遠州熱研 List of Products and Services

"Shrink fitting" is a process that utilizes thermal expansion of the shaft and bearing to fit them together. The shaft is inserted while the bearing is in a state of thermal expansion, and due to the subsequent cooling of the bearing, the shaft and bearing become fixed together. Please feel free to contact us when you need assistance. 【Features】 ■ A process that utilizes thermal expansion to fit the shaft and bearing together ■ The shaft and bearing become fixed together due to the cooling of the bearing ■ JIS processing symbol: AFTS *For more details, please refer to the PDF document or feel free to contact us.

• Processing Technology

"Precipitation hardening" refers to a treatment process in which precipitation hardening stainless steel is heated and held at a specified temperature, then air-cooled to achieve hardening. The formation of a different phase with a distinct structure or organization within a solid is called precipitation, and the process of artificially inducing another phase to precipitate for hardening is known as precipitation hardening, also referred to as aging hardening. The precipitation hardening treatment conditions for SUS630 are specified by the following four conditions, and it can accommodate H900, H1025, H1075, and H1150. [Features] ■ Treatment process that involves heating and holding precipitation hardening stainless steel at a specified temperature, followed by air cooling to achieve hardening ■ Treatment conditions for SUS630 - Specified by four conditions - Capable of accommodating H900, H1025, H1075, and H1150 ■ JIS processing symbol: HAG *For more details, please refer to the PDF document or feel free to contact us.

• Processing Technology

"Flame hardening" is a process that involves heating the surface of steel with a high-temperature flame, followed by quenching to harden the surface layer. Using a torch, the steel is heated partially and then rapidly cooled. This process allows for a hard surface layer with high wear resistance and a tough core, resulting in significant residual compressive stress on the surface, which improves fatigue strength. It is suitable for partial hardening of small parts (approximately Φ30 or less). 【Features】 ■ A process that heats the surface of steel with a high-temperature flame, followed by quenching to harden the surface layer. ■ Capable of producing a hard surface layer with high wear resistance and a tough core. ■ Significant residual compressive stress on the surface improves fatigue strength. ■ Suitable for partial hardening of small parts (approximately Φ30 or less). ■ JIS processing symbol: HQF *For more details, please refer to the PDF document or feel free to contact us.

• Processing Technology

"Gas nitriding" is a treatment that hardens only the surface layer of steel by allowing nitrogen and carbon to penetrate and diffuse from the surface at a specified temperature. Ammonia (NH3), nitrogen (N2), and carbon dioxide (CO2) are supplied in a furnace at temperatures below 500°C to 600°C, where the decomposed active nitrogen and carbon penetrate and diffuse from the surface. A compound layer of carbonitrides forms on the surface, and a diffusion layer is generated just below it, improving wear resistance and fatigue resistance. 【Features】 - Low treatment temperature minimizes distortion - Small dimensional changes are also an advantage of gas nitriding - Applicable to most steel materials - Equivalent treatment to salt bath nitriding (tufftriding) - JIS processing symbol: HNC-G *For more details, please refer to the PDF document or feel free to contact us.

• Processing Technology

"Annealing" refers to the process of heating steel to a specified temperature and then holding it there before slowly cooling it down. When machining tools and machine parts, it is necessary to improve machinability by removing residual stress (stress caused by machining or heat), softening the material, and homogenizing the structure. By heating and holding at over 800°C followed by slow cooling, machinability, ductility, and toughness are enhanced. [Features] - A treatment that involves heating steel to a specified temperature and then slowly cooling it. - Improved machinability, ductility, and toughness. - Selection of treatment according to the desired property improvement: - Diffusion annealing - Full annealing - Spheroidizing annealing - Isothermal transformation annealing - Stress relief annealing - JIS processing symbol: HA *For more details, please refer to the PDF document or feel free to contact us.

• Processing Technology

"Yaki Narashi" refers to a treatment in which steel is heated and held at a specified temperature or higher, followed by air cooling. Forged, cast, or rolled steel materials exhibit coarse crystallization and uneven structures, resulting in inadequate mechanical properties. By heating and holding at temperatures above 800°C (the transformation point) and then air cooling, the crystallization is refined, the structure is homogenized, toughness is improved, and residual stresses (stresses generated from processing or heat) are eliminated, thereby enhancing mechanical properties. [Features] - Treatment involving heating and holding steel at a specified temperature or higher, followed by air cooling - Refinement of crystallization and homogenization of structure - Improvement of toughness and elimination of residual stresses (stresses generated from processing or heat) - Enhancement of mechanical properties - JIS processing symbol: HNR *For more details, please refer to the PDF document or feel free to contact us.

