<***N style="FONT-SIZE: 18pt" lang=EN-US>55SiMnVB<***N style="FONT-FAMILY: 宋体; FONT-SIZE: 18pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">弹簧钢热处理规范及金相组织：

<***N style="FONT-FAMILY: 宋体; FONT-SIZE: 18pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">热处理规范：淬火<***N style="FONT-SIZE: 18pt" lang=EN-US>860<***N style="FONT-FAMILY: 宋体; FONT-SIZE: 18pt; mso-bidi-font-family: 宋体">℃<***N style="FONT-SIZE: 18pt" lang=EN-US>±20<***N style="FONT-FAMILY: 宋体; FONT-SIZE: 18pt; mso-bidi-font-family: 宋体">℃<***N style="FONT-SIZE: 18pt" lang=EN-US>,<***N style="FONT-FAMILY: 宋体; FONT-SIZE: 18pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">油冷<***N style="FONT-SIZE: 18pt" lang=EN-US>; <***N style="FONT-FAMILY: 宋体; FONT-SIZE: 18pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">回火<***N style="FONT-SIZE: 18pt" lang=EN-US>460<***N style="FONT-FAMILY: 宋体; FONT-SIZE: 18pt; mso-bidi-font-family: 宋体">℃<***N style="FONT-SIZE: 18pt" lang=EN-US>±50<***N style="FONT-FAMILY: 宋体; FONT-SIZE: 18pt; mso-bidi-font-family: 宋体">℃<***N style="FONT-SIZE: 18pt" lang=EN-US>(<***N style="FONT-FAMILY: 宋体; FONT-SIZE: 18pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">特殊需要时<***N style="FONT-SIZE: 18pt" lang=EN-US>,±30<***N style="FONT-FAMILY: 宋体; FONT-SIZE: 18pt; mso-bidi-font-family: 宋体">℃<***N style="FONT-SIZE: 18pt" lang=EN-US>)<***N style="FONT-FAMILY: 宋体; FONT-SIZE: 18pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。

<***N style="FONT-FAMILY: 宋体; FONT-SIZE: 18pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">金相组织：回火索氏体。