Making of Steel Strapping and Strip. Semi-Annual Report for Period Ending April 30, 2000

Reilly, Robert D.

Robert Reilly and Associates, Northfield, IL (United States)

关键词: Mechanical Properties;    36 Materials Science;    Production;    Microstructure;    Physical Properties;   

DOI  :  10.2172/763387
RP-ID  :  DOE/GO/10412-S
RP-ID  :  FG36-99GO10412
RP-ID  :  763387

美国|英语

来源: UNT Digital Library

【 摘 要 】

The direction for the heat treating method has been established with input from the work to date on the Northwestern contract for the project entitled ''Effects of Steel Composition and Quench Rate on Microstructure and Mechanical Properties of Strapping''. The conclusion has been accepted by ourselves and Northwestern that our direction to heat treat to a Martensitic microstructure will give us optimum physical properties in the final product. The attached comparison from the American Society of Metals ''Handbook of Quenchants and Quenching Technology'' clearly shows the superiority of this end objective (Quenched and Tempered) as compared to ''Normalized and Tempered'' structures. Present industry practice produces a ''Normalized'' or a close compromise to this structure which is obtained by Quenching in Lead. It is not possible to prevent some lead adherence to products produced in this manner and the industry has been searching for new methods to avoid this environmental hazard which is present not only in the production process but in the product as well It is appropriate to review our production methodology at this time in order to reconfirm the steps taken which have been previously designated by those knowledgeable in the field to be proven in former steel conversion practice.