The quality of mandrel material was improved
To improve the service life of mandrel, the quality of mandrel material should be improved first. Which material pr

➢The temperature of mandrel changes periodically in a process cycle.
➢ When the mandrel receives the heat transferred from the hot tube blank, it can only be

In the metallurgical process, titanium and the materials in contact with it will produce strong interaction and contact corrosion; in special medium, pitting co

1. The blank density does not meet the planning requirements.
In the production of powder metallurgy parts, the material density is high, and the physical and m

1. Coating: covering the surface of processed parts with a layer of other materials without any chemical reaction;
2. Surface chemical treatment: chemical react

There are two aspects of metal surface treatment. One is surface protection, which is used to prevent metal corrosion. The commonly used surface protection meth

This process can be used as outer polyethylene and inner epoxy composite steel pipe. The performance of plastic coated steel pipe mainly means corrosion. The sa

1、 Galvanizing process of iron and steel parts acid zinc plating
Degreasing → derusting →│ → purification → drying └ alkaline zinc platin