Effects of Dezincification on Continuous Caster Spray Nozzle Assemblies

被引：0
|
作者：
Dalley, A. M. [1 ]
Natarajan, T. T. [1 ]
Koenig, R. M. [2 ]
Borges, E. K. [2 ]
机构：
[1] US Steel Corp, Res & Technol Ctr, 800 E Waterfront Dr, Munhall, PA 15120 USA
[2] US Steel Corp, Gary Works, Gary, IN 46402 USA
来源：
AISTECH 2013: PROCEEDINGS OF THE IRON & STEEL TECHNOLOGY CONFERENCE, VOLS I AND II | 2013年
关键词：
Radial Streak; Ghost-line; Segregation; Caster; Bender; Dezincification; Spray; Nozzle; and C33000 Brass;
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Several instances of "ghost-lines" (surface roughness caused by micro-segregation in cold-rolled and formed automotive sheet product) occurred at a continuous caster at United States Steel Corporation's Gary Works. These incidents were traced to the malfunction of water spray nozzle assemblies (SNAs) in the bender segment. Unusual cracking of some SNAs made of C33000 brass was found to be caused by dezincification, a galvanic corrosion reaction governed by environmental conditions, where zinc leaches away, leaving behind a porous, weak copper-rich material. This paper explores the metallurgy of the dezincification mechanism, and the effects of the SNA cracking on the spray cooling.
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收藏
页码：1417 / 1426
页数：10
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