Mold welding repair process points

Forging companies need the necessary equipment and the right training to ensure the correct welding repair process, including the right welding materials, welding power, welding aids, cranes, electric furnaces. On this basis, the correct welding process includes the following 9 points:

1. Mold cleaning and inspection The cleaning and inspection of the mold to be repaired is the basis for determining the correct welding repair process. After cleaning, according to the inspection results, the welding repair process is determined, including the type and quantity of the welding consumables. Combine for repair purposes.

2. Before cleaning the cavity, thoroughly clean the cracks, scales, fatigue layer and all impurity materials in the cavity, and clean out enough openness. Generally, it needs 40-60 angle to ensure the welding rod or welding wire can be normal. Deposition.

3, the important step of successfully repairing the mold before heating before welding, the heating temperature is 800-900 °F, calculated and insulated according to the thickness per inch, the total number of weldments in the heating furnace or heating flame depends on the insulation material The mass and the heating value of the heated flame.

4. The position of the weldment weldment must ensure that the welder is allowed to operate in the area to be welded. Sometimes the position of the weldment needs to be constantly adjusted during the welding process, but the centerline of the cavity to be welded must be perpendicular to the ground. Short arcs are used for welding to ensure that the weld wall is intimately integrated with the weld material and the weld wall must be within the welder's line of sight.

5. Post-weld tapping After each weld bead is finished, it must be hit by pneumatic or mechanical means to achieve the best crystal phase structure of the cladding layer and prevent the weldment from shrinking along the centerline during cooling.

6. After heating and normalizing, the heating and normalization is 800-900 °F, and the thickness is 1 h per inch. The purpose is to prevent the workpiece and cladding layer from cooling too fast.

7. Slow cooling and slow cooling means that the weldment is slowly cooled to room temperature in an air-stationary environment. The purpose of slow cooling is to achieve a balanced microscopic crystal phase structure and toughness, so as to achieve the best effect in the forging process.

8. The purpose of tempering to remove stress is to remove the stress generated in the welding, and finally reach the toughness required by the mold and the hardness of the cladding layer. The tempering time is calculated by 1 hour per inch of thickness.

9. The final step of the final cooling welding is to let the weldment cool down to room temperature in a static air environment. The weldment can be coated with a heat insulating material to enhance the slow cooling effect.

Global hardware network

Concerned about surprises

Label: Mold welding repair process points

Previous: Analysis of the design and manufacture of the cover mold Next: The daily maintenance of the lock 4

The XUNDA Petrolatum Paste is a cold applied mastic for sealing and filling the pipeline valve .flange etc.

It suitable for application in a wide range of climatic conditions. It is used for molding around irregular profiles such as flange .valve.joint to provide a contour that suitable for wrapping the Petrolatum Tape. It contains inert siliceous fillers and vegetable fibres.

Petrolatum compound containing inert siliceous fillers and vegetable fibres. It contains no volatile organic solvents.

Petrolatum Paste

Denso Paste,Petrolatum Paste,Petroleum Paste,Denso Petrolatum Tape

Jining xunda pipe coating materials co., ltd. , https://www.pipeanticorrosion.com