Last updated : 04/01/2020
Nagato Co., Ltd.
- President
- Hiroyuki UCHIDA (Mr.)
- Year established
- 1960
- Capital
- 330,000,000 yen
- Employees
- 185
- Postal (zip) code
- 732-0802
- Company address
- 3-6-24 Ozu, Minami-ku, Hiroshima-shi
- Phone
- 082-282-4361
- Fax
- 082-282-4262
- E-Mail
- gyoumu@nagato-ht.co.jp
- URL
- http://www.nagato-ht.co.jp/
Company PR
Our company specializes in metal(mainly steel parts) heat treatment in all fields from “bulk thermal refine” to “surface treatment”. Our main customers include Mazda which is headquartered in Hiroshima, primary automobile parts manufacturers, and large-size construction machine manufacturers, and we appreciate their continued support. Since the foundation, we have been advancing along with the development of the automobile industry. We have received ISO9001 certification for all of our plants. While placing safety and environment above anything else and maintaining a good balance between technology, sales, and management, we will continue our effort to provide QCD (quality, cost, delivery) that satisfies customers and try to achieve a higher degree of strength and precision in our heat treatment components.
The Wuxi plant began operations in August 2012.
The Thailand plant began operations in May 2013.
Major Products
- Austempering of spheroidal graphite cast iron and steel
- high-frequency induction hardening treatment, submerged induction hardening, non-oxidizing induction hardening
- Atmospheric heat treatment (Carburizing, gas soft-nitriding)
- Material hardening, tempering, normalizing, annealing
- machining, polishing
Major Customers
- Mazda Motor Corp.
- Mitsubishi Heavy Industries, Ltd.
- The Japan Steel Works, Ltd.
- OTICS Corporation
- KOBELCO CONSTRUCTION MACHINERY CO., Ltd
Major Facilities/Equipment
- Austemper furnace 4
L 1,220 × W 760 × H 710, 700 kg/gross
- High-frequency oscillator equipment 36, hardening equipment 52
Frequency: 3 - 400 kHz, Output: 15 - 450 kW
- Carburizing furnace 23
W 760 X L 1,220 X H 850, 780 kg/gross
- Hard shot peening equipment 1
- Furnace for material heat treatment 5
Technology Employed
- Fabricated metal products manufacturing industry
- With its high strength and ductility, ADI (austempered ductile iron) serves as a superb alternative to steel.
- Fabricated metal products manufacturing industry
- Austempering of steel parts causes fatigue and spring characteristics. Mass production of austempered steel parts has therefore been implemented.
- Fabricated metal products manufacturing industry
- Submerged high-frequency measure allowing the quenching of small bore inside, thin wall, and corners of small components without any deformation
- Fabricated metal products manufacturing industry
- Vacuum carburizing is the optimum method for deep carburizing of 1.2 mm or more. Cost reduction can be achieved through highly efficient production.
- Fabricated metal products manufacturing industry
- By eliminating oxygen via heating/cooling in a vacuum, heat treatment distortion & oxide layers can be reduced dramatically.
- Fabricated metal products manufacturing industry
- This gas nitrocarburizing gives the metal to be resistant to abrasion and fatigue by forming compound layers on the surface.
- Fabricated metal products manufacturing industry
- Hard shot peening makes the fatigue strength increase by colliding the higher-speed steel ball to the carburized surface.
- Fabricated metal products manufacturing industry
- This boron treatment, causing the metal to be resistant to heat and wear, makes both simultaneous and partial treatments with ADI available.
- Plastic products manufacturing industry
- Low-pressure injection molding technology to simultaneously mold and glue resin and porous urethane foam.
- Fabricated metal products manufacturing industry
- Non-oxidizing induction hardening which can eliminate the afterpolishing process for gear and endless screw
Primary Area of Technical Expertise
Provides value-added parts by employing all kinds of heat treatments and surface property improvements, sometimes combining these with other special treatments in order to achieve required properties for metal/machine parts. With 7 plants, including those in Aichi and Yamaguchi, Nagato can deliver high-level technology to local businesses with short delivery times.
Future Business Challenges
- Development of wear-resistant aluminum alloy parts. Surface hardening technology for aluminum ,alloys.
- Development of high-precision, high-strength noiseless gear. A combination of carburizing, induction hardening and ion-implantation.
- Development of method for non-oxidizing induction hardening method with cost advantage and high productivity
- Light-weight, high-strength plastic products for automobile battery trays, etc.
Future Technical Challenges
- Fabricated metal products manufacturing industry
- Special surface improvement technology including the use of ions, beams, etc. on specific machine parts/metal parts.
- Fabricated metal products manufacturing industry
- Development of method for non-oxidizing induction hardening method with cost advantage and high productivity
- Fabricated metal products manufacturing industry
- A consistent production system for high-strength, high-precision gears made of ADI (austempered ductile iron).