【摘要】：采用DIL805A相變儀結(jié)合光學(xué)顯微鏡(OM)、掃描電鏡(SEM)和透射電鏡(TEM)研究不同淬火速度對60Si2CrVAT彈簧鋼顯微組織、力學(xué)性能和馬氏體轉(zhuǎn)變點的影響。研究結(jié)果表明:在淬火速度從10℃/s增加800℃/s的過程中,隨淬火速率的增加,馬氏體塊的寬度從666.0 nm減小至573.9 nm,馬氏體板條的寬度從189.0 nm減少到147.3 nm。60Si2CrVAT彈簧鋼的強度、塑性和硬度總體呈現(xiàn)先增加后降低的趨勢,馬氏體轉(zhuǎn)變溫度則呈先下降后增加的趨勢,當(dāng)冷速為200℃/s時,馬氏體轉(zhuǎn)變開始點溫度最低而強度和塑性均達到最大,分別為1 924 MPa和26.4%,綜合力學(xué)性能最好。淬火過程中產(chǎn)生的微納米孿晶馬氏體對提高材料的強塑性起到了促進作用。
[Abstract]:The effects of quenching speed on microstructure, mechanical properties and martensite transformation point of 60Si2CrVAT spring steel were studied by DIL805A phase transformation instrument, (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM). The results show that the width of martensite block decreases from 666.0 nm to 573.9 nm, with the increase of quenching rate from 10 鈩，

本文編號：2378463