关于换热器钎焊工作原理深度解析及图解

个人简介：

换热器在工业生产中扮演着至关重要的角色，它能够有效地将热量从一个介质传递到另一个介质，钎焊作为一种常见的换热器连接方式，因其优良的密封性和耐腐蚀性而备受青睐，本文将详细解析换热器钎焊的工作原理，并通过图解的方式帮助读者更好地理解这一过程。

换热器钎焊概述

1、钎焊的定义

钎焊是一种利用熔点低于母材的金属（钎料）将两个或多个金属（母材）连接起来的焊接方法，在换热器制造中，钎焊主要用于连接管板、管束等部件。

2、钎焊的特点

（1）密封性好：钎焊可以使连接处达到很高的密封性能，防止介质泄漏。

（2）耐腐蚀性：钎焊后的连接处具有良好的耐腐蚀性，适用于各种腐蚀性介质。

（3）强度高：钎焊后的连接处具有较高的强度，可承受一定的压力和温度。

换热器钎焊工作原理

1、钎焊过程

（1）清洁：对连接部位进行清洁处理，去除油污、氧化层等杂质。

（2）预热：将连接部位预热至钎料熔化温度以上，通常预热温度为200-300℃。

（3）钎焊：将钎料加入连接部位，加热使其熔化，并使其充分渗透到母材的间隙中。

（4）冷却：待钎料凝固后，自然冷却或进行强制冷却，以确保连接部位的强度和密封性。

2、钎焊机理

（1）毛细作用：在加热过程中，钎料熔化后，由于表面张力的作用，会自动填充到母材的间隙中。

（2）扩散作用：钎料在熔化过程中，会与母材发生扩散，形成牢固的冶金结合。

换热器钎焊工作原理图解

1、钎焊过程示意图

（1）清洁

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