オーネックス List of Products and Services

Aornex Co., Ltd. is a company primarily engaged in the metal heat treatment processing business. We handle heat treatment across a wide range of fields, including automotive, industrial machinery, machine tools, and construction machinery-related parts, developing technologies to meet client needs and establishing reliable delivery times under strict quality control. Additionally, the Aornex Group offers services in cargo transportation and information system development, in addition to heat treatment, to meet the diverse needs of our customers. Please feel free to contact us with any inquiries. [Business Description] ■ Metal heat treatment processing business (metal heat treatment processing, metal correction processing) *For more details, please refer to our catalog or feel free to contact us.

• Other contract manufacturing

"SOFT-NITE" is an environmentally friendly surface heat treatment that replaces the salt bath nitriding process (Tufftride method). Since it is a dry method that does not use cyanide salts such as KCN or NaCN, there are no pollution issues from wastewater, making it a very stable process. In particular, the surface condition and cleanliness are extremely good, contributing to cost-effectiveness. 【Features】 ■ High surface hardness and excellent wear resistance ■ Presence of compressive residual stress on the surface increases fatigue strength ■ High corrosion resistance due to the properties of the compounds ■ Treatment temperature is in the ferrite region, resulting in minimal deformation ■ Improved anti-seizing properties due to the presence of a porous layer on the surface *For more details, please refer to the catalog or feel free to contact us.

• Other factory equipment and parts

Acid nitriding is a nitriding method that differs from conventional nitriding methods by adding an appropriate amount of oxygen or air to ammonia gas. Our acid nitriding is based on the ON process and includes three types of processes: ONO, ONOR, each with excellent characteristics. Compared to gas soft nitriding, acid nitriding shows almost the same properties in wear resistance and fatigue strength, but it has the added features of excellent corrosion resistance, seizure resistance, compatibility, and a beautiful black appearance. 【Features】 ■ Pollution-free heat treatment ■ High surface hardness and excellent wear resistance ■ Improved fatigue strength due to surface residual compressive stress ■ Enhanced compatibility and seizure resistance due to the porous acid nitriding layer formed on the surface ■ A beautiful glossy black appearance is achieved *For more details, please refer to the catalog or feel free to contact us.

• Other factory equipment and parts

"BORON" is a treatment that diffuses boron (B) onto the surface of steel, forming a very hard boride compound layer while simultaneously creating a boron solid solution diffusion layer. The boride compound layers generated on the steel surface include FeB + Fe2B layers and Fe2B layers. The dimensional change due to the treatment is very small, approximately 20μm for a boron layer of 100μm. 【Features】 ■ High surface hardness and excellent wear resistance ■ Resistant to sulfuric acid, hydrochloric acid, phosphoric acid, and alkalis ■ Reduced oxidation wear up to 600°C in the atmosphere *For more details, please refer to the catalog or feel free to contact us.

• Other factory equipment and parts

Acid nitriding is a nitriding method that differs from conventional nitriding methods by adding an appropriate amount of oxygen or air to ammonia gas. Developed by Nissan Motor Co., Ltd.'s Central Research Institute under the name NN method as a non-polluting nitriding method that does not cause cyanide synthesis in the processing atmosphere during the 1960s, when pollution became a social issue, this technology has been introduced and put into practical use by Onex Co., Ltd., which has since made its own improvements. Onex Co., Ltd.'s acid nitriding is based on the ON process and includes three types of processes: ONO and ONOR, each possessing excellent characteristics. Compared to gas soft nitriding, acid nitriding shows almost the same properties in wear resistance and fatigue strength, but it has the added features of excellent corrosion resistance, seizure resistance, compatibility, and a beautiful black appearance. For more details, please contact us or refer to the catalog.

• Surface treatment contract service

The global landscape is changing significantly with the advancement of globalization, including the rise of the EU, China, and India, among other Asian countries. In the midst of these changes, we are not allowed to remain complacent in our current situation; we are constantly required to undergo self-transformation to adapt to change. Ohnex, as a specialized company in metal heat treatment that supports the industrial foundation, has been engaged in heat treatment across a wide range of fields, including automotive, industrial machinery, machine tools, and construction machinery-related parts, earning high trust from our customers regarding quality. Utilizing our know-how based on over half a century of heat treatment technology, we are committed to improving quality and productivity while fulfilling our social responsibilities, including addressing environmental issues, and boldly challenging new heat treatment technologies and fields. Additionally, the Ohnex Group provides services in cargo transportation and information system development, in addition to heat treatment, to meet the diverse needs of our customers. We will continue to do our utmost to respond to our customers' requests. We sincerely ask for your exceptional support and patronage. For more details, please contact us or refer to our catalog.

