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3NB—800型和3NB—1000型泥浆泵泵体阀箱锥孔经常被高压泥浆刺坏,在预热的条件下采用手工电弧焊,对泵体阀箱锥孔进行一次性焊补,经加工后进行检验,基本达到了原质量要求。由于这两种泵的后泵体材料均为35CrMo或30CrNiMo,可焊性差,又要求锥孔与阀座配合表面具有可靠的密封性,焊后需经多道加工,以得到较高质量的切削表面。因此,必须严格施焊,以保证良好的焊补质量。
3NB-800 and 3NB-1000 Mud Pumps Cone holes in the pump body are often punctured by high-pressure mud and are manually soldered by manual arc welding under preheated conditions. After the test, basically reached the original quality requirements. Because the two pump after the pump body material are 35CrMo or 30CrNiMo, poor weldability, but also requires tapered bore and seat with a reliable sealing surface, after welding to be multi-channel processing, in order to get a higher quality cutting surface. Therefore, we must strictly welding, in order to ensure a good welding quality.