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Effects of holding time on interface microstructure and element diffusion of WC-Co-Ni/stainless steel composites
International Journal of Refractory Metals & Hard Materials ( IF 4.2 ) Pub Date : 2022-07-13 , DOI: 10.1016/j.ijrmhm.2022.105951
Hongnan Li , Hongmei Zhang , Gang Li , Dadong Zhao , Zhengyi Jiang

In this study, a small-dimensional layered composites of WC-Co-Ni and stainless steel (SS 304) were obtained by self-made mold, in which the cermet was used in powder form and the steel as solid with a diameter of 1 mm. The effects of holding time (60–120 min) on the microstructure, bonding interface, element diffusion, microhardness and wear of WC-Co-Ni/stainless steel composite were examined under the sintering temperature of 1300 °C. This study shows that the microstructure and diffusion behavior reveals a successful metallurgical bonding between the WC cermet and stainless steel. With the increase of holding time, the mutual diffusion of alloy elements is enhanced, the density and microhardness of the composite are increased, and the loss of wear is reduced. An average maximum hardness of 1500 HV was found at the holding time is 120 min. There are crack clusters at the interface of WC-Co-Ni/SS composite when the holding time is 120 min.



中文翻译:

保温时间对WC-Co-Ni/不锈钢复合材料界面组织和元素扩散的影响

本研究通过自制模具获得了WC-Co-Ni和不锈钢(SS 304)的小尺寸层状复合材料,其中金属陶瓷为粉末状,钢为固体,直径为1毫米。在 1300 ℃的烧结温度下,研究了保温时间(60-120 分钟)对 WC-Co-Ni/不锈钢复合材料的显微组织、结合界面、元素扩散、显微硬度和磨损的影响。这项研究表明,微观结构和扩散行为揭示了 WC 金属陶瓷和不锈钢之间成功的冶金结合。随着保温时间的增加,合金元素的相互扩散增强,复合材料的密度和显微硬度增加,磨损损失减少。在保持时间为 120 分钟时发现平均最大硬度为 1500 HV。

更新日期:2022-07-16
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