| Total output and radial rate increase rapidly of tyre with the fast development of the national economy,the knowledge are getting deep into steel cord that be used as framework material of radial tyre.Steel cord’s quality and output increasing drive the promotion of radial rate and product quality rapidly,reduce the product cost powerful.Recent years,the development of tire framework material is reflected in new technique、new product,the main purpose is that providing better function、more choice wide for tyre industry.It has been selected only two:one is cyaniding and the other is thermal diffusion,though there’re quite a lot of methods of copper plating.But in fact,during the plating industry,cyanide application could lead to environment pollution,what’s more,the healthy would be influenced.Thus this text using the thermal diffusion plating for researching.selects the optimal process conditions by means of different screening condition that plating copper on steel cord,then studying strand of cord,plating thickness,ratio of copper&zinc,surfactant content influence on steel wire adhesion;plating thickness influence on drawing loss of plating,and diameter of wire,copper content influence on fatigue properties.Finding out the best process condition and controlling the cost effectively.By use of Instron4302 tensile machine inspects and analyses steel wire adhesion,Axios X-ray analyses copper content and ratio of copper&zinc,Dynamic fatigue instrument tests fatigue properties.Conclusion shows that Axios X-ray tester can catch the demand of accuracy class;3-4 strands of cord push the usage rate highest,it has more effective application meaning;plating thickness is 0.2μm contributes to binding of steel cord and rubber;ratio of copper&zinc is 67%drive the highest adhesion;surfactant content is 0.2mg/cm2 can gain the best bonding effect;plating thickness be 0.25μm can control the cost effectively;previous treatment could improve the construction,covering ability and binding of plating;the thinner wire and lower copper content lead to higher fatigue properties. |
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