伊藤熱処理 List of Products and Services

We would like to introduce the "Gas Carburizing Furnace and Gas Nitriding Furnace" at our Sendai factory. With the introduction of IoT, it is possible to monitor and remotely operate the system via computer 24 hours a day. In the event of an anomaly, immediate response is possible, and operations from loading to unloading are automated. Additionally, while the Yamagata factory has a total weight capacity of 600 kg, the Sendai factory can handle up to 900 kg, contributing to CO2 reduction due to its frameless design. 【Features】 ■ Carburizing Furnace: Capable of quenching, tempering, carburizing treatment, and carburizing nitriding treatment. ■ Nitriding Furnace: Able to adjust the compound layer according to customer requirements. *For more details, please download the PDF or feel free to contact us.

• Industrial Furnace

Our Sendai factory restarted on June 1, 2023, in the new facility. We are equipped with facilities such as the "gas carburizing furnace," "gas nitriding furnace," "dual-temperature tempering furnace," and "hydrocarbon-based vacuum cleaner." Please feel free to contact us when you need our services. 【Main Equipment (Excerpt)】 ■ Gas Carburizing Furnace ■ Gas Nitriding Furnace ■ Dual-Temperature Tempering Furnace ■ Hydrocarbon-Based Vacuum Cleaner ■ Aluminum Solution Treatment Furnace *For more details, please refer to the PDF document or feel free to contact us.

• Heating device

"Surface treatment" is a type of mechanical working method conducted to enhance the properties of material surfaces, such as plating and painting. It is primarily aimed at improving several properties, including hardness, wear resistance, lubricity, corrosion resistance, oxidation resistance, heat resistance, thermal insulation, electrical insulation, adhesion, as well as decorative and aesthetic qualities. It is a field of materials technology and exists alongside material processing technology fields such as machining, heat treatment, welding, and casting. [What is surface treatment] - A type of mechanical working method conducted to enhance the properties of material surfaces - Primarily aimed at improving several properties, including hardness, wear resistance, lubricity, corrosion resistance, and oxidation resistance *For more details, please refer to the PDF materials or feel free to contact us.

• Heating device
• Other surface treatment equipment

"Shot peening" is a treatment primarily applied to the surface of steel, aimed at achieving work hardening through plastic deformation, uniform surface stress, and the introduction of residual compressive stress. Specifically, it involves projecting a media (small steel balls mainly referred to as steel shot or steel beads) onto the workpiece by means of air pressure or mechanical force. The speed of the projected steel balls ranges from 40 to several hundred m/s, and their size is approximately 0.05 mm to several mm. A deep hardened layer is obtained by projecting larger steel balls at high speeds, while a shallow hard layer is achieved by projecting smaller steel balls at fast speeds. [What is shot peening] - A form of surface treatment utilizing shot blasting - Achieved by projecting media onto the workpiece using air pressure or mechanical force - The speed of the projected steel balls is approximately 40 to several hundred m/s *For more details, please refer to the PDF document or feel free to contact us.

• Heating device

"Nitridization (nitriding)" refers, in a broad sense, to the overall process of permeating nitrogen into metals. In a narrow sense, it refers to surface hardening treatments for steel materials and titanium alloys. [Metal Heat Treatment (Excerpt)] ■ Quenching ■ Tempering ■ Annealing ■ Normalizing ■ High-Frequency Quenching ■ Carburizing ■ Shot Peening *For more details, please refer to the PDF document or feel free to contact us.

• Heating device

"Carburizing" refers to a treatment in the processing of metals (especially low carbon steel) that involves adding carbon with the aim of hardening the surface layer. It is possible to harden only the surface of the metal while maintaining a flexible structure internally. Post-treatment after carburizing creates stress between the surface layer and the interior, which provides resistance to cracking. This process is mainly performed to improve wear resistance in heavy machinery and mechanical components. [What is Carburizing] - A treatment that adds carbon for the purpose of hardening the surface layer in the processing of metals (especially low carbon steel). - Mainly conducted to enhance wear resistance. - It is possible to achieve both wear resistance and toughness. *For more details, please refer to the PDF document or feel free to contact us.

