摘要
为使粉末反应喷涂技术实用化,提出并研究了反应喷涂锻造工艺。将Ti、C粉按化学计量配制,并加入少量Ni,混合后压成棒材作为喷涂材料。以铝包镍为过渡层,采用陶瓷棒喷枪,进行氧乙炔火焰反应喷涂锻造工艺试验,在316L钢板表面制备了TiC/Ni金属陶瓷涂层。工艺参数为：基体预热温度300~400℃,乙炔压力0.12~0.13MPa,乙炔流量0.7~0.8m3/h,氧气压力0.4~0.5MPa,氧气流量1.3~1.4m3/h,空气压力0.4~0.8MPa,喷涂角度90°,喷涂距离100~150mm。涂层经锻造气孔减小,与基体结合紧密,耐磨性能提高。实测锻造涂层的弹性模量147.79GPa,基体弹性模量202.99GPa。锻造试样涂层在不同载荷下的维氏硬度为541HV0.1、542HV0.2、499HV0.5,能够满足作为植入件的硬度要求。
The reactive spraying forge technology was developed and investigated in this study to make it more practical to the industry.Ti powders and C powders added with a bit of Ni powders were blended according to stoichiometric ratio and pressed into cylindrical rods.The experiment for reactive oxyacetylene flame spraying technology combined with forging was done by ceramic rod spray gun with Aluminum-coated nickel composite powders used for the transition layer.TiC/Ni ceramic coating was developed on the surface of 316Lsteel substrate and the parameters for reactive spraying technology combined with forging were as follow：preheat temperature of 300-400 ℃,acetylene pressure of 0.12-0.13 MPa,acetylene flow of 0.7-0.8m3/h,oxygen pressure of 0.4-0.5MPa,oxygen flow of 1.3-1.4m3/h,air pressure of 0.4-0.8MPa,spraying angle of 90°,and spraying distance of 100-150mm.The results show that the flaws and holes in the ceramic coating decrease and the bonding strength between the matrix and the coating is strengthened with the improvement of the abrasive resistance.Elasticity modulus of the ceramic coating is 147.79GPa and the one of the substrate is 202.99GPa after forging.The Wechsler hardness of the ceramic coating after forging are541HV0.1,542HV0.2,499HV0.5under different loads,which can meet the need of implant part.
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2014年第3期65-70,共6页
China Surface Engineering
基金
北京市自然科学基金(3122030)
关键词
医用钢
反应喷涂
TIC
NI
steel for medical use
reactive spraying
TiC/Ni
