Heat Treatment Services: Harden, Temper & Stress-Relieve
Heat treatment transforms the mechanical properties of metal parts—hardening, tempering, annealing, and stress-relieving to achieve the strength, wear resistance, and dimensional stability a component needs in service. For tooling, gears, and structural parts, the right heat-treat cycle is what makes the part perform. This guide covers common processes, when to specify them, the materials involved, and how to brief your supplier.
How Heat Treatment Works
Heat treatment uses controlled heating and cooling to change a metal’s microstructure. Hardening heats steel above its transformation point then quenches it; tempering reheats to trade a little hardness for toughness; annealing softens for machining; stress-relieving stabilizes dimensions after rough machining. We sequence it with CNC machining—rough machine, heat treat, then finish machine to hold tight tolerances.
Heat Treatment vs. Other Strengthening
Unlike cold working (which hardens by deformation) or alloying (which builds strength into the material), heat treatment is a post-process that’s reversible and tunable. It’s often combined with CNC grinding so hardened parts reach final size and finish.
Materials We Treat
- Carbon and alloy steels — the classic hardening candidates.
- Tool and die steels — for maximum wear resistance.
- Stainless steels — precipitation hardening and annealing.
- Cast iron — stress relief and hardening.
- Aluminum alloys — solution treat and age (T-series tempers).
Industries That Rely on Heat Treatment
Automotive drivetrain, aerospace structures, cutting tools, and molds all depend on heat-treated parts for life and reliability. Getting the cycle right is the difference between a part that lasts and one that fails.
How to Spec Your Heat Treatment Job
- Name the process and target (e.g., harden & temper to 40–45 HRC).
- State the material grade and any spec (AISI, DIN).
- Flag distortion-sensitive features so we plan machining sequence.
- Define hardness testing locations and acceptance range.
- Note certifications needed (material certs, process records).
FAQ
Will heat treatment distort my part?
Some movement is normal; we rough-machine first and finish after treat to hold tolerances.
Can you harden stainless?
Yes—precipitation-hardening and certain martensitic grades respond well.
Do you provide hardness certificates?
Yes, with documented process parameters on request.
Why Choose Huaxiao for Heat Treatment
Our heat treatment service is integrated with machining and grinding, so your part is processed, verified, and finished without extra logistics. Tell us your performance target and we’ll specify the cycle.
