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Hubei CAILONEN Intelligent Technology Co., Ltd

Hubei Cailonen Intelligent Technology Co., LTD. (formerly Wuhan Electric furnaceFactory) is the designated professional, design and research of the Ministry of Machinery Industry Development, production and sales of industrial electric furnaces large-scale state-owned restructuring enterprises Industry, is the China Heat Treatment Association, Hubei Casting Association, WuHan forging industry association governing unit. Since the restructuring of the company, it has rapidly grown into a Chinese high-end heat treatment manufacturing enterprise with strong research and development strength, complete design software, advanced processing technology and complete production equipment, with an annual output of 500 sets of large-scale standard heat treatment equipment and 30 sets of non-standard production lines. Many years of experience in the industry, in cooperation with a number of well-known universities in China, the existing professional team R & D is committed to providing customers with professional solutions. The main products are: Intelligent tempering production line, new energy lithium battery anode material granulation pre-carbonization production line, new energy vehicle lightweight thermoforming production line, new energy ling production line, all-fiber electric heating trolley furnace, all-fiber gas heat treatment (forging) trolley furnace, large variable capacity trolley furnace, protective atmosphere box tempering production line, hanging cylinder liner tempering production line, microcomputer controlled carburizing/nitriding furnace Vacuum furnace, well furnace, mesh furnace, roller sintering furnace, aluminum alloy quenching (solution, aging) furnace, all hydrogen hood bright annealing furnace, ADI salt isothermal quenching production line, rotary kiln baking furnace, medium frequency furnace, high frequency furnace, induction melting furnace, induction hardening production line, and other standard and non-standard heat treatment equipment. According to the requirements of users, we can provide a full set of technology and services such as product heat treatment process plan formulation, heat treatment workshop design, heat treatment equipment selection and design and manufacturing, installation and commissioning, production operation, after-sales maintenance, etc., to ensure the safety and reliability of customers before and after using products. Products involved in aerospace, shipbuilding, iron and steel, metallurgy, chemical industry, ceramics, automobile, casting, forging, sanitary ware, mining....... And other fields. Solutions can be developed according to different application scenarios and requirements.

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Nitriding vs. Carburizing: How to Choose a Metal Surface Hardening Process? Understand Core Differences at a Glance 2025-11-27 Nitriding vs. Carburizing: How to Choose a Metal Surface Hardening Process? Understand Core Differences at a Glance In the surface strengthening of metal components, nitriding and carburizing are the two most widely used processes. Both form a hardened layer on the workpiece surface through "atomic diffusion," but they differ significantly in processing temperature, cycle time, and performance outcomes. A wrong choice not only increases costs but may also lead to early product failure. This article breaks down the core differences between the two processes to help you accurately match production needs. I. Process Principles: Differences in "Temperature and Elements" of Atomic Diffusion Carburizing: At a high temperature of 850-950℃, carbon atoms diffuse into the surface layer of low-carbon steel or low-alloy steel, forming a high-carbon hardened layer (typically 0.5-2.0mm thick). Carbon atoms combine with iron to form martensite, significantly improving surface hardness (up to HRC 58-64). Nitriding: At a medium-low temperature of 500-570℃, nitrogen atoms diffuse into the metal surface layer (commonly used materials: alloy steel, stainless steel), forming a nitride hardened layer (0.1-0.5mm thick). It achieves higher surface hardness (up to HV 800-1200) without the need for subsequent quenching. II. Core Performance Comparison: Pros and Cons in 4 Dimensions Comparison Dimension Carburizing Process Nitriding Process Processing Temperature High (850-950℃) Medium-Low (500-570℃) Process Cycle Shorter (4-12 hours) Longer (10-40 hours) Hardened Layer Thickness Thicker (0.5-2.0mm) Thinner (0.1-0.5mm) Deformation Degree Higher (thermal deformation at high temperature) Minimal (low-temperature processing, low internal stress) Corrosion Resistance Average (requires subsequent rust prevention) Excellent (dense nitride layer with inherent rust resistance) Suitable Materials Low-carbon steel, low-alloy steel Alloy steel, stainless steel, cast iron III. Application Scenarios: Precise Matching Based on Needs Choose Carburizing: Ideal for components subjected to heavy loads and severe friction, such as automotive transmission gears, engine crankshafts, and construction machinery chains. The thick hardened layer resists long-term impact and wear, and high-temperature processing enables efficient mass production. Choose Nitriding: Suitable for precision components requiring high dimensional accuracy and corrosion resistance, such as precision molds, hydraulic valves, and aerospace fasteners. Minimal deformation eliminates the need for subsequent calibration, and inherent rust resistance reduces surface treatment costs. IV. 3 Key Tips for Process Selection For low-carbon steel workpieces, prioritize carburizing (nitriding yields poor results); for alloy steel or stainless steel, nitriding is preferred. Precision components (e.g., tolerance ≤0.01mm) are recommended to use nitriding to avoid high-temperature deformation from carburizing. Choose carburizing for efficient mass production; opt for nitriding for small-batch customization and high-value-added products.

