The Top Chinese Heat Treatment Solutions Partner

We Offer a Variety of Heat Treatment for Custom Parts

High-quality heat treatment services enhance both their physical and mechanical properties of your products.

Our heat treatment services cover most manufacturing processes, including CNC machining, sheet metal fabrication, 3D printing, injection molding, casting, and more.

What’s Heat Treatment?

Heat Treatment is a controlled process of heating and cooling solid materials to alter their physical and mechanical properties, say process of enhancing the hardness, ductility and fatigue resistance, wear resistance or machinability without changing the product’s shape.

Elevate the quality of your project today!

Benefits of Heat Treatment

Without heat treatment, some metal parts become too brittle. Heat treatment strengthens metals like steel and aluminum, which are widely used in aircraft, cars, and computers to ensure safety and performance.

It mainly improves shear strength, tensile strength, and toughness. Heat‑treated metals are stronger and more durable, reducing the need for frequent replacement of expensive parts.

Proper heat treatment also relieves internal stress, making metals easier to weld or machine. Key benefits include:

Increased strength with good ductility

Better wear resistance

Stress relief for easier machining/welding

Reduced brittleness

Improved electrical and magnetic properties

Heat Treatment Type

Heat to an appropriate temperature, keep warm, and slowly cool to soften the material, eliminate internal stress, homogenize chemical composition and structure, and prepare for subsequent processing or heat treatment.

Typical Applications: Pre treatment of forgings, castings, and welded parts, followed by re softening after cold work hardening.

Heat to austenitization temperature, keep warm, and cool in air.

Improvement of low-carbon steel enhances its machinability.

To obtain a martensitic or bainitic structure with high hardness and wear resistance, heat it above the critical temperature, hold it for a while, and then cool it quickly.

Typical Applications: All parts that require high hardness, such as cutting tools, molds, bearings, gears, etc

The process of obtaining high hardness on the surface of the work piece.

Surface quenching is to obtain a deeper hardened layer to withstand high contact stress or rolling loads, such as the tooth surface of gears.

The process of obtaining high hardness on the surface of the work piece.

Chemical heat treatment requires a surface that is extremely hard, while the core has high toughness to withstand impact loads, such as automotive transmission gears.

Why Choose RPD?

Professional CNC Machining, sheet fabrication, Injection Molding & rapid prototyping, Professional Services, Comprehensive A-Z Solutions.

Guaranteed Quality & Rigorous Inspection

Every component and mold is backed by our rigorous quality control system, utilizing CMMs and advanced metrology equipment. We provide full inspection reports to guarantee everything meets your specifications.

Advanced Technology & Broad Capabilities

Our workshop is equipped with 50 comprehensive range of 3, 4, and 5-axis CNC milling and turning centers, 6 swiss-type lathes,2 EDM devices, 30 injection machines from 100T-1200T, which enabling us to handle high-tolerance and complex geometries and a wide variety of materials.

Technical Partnership & Engineering Support

RPD provide 24/7 support all year round. We focus on building long-term, strategic partnerships as well. Our engineering/project team works closely with you to optimize designs for cost, performance, and manufacturability, adding value beyond simple production.

Wide Material/Project Experience

We have 16 yrs experience to provide material solutions, from various grades of aluminum and steel to plastics, ensuring the right material for your application.

Competitive Value & Cost Optimization

By leveraging our manufacturing efficiency and technical expertise, we identify and eliminate unnecessary costs, delivering high-quality machined parts that offer exceptional and a stronger competitivevalue to booster your business.

Speed & On-Time Delivery

We understand the critical importance of timelines. Our efficient production planning and proven processes are designed to deliver rapid turnaround without compromising on quality, ensuring your projects stay on schedule and delivery out your order as fast as 3–10 days. Our production order can get 95.8% on time delivery.

Our Manufacturing Capabilities

Aluminium

Stainless Steel

Steel

Brass

Copper

Bronze

Titanium

Zinc

Low/Mild Carbon Steel

PA/Nylon

POM

PEEK

PMMA

PEI

PPS

ABS

PET

PVC

Rubber/Silicone

HDPE

Carbon Fiber

As machined

Smooth

Anodizing

Sand Blasting

Polishing

Brushing

Black Oxide

Powder Coating

Teflon Coating

Painting

DLC

Passivation

PVD

Electroplating

Mirror Polishing

Heat treatment

Electropolishing

SPI Finish

Silk Screen

Alodine

Laser Engraving

Electroless Plating

Tumbling

Knurling

Custom Parts For Different Industries

Provide CNC Machining One-Stop Services for Different Industries

Would you like to start a project with us?

How to work with RPD?

Upload Design Drawing

DFM Analysis & Quote

Order Confirmation

Parts Delivered

FAQs About Heat Treatment Services

Why is heat treatment necessary for custom metal parts?

Raw metal materials and machined parts often contain internal residual stress, uneven hardness and unstable grain structure, which easily cause deformation, cracking, wear and fatigue failure during long-term operation. Professional heat treatment releases internal stress, uniforms material hardness, improves wear and impact resistance, and ensures dimensional stability of precision parts under high-load, high-frequency and high-temperature working conditions.

What heat treatment services do you offer?

Annealing (softening, stress relief)

Quenching & Tempering (hardness + toughness balance)

Case Hardening (carburizing / nitriding for wear resistance)

Vacuum Heat Treatment (no oxidation, bright finish)

Aging (for aluminum alloys)

contact our team: engineer@rpdmfg.com for more details

What materials can be heat treated?

Heat treatment is mainly applicable to iron-based and alloy metals. Processable materials include carbon steel, alloy steel, tool steel, mold steel, high-speed steel, stainless steel, titanium alloy and copper alloy. Aluminum alloy supports special aging and solution heat treatment to enhance structural strength. Non-metallic materials and pure low-carbon soft steel cannot obtain obvious hardness improvement through conventional heat treatment.

What heat treatment is suitable for steel mold parts?

General plastic molds adopt vacuum quenching and tempering to achieve HRC 40–55 hardness for wear resistance and dimensional stability. High-precision and long-life molds use nitriding treatment for ultra-hard surface layers and anti-corrosion performance. Large mold frames apply stress relief annealing to eliminate processing stress and prevent long-term deformation.

How to guarantee consistent hardness after heat treatment?

We implement full-process temperature monitoring and time parameter standardization for each batch. Raw material status, heating temperature, holding time and cooling speed are strictly matched according to material grade and target hardness. After processing, we conduct random hardness testing with Rockwell and Vickers hardness testers to ensure uniform and stable hardness of all finished parts.

What's the typical lead time?

Standard: 1-2 weeks. Rush service (24–48 hrs) is available upon request, depending on process complexity and furnace availability.

Can you provide one-stop machining + heat treatment solutions?

Absolutely. We integrate precision CNC machining, wire EDM, sheet metal fabrication, die casting and professional heat treatment services. We formulate customized process sequences of pre-stress relief, finishing machining and final hardening treatment according to part features, effectively avoiding superposition of processing stress and heat treatment deformation, improving overall part yield and reducing customer procurement costs.

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