發(fā)布時(shí)間：2019-05-27 10:16

【摘要】：本文探討了合金元素釩、硼、硅對(duì)激光熔覆M2高速鋼涂層組織與性能的影響過程,通過對(duì)釩、硼、硅激光熔覆M2高速鋼涂層組織與性能結(jié)果的對(duì)比分析,得到合金元素釩、硼、硅在激光熔覆工藝下所起到的影響以及釩、硼、硅系M2激光熔覆高速鋼的最佳熱處理回火工藝。從而為生產(chǎn)高強(qiáng)度涂層耐磨材料提供理論支持和依據(jù)。具體研究內(nèi)容為使用XRD、OM、SEM等手段對(duì)熔覆層的宏觀形貌特征、微觀組織特征、物相組成等相關(guān)作用機(jī)理進(jìn)行表征與分析;通過對(duì)涂層硬度、紅硬性以及高溫磨損性能的分析,對(duì)熱處理工藝參數(shù)進(jìn)行優(yōu)化和合金元素的作用機(jī)理進(jìn)行探討。具體研究結(jié)果如下:釩系M2激光熔覆高速鋼組織涂層的最佳熱處理回火工藝為560℃×1h×1次;M2-3%V和M2-4%V的釩系M2激光熔覆高速鋼凝固態(tài)組織為馬氏體、網(wǎng)狀M2C碳化物以及殘余奧氏體;M2-3%V和M2-4%V的釩系M2激光熔覆高速鋼熱處理組織包括回火馬氏體和網(wǎng)狀M2C碳化物;M2-8%V系M2激光熔覆高速鋼組織為鐵素體以及碳化物。M2-3%V涂層試樣表現(xiàn)出很高的硬度,達(dá)到858HV,紅硬性數(shù)值達(dá)到643HV,隨著釩含量(3%)的不斷增大,激光熔覆高速鋼涂層的硬度不斷減小,紅硬性不斷減小,耐磨性逐漸變差;激光熔覆釩系M2高速鋼組織熔覆層磨損形式主要有剝層磨損與磨粒磨損,M2-3%V和M2-4%V以剝層磨損為主,M2-8%V以磨粒磨損為主。激光熔覆硼系M2高速鋼組織熔覆層的最佳熱處理回火工藝為560℃×1h×3次;激光熔覆硼系M2高速鋼凝固態(tài)組織包含有馬氏體、網(wǎng)狀M2(C,B)碳化物以及殘余奧氏體;熱處理回火組織有回火馬氏體與網(wǎng)狀M2(C,B)碳化物。隨著硼含量的不斷增大,激光熔覆高速鋼涂層的硬度和紅硬性略有增大并趨于穩(wěn)定,磨損性能有所降低;M2-0.5%B的硬度達(dá)到889HV,紅硬性達(dá)到744HV。激光熔覆硼系M2高速鋼組織熔覆層其磨損的形式以磨料磨損與剝層磨損為主。M2-0.05%B高速鋼以磨料磨損為主,M2-0.3%B兼有磨料與剝層磨損,M2-0.5%B時(shí)以剝層磨損形式為主。硅系M2激光熔覆高速鋼熔覆層最佳熱處理回火工藝為560℃×1h×1次。硅系M2激光熔覆高速鋼凝固態(tài)組織有馬氏體、網(wǎng)狀M2C碳化物以及殘余奧氏體;熱處理回火組織為回火馬氏體與網(wǎng)狀M2C碳化物。隨著硅含量的不斷增大,激光熔覆高速鋼涂層的硬度和紅硬性逐漸增大后減小,磨損性能略微降低。M2-1.0%Si試樣的硬度達(dá)到882HV,紅硬性達(dá)到625HV,激光熔覆硅系M2高速鋼熔覆層磨損的主要形式為剝層磨損為主。
[Abstract]:In this paper, the effect of alloy elements vanadium, boron and silicon on the microstructure and properties of laser coated M2 high speed steel coating is discussed. The microstructure and properties of M2 high speed steel coating coated by vanadium, boron and silicon are compared and analyzed, and the alloy elements vanadium and boron are obtained. The influence of silicon under laser coating process and the optimum heat treatment and tempering process of vanadium, boron and silicon M2 laser cladding high speed steel. Thus, it provides theoretical support and basis for the production of high strength coating wear-resistant materials. The specific research content is to use XRD,OM,SEM and other means to characterize and analyze the macro-morphology characteristics, microstructure characteristics, phase composition and other related mechanisms of the coating layer. Based on the analysis of hardness, red hardness and high temperature wear properties of the coating, the optimization of heat treatment process parameters and the action mechanism of alloy elements are discussed. The results are as follows: the optimum heat treatment and tempering process of vanadium M2 laser cladding high speed steel microstructure coating is 560 鈩，

本文編號(hào)：2486066