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 Extrusion
Cold extrusion is a precision metal forming process that shapes material by forcing it through or around a die under high pressure at room temperature. Unlike cold heading, which upsets material...
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Bending and Forming
Bending and forming is a sheet metal fabrication process that uses press brakes and specialized tooling to create angled, channeled, and contoured profiles from flat sheet stock. Unlike stamping —...
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Deep Drawing
Deep draw stamping is a metal forming process that transforms flat sheet metal or tubular blanks into seamless, hollow components where the depth typically exceeds the diameter. The process uses a...
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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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Surface Grinding
Surface grinding uses a rotating abrasive wheel to produce flat surfaces with high dimensional accuracy and fine finish — removing oxide layers, correcting distortion, and preparing parts for...
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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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Shot Blasting
Shot blasting is a mechanical surface preparation process that propels spherical metal shot at high velocity (65–110 m/s) using a centrifugal wheel . The impact of the shot removes mill scale,...
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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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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.


















