朝日熱処理工業 List of Products and Services

Non-ferrous metal Ta (tantalum) is used in electronic devices such as mobile phones, PCs, and DVD players as an electrolytic capacitor, and in the field of microelectronics, tantalum nitride (TaN) is used as a thin film insulator. This document discusses the nitriding treatment of non-ferrous metal Ta (tantalum), which is considered difficult to nitridize, and presents changes in characteristics after nitriding treatment, as well as considerations based on X-ray diffraction results. We invite you to read it. [Contents] ■ Properties of Ta (Tantalum) ■ Characteristics after nitriding treatment of Ta (Tantalum) ■ Examples of X-ray diffraction results for Ta and nitrided Ta ■ Results and discussion *For more details, please refer to the PDF document or feel free to contact us.

• Other surface treatment equipment
• Surface treatment contract service

Asahi Heat Treatment Industry is currently offering a "Glossary of Terms Related to Heat Treatment," which summarizes basic terminology related to heat treatment. It includes over 50 terms covering various treatment methods and types of gases. Please use it for explanations aimed at beginners in heat treatment or for knowledge verification. <Examples of Terms Included> ■ Eutectoid ■ Ion Nitriding ■ Gas Nitriding ■ Vacuum Heat Treatment ■ Soft Nitriding ■ Bainite, etc. *This document can be viewed via "PDF Download." Please feel free to contact us with any inquiries.

• Technical and Reference Books

Soft nitriding treatment can easily form a nitrided layer of approximately several hundred microns to 1 millimeter, combining the surface compound layer and the internal diffusion layer, within a processing time of a few hours. Therefore, when processing small or thin items of the above sizes, not only the surface but the entire product becomes nitrided, which can lead to brittleness. Our precision low-temperature nitriding treatment (PSN treatment) allows for easy control of nitrogen diffusion by performing the treatment at low temperatures. This enables soft nitriding treatment that retains the toughness of small and thin items. If you wish to achieve soft nitriding while maintaining toughness even for small or thin items, please consider our precision low-temperature nitriding treatment (PSN treatment). 【Other Features】 - Low-temperature treatment (400°C to 530°C) minimizes dimensional changes and deformation. - Subsequent processes such as shot peening and PVD treatment are possible, allowing for synergistic effects through composite treatments. - Improvement of mechanical properties, mainly enhancing wear resistance, fatigue strength, and heat resistance. - Improved release properties in resin molds. *For more details, please refer to the PDF document or feel free to contact us.

• Other surface treatment equipment
• Surface treatment contract service

When performing soft nitriding treatment on stainless steel, the nitriding is inhibited by the passive chromium oxide film on the surface. Therefore, it is usually necessary to create a vacuum to remove the passive film or to remove the passive film using halides before proceeding with nitriding. However, with our precision low-temperature nitriding treatment (PSN treatment), we create an atmosphere that reduces the passive film during thermal decomposition and use a powder material that generates gas for soft nitriding, making it possible to achieve soft nitriding of stainless steel. If you are considering soft nitriding treatment for stainless steel, please feel free to contact us. 【Other Features】 ■ Low-temperature treatment (400℃ to 530℃) minimizes dimensional changes and deformation. ■ Subsequent processes such as shot peening and PVD treatment are possible, allowing for synergistic effects through composite treatments. ■ Improvement of mechanical properties, mainly enhancing wear resistance, fatigue strength, and heat resistance. ■ Improved release properties in resin molds. *For more details, please refer to the PDF materials or feel free to contact us.

• Other metal materials
• Other surface treatment equipment
• Surface treatment contract service

This document introduces "PSN Processing Technology DATA." It includes easy-to-understand graphs such as "Examples of PSN Processing Hardness Measurement Results" and "An Example of GDS Analysis Results." Asahi Heat Treatment Industry is a professional group specializing in heat treatment and surface treatment. Please feel free to contact us when needed. 【Contents】 ■ Examples of Microstructure Photos ■ Examples of PSN Processing Hardness Measurement Results ■ Examples of Cross-Section Hardness Distribution by Processing Specifications ■ An Example of GDS Analysis Results *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract
• Surface treatment contract service

This document introduces "Gas Soft Nitriding Treatment (SN Process)." It includes easy-to-understand examples such as "Photographic examples of nitrided layers by type of steel material" and "Structural details generated by SN treatment." Asahi Heat Treatment Industry is a group of professionals in heat treatment and surface treatment. Please feel free to contact us when needed. [Contents] ■ Photographic examples of nitrided layers by type of steel material ■ Detailed explanation of structures generated by SN treatment *For more details, please refer to the PDF document or feel free to contact us.

