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阀板阀座表面Co-Cr-W堆焊层通过固溶和时效弥散硬化处理,改变碳化物的形状、大小及其分布从而强化基体,提高阀板阀座耐磨性和密封性,
Valve plate seat surface Co-Cr-W surfacing layer by solution and aging dispersion hardening treatment, changing the shape, size and distribution of carbide to strengthen the substrate to improve the valve plate seat wear resistance and sealing,