BOZE CNC Ti | Heat Treatment

Stress-relief annealing of spring contacts

Stress-relief annealing of spring contacts capability for titanium components

Grade 1, Grade 2, Grade 5 (Ti-6Al-4V), Grade 7, Grade 9, Grade 23 Common Grades
Furnace: Ø600 × 1200 mm; up to 500 kg load Thickness Range
+0.01 mm (wire diameter) / +0.1 mm (free length) Cutting Tolerance
+0.01 mm (wire diameter) / +0.1 mm (free length) Tolerance
Ra 0.4 µm (no surface defects) Surface Finish
Titanium Coilover Spring Titanium Spring Lock Washer (DIN 127)

What is Stress-relief annealing of spring contacts?

Stress-relief annealing of spring contacts capability for titanium components

Vacuum heat treatment capability for Stress-relief annealing of spring contacts, with programmable temperature profiling, inert gas cooling, and metallographic verification.

Engineering Parameters & Capabilities

Vacuum heat treatment of titanium in a controlled environment prevents oxygen/nitrogen pickup that causes alpha-case embrittlement. Programmable temperature profiles with inert gas fan cooling enable solution treatment, aging, stress relief, and annealing in a single cycle, specifically for springs. Precision springs for general and aerospace applications present unique challenges: consistent wire diameter (±0.01 mm) and coil spacing. Fatigue life > 10⁷ cycles is required for aerospace springs. Surface defects (seams, pits) cause early failure.

Parameter Specification
Atmosphere Vacuum < 10⁻⁵ torr
Cooling Inert gas fan cooling (2 bar Ar); oil/water quench
Max Temp 1200°C (beta solution treatment)

Engineering Capabilities & Limits

Vacuum heat treatment capability for Stress-relief annealing of spring contacts, with programmable temperature profiling, inert gas cooling, and metallographic verification.

Hole Types Supported

N/A

Heat Control Measures

Graphite heating elements with molybdenum radiation shields. Partial pressure argon backfill during cooling for uniform thermal distribution.

Flatness & Stress Relief

Ceramic or titanium fixtures maintain component geometry during thermal cycling. A controlled cooling rate minimizes thermal gradient distortion.

Tolerance

+0.01 mm (wire diameter) / +0.1 mm (free length)

Typical Applications & Components

This process is used to manufacture the following titanium components.

Titanium Coilover Spring

Grade 5 Ti-6Al-4V Automotive & Motorsports

Titanium Spring Lock Washer (DIN 127)

Grade 5 Ti-6Al-4V General Industrial

Secondary Operations & Downstream Processing

Enhance your component with our integrated downstream services:

Hardness Testing

Rockwell C or Vickers hardness verification post-treatment.

Metallographic Analysis

Microstructure examination per ASTM E112.

Shot Peening

Shot peening for stress-relief annealing of spring contact components.

Stress Relief

Stress relief for stress-relief annealing of spring contact components.

Fatigue Testing (S-N curve)

Fatigue testing (S-N curve) for stress-relief annealing of spring contact components.

Quality Assurance & Inspection

Inspection Items

  • Stress-relief annealing of spring contacts specific dimensional verification (CMM / vision)
  • Material grade verification (PMI / OES spectrometer)
  • Fluorescent Penetrant Inspection (FPI) per ASTM E1417

Quality Standards & Certifications

  • ISO 9001:2015 — Quality Management System
  • AS9100D — Aerospace Quality Management
  • ASTM B265 — Titanium Strip, Sheet, and Plate Standard

Frequently Asked Questions

What titanium grades are suitable for Stress-relief annealing of spring contacts?
Stress-relief annealing of spring contacts can be performed on Grade 1, Grade 2, Grade 5 (Ti-6Al-4V), Grade 7, and other grades. The specific grade selection depends on the required mechanical properties, corrosion resistance, and end-use application requirements.
What tolerances can be achieved with Stress-relief annealing of spring contacts?
Typical achievable tolerances for Stress-relief annealing of spring contacts are +0.01 mm (wire diameter) / +0.1 mm (free length). Tighter tolerances may be possible depending on part geometry, material condition, and quantity. Our engineering team reviews each project to determine the optimal tolerance-cost balance.
What quality certifications apply to Stress-relief annealing of spring contacts?
All Stress-relief annealing of spring contacts operations are performed under ISO 9001:2015 — Quality Management System, AS9100D — Aerospace Quality Management, ASTM B265 — Titanium Strip, Sheet, and Plate Standard certified quality management systems. Full traceability documentation, material certifications (EN 10204 3.1), and inspection reports are provided with each shipment.
What is the typical lead time for Stress-relief annealing of spring contacts projects?
Lead times for Stress-relief annealing of spring contacts vary by complexity and quantity. Prototype quantities (1-10 units) can typically be completed in 3-7 business days. Production quantities require 15-25 business days. Rush orders are available for qualifying projects. Contact our sales team for a specific timeline.
Can you provide DFM feedback for my Stress-relief annealing of spring contacts design?
Yes. We provide free Design for Manufacturability (DFM) analysis for all new projects. Simply upload your CAD file (STEP, DXF, or DWG format) and our engineering team will review your design and provide optimization suggestions within 24 hours.

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About Boze Titanium Manufacturing Center

One Metal. One Focus. Infinite Precision.

Founded in 2011 in Baoji's Titanium Valley, BOZE Metal is dedicated exclusively to titanium — from raw material to precision engineering. AS9100D, ISO 13485 & ISO 9001 certified with 500+ clients across Aerospace, Medical & Motorsport industries, we deliver end-to-end precision titanium CNC machining with full material traceability from source to component.

Boze CNC Ti is the dedicated titanium manufacturing center of Baoji Boze Metal Products Co., Ltd.

AS9100D ISO 13485 ISO 9001 500+ Clients 15+ Years OEM/ODM
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