Gas Nitriding Heat Treatment: Core Principles, Application Tips and Performance Optimization 2025-11-25 Gas Nitriding Heat Treatment: Core Principles, Application Tips and Performance Optimization In the field of metal processing, surface strengthening technology is crucial for extending the service life of mechanical components—especially for parts subjected to friction, corrosion, or cyclic loads. Among various surface treatment technologies, gas nitriding stands out for its ability to significantly improve surface hardness, wear resistance, and corrosion resistance without compromising the core toughness of workpieces. Furthermore, with its advantages of low deformation, high efficiency, and environmental friendliness, it has become the mainstream surface treatment solution in industries such as automotive manufacturing, mold making, and mechanical engineering. This article will break down the core principles, practical application scenarios, process optimization strategies, and key equipment selection points of gas nitriding, providing actionable technical references for manufacturing professionals. The working principle of gas nitriding is concise and precise: ammonia (NH₃) is introduced into a sealed furnace at a temperature range of 500-650℃ (with 550-600℃ being the typical operating temperature for most steel grades). Under thermal activation, ammonia dissociates into atomic nitrogen (N) and hydrogen (H₂). The atomic nitrogen then diffuses into the workpiece surface and forms nitride compounds (such as Fe₄N and Fe₂N) with iron and alloying elements (chromium, molybdenum, aluminum, etc.). This process forms a thin yet hard nitrided layer (usually 0.1-0.6 millimeters thick) with a microhardness of 800-1200HV. While significantly enhancing surface performance, it maintains the original core structure of the workpiece—effectively avoiding deformation risks associated with high-temperature heat treatment, making it particularly suitable for processing high-precision components. One of the notable advantages of gas nitriding is its cross-industry versatility. In the automotive industry, it is widely applied to crankshafts, piston rings, transmission gears, and valve lifters: the nitrided layer reduces friction between moving parts, lowers fuel consumption, extends component service life by 2-3 times, and withstands the harsh high-temperature and high-pressure conditions of engines. For precision molds (injection molds, stamping molds, die-casting molds), gas nitriding enhances the wear resistance and anti-seizure properties of mold cavities, preventing surface scratches and sticking, reducing maintenance frequency and downtime. This is crucial for mass production and can significantly lower overall production costs. In the construction machinery sector, components such as excavator pins and hydraulic valve cores retain excellent corrosion and wear resistance in humid, dusty environments after nitriding. Even motorcycle brake pads and industrial mechanical gear shafts can operate stably in complex environments with nitrided surfaces, eliminating the need for additional coating protection. To achieve optimal nitriding results, process control is paramount. Firstly, material selection is critical: alloy steels containing chromium (Cr), molybdenum (Mo), or aluminum (Al) (e.g., 38CrMoAl, 42CrMo, 12CrNi3A) yield the best results. These elements form stable alloy nitrides with nitrogen atoms, greatly improving nitrided layer performance. While carbon steel can be nitrided, the resulting layer is thinner and less durable, often requiring optimization through pre-carburization or other methods. Secondly, pre-treatment is indispensable: workpieces must undergo thorough degreasing (via solvent cleaning, alkali cleaning, or thermal cleaning), rust removal, and polishing to a surface roughness of Ra ≤ 0.8μm using grinding wheels or polishing