论文部分内容阅读
一、前言半镇静钢的优点,主要在于金属收得率高(90%以上),铁合金消耗少,而机械性能也接近于镇静钢。例如同样碳含量的半镇静钢,其强度极限虽比镇静钢低1～2公斤/厘米~2,但延伸率却要高一些。同时强度值还可借提高碳锰含量来补尝;半镇静钢的焊接性能比较满意,冷却性和冲击靱性也接近于镇静钢。所以资本主义国家如美国某些冶金工厂半
First, the preface The advantages of semi-killed steel, mainly metal recovery rate is high (90%), ferroalloy consumption less, and the mechanical properties are also close to the calm steel. For example, the same carbon content of semi-killed steel, although the strength of the lower limit of 1 to 2 kg / cm ~ 2 than the killed steel, but the elongation is higher. At the same time the intensity value can also be increased by increasing the amount of carbon and manganese to make up; semi-killed steel welding performance is more satisfactory, cooling and impact 靱 也 also close to the calm steel. Therefore, some capitalist countries such as the United States some metallurgical plants