Microstructure and processing properties of 4J52 alloy

Microstructure of 4j52 alloy
The microstructure of the combined gold is stable austenite.

Grain size of 4j52
The grain size of alloy deep drawing strip should not be less than Grade 7, and the grain size less than Grade 7 should not exceed 10% of the area. When the average grain size of the strip with thickness less than 0.13MM is estimated, the number of grains along the thickness direction of the strip shall not be less than 8.

Formability of 4j52
The alloy is easy to be cold and hot worked. Hot working temperature should not be too high, heating time should not be too long, should avoid heating in sulfur-containing atmosphere. When the cold strain rate is higher than 75%, plastic anisotropy will be induced after annealing. When the cold strain rate is between 10% and 15% and heated to 950-1050 ℃, the grain size will grow significantly, which will reduce the plasticity of the alloy, and the vacuum tightness of the metal may be lost for the thin section. Therefore, the final strain rate of the finished product should be controlled at about 60% [2,5].

Welding performance of 4j52
The combined fittings have good weldability and can be brazed and spot welded. This group of alloys should be pre oxidized before sealing with soft glass and other materials.