法,繪制出了Nb-V試驗(yàn)鋼的動(dòng)態(tài)CCT曲線。依據(jù)所繪試驗(yàn)鋼動(dòng)態(tài)CCT曲線,對(duì)試驗(yàn)鋼在不同冷卻速率下組織的轉(zhuǎn)變轉(zhuǎn)變情況進(jìn)行了分析。結(jié)果表明:冷卻速率低于2℃/s時(shí),Nb-V鋼的顯微組織為鐵素體和珠光體,冷卻速率超過(guò)2℃/s時(shí),鋼中組織可以觀察到貝氏體,隨著冷卻速率的增加貝氏體含量也明顯增加;冷卻速率超過(guò)10℃/s時(shí),組織中開始出現(xiàn)馬氏體;冷卻速率超過(guò)15℃/s后Nb-V鋼顯微組織全部為馬氏體。貝氏體轉(zhuǎn)變的臨界冷卻速率為7~10℃/s,馬氏體轉(zhuǎn)變的臨界冷卻速率為10~15℃/s。
[Abstract]:The expansion curves of non-quenched and tempered carbon steels in Nb-V microalloyed gold at different cooling rates were measured on a Gleeble-3500 thermal simulator and combined with metallographic hardness method. The dynamic CCT curve of Nb-V test steel was drawn, and the dynamic CCT curve of test steel was drawn. The microstructure transformation of Nb-V steel at different cooling rates is analyzed. The results show that the microstructure of Nb-V steel is ferrite and pearlite when the cooling rate is less than 2 鈩，

本文編號(hào)：1467713