Engine Components and Materials in High-grade Specialty Steels
We furnish quality engine components suitable for applications that boast such characteristics as high wear resistance, high heat resistance, strong corrosion-proof, high strength and low thermal expansion.
- Piston Ring Materials
Stainless piston rings are mainly adopted for the engines of first-grade automobiles, of which compact size and higher output are pursued. Our piston ring materials are enhanced in wear resistance and sliding capacity via nano-level control of the metal structure. Our materials can be supplied not only as raw materials but also as net-shape coil to which plastic forming is applied.
- Engine Valve Materials
We supply extremely heat-resistant and oxidation-resistant engine valve materials that excel in cost performance. They serve to reduce weight and improve the durability for engine valves.
- Other Components and Materials
Materials for fuel-injection system components, spark plug and Variable Timing Control (VTC) materials.
Electronic Components and Materials for Engine Control
- LTCC Substrates used in Electrical Equipment
Low Temperature Co-fired Ceramics (LTCC) substrates are high-strength, multi-layer substrates developed based on the past performance in the high-frequency field for mobile phones. Compared with conventional printed circuit substrates, they excel in heat resistance, thereby enabling higher density via multi-layer wiring. One major feature is low power loss due to the use of Ag (silver) wiring material with low electric resistance. The led-free structure and the use of non-cyanic material for plating Au (gold) are also friendly to the environment.
Suitable applications include the use as substrates for devices for electronic control such as engine control.
- Inverter Transformer for IGBTs
These compact and lightweight inverter transformers were exclusively developed for use in IGBTs*. An IGBT is a power element that enables high electric power conversion of several dozen kW and is used for IPMs**., which are often used for engine controls and the drive motor control in hybrid cars. These Inverter transformers for IGBTs support high electric power conversion, thereby contributing to smaller IPMs with high efficiency.
* IGBT (Insulated Gate Bipolar Transistor):
A semiconductor switching element that boosts battery voltage and convert the pressurized direct current into motor-driving alternate current.
** IPM (Intelligent Power Module):
A packaged modular in which a signal-amplifying circuit is assembled on IGBTs that function at high speeds.
Exhaust Line Components and Materials
- "HERCUNITE® Series" Heat-Resistant Cast Steel/Iron Components
HERCUNITE® is a heat-resistant cast steel/iron series suitable for use in exhaust lines developed by Hitachi Metals. The heat-resistant cast steel HERCUNITE® -S series with the cast iron EX, MX, N and O series meets different needs in diversified temperature zones.
- Diesel Particulate Filter
This is a ceramic filter for removing soot discharged from diesel vehicles. This large-scale, single-piece product has achieved a high collection ratio for micro soot particles on the order of 10 nm and the reduction of pressure loss through sophisticated control of shape, size and distribution of pores.
This filter will likely be used on future medium and large-duty commercial diesel vehicles as a means of post-processing the exhaust gas.
- Precision Castings (produced with the Lost Wax Process)
The lost wax process is a precision casting method used especially for the integral formation of complicated 3-D shapes such as turbines and hollow molding products. This method contributes to making components more lightweight, shortening processes, reducing materials cost and increasing the degree of design flexibility. Based on our metallurgical expertise in specialty steels, our products are applicable to a wide variety of materials such as ion, aluminum and titanium.
The castings are mainly used for exhaust lines where high resistance to heat and oxidization are required, and therefore are suitable for the manufacture of turbine wheels for turbochargers, vanes, EGR (exhaust gas recirculation) valves, gas turbine blades, etc.
- Metal Powder Injection Sintered Moldings (produced with the Metal Injection Molding Process)
MIM (Metal Injection Molding) is an innovative technology that combines injection-molding technology with the sintering technology for metal powders. The mixture of metal powders and the binder are injection-molded, then sintered after a defatting process. The resulting compact and slim products are near net shaped, and have strength and durability as a metal and also feature shaping flexibility thanks to the injection molding. In addition, processing errors can be avoided and the bores and small slits can be obtained.
Accordingly, the sintered moldings are suitable for small metal parts including engine components and other mechanical elements with compact and precise shapes.