国家/地区 中国（3）
IPC部 B（3） C（3）
IPC大类 B21（3）
IPC小类 C23C（3） B21B（2） C09D（2）
C21D（2） C22C（2）
IPC C23C028/00（3）
发明人
公开年 2023（2）
申请年 2022（3）
专利权人

Coated aluminum-silicon plated steel plate useful in thermoformed component, comprises steel substrate and aluminum-silicon coating coated on the surface of the steel substrate, where the surface of the aluminum-silicon coating is covered with coating.

MA X, JIN X, LIU H, TAN N

Manufacturing high strength alloy steel bolt comprises taking steel for bolt, performing extrusion, hot upsetting, heat treatment and thread machining to obtain bolt blank, and performing galvanizing and zinc-aluminum coating into bolt blank.

ZHOU H

Preparing copper alloy semiconductor lead frame for circuit board, comprises heating copper alloy ingots, removing oxide, aging, adding copper alloy semi-finished product silver plating bath for silver-plated plating treatment, and activating.

CAO G, LI C, XU J, YIN H