【摘要】：利用YAG脈沖固體激光器,在高純氬氣的保護(hù)下,選取優(yōu)化了的激光工藝參數(shù)在45#鋼表面制備FeAlCrNiSiC六元高熵合金涂層。主要采用OM、SEM、EDS、XRD和顯微硬度等分析手段,對實(shí)驗(yàn)制備的合金涂層的形貌、組織結(jié)構(gòu)、成分、相結(jié)構(gòu)、硬度及相關(guān)機(jī)理進(jìn)行了研究。實(shí)驗(yàn)結(jié)果表明:優(yōu)化的激光熔覆工藝參數(shù)為功率85 W,激光掃描速度為5mm/s,能量密度47J/mm2,搭接率50%。采用此優(yōu)化工藝參數(shù)成功制備了與基體形成良好冶金結(jié)合的FeAlCrNiSiC高熵合金涂層。制備涂層的硬度達(dá)到了800HV,涂層的內(nèi)部結(jié)構(gòu)由條狀等軸晶及網(wǎng)狀枝晶組成,組分偏析得到了有效緩解。合金涂層具有FCC結(jié)構(gòu)的γ-Fe和BCC結(jié)構(gòu)的FeAlCrNiSiC固溶體的簡單物相,合金元素Al、Cr、Si、Ni、C固溶在兩種多組元固溶體中,增加了晶格畸變,使涂層具有高的硬度。
[Abstract]:FeAlCrNiSiC six-element high entropy alloy coating was prepared on the surface of 45 # steel by using YAG pulse solid-state laser under the protection of high purity argon. The morphology, microstructure, composition, phase structure, hardness and related mechanism of the alloy coating prepared by OM,SEM,EDS,XRD and microhardness were studied. The experimental results show that the optimized laser coating process parameters are as follows: power 85 W, laser scanning speed 5 mm 鈮，

本文編號：2499395