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Project Story

Synthetic Diamond Development Project

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Product list (INDUSTRIAL MATERIALS)

Cemented carbide insert
End mill & drill
Powder metallurgical parts
Bonding tool
Steel wire for springs
Synthetic diamond
Microdrill
Composite material for substrates
and heat sinks (CMSH)
Epoxy-coated steel wire
for prestressed concrete
Steel cord

Cemented carbide insert

Cemented carbide insert
Anti-wear, anti-shock cutting tool "IGETALLOY"

Responding to the needs for high-speed, high-efficiency and high-precision machining, "IGETALLOY" insert works as a mechanical interface between machine and material, playing a prominent role in the fields such as cutting and plastic working.

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Synthetic diamond

Synthetic diamond
Key material in various fields

Large-sized synthetic monocrystal diamond realizes stable supply of high-quality diamond products. The stable quality makes it ideal material for industrial applications. Manufactured in the facilities under thorough quality control, Sumitomo Electric's synthetic diamond guarantees consistent high quality.

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 End mill & drill

 End mill & drill
Enhances the machining efficiency for machine parts and molds

Sumitomo Electric's end mills and drills are made from an alloy that has hardness next to diamond and the steely toughness. A wide array of grades is available for various applications.

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 Microdrill

 Microdrill
Ultra-small-diameter drill for drilling of printed circuit board

Sumitomo Electric's microdrill has proprietary drill tip shape and resolves problems such as rough hole wall. A wide array of grades is offered for various printed circuit materials and diverse machining conditions.

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Powder metallurgical parts

Powder metallurgical parts
High-precision, high-strength machine parts

Use of rapidly-solidified aluminum powder provides high level of strength, wear resistance, and heat resistance that cannot be achieved with molten alloy. Compared with conventional aluminum products, our products excel in machining characteristics and thereby meet demands for weight reduction of automotive parts.

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 Composite material for substrates and heat sinks (CMSH)

 Composite material for substrates and heat sinks (CMSH)
Heat sink for high-power semiconductor devices

CMSH is a combination of two or more different metals, such as copper-tungsten, made by metallurgical process. This product has excellent heat conductivity and features thermal expansion coefficient close to IC chips and peripheral materials.

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Bonding tool

Bonding tool
Tool for high-density packaging of IC chips

In TAB bonding, bonding tool is used to thermally bond the lead wires to an IC chip. Sumitomo Electric's bonding tool, which has a tip made of chemical vapor deposition (CVD) diamond or other material, supports low-cost and high-reliability packaging.

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Epoxy-coated steel wire for prestressed concrete

Epoxy-coated steel wire for prestressed concrete
Heart of large building structure

Epoxy-coated steel wire is an internal reinforcement for prestressed concrete. It has high-strength and small cross-section area, and is cost efficient because it does not need coating process. The DYWIDAG method, which Sumitomo Electric holds the right in Japan to implement, is adopted to use prestressed concrete in many bridges and other large structures.

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Steel wire for springs

Oil-tempered steel wire for valve springs
Steel wire for springs that is usable under high stress condition

This steel wire is used for automotive valve springs and torque converter springs, which are required to have good fatigue resistance under high stress conditions. As automobiles are becoming more lightweight and fuel-efficient, the demand for oil-tempered wire with higher fatigue resistance is increasing and Sumitomo Electric's proprietary steel wire is hence used widely.

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Steel cord

Steel cord
Contributes to improved driveability and comfortable ride

Steel cord is used for the reinforcement of radial tires. Sumitomo Electric's patented steel cord features excellent adhesiveness with rubber, and satisfies not only the basic properties required for automobile tires, but also more advanced and diversified needs of customers.

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