The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 04, 1977
Filed:
Feb. 27, 1975
Tsuyoshi Morishita, Hiroshima, JA;
Toshio Yamada, Hiroshima, JA;
Toyo Kogyo Co., Ltd., Hiroshima, JA;
Abstract
An abrasion-resistant sliding material is produced by forming a powdery mixture of (a) 70-98% of a eutectic alloy consisting of 0.2-3.0% of boron, 1.0-4.0% of carbon, with the balance being iron, the alloy having a particle size finer than 200 mesh and (b) 2-30% of a second eutectic alloy consisting of 3.0-7.0% phosphorus, 0.5-2.5% of carbon, with the balance being iron, this second alloy also having a particle size finer than 200 mesh, compression molding the resulting mixture into a desired shape at a pressure of 0.5-3.0 t/cm.sup.2, and sintering the resulting molded product at 950.degree.-1130.degree. C. for at least 5 minutes in an atmosphere of an inert gas (e.g., argon, nitrogen, hydrogen) or in a vacuum. The final product is characterized in that it has a porosity not exceeding 7.0%, a pore size not exceeding 50.mu. in diameter, with its structure including portions of iron compounds [Fe.sub.3 (B.C.)], portions where iron and iron compounds are copresent [Fe + Fe.sub.3 (B.P.C.)] and in which the P content is higher at the boundary areas than at the central areas, and portions of fine pores.