Self-Lubricating Property of TiB2-Ni Coating in the Hot Forging Die of Aluminum Alloy

Coatings

Zhehan Wang¹  Xudong Pan¹  Huajun Wang¹  Pingyuan Ye¹  Tao Fu¹  Bing Xie¹ 

[1] Department of Materials Science and Engineering, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;

关键词: self-lubricating coating;    plasma transferred arc;    plasma melt injection;    hot die forging;    aluminum alloy;   

DOI  :  10.3390/coatings12060829

来源: DOAJ

【 摘 要 】

Hot die forging is a forging forming method widely used in the automobile industry, shipbuilding, and the aerospace industry. In the hot die forging process of aluminum alloy, the “mold sticking” defect often occurs and results in low productivity and short die life. Herein, we prepared TiB₂ reinforced nickel-based coatings by the combined use of a plasma transferred arc and plasma melt injection method, and investigated the morphology and properties of composite coatings in hot forging die conditions. The results showed that the nickel-based coating reinforced with TiB₂ generated boron-rich self-lubricating products during the sliding with aluminum alloy, and the adhered aluminum alloy on a coating surface has significantly reduced quantity and transformed morphology from rough plough to smooth layer with the increase of TiB₂, which is beneficial to the surface quality of the aluminum alloy counterface. The results of this research provide valuable guidelines for the design and preparation of the coatings applied in the mold in hot die forging of aluminum alloys.

【 授权许可】

Unknown