US Patent Issued to Guannan Chu, HARBIN INSTITUTE OF TECHNOLOGY, WEIHAI on March 25 for "Preforming method for high-strength steel variable-diameter tubular part" (Chinese Inventors)

ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,617, issued on March 25, was assigned to Guannan Chu (Weihai, China) and HARBIN INSTITUTE OF TECHNOLOGY, WEIHAI (Weihai, China).

"Preforming method for high-strength steel variable-diameter tubular part" was invented by Guannan Chu (Weihai, China), Lei Sun (Weihai, China), Wencai Xie (Weihai, China), Cunsheng Zhang (Weihai, China), Anying Yuan (Weihai, China), Gang Fang (Weihai, China) and Qin Yang (Weihai, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A preforming method for a high-strength steel variable-diameter tubular part is provided, which belongs to the technical field of metal forming process. The preforming method for a high-streng...