钢表面离子束改性类金刚石膜层性能

离子束沉积类金刚石膜是钢表面改性的一项新技术。类金刚石改性膜层显微硬度和表面电阻率在特定轰击能量下出现峰值 ;双离子束轰击混合界面可以提高膜层显微硬度 ,并使峰值向低能量方向偏移 ,而且大大增强膜基结合强度。在大气环境中 ,改性膜层对钢的摩擦系数达到 0 0 80～ 0 1 80 ,在摩擦过程中起减摩作用。另一方面 ,类金刚石膜层显著提高钢的耐磨性 ,试验表明 ,40Cr钢表面镀膜后其磨损量是镀膜前的 1 /2 74。类金刚石膜由于使 2Cr1 3不锈钢在 3 5%NaCl溶液中的自然电位Ecorr和点蚀击穿电位Eb 增大 ,因而明显增强钢的抗点蚀能力。

Properties of DLC Modification Coatings Deposited on Surface of Steel by Ion Beam

It is a new technology of steel surface modification that diamond-like carbon film was deposited by ion beam.Ion beam bombarded energy had an influence upon the properties of DLC film.The maximum microhardness and surface resistance rate existed at about 600eV.Dual ion beam bombarded and mixed interface can increase microhardness and resistance rate of DLC film and result in their maximum moving to lower energy.It also strengthens greatly the adhesion between DLC film and matrix.At atmosphere,the friction coefficient of DLC film against steel is from 0.080 to 0.180.In reciprocating sliding wear test,DLC film increases remarkably the wear resistance of steel.It shows that wear loss of 40Cr steel after coating is 1/274 than that of before.DLC films raise E corr and E b of 2Cr13 stainless steel in 3.5% NaCl solution,and improve the ability of steel to resist to pitting corrosion.It is a new technology of steel surface modification that diamond-like carbon film was deposited by ion beam.Ion beam bombarded energy had an influence upon the properties of DLC film.The maximum microhardness and surface resistance rate existed at about 600eV.Dual ion beam bombarded and mixed interface can increase microhardness and resistance rate of DLC film and result in their maximum moving to lower energy.It also strengthens greatly the adhesion between DLC film and matrix.At atmosphere,the friction coefficient of DLC film against steel is from 0.080 to 0.180.In reciprocating sliding wear test,DLC film increases remarkably the wear resistance of steel.It shows that wear loss of 40Cr steel after coating is 1/274 than that of before.DLC films raise E corr and E b of 2Cr13 stainless steel in 3.5% NaCl solution,and improve the ability of steel to resist to pitting corrosion.