Wear-resistant mechanical component and method of producing the same
A wear-resist mechanical component used in a frictional contact area requiring wear-resistance and a method of producing the same is provided. The method comprises the steps of: depositing hard particles of one or more substances selected from the group consisting of carbides, nitrides and borides on an iron-based metal body to a predetermined thickness; depositing binder powders atop of the hard particle layer to a predetermined thickness; and heating the hard particles, the binder powders and the iron-based metal body, so that the iron-base metal body and the hard particles are bonded together. This can obtain a wear-resistant mechanical component having high hardness and excellent wear resistance without having to go through the step of mixing hard particles with binder to form the mixture. The super-hard alloy can be bonded to the base metal body regardless of the shape of the base metal body.
1 . A method of producing a wear-resistant mechanical component comprising the steps of:
depositing hard particles of one or more substances selected from the group consisting of carbides, nitrides and borides on an iron-based metal body to a predetermined thickness;
depositing powders of binder atop of the hard particle layer to a predetermined thickness; and
heating the hard particles, the binder powders and the iron-based metal body, so that the iron-base metal body and the hard particles are bonded together.
2 . A method as recited in claim 1 , further comprising the step of compressing the deposited hard particle layer with a predetermined pressure, after the step of depositing the hard particles on the iron-based metal body.
3 . A method as recited in claim 2 , wherein the predetermined pressure at the step of compressing the hard particles is in the range of 10 to 5,000 kg/cm 2 .
4 . A method as recited in claim 1 , wherein the binder powders contain boron (B) in the amount of 1 to 5 wt %, silicon (Si) in the amount of 1 to 5 wt %, chromium (Cr) in the amount of 5 to 10 wt %, iron (Fe) in the amount of 1 to 5 wt %, on the basis of the total weight of the entire composition of the binder, and balance nickel.
5 . A method as recited in claim 4 , wherein the binder is added in the amount of 1 to 5 times greater than the hard particles by weight.
6 . A method as recited in claim 1 , wherein the step of heating is performed for 5 minutes to 10 hours at a temperature of 980° C. to 1,200° C.
7 . A method as recited in claim 1 , wherein the binder powders contain carbon (C) in the amount of 0.01 to 1 wt %, boron (B) in the amount of 0.5 to 10 wt %, silicon (Si) in the amount of 3 to 12 wt %, chromium (Cr) in the amount of 2 to 20 wt %, iron (Fe) in the amount of 0.1 to 4 wt %, on the basis of the weight of the entire composition of the binder, and balance nickel.
8 . A method as recited in claim 7 , wherein the binder powders are added in the amount of 0.2 to 4 times greater than the hard particles by weight.
9 . method as recited in claim 1 , wherein the binder powders contain boron carbide (B 4 C) in the amount of 0.6 to 11 wt %, silicon (Si) in the amount of 3 to 12 wt %, chromium (Cr) in the amount of 2 to 20 wt %, iron (Fe) in the amount of 0.1 to 4 wt %, on the basis of the weight of the entire composition of the binder, and balance nickel.
10 . A method as recited in claim 4 , wherein the binder powders are prepared by mixing the respective element of the powders.
11 . A method as recited in claim 4 , wherein the binder powders comprises powders of alloy of the respective binder element.
12 . A wear-resistant mechanical component produced by the method as recited in claim 1.