公开(公告)号：US20230287529A1

公开(公告)日：2023-09-14

申请号：US17927057

申请日：2021-07-22

Applicant: SOOCHOW UNIVERSITY

Inventor： Shaoyan HU ,  Rong ZHU ,  Deyong WANG

IPC: C21C5/34 ,  C21C5/46

CPC classification number: C21C5/34 ,  C21C5/4606 ,  C21C2005/4626

Abstract: A blowing control method for maintaining a mushroom head of a bottom-blowing nozzle converter is disclosed. Considering the actual state of the mushroom head at the end of the bottom-blowing nozzle tip, the real-time molten steel overheating change during the blowing process, the process requirements of different stages of blowing conversion, and the macroscopic heat balance of the converter, the oxygen-carbon dioxide-lime powder blowing parameters of the inner tube of the bottom-blowing nozzle are dynamically adjusted during the converter smelting process of the bottom-blowing nozzle converter so as to control the cooling intensity, thus achieving precise control of the size of the mushroom head. The present invention maintains the basic stability of the size of the mushroom head at the end of the bottom-blowing nozzle tip, avoiding nozzle blockage caused by an oversized mushroom head and rapid erosion of the nozzle caused by an undersized mushroom head.

公开(公告)号：US20230279573A1

公开(公告)日：2023-09-07

申请号：US17802938

申请日：2021-08-23

Applicant: SOOCHOW UNIVERSITY

Inventor： Huihua WANG ,  Yingjun XU ,  Shizhan SHENG ,  Deyong WANG ,  Tianpeng QU ,  Jun TIAN ,  Dong HOU ,  Xianglong LI ,  Shaoyan HU

IPC: C25D3/12 ,  C25D5/50 ,  C25D17/10 ,  C25D7/06

CPC classification number: C25D3/12 ,  C25D5/50 ,  C25D17/10 ,  C25D7/0614

Abstract: The present invention provides an in-situ method for synthesizing a Ni—W—WC composite coating, which includes the following steps: immersing a carbon steel substrate to be coated in an electroplating solution and electroplating, to obtain a Ni—W—C alloy coating on the surface of the carbon steel substrate; and then subjecting the alloy coating to high temperature heat treatment to obtain the Ni—W—WC composite coating. The electroplating solution comprises the following components: a nickel salt, a tungstate, citric acid, a citrate, a recarburizer, and a wetting agent. The present invention shows merits of simple operation, high current efficiency, simple electroplating process, and is clean and causes no pollution, thus meeting the requirements of environment protection.