• Processing Contract
• Surface treatment contract service

This is an introduction to the DC-IMPACT (low-temperature plasma carburizing) treatment conducted by our company. When low-temperature carburizing is performed on SUS steel at temperatures below 500°C, it is possible to control the decrease in corrosion resistance, and our technology has been adopted in the aerospace industry. Additionally, we have developed a synergy hybrid surface modification technology as a composite treatment, which is recognized as one of the "New Selections in Manufacturing." 【Features】 ■ Developed as a surface hardening technology for precipitation hardening stainless steel ■ Established as a hardening technology through the generation of carbides by carbon diffusion and the formation of cementite ■ Adopted in projects aimed at extending the lifespan of mechanical components that drive solar panels in outer space ■ An effective surface hardening method that utilizes both nitrogen and carbon diffusion in low-temperature treatments *For more details, please refer to the PDF document or feel free to contact us.

• Plasma surface treatment equipment
• Surface treatment contract service
• Other surface treatment equipment

This is an introduction to the PVD and DLC coating conducted by our company. PVD treatment can be broadly classified into vacuum deposition, sputtering, and ion plating. Among these, ion plating, proposed in 1964 as a method for generating ceramic thin films, has undergone many improvements by numerous researchers and has been put into practical use. Ceramic thin films possess wear resistance, heat resistance, and corrosion resistance that are not found in metal materials, making it easier to obtain new functions by coating them onto metal materials. [Features] - Ion plating has been improved and put into practical use by many researchers. - Ceramic thin films have wear resistance, heat resistance, and corrosion resistance that are not found in metal materials. - It is easy to obtain new functions by coating them onto metal materials. - Widely applied in molds, automotive components, food and medical devices, etc. *For more details, please refer to the PDF document or feel free to contact us.

• Surface treatment contract service
• Other surface treatment equipment

At Asahi Heat Treatment Industry Co., Ltd., we conduct environmentally conscious nitriding treatment using plasma energy in a vacuum. When a direct current voltage is applied between the furnace wall and the workpiece in the vacuum furnace, glow discharge occurs. Hydrogen and gas are used as reaction gases to initiate the glow discharge. When nitrogen gas is introduced as the nitriding reaction gas into the excited plasma, nitrogen atoms are similarly excited and converted into N+ ions. These N+ ions are charged on the surface of the workpiece, allowing activated nitrogen elements to diffuse and harden the surface. Typically, the treatment is performed under a vacuum pressure of 1 to 10 torr at temperatures ranging from 400°C to 570°C. 【Features】 ■ The heat source used for treatment is plasma, which is energy-efficient. ■ Gas concentration can be easily adjusted, allowing for the tuning of nitriding characteristics. ■ By using carburizing gas, carburizing can be performed alongside nitriding. ■ Nitriding treatment can be conducted at low temperatures below 500°C, resulting in minimal dimensional changes and distortion. ■ Masking (nitriding prevention) can be easily achieved with jigs, allowing for partial nitriding. ■ The process is pollution-free and uses very few gases that contribute to global warming. *For more details, please refer to the PDF document or feel free to contact us.

• Plasma surface treatment equipment
• Surface treatment contract service
• Other surface treatment equipment

This is an introduction to carburizing quenching conducted by Asahi Heat Treatment Co., Ltd. When carbon steel and low alloy steel are quenched, the hardness obtained is primarily determined by the carbon content, with little influence from the added alloying elements. The higher the carbon content, the greater the quenching hardness; however, if it exceeds 0.85%, the amount of residual austenite during quenching may increase, making it difficult to achieve hardness. Carburizing quenching is applied to low carbon steel materials. For example, even if low carbon steel is quenched, the hardness obtained is around HRC20, but by diffusing carbon from the surface and increasing the surface carbon concentration, hardness of over HRC60 can be achieved. In addition, we also introduce carburizing nitriding quenching and bright quenching. [Features] - Quenching hardness is determined mainly by the carbon content. - The higher the carbon content, the greater the quenching hardness. - Carburizing quenching is applied to low carbon steel materials. - Carbon is diffused using low carbon steel materials. - A method to create materials that are hard on the surface, softer internally, and have toughness. *For more details, please refer to the PDF document or feel free to contact us.

• Other surface treatment equipment
• Surface treatment contract service

The precision low-temperature nitriding treatment (PSN treatment) is a precision low-temperature nitriding process developed by our company, targeting stainless steel precision parts and precision molds. It is a groundbreaking treatment method that uses specially formulated plastic raw materials as a nitriding source. This method allows for effective utilization of raw materials and has minimal environmental impact. Currently, we are researching and developing a method to harden austenitic stainless steel without compromising its corrosion resistance, which is a global theme. 【Features】 ■ Easy nitriding treatment of stainless steel ■ Low-temperature treatment (400°C to 530°C) minimizes dimensional changes and deformation ■ Composite treatments can be easily performed, allowing for subsequent processes such as shot peening and PVD treatment, enabling improvements through synergistic effects ■ Improvement of mechanical properties - Enhanced wear resistance, fatigue strength, and heat resistance ■ Improved release properties in resin molds *For more details, please refer to the PDF document or feel free to contact us.

