Heat Treatment

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Heat Treatment

The Core of Durability Lies in the Heat

Three-Stage Precision Process

At Boxing, we employ a three-stage heat treatment process to ensure each cutting tool achieves a perfect balance of strength, toughness, and structural stability.

  • Hardening

    1. Oil quenching or high-frequency induction selected based on blade size/thickness

    2. Temperature precision within ±3°C (industry average ±10°C)

    3. Purpose: to convert the structure to fine martensite

  • Tempering

    1. Two-stage tempering with tightly controlled dwell time

    2. Reduces internal stress, transforms residual austenite, and enhances impact resistance

    3. Temperature fluctuation kept within ±5°C (industry standard ±15°C)

  • Hardening

    1. Cooled in liquid nitrogen at -196°C for 8-24 hours

    2. Refines grain structure, precipitates ultra-fine carbides, and minimizes residual austenite

Built on Equipment. Proven by Data.

Device Name

Features

Brand / Model

Vacuum Heat Treatment Furnace

Oxygen-free environment prevents decarburization

Aichelin High-Vacuum Type

Rockwell Hardness Tester

Accurate hardness testing

Mitutoyo HR-530

Metallographic Microscope

Grain structure observation / Residual phase analysis

Olympus GX53

 

  • Why It Matters

    1. Surface too brittle → easy chipping

    2. Incomplete quenching → blade softens or deforms

    3. Under-tempering → stress concentration → early cracking

    4. Excessive retained austenite → cold-state deformation and instability after use

    5. BOXING eliminates these risks through an SPC-based heat treatment monitoring system and microstructure inspections, ensuring zero batch deviation.

  • Added Value

    1. Customized heat treatment curves for extreme environments (e.g., 4,000m altitude, -30°C temperatures).

    2. Fatigue life assessment reports available — including high-magnification metallographic images.

    3. We also provide “secondary heat treatment” services to upgrade customer blades by optimizing tempering curves.