Surface Finishing Heat Treatment

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Jan.01,1970
TC Precision Engineers More Durable Balloon Mold for 24,000+ Hours of Reliable Production
Established to better serve international customers, our Shenzhen office focuses on engineering communication, design collaboration, project coordination, and professional support before production begins.

Jan.01,1970
TC Precision Engineers More Durable Balloon Mold for 24,000+ Hours of Reliable Production
Established to better serve international customers, our Shenzhen office focuses on engineering communication, design collaboration, project coordination, and professional support before production begins.

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Jan.01,1970
TC Precision Engineers More Durable Balloon Mold for 24,000+ Hours of Reliable Production
Established to better serve international customers, our Shenzhen office focuses on engineering communication, design collaboration, project coordination, and professional support before production begins.

Jan.01,1970
TC Precision Engineers More Durable Balloon Mold for 24,000+ Hours of Reliable Production
Established to better serve international customers, our Shenzhen office focuses on engineering communication, design collaboration, project coordination, and professional support before production begins.
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Jan.01,1970
TC Precision Engineers More Durable Balloon Mold for 24,000+ Hours of Reliable Production
Established to better serve international customers, our Shenzhen office focuses on engineering communication, design collaboration, project coordination, and professional support before production begins.

Jan.01,1970
TC Precision Engineers More Durable Balloon Mold for 24,000+ Hours of Reliable Production
Established to better serve international customers, our Shenzhen office focuses on engineering communication, design collaboration, project coordination, and professional support before production begins.

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TC Precision — Surface Finishing

Process	Sub-Process / Type	Applicable Materials	Typical Thickness / Removal	Appearance / Surface Result	Primary Function	Typical Capability	Reference Standard / Acceptance Basis	Engineering Notes
Anodizing	Type II — Clear	Aluminum & aluminum alloys	Typical 5–25 μm; exact thickness per drawing/specification	Clear / natural aluminum appearance	Corrosion resistance, electrical insulation, decorative finish	Color: clear/natural; dimensional effect controlled per drawing	MIL-PRF-8625 Type II; ASTM B580 where applicable	Actual thickness depends on alloy, bath and specified class.
Anodizing	Type II — Dyed	Aluminum & aluminum alloys	Typical 5–25 μm; exact thickness per drawing/specification	Black, red, blue and other specified colors	Corrosion resistance, appearance	Color per approved sample / RAL where applicable	MIL-PRF-8625 Type II, Class 2	Color matching varies by alloy and lot.
Hard Anodizing	Type III — Clear / Natural	Aluminum & aluminum alloys	Typical 25–50+ μm; exact thickness per drawing/specification	Hard matte / gray to dark gray	Wear resistance, corrosion resistance, electrical insulation	Hardness and thickness per specification	MIL-PRF-8625 Type III	Masking and dimensional allowance should be defined before machining.
Hard Anodizing	Type III — Dyed / Black	Aluminum & aluminum alloys	Typical 25–50+ μm; exact thickness per drawing/specification	Dark gray / black	Wear resistance and appearance	Color and thickness per drawing/specification	MIL-PRF-8625 Type III	Color uniformity depends on alloy and coating thickness.
Micro-Arc Oxidation	MAO / PEO	Aluminum, magnesium and selected titanium alloys	Typical 20–80 μm; process dependent	Ceramic-like matte surface	Wear, corrosion and thermal protection	Thickness/hardness per process qualification	Customer specification / applicable PEO specification	Do not treat MAO as MIL-PRF-8625 Type II/III anodizing.
Electroless Nickel	Medium / High Phosphorus	Steel, stainless steel, aluminum and selected alloys	Typical 5–25 μm; 3 μm+ possible for selected applications	Uniform metallic finish; bright to satin	Corrosion, wear, dimensional build-up	Thickness, phosphorus content and hardness per specification	ASTM B733; customer specification	Aluminum requires appropriate zincate/pre-treatment.
Electroless Nickel	Black Electroless Nickel	Selected metals with qualified pretreatment	Typical 5–20 μm; process dependent	Black / dark satin	Appearance, corrosion and wear protection	Color and thickness per specification	ASTM B733 + coating supplier/customer specification	Black EN is system-specific; verify exact chemistry and topcoat.

TC Precision — Heat Treatment

Heat Treatment Process	Applicable Materials	Typical Hardness / Condition	Case / Hardened Depth	Primary Purpose	Typical Capability	Reference / Quality Basis	Engineering Notes
Annealing	Carbon, alloy, stainless, tool steels; material-specific	Softened / annealed condition	N/A	Reduce hardness, relieve stress, improve machinability	Temperature/time per material specification	Material specification / customer drawing; ISO 20431 for quality control	Do not use ASTM A991 as the annealing process standard.
Normalizing	Carbon and low-alloy steels	Normalized condition	N/A	Refine grain structure and homogenize microstructure	Material-specific cycle	Material specification / customer drawing	Process temperature depends on steel grade.
Quenching	Carbon and alloy steels	Grade-specific quenched hardness	N/A	Increase hardness by controlled rapid cooling	Oil / water / polymer as qualified	Material specification / customer drawing	Quench medium and agitation affect distortion and cracking.
Tempering	Hardened carbon/alloy/tool steels	Grade-specific tempered hardness	N/A	Adjust hardness/toughness after quenching	Temperature/time per grade	Material specification / customer drawing	Usually performed after hardening/quenching.
Quench & Temper	4140, 4340 and selected alloy steels	Typically ~28–50 HRC, grade dependent	N/A	Balanced strength and toughness	Hardness per drawing	Material specification / customer drawing	Actual hardness range must be specified by grade and condition.
Carburizing	Low-carbon alloy steels	Hard case + tough core	Typical effective case depth ~0.5–1.5 mm; specification dependent	High wear and fatigue resistance	Case depth and surface hardness per drawing	Material/process specification	Specify effective case depth, not film thickness.
Carbonitriding	Low-carbon steels / selected alloy steels	Hard case + tough core	Typical effective case depth ~0.3–0.8 mm; specification dependent	Wear and fatigue resistance on smaller parts	Case depth/hardness per drawing	Material/process specification	Depth depends on cycle and steel chemistry.

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