| 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0.12~0.13 MPa，乙炔流量0.7~0.8 m3/h，氧气压力0.4~0.5 MPa，氧气流量1.3~1.4 m3/h，空气压力0.4~0.8 MPa，喷涂角度90°，喷涂距离100~150 mm。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147.79 GPa，基体弹性模量202.99 GPa。锻造试样涂层在不同载荷下的维氏硬度为541 HV0.1、542 HV0.2、499 HV0.5，能够满足作为植入件的硬度要求。 |
| 关键词: 医用钢 反应喷涂 TiC/Ni |
| DOI：10.3969/j.issn.1007-9289.2014.03.011 |
| 分类号: |
| 基金项目: |
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| Technology of Reactive Spray Forging to TiC/Ni Coating on the Surface of 316L Steel for Medical U |
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CHEN Dazhi, HE Jiantai, ZHANG Yangde, CHEN Wei, SU Hongyi, GAO Yixiang1,2
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1. The National Hepatobiliary and Enteric Surgery Research Center, Central South University, Changsha, 410008;2. Department of Mechanical Engineering, Academy of Armored Forces Engineering, Beijing 100072
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| Abstract: |
| 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 Aluminumcoated nickel composite powders used for the transition layer. TiC/Ni ceramic coating was developed on the surface of 316L steel substrate and the parameters for reactive spraying technology combined with forging were as follow: preheat temperature of 300400 ℃, acetylene pressure of 0.120.13 MPa, acetylene flow of 0.70.8 m3/h, oxygen pressure of 0.40.5 MPa, oxygen flow of 1.31.4 m3/h, air pressure of 0.40.8 MPa, spraying angle of 90°, and spraying distance of 100150 mm. 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 147.79 GPa and the one of the substrate is 202.99 GPa after forging. The Wechsler hardness of the ceramic coating after forging are 541 HV0.1，542 HV0.2，499 HV0.5 under different loads, which can meet the need of implant part. |
| Key words: steel for medical use reactive spraying TiC/Ni |
