【摘要】：借助掃描電子顯微鏡(SEM)、透射電子顯微鏡(TEM)、微力材料拉伸試驗機(jī)和顯微硬度計等手段,研究了超細(xì)晶粒高碳鋼多道次激光沖擊強(qiáng)化(LSP)處理后的微觀組織演變和力學(xué)性能的變化規(guī)律。結(jié)果表明,強(qiáng)激光誘導(dǎo)沖擊波超高應(yīng)變率變形使超細(xì)晶粒高碳鋼微復(fù)相組織中等軸鐵素體晶粒的直徑和球化完全的滲碳體顆粒的粒徑分別由400 nm和150 nm進(jìn)一步細(xì)化至200 nm和100 nm左右,使力學(xué)性能指標(biāo)和顯微硬度得到明顯提高,塑性指標(biāo)也有一定程度的改善,但是斷口形貌由韌性斷裂特征向準(zhǔn)解理和韌性混合型斷裂轉(zhuǎn)變。
[Abstract]:By means of scanning electron microscope (SEM), transmission electron microscope (TEM), tensile testing machine and microhardness tester, The microstructure evolution and mechanical properties of ultra-fine grain high carbon steel treated with multi-pass laser shock enhanced (LSP) were studied. The results show that The ultra-high strain rate deformation of shock wave induced by high intensity laser leads to the further refinement of the diameter of equiaxed Ferrite grains in the micromultiphase microstructure of ultra-fine grain high carbon steel and the particle size of cementite particles with complete spheroidization from 400 nm and 150 nm to about 200 nm and 100 nm, respectively. The mechanical properties and microhardness are obviously improved, and the plasticity index is also improved to a certain extent, but the fracture morphology changes from ductile fracture characteristics to quasi-cleavage and ductile mixed fracture.
【作者單位】： 河南科技大學(xué)材料科學(xué)與工程學(xué)院;有色金屬共性技術(shù)河南省協(xié)同創(chuàng)新中心;
【基金】：國家自然科學(xué)基金50801021和5120106 河南省高等學(xué)校青年骨干教師項目2011GGJS-070 江蘇省光子制造科學(xué)與技術(shù)重點實驗室開放基金GZ201204資助項目~~
【分類號】：TG142.1;TG665

【參考文獻(xiàn)】

相關(guān)期刊論文 前7條

1 孔德軍;張永康;魯金忠;鄒世坤;;激光沖擊處理后Ni基高溫合金的性能[J];材料研究學(xué)報;2006年05期

2 羅新民;馬輝;張靜文;陳康敏;張永康;羅開玉;;激光沖擊誘導(dǎo)的奧氏體不銹鋼表層納晶化[J];中國激光;2011年06期

3 鐘俊偉;魯金忠;羅開玉;楊超君;戴峰澤;鐘金杉;王慶偉;齊晗;張磊;;AISI 8620合金鋼激光沖擊強(qiáng)化層摩擦學(xué)特性[J];中國激光;2012年01期

4 陳國安;楊王s，

本文編號：2486443