China Case Hardening Service Manufacturers Factory Suppliers
With the aggressive spirit, strict management, excellent Spheroidizing Annealing, Induction Heat Treatment, Selective Hardening and the support of our customers, our scale is growing day by day. We firmly believe that with our high-quality and low-cost Case Hardening Service, enthusiastic service attitude and perfect after-sales service, we will gain the trust of customers. We have top engineers in these industries and an efficient team in the research. We have a proven track record of success and growth. Facing the complex and changing market situation, we firmly establish the scientific concept that management innovation is the key to improve the core competitiveness of enterprises. Our team has a high degree of cohesion, progressive business philosophy, innovative spirit, outstanding talent and high dedication. We continuously improve the system and system according to the operation condition and environmental changes of the enterprise, and ensure the applicability and efficiency of the system and system. We offer comprehensive after-sales service and support.
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Carburizing
Carburizing is a thermochemical process that diffuses carbon atoms into the surface layer of low-carbon steels, increasing surface carbon content to approximately 0.8%. After quenching, this...
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Cold Heading
Multi-station cold heading is a high-speed metal forming process that shapes wire or rod stock into finished or near-finished components at room temperature through a sequence of extrusion,...
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Progressive Die Stamping
Progressive die stamping is a metal forming process that shapes sheet metal strip into finished components through a series of stations within a single die set. Each station performs a specific...
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Fine Blanking
Fine blanking is a specialized stamping process that produces parts with fully sheared, smooth edges across the entire material thickness — eliminating the fracture zone typical of conventional...
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CNC Turning
CNC turning produces cylindrical components with ±0.02mm accuracy — from Φ2mm pins to Φ500mm shafts, up to 1000mm in length. We machine stainless steel, carbon steel, alloy steel, aluminum, and...
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Spline and Gear Hobbing
Hobbing is a continuous generating process that uses a helical cutting tool — the hob — to produce splines, spur gears, and helical gears with consistent tooth geometry across production runs....
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Spheroidizing Annealing
Spheroidizing annealing transforms the lamellar carbide structure in steel into a spheroidal (globular) form through controlled heating and slow cooling. This reduces hardness, improves...
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Induction Hardening
Induction hardening uses electromagnetic induction to heat specific surface areas of a part — with heating times measured in seconds — followed by immediate water or polymer quenching. The rapid...
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Tempering
Tempering is a mandatory post-quenching heat treatment. Fresh martensite is hard but brittle, with high residual stress. Without tempering, a quenched part is prone to cracking or fracture in...
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Sand Blasting
Sandblasting is an abrasive blasting process that propels sand or other abrasive media against a surface under high pressure, typically using compressed air . The process removes surface...
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Cold Extrusion Dies
We design, manufacture, and maintain cold extrusion dies entirely in-house — from geometry definition to carbide selection, heat treatment, surface coating, and ongoing repair. This vertical...
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Isothermal Forging Dies
We design, manufacture, and maintain isothermal forging dies entirely in-house — from geometry definition to high-temperature tool steel selection, heating system integration, surface engineering,...
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We strive to produce superior Closed Die Forging, Precision Laser Cutting with reliable quality that consumers and we expect together, and shape our good brand image. Ningbo Fenghua Bolong Machinery Manufacturing Co., Ltd. is one of the most professional case hardening service manufacturers and suppliers in China, also supports high quality customized service. With abundant experience, we warmly welcome you to buy durable case hardening service made in China here from our factory.


















