低碳钢或低碳合金钢,经淬火低温回火处理获得低碳马氏体组织后称为低碳马氏体钢。工程上常用的低碳钢一般是指含碳量在0.10～0.25%之间的钢。这类钢硬度低,塑性好,便于采用冷塑变形成型工艺,且具有良好的焊接性和较小的热处理脱碳倾向等特点,来源方便,价格低廉,在机械制造中应用很广泛。但是由于碳含 Low-carbon steel or low-carbon alloy steel, after quenching low-temperature tempering martensite obtained after the low-carbon martensitic steel. Commonly used in engineering low carbon steel generally refers to the carbon content of 0.10 to 0.25% of the steel. Such steel hardness is low, good plasticity, easy to use cold plastic deformation forming process, and has good weldability and smaller decarburization tendency of heat treatment and other characteristics, convenient source, low price, widely used in machinery manufacturing. But due to carbon content