Powder dampness causes sintering foaming

Wet powder produces a large number of bubbles during sintering after preforming. 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: The powder absorbs moisture during storage; the physical characteristics of the powder directly affect the preforming and sintering quality. (2) Temperature parameter aspect: The water content vaporizes at the sintering temperature; temperature deviations directly affect the physical and chemical state of the material and the reaction process. (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) Implementation measure: Store the powder in a sealed manner, formulate specific operation plans in combination with actual production conditions, and verify the implementation effect. (2) Material selection: Dry at low temperature in an oven before use (PTFE about 120℃/2h), establish material selection evaluation standards, and determine the optimal plan through comparative tests. (3) Implementation measure: Establish a powder moisture content testing standard., 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.