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常見的彈簧的熱處理方式有哪幾種？各有什么作用？

分類：行業(yè)新聞發(fā)布時(shí)間：2025-07-19

　　彈簧的熱處理是通過對彈簧的加熱、保溫和冷卻，來改變金屬和合金內(nèi)部結(jié)構(gòu)，以達(dá)到改變材料的機(jī)械、物理和化學(xué)性能的目的。

　　熱處理是彈簧生產(chǎn)的重要工序之一，每個(gè)彈簧生產(chǎn)廠家都非常重視、并且毫無例外都要進(jìn)行這一工序。合理地選擇熱處理工藝，對發(fā)揮彈簧材料的潛力、提高彈簧的抗疲勞性能，具有極其重要的意義。常見的熱處理方式有以下幾種。

一、淬火

　　什么叫淬火？

　　淬火就是把彈簧鋼加熱到一定溫度（臨界溫度）（AC3或AC1）以上，保溫一定時(shí)間，使之成為奧氏體，再以大于臨界溫度急速冷卻，從而獲得馬氏體組織的熱處理方法。

　　彈簧淬火溫度一般如何確定？

　　彈簧淬火溫度一般根據(jù)以下幾點(diǎn)確定：

　　1）鋼的成分：AC3 +30~50°C適用于含碳量低于0.8%的彈簧鋼絲，AC1 +30~50°C適用于含碳量等于或大于0.8%的彈簧鋼

　　2）彈簧的外形尺寸和形狀：如線徑＜3mm不適用較低的加熱溫度

　　3）冷卻介質(zhì)和淬火方法

　　4）奧氏體晶粒長大傾向：如50CrVA，加熱溫度可在較寬的范圍內(nèi)選擇；如65Mn60Si2Mn則不宜把溫度提得過高以免造成過熱

　　5）加熱速度：如鉛淬碳素彈簧鋼絲和油淬火鋼絲的淬火溫度可達(dá)900~950°C，但晶粒并不粗大

二、回火

　　什么叫回火？

　　回火是將淬火后的彈簧再加熱到AC1以下的某一溫度，保溫一段時(shí)間，然后以適當(dāng)?shù)姆绞嚼鋮s到室溫的熱處理方法。通常把回火分為低溫回火（150~250°C）、中溫回火（350~500°C）和高溫回火（500~650°C）

　　回火的目的有哪些？

　　1）減少彈簧淬火或的內(nèi)應(yīng)力

　　2）穩(wěn)定彈簧的組織和幾何尺寸

　　3）獲得所需要的機(jī)械性能

　　如何確定彈簧回火后的硬度？

　　彈簧回火后的硬度要根據(jù)使用要求而定，大多數(shù)螺旋彈簧的硬度范圍在HRC45~50質(zhì)檢，武器等使用壽命有限的彈簧在HRC47~53之間選取，最高可達(dá)HRC54。片彈簧為滿足韌性要求，大都在HRC40~45范圍內(nèi)選取。

上一篇：不銹鋼彈簧的選用需要考慮哪些因素？

下一篇：彈簧的行業(yè)格局

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常見的彈簧的熱處理方式有哪幾種？各有什么作用？

常見的彈簧的熱處理方式有哪幾種？各有什么作用？