isun 发表于 2006-9-28 23:05:55

关于100℃熱水回火问题---[请教]

<P>我看到有资料说：</P>
<P><STRONG><SPAN>100℃熱水回火之優點</SPAN><SPAN lang=EN-US><?XML:NAMESPACE PREFIX = O /><O:P> </O:P></SPAN></STRONG></P>
<P class=MsoNormal style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify"><FONT size=3><SPAN style="FONT-FAMILY: 新細明體; mso-bidi-font-weight: bold; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">低溫回火常使用</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">180</SPAN><SPAN style="FONT-FAMILY: 新細明體; mso-bidi-font-weight: bold; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">℃至</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">200</SPAN><SPAN style="FONT-FAMILY: 新細明體; mso-bidi-font-weight: bold; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">℃左右來回火，使用油煮回火。其實若使用</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">100</SPAN><SPAN style="FONT-FAMILY: 新細明體; mso-bidi-font-weight: bold; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">℃的熱水來進行回火，會有許多優點，包括：（</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">1</SPAN><SPAN style="FONT-FAMILY: 新細明體; mso-bidi-font-weight: bold; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">）</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">100</SPAN><SPAN style="FONT-FAMILY: 新細明體; mso-bidi-font-weight: bold; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">℃的回火可以減少磨裂的發生；（</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">2</SPAN><SPAN style="FONT-FAMILY: 新細明體; mso-bidi-font-weight: bold; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">）</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">100</SPAN><SPAN style="FONT-FAMILY: 新細明體; mso-bidi-font-weight: bold; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">℃回火可使工件硬度稍增，改善耐磨性；（</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">3</SPAN><SPAN style="FONT-FAMILY: 新細明體; mso-bidi-font-weight: bold; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">）</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">100</SPAN><SPAN style="FONT-FAMILY: 新細明體; mso-bidi-font-weight: bold; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">℃的熱水回火可降低急速加熱所產生裂痕的機會；（</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">4</SPAN><SPAN style="FONT-FAMILY: 新細明體; mso-bidi-font-weight: bold; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">）進行深冷處理時，降低工件發生深冷裂痕的機率，對殘留沃斯田體有緩衝作用，增加材料強韌性；（</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold">5</SPAN><SPAN style="FONT-FAMILY: 新細明體; mso-bidi-font-weight: bold; mso-ascii-font-family: Times New Roman; mso-hansi-font-family: Times New Roman">）工件表面不會產生油焦，表面硬度稍低，適合磨床研磨加工，亦不會產生油煮過熱乾燒之現象。</SPAN><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><O:P> </O:P></SPAN></FONT></P>
<P class=MsoNormal style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify"><FONT size=3><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><O:P>---------</O:P></SPAN></FONT></P>
<P class=MsoNormal style="TEXT-JUSTIFY: inter-ideograph; TEXT-ALIGN: justify"><FONT size=3><SPAN lang=EN-US style="mso-bidi-font-weight: bold"><O:P>因为我现在就使用180-200的<FONT face=PMingLiU>油煮回火 ，关于100度热水没看到其他人提过，谁使用过呢？或者评价一下<BR></FONT></O:P></SPAN></FONT></P>

cqjfhyq 发表于 2006-9-29 11:49:02

Re: 关于100℃熱水回火问题---[请教]

100度热水回火其实算不上回火,顶多算是时效吧.因为:1淬火马氏体不能转变为回火马氏体;2残余奥氏体的转变量也相当有限;3我个人认为这种方法不可取.

isun 发表于 2006-9-29 14:12:12

Re: 关于100℃熱水回火问题---[请教]

呵呵 我也觉得好像和回火原理不符 温度太低

marsway7279 发表于 2006-10-4 15:45:04

Re: 关于100℃熱水回火问题---[请教]

這是假性回火,適合在淬火後,無法立及回火工藝,實施權宜的對策,

isun 发表于 2006-10-6 13:23:03

Re: 关于100℃熱水回火问题---[请教]

<P>原帖由 simon chen 发表
這是假性回火,適合在淬火後,無法立及回火工藝,實施權宜的對策, </P>
<P>那这种“假性回火”能达到什么样的效果？</P>
<P>什么情况下能否代替油回火？<BR></P>
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