Method for quenching of steel member, quenched steel member, and agent for protecting quenched surface
AssigneeNihon Parkerizing Co., Ltd.
InventorsMasaaki Beppu, Hidehisa Sakuta, Kazuhiko Mori
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Abstract
A technique for increasing mechanical strength, such as contact pressure strength, and abrasion resistance and bending fatigue strength, of mechanical and/or structural parts by using surface hardening treatment. A quenched steel member, wherein a hard nitride layer is formed on the surface of a steel material, and an inorganic compound layer containing at least one metal oxide selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, W, Mo and Al is formed on the hard nitride layer.
Claims20
A quenched steel member, wherein a hard nitride layer is formed on the surface of a steel material and an inorganic compound layer containing at least one metal oxide selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, W, Mo and Al is formed on the hard nitride layer.
A process for quenching steel members, which comprises contacting a steel material having a hard nitride layer over its surface with a ceramic precursor-containing liquid containing at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, W, Mo and Al before carrying out a quenching treatment.
A process for producing quenched steel members, which comprises contacting a steel material having a hard nitride layer over its surface with a ceramic precursor-containing liquid containing at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, W, Mo and Al before carrying out a quenching treatment.
A surface protective agent for quenching, comprising a ceramic precursor-containing liquid containing at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, W, Mo and Al.
Dependencies are inferred from the claim text.