Sumitomo Electric Industries, Limited

Sumitomo Electric Hardmetal Corp.

Yoshimitsu Sawazono

Katsuya Uchino

Yoshihiro Minato

A lightweight material for decorative parts having a silver metallic color tone is provided. The material includes a sintered body including a main hard phase composed of a solid solution formed of titanium carbonitride and titanium carbide; a main binder phase composed of nickel; a first additive material composed of at least one selected from the group consisting of molybdenum carbide, niobium carbide, tungsten carbide, and tantalum carbide; a second additive material composed of at least one of chromium and chromium carbide; and the balance being incidental impurities. The N content in the sintered body is 2.0% to 6.0% by mass. The color tone of the sintered body satisfies L*=9 to 14, a*=&#x2212;2 to 3, and b*=&#x2212;6 to 0, which are values of the L*a*b* color system measured with a spectrophotometric colorimeter.

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Hyogo, Japan

Yoshimitsu Sawazono