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一种专为美国铁路开发的高锰钢道岔贴尖，日前被山海关桥梁厂附属二厂开发研制成功，并填补了一项国内空白。 高锰钢道岔贴尖为高科技新产品。制造工艺采用精密铸造，技术标准要求加工不允许出现１毫米之内的质量误差，这一指标已超过了国内铸件标准。承担该产品开发任务的山海
A high-manganese steel ballast tip developed specifically for the American Railways was recently successfully developed by the subsidiary plant of Shanhaiguan Bridge Plant and filled a domestic gap. High-manganese steel ballast tip is a high-tech new product. The manufacturing process adopts precision casting, and the technical standards require that the processing does not allow the mass error within 1 mm. This index has exceeded the domestic casting standards. The sea that undertakes this product development task