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一、前言为了适应社会主义建设发展的需要,我们结合国家资源,研究试制了一种屈服强度为50公斤/毫米。级低合金高强度钢14MnMoVB。该钢种不含Ni、Cr,主要采用微量硼与钼相配合的合金化方法,使钢在空冷条件下得到贝茵体组织,将室温屈服强度提高到普通锅炉钢板的两倍以上,由于含碳量低,总的合金含量少,钢材的焊接性能良好,是一种适合于常温及中温焊接结构的低合金高强度钢。到目前止上钢三厂已经生产了四千多吨6～20毫米厚的14MnMoVB钢板,以薄型板材性能更为稳定。
I. Preface In order to meet the needs of the development of socialism, we combined with national resources to study the production of a yield strength of 50 kg / mm. Grade low alloy high strength steel 14MnMoVB. The steel does not contain Ni, Cr, the main use of trace boron and molybdenum alloy alloying method, the steel obtained under billet birch microstructure, the room temperature yield strength increased to more than twice the ordinary boiler plate, due to containing Low carbon content, less total alloy content, good welding performance of steel, and is a kind of low alloy high strength steel suitable for normal temperature and medium temperature welding structure. Up to now only three steel plant has produced more than 4,000 tons of 6 ~ 20 mm thick 14MnMoVB steel to thin plate more stable performance.