Gangyan Gaona and Sichuan Gangyan Gaona applied for patents related to GH4730 shaft forging components, adjusting element content to improve alloy performance and meet service requirements.

March 28 news, information from the National Intellectual Property Administration shows that Beijing GRINM HiNan Technology Co., Ltd., and Sichuan GRINM HiNan Forging Co., Ltd. have applied for a patent titled “Method for Preparing GH4730 Alloy Axle Forging and Axle Forging.” The application publication number is CN121737610A, the application number is CN202610243686.X, the application publication date is March 27, 2026, and the application date is March 2, 2026. The inventors are Xie Xingfei, Qu Jinglong, Chen Chaolin, Tang Chao, and Du Jinhui. The patent agency is Beijing Chaofan Hongyu Intellectual Property Agency Co., Ltd., and the patent agent is Wang Huan. Classification numbers are C22F1/10, C21D9/28, and C22C19/03.

The patent abstract states that the invention relates to the field of alloy processing technology, and in particular to a method for preparing a GH4730 alloy axle forging and an axle forging. Specifically, it includes: (a) hot extrusion of GH4730 alloy bar stock at 1100~1190℃ to obtain an axle forging. During hot extrusion, the extrusion ratio is 1﹕ (4~6), and the extrusion speed is 5~20s‑1; (b) performing solution treatment and aging on the axle forging. In the GH4730 alloy, in terms of mass percentage, the C content is 0.005%~0.018%, the P content is 0.003%~0.01%, and the Cu content is 0.005%~0.05%. This invention adjusts the contents of specific elements C, P, and Cu in the GH4730 alloy. It not only effectively improves the hot workability of the GH4730 alloy, but also significantly enhances the creep resistance and anti-fatigue performance of the prepared GH4730 alloy axle forging at 750℃, meeting higher service performance requirements.

GRINM HiNan was established on November 8, 2002, and was listed on the Shenzhen Stock Exchange on December 25, 2009. Its registered address and office address are both in Beijing. It is a leading enterprise in the domestic high-temperature alloy field, with core business in high-temperature alloy materials, and it has advantages in technology and the full industrial chain.

The Shenwan industry classification for GRINM HiNan includes National Defense Military Industry - Aviation Equipment II - Aviation Equipment III. It involves concept segments such as aerospace defense and military industry, aviation engines, and commercial aerospace (aerospace aviation), among others. The company mainly engages in the research, production, and sales of high-temperature materials for industries such as aerospace and power, and it also manufactures equipment for casting high-temperature, heat-resistant alloy castings.

In 2025, GRINM HiNan achieved operating revenue of RMB 3.697 billion. Among 13 companies in the industry, it ranked 7th. The industry leader, Sinomach Shares, had RMB 29.086 billion; the second, AVIC Engine Components, had RMB 24.212 billion. The industry average was RMB 7.536 billion, and the median was RMB 3.697 billion. In terms of the composition of its main business, casting alloy products were RMB 2.48 billion, accounting for 67.09%; wrought alloy products were RMB 955 million, accounting for 25.84%; new alloy products were RMB 239 million, accounting for 6.46%; and other (supplement) RMB 22.4637 million, accounting for 0.61%. For net profit, in 2025 it was RMB 201 million, ranking 8th in the industry. The industry leader, AVIC Engine Components, was RMB 1.343 billion; the second, AVIC Hi-Tech, was RMB 1.033 billion. The industry average was RMB 339 million, and the median was RMB 209 million.

The recent patent status of Beijing GRINM HiNan Technology Co., Ltd. is as follows:

According to Tianyancha, Sichuan GRINM HiNan Forging Co., Ltd. was established on June 23, 2022, and the legal representative is Fu Rui. Its industry is non-ferrous metal smelting and processing. The company scale is small, registered capital is RMB 150 million, and paid-in capital is RMB 10 million. Its registered address is No. 733, South Taishan Road, Deyang City, Sichuan Province, YinXin. Wuzhou Plaza Phase 1, Building 21, Unit 19-12. Sichuan GRINM HiNan Forging Co., Ltd. has invested in 0 companies externally, participated in 139 bidding/tendering projects, and in terms of property clues it has 0 trademark information items, 54 patent information items, and 17 administrative licenses.

The recent patent status of Sichuan GRINM HiNan Forging Co., Ltd. is as follows:

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