What should I pay attention to about high-temperature forgings（二）

7. Cooling after forging

Cooling speed: slow cooling to maintain ductility; Rapid cooling (such as air or water) causes the structure to solidify but may introduce stress.

Deformation: If cooling is not controlled, the large ring with an outer diameter of 500mm is prone to warping.

What to do: Inquire about the cooling method (e.g., "Do you air cool 7075 rings?") and how they handle deformation.

8. Cost and Production Impact

Energy cost: Compared to cold forging, heating to 400 ° C+will increase production costs.

Mold cost: Customized molds used for hot forging are expensive, but reusable - cost-effective for bulk orders.

What to do: Specify the order size (e.g. 50 rings) and ask how high-temperature forging affects pricing and delivery time (e.g. "What is the cost difference compared to cold forging?").

9. Testing and Quality Assurance

Standard: Hot forged 7075 rings typically comply with AMS 4126 or ASTM B247, especially with preheating treatment.

Test:

Ultrasonic testing (UT): Check whether there are pores inside the forging.

Microstructure analysis: Verify grain refinement.

Tensile testing: Confirm baseline strength.

What to do: Request specific testing (e.g. "Ultrasonic and Microstructure Report for 7075 Ring") and certification (SGS, BV, TUV, if required).

10. Professional knowledge of suppliers

Experience: Southwest Aluminum's more than 12 years of history and 70000 tons of production capacity demonstrate its expertise in hot forging.

Technical support: They can provide suggestions on the temperature, process, or post forging steps of 7075.

What to do: Utilize their professional knowledge - for example, "What is the optimal forging temperature for 7075 rings in the aerospace field

7075 Ring Example

If ordering 50 7075 forged rings with an outer diameter of 500mm for aerospace use:

Specification: "400-450 ° C hot forging, closed die, air-cooled, tolerance ± 0.5mm

Can you guarantee that this size will not crack? What tests can verify quality

Confirmation: If necessary, perform T6 treatment after forging, taking into account the impact of cost and schedule.

Why is this important

Quality: Precise control avoids defects and ensures that your ring meets aerospace grade standards.

Cost: Understanding the impact of processes can help you negotiate effectively.

Performance: Proper forging can optimize the strength of 7075 to meet your application needs.