Hot working die steel with high thermal strength and high toughness and manufacturing process thereof

US11608550B2 · kind B2 · utility

Assignee

• Rugao Hongmao Heavy-duty Forging Co., Ltd. · CN

Inventors

• Qingchun Zhou · 安丰镇, CN
• Weiming Xu · 安丰镇, CN
• Jincai Gu · 安丰镇, CN
• Jianhui Ge · 安丰镇, CN
• Bowei Zhao · 安丰镇, CN
• Junliang Wu · Shanghai, CN
• Sheng-Lin Ma · Lo Wu, CN

Key dates

• Filing date: Aug 30, 2021
• Grant date: Mar 21, 2023
• Expiry date: Aug 30, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C38/28
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present application relates to the technical field of die steel, and particularly discloses a hot working die steel with high thermal strength and high toughness and a manufacturing process thereof. The hot working die steel with high thermal strength and high toughness includes the following components in percentage by mass: 0.20-0.40% of carbon, 0.05-0.20% of silicon, 0.30-0.60% of manganese, 1.00-4.00% of chromium, 0.50-1.50% of molybdenum, 0.20-0.60% of vanadium, 0.60-1.00% of cobalt, 0.06-0.16% of titanium, 0.03-0.08% of yttrium, 0.03-0.08% of niobium, 0.005-0.012% of phosphorus, 0.003-0.008% of sulfur, and a balance of iron and inevitable impurities.