表面活性剂添加量对YT5牌号硬质合金微观结构和性能的影响  

Effect of Surfactant Dosage on Microstructure and Properties of YT5 Cemented Carbide

作　　者：张洪刚[1] 陈玲[1] ZHANG Hong-gang;CHEN Ling(Zigong Cemented Carbide Co.,Ltd.,Zigong 643011,China)

机构地区：[1]自贡硬质合金有限责任公司,四川自贡643011

出　　处：《稀有金属与硬质合金》2020年第4期79-83,共5页Rare Metals and Cemented Carbides

摘　　要：以YT5牌号硬质合金为研究对象,添加质量分数为0~0.15%的表面活性剂硬脂酸进行湿磨并烧结得到合金试样,通过对合金试样的显微结构观察、粒度分析以及物理力学性能检测,研究了表面活性剂添加量对YT5牌号硬质合金的微观结构及性能的影响。结果表明,合金试样的WC相、(Ti,W)C相平均晶粒尺寸随表面活性剂添加量的增加而降低;合金的矫顽磁力、硬度随表面活性剂添加量的增加而略有升高,表面活性剂添加量每增加0.04%,矫顽磁力提高0.2 kA/m;添加少量表面活性剂对YT5合金的密度、弯曲强度、钴磁、孔隙度无明显影响。YT5 cemented carbide was used as the research object,and the alloy sample was prepared by wet grinding and sintering with 0~0.15% stearic acid as the surfactant.The effect of surfactant content on microstructure and properties of YT5 cemented carbide was studied by microstructure observation,particle size analysis and physical and mechanical property testing.The results show that with the increase of surfactant content,the average grain size of WC and(Ti,W)C phases decreases,and the coercivity and hardness of the alloy slightly increases.The coercivity increases by 0.2% for per 0.04% increase of surfactant addition.A small amount of surfactant has little effect on the density,bending strength,cobalt magnetism and porosity of YT5 alloy.

关 键 词：YT5牌号硬质合金 WC (Ti W)C固溶体 表面活性剂 湿磨 微观结构 性能 

分 类 号：TG135.5[一般工业技术—材料科学与工程]