What is the difference between heat treatment blackening and flange, and what is the process?

When the flange is forged freely, the shape of the forging is gradually forged from the blank through some basic deformation processes. The basic process of free forging welding flange includes upsetting, drawing, stamping, bending and cutting. ? The general process of blackening is decontamination and degreasing-cleaning-pickling and derusting-cleaning-blackening-cleaning-saponification-oil soaking.

Difference:

1, with different properties: the blackened liquid reacts with the material of the workpiece itself to form a coating. After oxidation treatment, the thickness of the coating is 0.5- 1.5 micron, and the flange is the connecting part between the shafts, which is used to connect the pipe ends.

2. Different features: The flange of pipeline flange for pipeline equipment refers to the import and export flange of the equipment. There are holes in the flanges, and bolts make the two flanges closely connected. Boiling black has no obvious effect on the size and accuracy of parts.

3. Different processes: the blackening process can be divided into normal temperature blackening and traditional high temperature blackening. The advantage of blackening at room temperature is that at room temperature, it can be impregnated into a film through the workpiece, which is more convenient. Flange assembly Assemble the vertebral body and the big flange according to the drawing requirements, and then divide the big flange into 8 equal parts.

Extended data:

Precautions:

1. When installing the check valve, pay special attention to the flow direction of the medium, and the normal flow direction of the medium should be consistent with the direction of the arrow marked on the valve body, otherwise the normal flow of the medium will be cut off. The bottom valve should be installed at the bottom of the water pump suction pipeline.

2. When the check valve is closed, it will produce water hammer pressure in the pipeline, which will lead to the damage of valves, pipelines or equipment in serious cases, especially for large-diameter pipelines or high-pressure pipelines, which should attract the attention of check valve users.

3. The check valve is only used to open and close the valve in one direction to prevent the fluid medium from flowing backwards on various pipelines or equipment.

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