摘要
断裂韧性(K1C)是一种防止裂纹失稳扩展的能力。然而,低断裂韧性是制约硬质合金应用和发展的主要因素。研究影响断裂韧性的因素至关重要。采用Palmqvist压痕裂纹法测定了WC-10Co-0.6Cr_(3)C_(2)合金的断裂韧性(K1C),并对原料Co粉类型、烧结方式、烧结时间、烧结温度以及合金相对磁饱和等因素与合金断裂韧性K1C的关系进行了研究。实验结果表明:采用颗粒分布均匀的球形钴粉作为原料,通过低压烧结方式并提高合金烧结温度,以及将合金相对磁饱和值控制在75%~85%的范围内,都可以在一定程度上提高硬质合金的断裂韧性。
Fracture toughness(K1C)is a ability to prevent the instability expansion of crack.However,the low fracture toughness is the main factors to limit the application and development of cemented carbide.It is essential to research the factors that affect the fracture toughness.The fracture toughness(K1C)of WC−10Co–0.6Cr_(3)C_(2) cemented carbide was tested by Palmqvist pressure mark test.And the relationship between the type of Co powder,sintering method,sintering time,sintering temperature,and relative magnetic saturation of the alloy and the fracture toughness K1C of the alloy was studied.The results show that:The increasing of sintering temperature,choosing of spherical and homogenized particles of cobalt powder and the low-pressure sintering method and controlling the magnetic saturation in the 75%~85%range can improve the fracture toughness of the cemented carbide.
作者
杨跃
Yang Yue(Luoyang Golden Egret Geotools Co.,Ltd.,Luoyang 417001,Henan)
出处
《福建冶金》
2024年第4期35-38,共4页
Fujian Metallurgy
关键词
硬质合金
断裂韧性
磁饱和
cemented carbide
fracture toughness
magnetic saturation
