Waa maxay habka daaweynta kuleylka ee gelitaanka furaha ee A286?

Habka daaweynta kuleylka ee loo yaqaan 'kuleylka' ee loogu talagalay galinta qufulka furaha ee A286 ee ugu muhiimsan waxay ka kooban tahay laba marxaladood: Xalka xalka iyo gabowga. Xariiqyada geedi socodka gaarka ah iyo tillaabooyinka waa sida soo socota:

1. Xalka xalka
– U dhexeeya heerkulka: Caadi ahaan, heating at 982°C (1800°F) for one hour, followed by rapid cooling. Some standards recommend holding at 899°C for two hours, followed by rapid cooling.
– Cooling Method: Caadi ahaan, air cooling or oil quenching is used.
– Purpose: High-temperature heating dissolves carbides and nitrides in the alloy, resulting in a single-phase austenite structure, relieving processing stresses, and improving the toughness and ductility of the material.

2. Aging Treatment
– U dhexeeya heerkulka: 704-760°C (1300-1400°F).
– Holding Time: Caadi ahaan 12-16 hours, followed by air cooling.

3. Special Treatment
– Double Aging: In some cases, a double aging treatment is performed. This involves holding at 704/760°C for 16 hours, then air cooling to 649°C, holding for another 8-12 hours, and finally air cooling. This treatment further improves notch cracking strength while maintaining a balance between toughness and hardness.
– Dimensional Change: After aging, the material will shrink slightly, approximately 0.001 in/in.

4. Precautions
– Temperature Control: The temperatures of the solution and aging treatments must be strictly controlled to ensure optimal material properties.
– Cooling Rate: The cooling rate after solution treatment has a significant impact on material properties. Rapid cooling helps achieve a fine grain structure, thereby improving toughness.
– Repeated Aging: In some cases, multiple aging treatments may be necessary to further optimize material properties.

Through this heat treatment process, the A286 key locking insert achieves excellent high-temperature strength, corrosion resistance, and good processing properties, meeting the application requirements of demanding fields such as aerospace.