Submerged-arc welding repair method after alkali production squeezing roller is worn
A technology of welding repair and repair method, which is applied in the direction of welding medium, welding equipment, welding equipment, etc., and can solve the problems of resource waste and scrapping
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[0025] The present invention will be further described below in conjunction with example
[0026] This embodiment discloses a submerged arc welding repair method for the worn out extrusion roller of a chemical plant. The extrusion roller involved in the method is made of 85CrMoV and has a hardness of 52-54HRC. The specific repair method steps are:
[0027] Step 1. Preparation before repair
[0028] 1. Before repairing, the roller surface should be cleaned and dried first: measure the size of each part, determine the damaged part and its wear amount;
[0029] 2. Carry out failure analysis and life evaluation on the workpiece, and conduct metallographic inspection
[0030] 3. Specify the repair process and working hours according to the repair content; remove 2-3mm of the fatigue layer on the damaged part of the squeeze roller surface, and clean the fatigue layer so that a new processed surface appears and is easy to operate.
[0031] 4. Detect the material and hardness of...
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