• Heating device

"High-frequency quenching" is a heat treatment method that induces electromagnetic induction in metals using high-frequency electromagnetic waves, overheating the surface to perform quenching. This process hardens only the surface of the metal, increasing its hardness while maintaining the original state of toughness in the interior, allowing for the creation of materials rich in flexibility. Depending on the type of steel, the surface hardness generally increases by about 1 to 2 Rockwell hardness (HRC) compared to conventional quenching. 【What is high-frequency quenching】 - It is possible to create materials rich in flexibility by hardening only the surface of the metal to increase hardness while maintaining the original state of toughness in the interior. - The surface hardness generally increases by about 1 to 2 Rockwell hardness compared to conventional quenching. - This method is mainly suitable for steel with a carbon content of 0.3% or more. *For more details, please refer to the PDF document or feel free to contact us.

• Heating device

"Annealing" is a heat treatment that removes internal stresses caused by processing, restores the structure to a standard state, and refines it. By performing annealing, strength and ductility are increased, making it useful as a preliminary treatment for quenching. Additionally, steel is held in the austenite structure for a sufficient period and then cooled adequately in air. 【What is Annealing】 ■ Removes internal stresses caused by processing ■ Restores the structure to a standard state or refines it ■ Steel is held in the austenite structure for a sufficient period and then adequately cooled in air *For more details, please refer to the PDF document or feel free to contact us.

• Heating device

"Annealing" refers to a heat treatment that removes internal strain caused by work hardening, softens the structure, and improves ductility. After sufficiently holding steel in the austenite structure, it is slowly cooled in a furnace. [Metal Heat Treatment (Excerpt)] ■ Quenching ■ Tempering ■ Normalizing ■ High-Frequency Quenching ■ Carburizing ■ Nitriding ■ Shot Peening *For more details, please refer to the PDF document or feel free to contact us.

• Heating device

"Tempering" is a heat treatment performed to impart toughness to steel that has been hardened by quenching. It involves reheating the steel from a martensitic state, holding it at a certain temperature for a specific period, and then cooling it slowly. After reheating, the changes in the microstructure vary depending on the holding temperature. Tempering at approximately 600 degrees Celsius yields a sorbite structure, while tempering at around 400 degrees Celsius results in a troostite structure. Additionally, the series of processes where the steel is tempered at a temperature that produces a sorbite structure after quenching is specifically referred to as "quenching and tempering." [What is Tempering] - A heat treatment performed to impart toughness to steel that has been hardened by quenching. - The process of reheating the steel from a martensitic state, holding it for a certain period, and then cooling it slowly. - Tempering at approximately 600 degrees Celsius yields a sorbite structure, while tempering at around 400 degrees Celsius results in a troostite structure. *For more details, please refer to the PDF document or feel free to contact us.*

• Heating device

"Quenching" is a heat treatment process that involves heating steel to an austenitic structure and then rapidly cooling it in water or oil, transforming it into a martensitic structure. Depending on the cooling medium, it is referred to as water quenching or oil quenching, and it is also a method used in the forging of Japanese swords. This process is performed to increase the hardness of the steel, but it reduces toughness, so it is common to perform tempering after quenching to achieve ductility. 【What is Quenching】 ■ A process that changes the state of steel from an austenitic structure to a martensitic structure by heating it and then rapidly cooling it in water or oil. ■ A method used in the forging of Japanese swords. ■ The quenching effect cannot be expected unless the carbon content is 0.3% or higher. *For more details, please refer to the PDF document or feel free to contact us.

• Heating device

"Heat treatment" refers to a method of enhancing the quality of materials, similar to shape processing, which involves changing the properties of the material through heating and cooling. Additionally, it involves heating and cooling metals and other materials to alter their hardness and properties. [Metal Heat Treatment (Excerpt)] - Quenching - Tempering - Annealing - Normalizing - High-frequency quenching - Carburizing - Nitriding *For more details, please refer to the PDF document or feel free to contact us.

