【摘要】：研究了AMS 6308鋼在不同溫度回火過(guò)程中Cu的強(qiáng)化機(jī)制及其對(duì)力學(xué)性能的影響。結(jié)果表明,150~350℃回火,AMS6308鋼的組織為回火馬氏體,強(qiáng)度和硬度略有增加,韌性下降。400~450℃回火,強(qiáng)度和硬度逐漸增加,這是由大量細(xì)小(10 nm)的ε-Cu相在基體內(nèi)和位錯(cuò)線上析出造成。450℃回火,ε-Cu相析出數(shù)量顯著增加,導(dǎo)致強(qiáng)度和硬度達(dá)到峰值,韌性最差。450℃以上回火,隨溫度提高,ε-Cu相長(zhǎng)大粗化,析出數(shù)量減少,其形態(tài)由球狀轉(zhuǎn)變?yōu)榘魻罨蚨虠U狀,沉淀強(qiáng)化作用減弱,M6C碳化物長(zhǎng)大,基體發(fā)生回復(fù)再結(jié)晶,強(qiáng)度和硬度顯著下降,韌性逐漸提高。
[Abstract]:The strengthening mechanism of Cu and its effect on mechanical properties of AMS 6308 steel during tempering at different temperatures were studied. The results showed that the microstructure of AMS6308 steel was tempered martensite, strength and hardness increased slightly, toughness decreased, tempering at 400 ~ 450 鈩，

本文編號(hào)：2381863