一种利用脉冲电流改善夹杂物润湿性的装置及方法
By setting a consumable electrode in the immersion nozzle and applying a pulsed current, the technical defects of inclusion wettability control in the prior art are solved, the inclusion size is reduced and homogenized, the billet quality is improved, the operation process is simplified, and the cost and energy consumption are reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- UNIV OF SCI & TECH BEIJING
- Filing Date
- 2022-12-05
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies for controlling inclusion wettability suffer from problems such as the introduction of foreign inclusions through chemical means, lengthy processes, high costs, and high energy consumption. Furthermore, pulsed current treatment methods have failed to effectively suppress the aggregation and growth of non-metallic inclusions in submerged entry nozzles, thus affecting the quality of cast billets.
A consumable electrode is installed in the immersion nozzle of the metal ingot solidification device and electrically connected to a pulse current device through a metal wire. A pulse current is applied to reduce the interfacial tension between the molten steel and inclusions and improve wettability. The specific process parameters are: current 1-5000A, frequency 1Hz-100kHz, pulse width 1μs-1000ms, and voltage 0.1-36V.
It significantly reduces inclusion size by 50-70%, improves inclusion homogenization by 40-60%, reduces the contact angle between molten steel and inclusions by 20-40%, reduces molten steel surface tension by 20-40%, reduces interfacial tension by 35-60%, improves the distribution of inclusions in the billet, avoids nozzle blockage, and improves product quality.
Smart Images
Figure CN115870481B_ABST