preheating temperature of 12cr1movg before welding Related introduction


    2. The lower the temperature of the parts. 3. The lower the atmospheric temperature. 4. The smaller the weld rod in diameter. 5. The greater the speed of welding. 6. The higher the carbon content of the steel. 7.The greater the alloy content. 8. The more complicated the shape. The need for preheating increases as the following factors are changed.

  2. Preheat and Interpass Temperature -

    a multiple pass weld. Simply stated, preheat refers to the steel temperature before welding begins; interpass temperature applies after the first pass is made. Interpass temperature is just as important as, if not more important than, preheat temperature with regard to the mechanical and microstructural properties of weldments. Preheat

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