1. The power supply with vertical external characteristics is adopted, and the positive polarity is used for DC (the welding wire is connected to the negative pole).2. It is generally suitable for welding thin plates below 6mm. It has the characteristics of a beautiful weld shape and small welding d

There are corresponding causes and solutions for these problems. Like the Brinell hardness test, it is an indentation test method. But it is to measure the depth of the indentation. Rockwell hardness test is a widely used method at present, but the Rockwell hardness scale has three standards: A, B,

1. Tube billet heating: the heating should be uniform, and the temperature should not be raised or lowered rapidly. Each temperature rise and fall should be kept steady and slow, and the maximum temperature rise and fall should not exceed 30°C.2. Centering roller: Make sure that the installation of

The steel piles are used in deep foundations and transfer the loads from the building to stronger soil layers found deep underground. The loads are resisted through skin friction and point bearing. It can be driven either open-ended or closed-ended, with points or plates. Product name: steel pipe pi