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利用热浸渗法对Cr12Mo V冷作模具钢进行渗硼处理,通过激光淬火对渗硼层进行了强化处理,用SEM、EDS、XRD对渗硼层表面-界面形貌、化学元素分布和物相进行表征,分析了激光淬火对渗硼层组织和性能的影响。结果表明,激光淬火后Cr12Mo V钢渗硼层表面孔洞减少,降低了剥落的可能性;激光淬火后渗硼层产生了Fe-Cr化合物和Fe2B新相,仍以Fe B相为主,有利于减少渗硼层脆性;元素未发生大量扩散,富碳层仍然存在,但组织得到细化,韧性和强度有所提高;激光淬火时孔洞中Si元素溶于奥氏体中,分布更均匀,Cr与Fe结合增强了渗硼层结合强度。
The hot-infiltration method was used to infiltrate Cr12Mo V cold-working die steel. The boronizing layer was strengthened by laser quenching. The surface-interface morphology, chemical element distribution and structure of boronizing layer were studied by SEM, EDS and XRD. Phase characterization, analysis of laser quenching on the boronizing layer microstructure and properties. The results show that the surface cavities on the boronizing layer of Cr12Mo V steel decrease after laser quenching, which reduces the possibility of spalling. After laser quenching, a new phase of Fe-Cr compound and Fe2B is formed, Reduce the brittleness of the boronizing layer; the element does not occur a large number of diffusion, the carbon-rich layer still exists, but the organization has been refined, toughness and strength has improved; laser quenching Si element dissolved in austenite, the distribution is more uniform, Cr Bonding with Fe enhances the bond strength of the boronizing layer.