宝钢股份公布国际专利申请：“抗拉强度1700MPa级以上铝硅镀层热成形钢的电阻点焊方法”

Group 1 - The core point of the article is that Baosteel Co., Ltd. has filed an international patent application for a method of resistance spot welding for aluminum-silicon coated hot-formed steel with a tensile strength of over 1700 MPa [1] - The patent application number is PCT/CN2025/090160, and the international publication date is set for October 30, 2025 [1] - Baosteel has announced a total of 55 international patent applications this year, which represents a decrease of 9.84% compared to the same period last year [3] Group 2 - In the first half of 2025, Baosteel invested 1.676 billion yuan in research and development, reflecting a year-on-year increase of 7.77% [3]