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Prevention and Control of Excessive Residual Stress in Heat Treatment: Multi-Process Collaborative Stress Relief

2026-02-28

Excessive residual stress is an important cause of subsequent machining deformation of workpieces and cracking during service. Especially after heat treatment of thick-walled workpieces and complex structural parts, the peak residual stress can exceed 500MPa, which seriously affects the dimensional stability of products. The core causes are uneven temperature gradient during heating and cooling, and inconsistent phase transformation volume change, leading to failure in timely stress relief.

The systematic prevention and control solutions include:

Adopt a segmented heating process, changing the traditional single-stage heating to the mode of "room temperature → 300℃ (holding for 2h) → target temperature (holding)", so as to reduce the thermal stress caused by temperature gradient.
Optimize the tempering process: perform timely tempering within 2h after quenching. The tempering temperature is set according to material characteristics (recommended 550-600℃ for medium carbon steel, 600-650℃ for alloy steel), and the holding time is extended to 4-6h to release residual stress through atomic diffusion.
Introduce auxiliary stress relief technologies: adopt vibratory stress relief (vibration frequency 20-100Hz, amplitude 0.1-0.5mm) for high-precision workpieces, or adopt deep cryogenic treatment (holding at -80℃ to -120℃ for 2-4h), so that the residual stress relief rate can be increased to more than 80%.

Комната 13A07, 14-й этаж, Tieshi Holding Tower, No 471 Xinhua Road, район Цзянхан, город Ухань, провинция Хубэй, Китай. E-mail: hbeikyn@163.com Tel: 18971549433 Tel: 18971549433

Крупнейшие научно-исследовательские и производственные предприятия Industrial Heat Treatment Furnace Поставщик в Китае

8618971549433

18971549433

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Prevention and Control of Excessive Residual Stress in Heat Treatment: Multi-Process Collaborative Stress Relief