A、<span style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-ascii-font-family: \'Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'">提高强度和硬度、改善切削加工性能</span>
B、碎化网状的二次渗碳体，为球化退火作组织准备
C、<span style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-ascii-font-family: \'Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'">获得马氏体，提高硬度和耐磨性</span>
D、<span style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-ascii-font-family: \'Times New Roman\'; mso-hansi-font-family: \'Times New Roman\'">作为最终热处理，获得材料的最终性能</span>
A、<span style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">提高强度和硬度、改善切削加工性能</span>
C、<span style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">获得马氏体，提高硬度和耐磨性</span>
D、<span style="FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">作为最终热处理，获得材料的最终性能</span>