• Processing Technology

"Tempering" refers to the process of heat treatment performed at high temperatures after quenching. By tempering at temperatures above 550°C after quenching, a sorbite structure is formed, resulting in high toughness (ductility). We can adjust to your desired hardness, so please feel free to contact us when needed. 【Features】 ■ Tempering is performed at temperatures above 550°C after quenching ■ Sorbite structure is formed ■ High toughness (ductility) is achieved ■ Adjustable to your desired hardness *For more details, please refer to the PDF document or feel free to contact us.

• Processing Technology

"Carburizing hardening" refers to a treatment that allows carbon to penetrate and diffuse from the surface of a metal, hardening only the surface. The surface becomes hard and wear-resistant, while the interior maintains lower hardness, resulting in high toughness and improved fatigue resistance. Additionally, "carburizing nitriding" is a treatment that allows both carbon and nitrogen to penetrate and diffuse into the surface of steel, hardening only the surface layer. This improves wear resistance. 【Features】 ■ Carburizing hardening - The surface becomes hard and wear-resistant - The interior maintains lower hardness for high toughness - Fatigue resistance can also be improved ■ Carburizing nitriding - A treatment that hardens only the surface layer - Wear resistance is improved *For more details, please refer to the PDF document or feel free to contact us.

• Processing Technology

"Vacuum carburizing hardening" is a carburizing hardening method conducted in a vacuum furnace. Acetylene gas supplied into the furnace undergoes thermal decomposition, and the resulting carbon penetrates and diffuses from the surface. In addition to the carburizing effect, there is no grain boundary oxidation or carburizing unevenness in the surface layer, making it possible for the inner surfaces of pores as well. Moreover, since it finishes with a bright luster, an improvement in quality can be expected compared to conventional carburizing hardening. [Features] - Carburizing hardening method conducted in a vacuum furnace - In addition to the carburizing effect, it allows for the inner surfaces of pores due to the absence of grain boundary oxidation and carburizing unevenness in the surface layer - Finishes with a bright luster - Quality improvement can be expected compared to conventional carburizing hardening - JIS processing symbol: HQV *For more details, please refer to the PDF materials or feel free to contact us.

• Processing Technology

"Radiant Hardening" is a hardening method that finishes with a surface that maintains a metallic luster. By processing in a non-oxidizing atmosphere, it prevents oxidation and decarburization, protecting the radiant quality. This also leads to a reduction in subsequent processes such as shot blasting. Please feel free to contact us when you need our services. 【Features】 ■ A hardening method that finishes with a surface that maintains a metallic luster ■ Prevents oxidation and decarburization ■ Can protect the radiant quality ■ Leads to a reduction in subsequent processes such as shot blasting ■ JIS processing symbol: HQB *For more details, please refer to the PDF document or feel free to contact us.

• Processing Technology

By performing quenching, the hardness of steel increases and its strength improves; however, the degree of hardening varies depending on the carbon content in the steel, the alloying elements present, and the size of the material, which affects the maximum hardness and depth of hardening. The structure of quenched steel is brittle and in a state of internal stress, so re-heating is performed to adjust hardness, relieve internal stress, and improve toughness. Tempering after quenching is essential and is broadly classified into low-temperature tempering (below 200°C) and high-temperature tempering (above 500°C), with high-temperature tempering referred to as "quenching and tempering treatment." By combining tempering temperature and holding time, the desired hardness can be achieved. 【Features】 ■ Quenching: A treatment in which steel is heated and held above a specified temperature, then rapidly cooled with water, oil, etc. to harden. ■ Tempering: A treatment in which the steel is re-heated to a specified temperature after quenching. ■ The combination of tempering temperature and holding time allows for the achievement of the desired hardness. ■ JIS processing symbols: HQ (quenching), HT (tempering) *For more details, please refer to the PDF document or feel free to contact us.

