Most of the high-temperature springs are made of stainless steel materials such as 304 and 305. Although stainless steel has strong anti-rust properties, in terms of metal characteristics, our technical support will definitely require anti-rust surface treatment for high-temperature springs. One aspect is that our surface treatments are not only protective but also aesthetically enhanced.
No matter which aspect, our high temperature spring surface treatment process is not a project that can be ignored.
The operating environment of the high temperature spring has no strong solvent odor, less air pollution, and the wastewater treatment and discharge process is simple. It only needs to adjust the resin of the PH sedimentation electrophoresis paint, and then discharge the clean water.
We designed the process flow for a domestic manufacturer: forming spring → shot peening → → upper hanger → alkaline degreasing → double water washing → (slight acid 1% neutralization) phosphating → double water washing → double deionized water washing → cathode system Polyurethane colorful electrophoretic paint → retraction → double water washing → auxiliary washing → baking and curing → lower hanger.
Results: The particles of shot peening will be caught in the gaps at both ends of the high temperature spring, the shot peening will cause a rough surface, and the paint layer should be thickened accordingly, so as to have a bright and flat appearance, with a thickness of 10-20 microns, which will cause the spring to stretch. The shortened thickness becomes smaller, and phosphating will cause hydrogen embrittlement and reduce the service life of the stainless steel spring.
Improvement process: forming spring → lye degreasing → centrifugal water drop → hanging → alkaline degreasing → double water washing → (slight acid neutralization 1%) phosphating → double water washing → double deionized water washing → cathode system Polyurethane colorful electrophoretic paint → retraction → double water washing → auxiliary washing → baking and curing → lower hanger.
The finishing (finishing) process is to put the high-temperature spring directly into a series of finishing machines such as skew centrifugal or helical oscillation, eddy current, etc., and add appropriate abrasives, abrasives and water for finishing and finishing. The post-appearance is smoother than the shot-peened one.
In addition, traditional processes such as degreasing, cleaning, pickling, phosphating, dehydrogenation, etc. are reduced, the production process is simplified, and the rust of the spring is less in the production process, so it is not necessary to pickle. The thickness of the paint on the exterior can be controlled at about 10 microns.
