Secondary Processing Services
Secondary Processing Services
Coordinated Secondary Operations, Finishing, and Heat Treatment
Machining and finishing planned around your final part requirements
Combining CNC precision machining with downstream processes gives you fewer suppliers to manage, fewer specification handoffs, and a simpler way to track your order.
HUANG LIANG PRECISION coordinates precision secondary operations, surface finishing, and heat treatment to suit each component. Process planning accounts for coating thickness, hardness, surface roughness, heat-treatment distortion, machining allowances, and inspection methods. Addressing these factors together helps limit dimensional variation and quality risks between operations, keeping the focus on your finished-part requirements through delivery.
Precision Secondary Operations
Secondary operations are selected according to dimensional tolerances, surface condition, and functional requirements, whether your part needs a closer fit, a smoother contact surface, or clear identification.
| Process | Primary Purpose | Typical Requirements |
|---|---|---|
| Grinding | Refines dimensional accuracy, flatness, and surface finish | Tight-tolerance dimensions and precision mating components |
| Polishing | Reduces surface roughness and improves appearance | Visible components, sliding surfaces, and specified surface finishes |
| Laser Marking | Applies text, graphics, serial numbers, or identification marks | Part identification, batch traceability, and custom markings |
| Thread-Locking Treatments | Helps threaded joints resist loosening in service | Fastened assemblies exposed to vibration, loading, or extended use |
Surface Finishing Options
The appropriate finish depends on the base material, service conditions, and the properties your component needs. Options address corrosion protection, wear resistance, surface hardness, electrical contact performance, and appearance.
| Process | Primary Purpose | Typical Requirements |
|---|---|---|
| Gold Plating | Provides a corrosion-resistant contact surface that helps maintain stable electrical performance | Electrical contacts and precision connector components |
| Nickel Plating | Improves corrosion protection, wear resistance, and appearance | Hardware, mechanical components, and electronic parts |
| Chrome Plating | Provides surface hardness, wear resistance, or a bright finish, depending on the plating specification | Mechanical wear surfaces and decorative components |
| Tin Plating | Improves solderability and corrosion resistance | Electrical terminals and conductive components |
| Anodizing | Increases aluminum surface hardness and corrosion resistance, with decorative finish options | Aluminum alloy components |
| Stainless Steel Passivation | Removes free iron contamination and supports the stainless steel surface’s passive protective layer | Components for medical equipment, food-processing machinery, and precision equipment |
| PTFE Coating | Reduces friction and provides chemical resistance and non-stick properties | Sliding components, sealing applications, and release surfaces |
| PVD / TiN Coating | Increases surface hardness and wear resistance to help extend service life | Components subject to abrasive wear or high contact loads |
| Hot-Dip Galvanizing | Protects steel and iron components against rust and weather exposure | Outdoor components and parts exposed to corrosive conditions |
| Painting and Metal Coloring | Adds color, visual identification, and surface protection according to the finish selected | Visible parts and components requiring custom colors |
Heat Treatment Options
Controlled heating, holding, and cooling modify a metal’s microstructure and mechanical properties. The treatment is chosen to achieve the required balance of hardness, toughness, wear resistance, fatigue performance, and dimensional stability for the specified material.
| Process | Primary Purpose | Typical Requirements |
|---|---|---|
| Ferritic Nitrocarburizing / Salt Bath Nitrocarburizing | Increases surface hardness, wear resistance, and fatigue resistance | Shafts, gears, and sliding components |
| Carburizing / Gas Carburizing | Produces a hard surface case after quenching while retaining a tough core | Gears, shafts, and heavily loaded components |
| Carbonitriding | Develops a hard, wear-resistant case with improved fatigue performance | Small precision mechanical components |
| High-Frequency Induction Hardening | Hardens selected surface areas to improve localized wear resistance | Shafts, pins, and parts with specific wear zones |
| Quenching and Tempering | Adjusts hardness, strength, and toughness through hardening followed by tempering |