• Processing Technology

Our company selects reliable partner companies and accepts orders through outsourcing. We offer services such as high-frequency hardening, vacuum hardening, Parkerizing, salt bath soft nitriding (Tufftride), and large-scale annealing/shooting products. Please feel free to contact us when you need our services. 【Overview】 ■ High-Frequency Hardening - Applicable to general steel materials - Estimated delivery time = 2 to 3 business days from the date of receipt (Exceptions may apply depending on whether distortion correction is needed; please inquire for large items) ■ Vacuum Hardening - Applicable materials: SKD series / SKH series / martensitic SUS / SK / medium carbon steel - Estimated delivery time = the day after receipt to 2 business days later (exceptions may apply depending on hardness and whether distortion correction is needed) *For more details, please refer to the PDF document or feel free to contact us.

• others

"Pickling" refers to the process of removing and cleaning burn marks, rust, scale, etc., caused by heat treatment, welding, brazing, and other methods using hydrochloric acid. The processable size is W600×D1500×H(450–900). It is suitable for steel materials. Please feel free to contact us when you need our services. 【Basic Information】 ■ Processable Size: W600×D1500×H(450–900) ■ Applicable Material: Steel materials ■ Estimated Delivery Time: Same day to the next business day *For more details, please refer to the PDF document or feel free to contact us.

• Processing Technology

"Straightening" refers to the process of correcting bends that occur in steel materials due to heat treatment. Press straightening is applied to carburized and tempered products, while heated straightening is performed on hardened products. Depending on the shape, material, hardness, and other conditions, there is a risk of cracking. 【Features】 ■ A process to correct bends in steel materials caused by heat treatment - Press straightening for carburized and tempered products - Heated straightening for hardened products ■ JIS processing symbol: ZS *For more details, please refer to the PDF document or feel free to contact us.

• others

"Anti-carbon treatment" is a process performed on areas where carburizing hardening is to be avoided. By applying an anti-carbon agent to the threaded parts and machined areas after heat treatment, it prevents the infiltration of carbon during carburizing. The coated areas are hardened with the same carbon content as the base material, so they do not achieve higher hardness compared to the carburized areas. It is also effective in preventing cracking. 【Features】 ■ Treatment performed on areas where carburizing hardening is to be avoided ■ Prevents carbon infiltration during carburizing ■ Effective in preventing cracking *For more details, please refer to the PDF document or feel free to contact us.

• others

"Shot blasting" is a process for removing contaminants and dirt such as scale, rust, and paint from the surface of steel. Using the power of a motor, a rotor called a blade is rotated at high speed, and steel shot is fed into it. The centrifugal force generated by the high-speed rotating blade propels the shot onto the surface for cleaning. It is suitable for improving appearance, rust prevention, and surface preparation. 【Features】 ■ Process for removing contaminants and dirt ■ Cleans by propelling onto the surface using the centrifugal force of the high-speed rotating blade ■ Suitable for improving appearance, rust prevention, and surface preparation ■ JIS processing symbol: SBSH *For more details, please refer to the PDF document or feel free to contact us.

• Processing Technology

"Black dyeing" is a treatment that finishes the surface of steel with a black glossy appearance, using a chemical method that involves immersion in an aqueous solution primarily composed of caustic soda. The composition of the film is Fe3O4 (magnetite). Because it originates from a chemical reaction on the surface, the thickness is usually 1 to 2 micrometers (which may vary slightly depending on the treatment time), and it has little impact on the product dimensions, making it suitable for coloring and rust prevention of precision parts. We accommodate a wide variety of products and achieve high quality through years of experience and unique formulation techniques. 【Features】 ■ The metal surface turns black as is, resulting in extremely small dimensional changes. ■ Applicable to most materials such as general iron, steel, and cast iron (excluding aluminum and stainless steel). - Some materials, cast iron, and hardened items may turn slightly reddish-black. ■ Enhances the added value of products with a beautiful black glossy finish. ■ Can respond at low cost and with short delivery times (possible same-day delivery at the earliest). *For more details, please refer to the PDF document or feel free to contact us.

• Processing Technology

Our company specializes in metal heat treatment and metal surface treatment for a wide variety of products, including transportation equipment, industrial and machine tools, and automotive parts. We take pride in our ability to correct warping (bending) of long products caused by quenching through a process called "stress relief," as well as our unique formulation technology that gives metal surfaces a glossy black finish through "blackening" treatment. Our blackening tanks can accommodate a wide range of products, from large items over 2000mm to very small sizes. Please feel free to contact us with your inquiries. 【Our Strengths】 ■ Capability to handle a diverse range of products ■ Short delivery times (single items and small lot products) ■ Unique skilled techniques ■ Business continuity enhancement plan *For more details, please download the PDF or feel free to contact us.

• Processing Technology