equipment. Oil, rust, or scale will hinder nitrogen diffusion, leading to uneven nitrided layers, poor adhesion, or even peeling—severely affecting treatment quality. Furnace operating parameters directly influence treatment outcomes. Temperature uniformity is a core requirement—temperature variations exceeding ±5℃ will cause inconsistent hardness across different parts of the workpiece. Modern pit-type gas nitriding furnaces typically adopt multi-zone temperature control and intelligent hot air circulation systems, combined with furnace pots featuring excellent sealing performance, to control internal temperature variation within ±1℃, ensuring nitrided layer uniformity. Ammonia flow rate (usually 0.5-1.5 m³/h per m³ of furnace volume) and decomposition rate (controlled at 30%-60%) must be flexibly adjusted based on workpiece material and required nitrided layer depth: excessively high decomposition rates reduce nitrogen utilization, resulting in thinner nitrided layers; excessively low rates lead to excessive ammonia residue, potentially causing surface contamination or excessive white layer formation. For complex-shaped parts (e.g., hollow shafts, porous components, special-shaped molds), adding methanol or ethanol as a carrier gas not only regulates furnace carbon potential but also promotes uniform nitrogen diffusion, avoiding local nitrided layer deficiencies. Post-nitriding treatment is equally important. Workpieces should be slowly cooled to below 200℃ in the furnace (or under inert gas protection) before being removed to avoid thermal stress from excessive temperature differences—rapid cooling may cause brittle nitrided layer cracking or workpiece deformation. No additional heat treatment is required, but precision grinding or polishing may be necessary to achieve final dimensional accuracy (note: grinding depth should not exceed 0.05 millimeters to avoid damaging the nitrided layer). Regular furnace maintenance is also essential, such as periodic cleaning of deposits in the furnace pot, replacement of sealing gaskets, and calibration of temperature sensors and ammonia flow meters. This ensures stable equipment performance, prevents ammonia leakage, and guarantees consistent treatment quality. The impact of equipment selection on nitriding results cannot be ignored. Choosing a pit-type gas nitriding furnace with an intelligent temperature control system enables automatic temperature curve storage, precise process parameter regulation, and historical data tracing, reducing human intervention errors. Equipment adopting energy-saving furnace linings (e.g., composite structures of 0.6g/cm³ ultra-light high-strength refractory bricks + aluminum silicate fiber) reduces energy consumption by over 35% compared to traditional furnaces, offering greater cost advantages in long-term use. Furnaces equipped with double sealing and waste gas treatment devices not only prevent safety hazards from ammonia leakage but also ensure compliance with environmental requirements through emission-standard waste gas discharge. Common misunderstandings in practical applications should be avoided: over-nitriding (excessively long nitriding time causes excessive surface brittleness, affecting workpiece impact resistance) and neglecting material preheating (directly placing cold workpieces into the furnace leads to uneven nitrogen diffusion—preheating to 200-300℃ before raising to nitriding temperature is recommended). Additionally, the appropriate nitrided layer depth should be selected based on actual workpiece operating conditions (deeper is not always better; 0.2-0.4 millimeters typically meets most application needs). For high-precision, high-demand parts, controlled gas nitriding or ion nitriding processes can be used to more accurately control nitrided layer depth and hardness gradient. However, gas nitriding remains the most cost-effective choice for mass production.

