Abrasion-resistant material

Details Abrasion-resistant material Abrasion-resistant material

1998-02-19

1999-11-16

Yee, Deborah

Metal treatment

Stock

Ferrous

148612, C21D 500, C22C 3706, C22C 3700

Patent

active

059850523

ABSTRACT:
An abrasion-resistant material is constructed from gray iron alloyed with 0.30 to 0.70% phosphorous. The high phosphorous cast iron alloy is heat treated for approximately 120 minutes to an austenitizing temperature of about 1600.degree. F. Next, the alloy is austempered for approximately 180 minutes at about 580.degree. F. The resulting abrasion-resistant structure is an acicular ferrite in stable austenite (ausferrite) with islands of a non-continuous, broken network of steadite of approximately 8 to 10% by volume, which has a material hardness of 280 to 330 BHN.

REFERENCES:
patent: 4088476 (1978-05-01), Takao et al.
patent: 4484953 (1984-11-01), Kovacs et al.
patent: 5370170 (1994-12-01), Sander et al.
patent: 5753055 (1998-05-01), Liu
Kovacs and Keough, "Physical Properties and Application of Austempered Gray Iron", 1994, pp. 283-291.

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