• Surface treatment contract service

Gas soft nitriding treatment is one of the soft nitriding methods developed to solve the quality issues associated with traditional salt bath nitriding and to reduce environmental impact while achieving equal or superior quality characteristics. Generally, at a treatment temperature of around 570°C, a mixed gas primarily composed of ammonia gas is added to form a compound layer of carbides and nitrides on the surface of the processed material, generating a diffusion layer beneath it. This nitrided layer significantly improves the mechanical properties of steel components, such as wear resistance, corrosion resistance, and fatigue resistance. Gas soft nitriding treatment is an environmentally friendly method that allows for the acquisition of effective quality characteristics in a short time, making it a processing method that considers environmental aspects and responds to the lightweight and miniaturization of components due to the spread of electric vehicles. It is a surface hardening method that will increasingly be applied in a wide range of markets. For more details, please contact us or refer to the catalog.

• Surface treatment contract service

ONEX Boron is a treatment that diffuses boron (B) into the surface of steel, forming a very hard boride compound layer while also creating a boron solid solution diffusion layer. The boride compound layer generated on the steel surface consists of FeB + Fe2B layers and Fe2B layers. The dimensional change due to the treatment is extremely small, approximately 20μm for a boronized layer of 100μm. For more details, please contact us or refer to the catalog.

• Surface treatment contract service

Shot peening refers to the process of impacting a surface with small steel particles (shot) using a rounded hammering action (peening). It originated in the 19th century when steel plates were strengthened by hammering, and it has been widely applied to vehicle leaf springs and similar components. By projecting hard steel balls onto the surface of heat-treated products (such as quenching and carburizing), the surface undergoes work hardening, resulting in high residual compressive stress. The improvement in residual compressive stress enhances durability and resistance to fatigue failure. Additionally, it helps improve surface irregularities and prevent hydrogen embrittlement. While the methodology is similar, it is important to distinguish shot peening from shot blasting or sandblasting, which are aimed at removing surface contaminants. For more details, please contact us.

• others

Gas soft nitriding treatment is one of the soft nitriding methods developed to solve the quality issues associated with traditional salt bath nitriding and to reduce environmental impact while achieving equivalent or superior quality characteristics. Generally, at a treatment temperature of around 570°C, a mixed gas primarily composed of ammonia gas is added to form a compound layer of carbides and nitrides on the surface of the processed material, creating a diffusion layer beneath it. This nitrided layer significantly improves the mechanical properties of steel components, such as wear resistance, corrosion resistance, and fatigue resistance. Gas soft nitriding treatment is an environmentally friendly method that allows for effective quality characteristics to be obtained in a short time, making it a processing method that takes environmental aspects into consideration. It is also a treatment method that responds to the lightweight and miniaturization of components due to the spread of electric vehicles, and it is expected to be increasingly applied in a wide range of markets as a surface hardening method. ● For more details, please contact us.

• others

Aluminum alloys are strengthened by heat treatment processes. Below are some representative treatments. 1. Solution Treatment and Natural Aging (T-4) This heat treatment involves rapidly cooling (water cooling) the aluminum alloy while maintaining a state where magnesium (Mg), copper (Cu), silicon (Si), and other elements are dissolved in the aluminum base (supersaturated solid solution). 2. Solution Treatment and Artificial Aging (T-6) This treatment improves hardness and mechanical strength by precipitating compounds of magnesium (Mg), copper (Cu), silicon (Si), etc., that were dissolved during the solution treatment, and is accelerated by raising the temperature to a certain level. 3. Stabilization Treatment (T-5) For some aluminum parts, to prevent changes in properties due to temperature rise during use, this process stabilizes the characteristics of the parts at a temperature slightly higher than the operating temperature. 4. Annealing Treatment (O Treatment) Annealing may be performed at around 350°C to improve workability. This is done when reprocessing parts that have already undergone T-6 treatment, particularly to reduce deformation in parts that are likely to deform. ● For more details, please contact us.

• others

Nitriding is a treatment that generates hard nitrides such as those of Ar, Cr, Mo, Ti, and V by allowing nitrogen to diffuse into the material. As a result, it does not harden due to changes in the microstructure, leading to less distortion compared to carburizing. Additionally, the treatment temperature is between 500 and 550°C, making it an environmentally friendly process. Furthermore, with the integration and high precision of components, research and development of nitriding processes controlled by atmosphere is gaining attention as a heat treatment technology that minimizes distortion. However, in conventional gas nitriding processes, an excessive compound layer is formed on the surface, which can lead to peeling and dimensional changes. To address this issue, we have established a technology that utilizes H2 sensors to control the thickness of the compound layer through nitriding potential. ● For more details, please contact us.

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Large components are designed to withstand greater forces compared to small components. Therefore, the required carburizing depth in heat treatment is also deeper. Additionally, as the components themselves become larger, the time taken for heating, cooling, and tempering, aside from processing time, increases. Our company enables a reduction in carburizing time by performing high-temperature, high-concentration carburizing. We have extensive experience in carburizing large components and possess technical know-how. We have multiple facilities capable of processing large components, and we have a top-class equipment system in Japan. In terms of processing capacity, we can handle outer diameters of up to 2200 mm and lengths of up to 6000 mm. We receive many orders not only domestically but also from overseas, and our high processing technology is widely recognized. ● For more details, please contact us.

