Mottling/painted face appears on sintered products

Irregular color streaks in a powder metallurgy style. This problem is relatively common in sintering molding production and needs to be comprehensively analyzed and solved from multiple aspects of material, process, and equipment.

(1) Raw material characteristic aspect: Slight molecular weight or chemical differences between different particles in the powder cause different colors after sintering; the physical characteristics of the powder directly affect the preforming and sintering quality. (2) Process factor: Different degrees of local oxidation; this factor affects the '2079851475616104453 and final quality of the product. (3) Material aspect: Fluctuations in raw material performance indicators or insufficient pretreatment affect molding quality. (4) Process aspect: Deviations in the control of key process parameters cause the '2079851475616104453 to deviate from optimal conditions. (5) Equipment aspect: Equipment accuracy and maintenance status affect the stable execution of process parameters.

(1) Process operation: Ensure uniform mixing of the powder, optimize the stirring parameters to ensure uniform dispersion of each component, and avoid local concentration differences. (2) Implementation measure: Keep the sintering atmosphere stable and consistent, formulate specific operation plans in combination with actual production conditions, and verify the implementation effect. (3) Implementation measure: Improve the consistency of powder supply batches., formulate specific operation plans in combination with actual production conditions, and verify the implementation effect. (4) Preventive measure: Establish a sound process control standard and quality inspection system, and regularly review process data for continuous optimization.

This problem needs to be comprehensively analyzed from multiple dimensions of material, process, equipment, and operation, and solved by systematically optimizing process parameters and the quality control system.