Effect of alloying and residual elements on strength and hot ductility of cast cupro-nickel

JOM ◽  
1978 ◽  
Vol 30 (3) ◽  
pp. 20-25 ◽  
Author(s):  
J. P. Chubb ◽  
J. Billingham ◽  
P. Hancock ◽  
C. Dimbylow ◽  
G. Newcombe

A high strength, corrosion resistant cupro-nickel casting alloy having good intermediate temperature ductility and controlled corrosion behaviour has been developed for use in sea water cooling systems. Welding for repair and fabrication may be required with such components and this property is related to hot ductility behaviour. The latter was assessed by using a modified Gleeble apparatus which enabled specimens to experience a simulated weld thermal cycle followed by fracture at a high strain rate during cooling. These alloys usually show a reduced ductility at intermediate temperature (600 °C) associated with intergranular failure.


The problems of hot shortness and overheating have beset the metallurgist, forgemaster and smith for a surprisingly long time. In recent years the increase in electric steelmaking has emphasized the difficulties arising from the steady build up of residual elements which is the inexorable consequence of scrap recirculation. Although many of the early investigations considered the influence of individual trace elements on hot ductility, in practice such relatively simple situations seldom arise. More often than not it is the interaction between a combination of trace elements which has to be understood if their net influence on high temperature mechanical properties is to be evaluated. This survey of the present state of knowledge in this field therefore places particular emphasis on the need for an understanding of the interactions between trace elements


Author(s):  
J. R. Porter ◽  
J. I. Goldstein ◽  
D. B. Williams

Alloy scrap metal is increasingly being used in electric arc furnace (EAF) steelmaking and the alloying elements are also found in the resulting dust. A comprehensive characterization program of EAF dust has been undertaken in collaboration with the steel industry and AISI. Samples have been collected from the furnaces of 28 steel companies representing the broad spectrum of industry practice. The program aims to develop an understanding of the mechanisms of formation so that procedures to recover residual elements or recycle the dust can be established. The multi-phase, multi-component dust particles are amenable to individual particle analysis using modern analytical electron microscopy (AEM) methods.Particles are ultrasonically dispersed and subsequently supported on carbon coated formvar films on berylium grids for microscopy. The specimens require careful treatment to prevent agglomeration during preparation which occurs as a result of the combined effects of the fine particle size and particle magnetism. A number of approaches to inhibit agglomeration are currently being evaluated including dispersal in easily sublimable organic solids and size fractioning by centrifugation.


Alloy Digest ◽  
2004 ◽  
Vol 53 (11) ◽  

Abstract HP magnet steel is designed for use wherever high magnetic permeability or high saturation values are required. Its magnetic qualities result from careful control of sulfur and residual elements plus the special deoxidization practice, which minimizes nonmetallic inclusions. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: CS-144. Producer or source: ISG Plate International Steel Group Inc.


2021 ◽  
Vol 28 (3) ◽  
pp. 422-429
Author(s):  
Yong-jin Wang ◽  
Shuai Zhao ◽  
Ren-bo Song ◽  
Bin Hu

2020 ◽  
pp. 116612
Author(s):  
Shao-Wen Young ◽  
Mitsutaka Sato ◽  
Kazuhiro Yamamitsu ◽  
Yusuke Shimada ◽  
Yongjie Zhang ◽  
...  

2021 ◽  
Vol 31 (1) ◽  
pp. 11-23
Author(s):  
Hany Rizk AMMAR ◽  
Muneer BAIG ◽  
Asiful Hossain SEIKH ◽  
Jabair Ali MOHAMMED

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