Hyundai Motor Company

Kia Motors Corporation

Kia Corporation

Hyundai Steel Company

Jae-Yoon Hwang

Min-Woo Kang

Seung-Hyun Hong

Shin-Woong Jeong

Soon-Jae Won

Sang-Min Song

Disclosed is a method for manufacturing high-carbon bearing steel, which include: heating a billet at a temperature of about 950 to 1,050&#xb0; C. for about 70 to 120 minutes, rolling the billet to manufacture a wire rod, winding the wire rod to manufacture a wire rod coil, cooling the wire rod coil, and subsequently heat treating the wire rod coil for spheroidizing and carbonitriding, respectively. The bearing steel may include an amount of about 0.9 to 1.3 wt % of carbon (C), an amount of about 1.1 to 1.6 wt % of silicon (Si), an amount of about 1.0 to 1.5 wt % of manganese (Mn), an amount of about 1.5 to 1.9 wt % of chromium (Cr), an amount of about 0.2 to 0.6 wt % of nickel (Ni), an amount of about 0.1 to 0.3 wt % of molybdenum (Mo), and the balance iron (Fe) based on the total weight thereof.

Method for manufacturing high-carbon bearing steel and high-carbon bearing steel manufactured therefrom

Growing community of inventors

Seoul, South Korea

Jae-Yoon Hwang