• Heating device

Our company specializes in carburizing and quenching for a wide variety of products, ranging from small quantities to automotive and construction machinery parts. Among these, we are engaged in mass production of shafts for a certain automotive manufacturer and a certain construction machinery manufacturer, and we have numerous achievements in this area. 【Features】 - We have five furnaces with sizes of 600mm x 600mm x 1200mm. - We also handle shaft shapes that may be prone to deformation, with proven results for mass-produced shafts measuring 140mm in length. - We can accommodate a wide range of carburizing depths from 0.2mm to over 1.0mm. If you have any concerns regarding carburizing and quenching, please feel free to consult with us.

• Heating device

At our company, when setting the products entrusted to us by our customers into heat treatment jigs, we do so by arranging and picking them up by hand. This careful handling prevents scratches and dents. All of our full-time employees hold national qualifications as metal heat treatment specialists, and our team of professionals is dedicated to working on your products with great care. Please feel free to contact us for inquiries.

• Heating device

Ito Heat Treatment Co., Ltd. is equipped with a variety of facilities to tailor products to meet customer requirements, allowing us to make optimal proposals that align with your needs. If it's heat treatment, please leave it to us. 【List of Heat Treatment Equipment】 ■ Rod High-Frequency Quenching Equipment * The introduction of robots enhances productivity, reduces costs, and strengthens price competitiveness. ■ High-Frequency Induction Heating Equipment * It can harden only the necessary parts, achieving high surface hardness and excellent wear resistance. ■ Superior Batch-Type Gas Nitriding Furnace * Gas cooling allows for no subsequent processes and enables short delivery times. ■ Medium Salt Salt Bath * Direct heating minimizes deformation and reduces the risk of cracking. ■ Black Oxide * It provides rust resistance, is cost-effective, minimizes dimensional changes, and is resistant to peeling. ■ Drip-Type Gas Carburizing Furnace * It allows for the "tempering" and "annealing" of materials. ■ Vacuum Heat Treatment Furnace * It prevents oxidation and decarburization, resulting in high hardness and excellent wear resistance. ■ Gas Nitriding Furnace * It improves fatigue strength and corrosion resistance. For more details, please feel free to contact us.

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• Processing Contract

"Heat treatment" refers to a method that enhances the quality of materials, similar to shape processing, and involves changing the properties of materials through heating and cooling. It also involves altering the hardness and properties of metals and other materials through heating and cooling. This includes processes such as "quenching," "high-frequency quenching," "shot peening," and "surface treatment," which are all part of metal heat treatment. 【Metal Heat Treatment (Excerpt)】 ■ What is heat treatment ■ Quenching ■ Tempering ■ Annealing ■ Normalizing *For more details, please refer to the external link page or feel free to contact us.

• Heating device

Ito Heat Treatment Co., Ltd. is one of the few comprehensive heat treatment factories in the Tohoku region, serving approximately 500 clients from six prefectures in Tohoku to the Kanto and Chubu regions. We specialize in "carburizing and quenching," a process that hardens the surface of steel while keeping the interior soft, which is essential for automotive mission shafts and crankshafts due to its excellent wear resistance and fatigue resistance, as well as its strength against impact and vibration. We perform heat treatment processing across a wide range of fields, including automobiles, motorcycles, and construction, and our ability to cater to various sectors, from mass-produced automotive parts to small quantities of molds and tools, is one of our strengths. For any heat treatment processing needs, please trust us. 【Business Activities】 ■ Heat treatment processing of metal products (automotive parts, industrial machine parts, electrical equipment, sewing machines, knitting machines, hydraulic machinery, construction machinery, agricultural machinery, office equipment, and various other metal parts) ■ Surface treatment processing of metal products (blackening, shot blasting) *For more details, please refer to our catalog or feel free to contact us.

• Heating device