The application of the vacuum degassing technique in steel plant in order to obtain new quality grades in non-oriented magnetic steel sheet

Vacuum ◽  
1987 ◽  
Vol 37 (5-6) ◽  
pp. 481-483
Author(s):  
I Ibarrondo
Keyword(s):  
Steel Sheet ◽  
Steel Plant ◽  
Vacuum Degassing ◽  
Magnetic Steel

The Coating Fragile Phase Thickness Measure Methods of Galvannealed Steel Sheet

2011 ◽  
Vol 239-242 ◽  
pp. 1707-1710 ◽  
Author(s):  
Yan Wen Zhang ◽  
Ji Hui Wang ◽  
Yu Chen
Keyword(s):  
Steel Sheet ◽  
Sheet Steel ◽  
Steel Plant ◽  
Observation Methods ◽  
Fe Content ◽  
Thickness Measure ◽  
Measure Methods ◽  
Phase Thickness ◽  
Galvannealed Steel

Powdering and desquamation is prone to happen when galvannealed sheet steel is stampinged and Powdering or desquamation often happens at the fragile phase where Fe content is high. The fragile phase thickness of the coating of galvannealed steel sheet is correlative nearly to the coating anti-pulverization ability.So it is very important to measure the fragile phase thickness with the research of galvannealed sheet steel process. The fragile phase thickness of the same batch galvannealed sheet steel made by some steel plant is about 560~590nm when it is measured by glow ischarge spectrometer , fracture observation methods by SEM and metallographic microscope, the error is very little.

JNHF-CORE

Alloy Digest ◽  
2005 ◽  
Vol 54 (1) ◽  
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Steel Sheet ◽  
Core Loss ◽  
Chemical Vapor ◽  
Silicon Steel ◽  
Soft Magnetic ◽  
High Frequencies ◽  
Saturation Induction ◽  
Magnetic Steel

Abstract JNHF-Core is a chemical vapor deposition (CVD) processed, nonoriented, high-silicon soft magnetic steel sheet that has a silicon density gradient of between 3 to 6.5 wt.%. The silicon steel sheet consists of three gradated silicon density areas, a high-Si area, a low-Si area, and another high-Si area, which draws out excellent low core loss at high frequencies and has high saturation induction. This datasheet provides information on physical properties. Filing Code: FE-135. Producer or source: JFE Steel Corporation.

Vacuum Degassing Yields Stronger Steel

1998 ◽  
Vol 120 (04) ◽  
pp. 54-58 ◽  
Author(s):  
Michael Valenti
Keyword(s):  
Life Cycles ◽  
High Availability ◽  
Steel Plant ◽  
Vacuum System ◽  
Vacuum Degassing ◽  
Competitive Edge ◽  
Steel Making ◽  
The Future ◽  
Quality Of Products

This article discusses the vacuum degassing technology that improves quality of products and shortens processing cycles. This technology is becoming more popular thanks to the greater demand for better steels by customers in the automotive, construction, and rail markets. The future of vacuum-degassing systems is bright, in spite of their hefty price tag. Kvaerner Metals has built vacuum-degassing systems costing $25 million on the low end up to $55 million for its steel-making clients. Maintenance of the vacuum system is an ongoing challenge for the steel plant. To maintain high availability, routine searches and repair of air leaks is required. Special attention is needed for the refractory systems to maximize their life cycles. Despite those concerns, Kvaerner Metals’ Holmes remarked that vacuum-degassing systems are likely to become more widely used by major steel companies striving to keep their competitive edge in the niche applications now under assault by smaller competitors already equipped with the equipment.

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