ＷＭ１００型混砂机刮板堆焊层组织与性能分析大连铁道学院周志良谢明杨蔚一、前言近年来，我国各行业陆续进口了高达１０００亿美元的机械设备［１］，由于零件磨损，每年需要补充的备件约需数亿美元去购买，这对我国是一个沉重的负担，为了节约这项外汇，必须解决进口设... WM100 Sand Mixer Scraper Surfacing Layer Structure and Property Analysis Dalian Railway Institute Zhou Zhiliang Xie Ming Yang Wei 一, Foreword In recent years, China’s various industries have imported up to 100 billion US dollars of machinery and equipment [1], due to wear and tear parts, Each year need to add spare parts to spend hundreds of millions of dollars to buy, which is a heavy burden on our country, in order to save the foreign exchange, we must solve the import ...