Pit-Type Gas Nitriding Furnace 2025-11-25 Pit-Type Gas Nitriding Furnace ※ Equipment Application This furnace is an energy-saving periodic operation furnace independently developed by our company, focusing on high-precision gas nitriding heat treatment processes. It is mainly applicable to the surface strengthening of various workpieces such as steel mechanical parts, automobile crankshafts, automobile piston rings, motorcycle brake pads, and precision molds. The operating temperature is accurately controlled at 650℃. After treatment, the surface hardness, wear resistance, and corrosion resistance of workpieces are significantly improved, effectively extending the service life of products. The product adopts an energy-saving furnace lining + double water-cooled furnace pot cover design, combined with a vacuum rubber sealing structure and upper-lower zone independent temperature control or multi-zone precision temperature control system, whose core performance reaches the advanced level in the industry. The equipment shell is welded with high-quality steel plates and section steels, featuring high strength and excellent sealing performance. The furnace lining is built with 0.6g/cm³ ultra-light and high-strength energy-saving refractory bricks; the outer layer is compounded with aluminum silicate fiber felt, and the middle layer is filled with expanded vermiculite powder to form a triple thermal insulation structure. Compared with traditional equipment, its thermal insulation efficiency is improved by more than 40%, greatly reducing energy consumption. The heating element is made of high-temperature resistance wire wound into a spiral shape, which is accurately installed on the furnace lining support bricks to ensure uniform and stable heat generation. The furnace cavity is equipped with a high-quality stainless steel furnace pot to ensure a clean heat treatment environment. The furnace cover is equipped with a double-head stainless steel dropper for precise methanol dripping; combined with the built-in hot air circulation system, it realizes the uniform distribution of temperature and atmosphere in the entire furnace (uniformity error ≤ ±1℃). The furnace cover integrates a sampling pipe and an exhaust pipe; the upper part of the furnace pot sidewall is provided with a dedicated ammonia input pipe. The furnace pot and furnace cover are fixed with water-cooled vacuum rubber seals + compression bolts, providing excellent sealing performance and effectively preventing ammonia leakage. Waste gas in the furnace is centrally treated through the exhaust pipe and discharged up to the standard, achieving environmental protection and no pollution. ※ Equipment Features Equipped with a built-in intelligent hot air circulation device and matched with a multi-zone temperature control system, the uniformity error of temperature and atmosphere in the furnace is ≤ ±1℃, ensuring the consistency of workpiece heat treatment. Adopting the full-process atmosphere protection technology, workpieces have no deformation, no oxidation, and no decarburization, with high surface finish. This can reduce subsequent processing procedures and save raw materials and production costs. The furnace pot cover adopts an electric hydraulic lifting system, which lifts and lowers stably without jitter, with precise positioning and easy operation. It is also equipped with an anti-fall safety device. Core components such as the furnace pot, charging basket, and fan are made of high-quality heat-resistant alloy steel, which is resistant to high temperature and corrosion. Their service life is extended by more than 30% compared with ordinary materials. Configured with a rapid cooling device, the cooling rate can be adjusted on demand (the maximum cooling rate reaches 15℃/min), which greatly shortens the production cycle and improves production efficiency. Equipped with a comprehensive interlock protection device (including over-temperature protection, abnormal ammonia pressure protection, furnace cover non-sealing protection, etc.), it effectively avoids faults and safety accidents caused by misoperation. No pollution and no exhaust gas exceeding the standard, with significant environmental benefits, complying with strict domestic and international environmental standards. Added an intelligent temperature control system with a touch-type operation panel, supporting temperature curve storage and historical data tracing, realizing automatic precise control and reducing manual intervention. The furnace body adopts a modular structure design, enabling convenient disassembly and assembly, low maintenance costs, strong versatility of key components, and easy procurement of spare parts. Outstanding energy-saving advantages: the triple thermal insulation structure + high-efficiency heating element reduces energy consumption by more than 35% compared with traditional equipment, achieving higher cost performance in long-term use. Wide adaptability: supports customized furnace pot sizes and process parameters, meeting the nitriding needs of workpieces of different specifications and flexibly responding to diversified production scenarios. ※ Design and Manufacturing Certifications Strictly designed and manufactured in accordance with industrial furnace standards, all performance indicators meet or exceed standard requirements. All components undergo strict performance testing (including sealing performance, temperature control accuracy, safety protection, etc.), supporting on-site pre-acceptance by customers and third-party testing. The equipment meets the export requirements of major global markets and can provide complete export certification documents and technical support.

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Room 13A07, 14th Floor, Tieshi Holding Tower, No. 471 Xinhua Road, Jianghan District, Wuhan City, Hubei Province, China.

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