2. In plain carbon steel, carbon is the only alloy element. 只有在普碳钢中，碳才是唯一的合金元素。
3. Evaluation of fracture toughness of the alloy steel by the JR resistance curve shows the influence of heat treatment technology. 应用所得JR阻力曲线对合金钢的断裂韧度的评定表明了热处理工艺的影响。
英英解释
n.
1. a mixture containing two or more metallic elements or metallic and nonmetallic elements usually fuse
2. the state of impairing the quality or reducing the value of something v.
1. lower in value by increasing the base-metal content
2. make an alloy of