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Quenching, in a broad sense, is performed on various types of steel, each with its own specific heat treatment cycle. However, when described as a general tempering heat treatment, it involves heating carbon steel and alloy steel for mechanical structures with a carbon content of 0.3% or more to around 850°C in the austenite phase region, followed by rapid cooling in water or oil to transform the structure into martensite. Tempering is a heat treatment conducted to impart toughness to steel hardened by quenching. It involves reheating the steel from the martensite structure to 550°C to 650°C, holding it for a certain period, and then cooling it down. This quenching and tempering heat treatment is performed to adjust the mechanical properties of the steel, and the series of processes is referred to as tempering heat treatment. ● For more details, please contact us.

• others

Bright annealing refers to a state where the product shines brightly, as the name suggests. The atmosphere of the heat treatment furnace is adjusted to process the products without causing surface oxidation. Our company uses nitrogen gas and a mixture of nitrogen and hydrogen gas to prevent oxidation on the product surface. We manage the atmosphere from the time the products are loaded into the heat treatment furnace until the heating and cooling processes are complete. We have a pit-type bright annealing setup, allowing us to perform bright annealing on a variety of products, from large items to small parts. The main processing contents are as follows: - Magnetic annealing treatment of low carbon steel - Microstructure adjustment of skin-hardened steel (for stabilizing grain size after carburizing) - Oxidation-free stress relief annealing Additionally, we have water cooling equipment, enabling us to perform heating without oxidation and cooling with water. - Water cooling treatment for copper alloys - Water cooling treatment for titanium alloys For more details, please contact us.

• others

High-frequency hardening is a process that can be described in one word as heating and cooling only the necessary parts to harden them. 【Principle】 1. Utilizing the phenomenon of electromagnetic induction Electromagnetic induction occurs when a coil A connected to a power source is placed near another coil B (both coils are in a non-contact state) and the power is turned on, generating a magnetic field. At this moment, a current is induced in coil B as well. (The same occurs when the power is cut off.) The phenomenon of current being induced in coil B is called electromagnetic induction. 2. Heating the product with the induced current By using the current (eddy current) induced by electromagnetic induction, placing the product (metal) instead of coil B allows current to flow through the product. When current flows through the product, Joule heat is generated due to resistance, and the product is efficiently heated through a direct heating method as it self-heats. 3. Heating only the necessary depth of the necessary parts By shaping coil A to match the shape of the part of the product that needs to be heated, only the necessary parts are heated. The higher the frequency of the power source, the more the induced current concentrates on the surface of the product (this is called the skin effect). The frequency is selected arbitrarily based on the product shape (size) and the desired depth of the hardened layer. ● For more details, please contact us.

• others

Vacuum heat treatment technology has developed alongside the advancement of production equipment. When metal materials such as automotive parts and molds are quenched (heated and cooled) in the atmosphere, the oxygen in the air reacts chemically with the iron in the metal materials, causing the surface to oxidize and turn into iron oxide. However, vacuum heat treatment creates a protective atmosphere that prevents oxidation, reduction, nitriding, and carburizing by utilizing various exhaust pumps to achieve a high vacuum within the equipment, thereby lowering the partial pressure of oxygen. As a result, even when metal materials are quenched (heated and cooled), they finish with a glossy appearance. This is the greatest feature of vacuum heat treatment. ● For more details, please contact us.

• others

Carburizing and nitriding treatment refers to the process of simultaneously or continuously performing carburizing and nitriding. Generally, for materials with poor hardenability, such as low-carbon low-alloy steel, carburizing is conducted while adding ammonia gas or similar substances to achieve both carburizing and nitriding, aiming to improve the hardenability of the material at lower transformation temperatures. By performing nitriding, it becomes possible to effectively introduce hardness into materials that do not harden with carburizing alone. The quality characteristics obtained from carburizing and nitriding treatment include improved wear resistance and fatigue strength, similar to carburizing, as well as enhanced softening resistance. Recently, carburizing and nitriding treatment has also been applied to alloy steel or bearing steel for the purpose of improving mechanical properties. ● For more details, please contact us.

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Carburizing heat treatment technology is a thermal process that involves the infiltration of carbon into the surface of steel, followed by quenching. By introducing carbon, it significantly improves the wear resistance, durability, and toughness of steel components. Historically, carburizing techniques included solid and liquid carburizing, but currently, gas carburizing is the mainstream method. Additionally, advanced techniques such as vacuum carburizing and plasma carburizing have been developed and continue to evolve. The significant improvements in wear resistance, durability, and toughness of steel components have led to their use in various applications, including automotive parts, machine tool components, and construction machinery parts, such as gears, shafts, and moving parts, thereby supporting industrial development and enhancing material heat treatment technology. ● For more details, please contact us.

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