在铸件补焊中,经常采用加热减应区法。由于铸件缺陷位置不同,如何正确地掌握和应用这一方法是十分重要的。如怎样选择适当的加热位置、加热范围、加热温度、加热时间和补焊方法的配合等。特别是当缺陷在薄壁和应力集中处而又受厚的减应区的牵制时,有一项选择不当,在焊后的冷却过程中,会使铸件产生裂纹。下面介绍两种不同位置的缺陷运用加热减应区法的实例。 In the casting repair welding, heating reduction zone method is often used. Due to the different casting defects, how to correctly grasp and apply this method is very important. Such as how to choose the appropriate location of the heating, heating range, heating temperature, heating time and welding method with the match. In particular, when defects are trapped in thin-walled and stress-concentrated areas and are heavily damped, there is an improper option that cracks the castings during post-weld cooling. The following describes the use of two different positions of the defect heating reduction zone method example.