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前言25MnTiBR钢是我国国产无铬含硼低合金渗碳钢,它是我国工人阶级和技术人员贯彻毛主席“独立自主、自力更生”的伟大方针,立足国内富有资源,走自己工业发展道路的产物。25MnTiBR 钢的试验成功和推广应用,对于加速我国农业机械化和社
Preface 25MnTiBR steel is China’s domestic chromium-free and boron-containing low-alloy carburized steel. It is the product of Chairman Mao’s “independent and self-reliant” guideline of the working class and technical staff of our country based on the domestic rich resources and taking the road of industrial development of our own. 25MnTiBR steel test success and promote the use of agricultural mechanization and accelerate China’s social