• Other surface treatment equipment
• Surface treatment contract service

This is an introduction to our WPC treatment (precision shot peening). WPC treatment is a revolutionary process that sprays fine hard balls of approximately 50 to 100 μm at a speed of over 100 m/sec onto the surface of metal parts that have undergone heat treatment and diffusion surface treatment, thereby modifying the surface. Unlike conventional shot peening, the media used is finer, allowing for processing of precision parts without dimensional changes. In recent years, it has rapidly gained popularity, leading to improvements in mechanical properties that could not be achieved with standard heat treatment, and it is widely applied to automotive parts. 【Features】 ■ Improvement of fatigue strength in carburized and hardened products (exemplified by gears) ■ Enhancement of repeated fatigue strength in springs ■ Increased wear resistance and release properties of forged molds and resin molds ■ Extended lifespan of cutting tools ■ Transformation of residual austenite into martensite (metal microstructure modification) *For more details, please refer to the PDF document or feel free to contact us.

• Surface treatment contract service
• Other surface treatment equipment

This is an introduction to the gas soft nitriding treatment (SN process) conducted by our company. When gas soft nitriding is performed, a compound layer (ε layer) of about 5μm to 20μm is formed on the metal surface. This compound layer consists of a layer made of nitrides and carbides, and the gas soft nitriding treatment is conducted in an atmosphere that contains not only nitrogen atoms but also carbon atoms. Furthermore, inside this compound layer, a layer of nitrides called the diffusion layer is formed, and these compound and diffusion layers enhance the wear resistance, fatigue strength, and sliding performance of steel material components. For this reason, it can be said that this is a widely used surface heat treatment for automotive parts, electronic components, general industrial equipment, molds, and more. 【Features】 ■ Shapes that are unsuitable for salt bath nitriding or plasma nitriding, such as deep holes and slits, can be easily treated. ■ The surface has a clean, milky white finish without the adhesion of impurities or oxide films. ■ Easily applicable from small lots to mass production, for both small and large parts. ■ Improvement of mechanical properties: enhanced wear resistance (effect of high hardness and low friction coefficient of the compound layer). *For more details, please refer to the PDF document or feel free to contact us.

• Other Auto Parts
• Other surface treatment equipment
• Surface treatment contract service

We would like to introduce the strengths of Asahi Heat Treatment Industry Co., Ltd., which has received high praise from customers due to its high-precision heat treatment processing technology and thorough delivery management. These are all essential "qualities" that are indispensable to Japanese manufacturing, built up over many years. If you are facing issues with heat treatment or surface treatment such as vacuum heat treatment, nitriding, PVD, or DLC treatment, please feel free to consult us. 【Features】 ■ Heat treatment technology from Asahi Heat Treatment Industry that is active even in space ■ Quality first, which also applies to delivery times ■ A solution company with strong proposal capabilities *For more details, please refer to the PDF materials or feel free to contact us.

• Surface treatment contract service
• Other surface treatment equipment
• Plasma surface treatment equipment

Our company has developed the V-TECH vacuum furnace, which thoroughly pursues exterior quality. The heating and cooling chambers are groundbreaking vacuum furnaces that block factors affecting exterior quality, such as humidity, by not coming into contact with outside air. Currently, it is used for the heat treatment of many precision parts and molds, and through joint development with equipment manufacturers, we predict dimensional changes and deformation due to heat treatment, and have developed special jigs to reduce finishing work after heat treatment. We collectively refer to these technologies and skills as "V-TECH Heat Treatment." 【Features】 - Reduction of surface oxidation - Both heating and cooling speeds can be adjusted as desired, resulting in extremely good quenching distortion - Very clean heat treatment that is not affected by decarburization or carburization *For more details, please contact us or download the PDF.

• Surface treatment contract service

Our company is the only contract processing manufacturer in Japan that has a licensing agreement with NITREX. The state-of-the-art nitriding treatment can control the Kn (nitriding potential) to change the nitriding composition. In particular, by using the Le Chatelier diagram (equilibrium phase diagram), we can control the diffusing nitrogen concentration to easily produce: - Nitrided structure with only a diffusion layer without a compound layer - Adjustment of nitrogen concentration in the diffusion layer - Generation of a dense compound layer (with minimal porosity) For more details, please contact us or download the PDF.

• Surface treatment contract service

"Synergy Hybrid Surface Modification Technology" achieves the longevity of stainless steel components through low-temperature carburizing treatment. Stainless steel is prone to adhesive wear, which can lead to failures when used in applications such as gears. By performing low-temperature carburizing on stainless steel to harden the surface, adding a forging effect through special shot peening, and conducting special precision micro-shot to create pits for lubricant retention, destruction due to adhesive wear and other issues can be prevented. 【Features】 ○ Surface hardening ○ Improved surface pressure strength ○ Enhanced wear resistance ○ Reduced friction ○ Uniform retention of lubricant films is possible For more details, please contact us or download the catalog.

• Processing Contract
• Surface treatment contract service