本文選題：激光技術(shù)　切入點(diǎn)：激光熔覆　出處：《中國(guó)激光》2017年06期

【摘要】：在316不銹鋼表面進(jìn)行激光熔覆Stellite 3、Stellite 21與新型Co基合金(Co-3)試驗(yàn),分析了熔覆層的顯微組織及相成分,研究了硬度分布和耐擦傷機(jī)理。試驗(yàn)結(jié)果表明,Co-3顯微組織均勻、致密,無(wú)裂紋與氣孔,其強(qiáng)化相主要為(Co,W)_3C、Cr_(23)C_6、Cr_7C_3和Co_3Mo。熔覆層的平均顯微硬度約為624HV_(0.2),較基體提高3倍以上。Co-3的耐擦傷性能明顯優(yōu)于316基體的,在載荷為0~150N的情況下,當(dāng)劃痕長(zhǎng)度s≤3.3mm時(shí),擦傷機(jī)理主要是塑性變形;當(dāng)劃痕長(zhǎng)度3.3mms≤6.9mm時(shí),擦傷機(jī)理主要是塑性變形引起的晶�；婆c微裂紋形成;當(dāng)劃痕長(zhǎng)度s6.9mm時(shí),擦傷機(jī)理主要是裂紋擴(kuò)展與塑性去除。
[Abstract]:The laser cladding of Stellite _ 3 / Stellite _ (21) and a new Co based alloy (Co _ (3)) were carried out on the surface of 316 stainless steel. The microstructure and phase composition of the coating were analyzed, and the hardness distribution and scratch resistance mechanism were studied. The results showed that the microstructure of the coating was uniform and compact. The strengthening phase of the cladding layer is mainly CoCoCW / C / C / C _ (23) C / C _ 6 / C _ (7) C _ (+) _ 3 and Co3Mo.The average microhardness of the cladding layer is about 624 HVV / 0.2n, which is more than 3 times than that of the substrate. The scratch resistance of Co-3 is obviously better than that of 316substrate. When the scratch length s 鈮，

本文編號(hào)：1659704