CS211126B1 - Alloy for active parts of diamond tools - Google Patents

Abstract

Alloy for active parts of diamond tools. The invention relates to the field of powder metallurgy. The invention addresses the composition of an alloy for active parts of diamond tools, for example circular saws, circular saws, milling cutters, drills, discs for cutting, drilling and processing medium abrasive and abrasive, medium hard to hard stones with a coarse crystalline structure with a high quartz content, such as some types of marble. The essence of the invention is an alloy that contains in mass concentration 25 to 45% copper, 1 to 8% tin, 35 to 65% iron, 1 to 15% nickel and 3 to 20% chromium carbide.

Description

The invention relates to an alloy for the active parts of diamond tools, for example circular saws, blades, milling cutters, drills, blades for cutting, drilling and machining medium abrasive to abrasive, medium hard to hard stones with a coarse crystalline structure with high quartz content .

The alloy of the active part of the diamond tool must have specific mechanical-physical properties, so that the alloy and diamond wear are proportional to the work, so that its properties are perfectly utilized and its economical use at high performance is guaranteed. The alloy of materials must have high hardness and toughness, must be sufficiently abrasion resistant and strong. Further, low thermal expansion of the alloy, good wettability of the diamond and low sintering temperature are required. The desired properties are achieved, in particular, by a suitable choice of the chemical composition of the alloys on the inside of the diamond tool.

At present, the active parts of diamond tools for working said materials are made of alloys on a 5-tin-cobalt (Gu-Sn-Co) warp with a high cobalt (Co) content. This system meets most of the required properties, but cobalt (Co) is a very scarce raw material. The active parts of these diamond tools are manufactured by conventional powder metallurgy processes, most often by sintering under pressure.

Disadvantages of existing alloys are eliminated by the alloy for the active parts of the diamond tools according to the invention, which is characterized in that the alloy contains 20 to 40% copper (Gu), 1 to 8% tin (Sn), 35 to 65% iron ( Fe), 1 to 15% nickel (Ni) and 3 to 20% chromium carbide (Cr CrCg).

The alloy of the composition of the present invention guarantees high diamond utilization, good tool life and consistent performance. The alloy of the active part of the diamond tool is made of available raw materials.

The active parts of the diamond alloy tools of the composition according to the invention are produced by known powder metallurgy processes, in particular by sintering under pressure.

Example 1

Example of alloy composition for active parts-diamond circular saws for cutting abrasive, hard, coarse-crystalline marble with high quartz content, such as Bohdaneč dark, Jablonica, supikovický brown, Horní Lindová dark, Tuhar and the like.

The alloy contains in weight concentration:

% copper (Cu)% tin (Sn)% iron (Fe)% nickel (Ni)% chromium carbide (Cr ^ C ₂ ) »

Example 2

Example of alloy composition for active parts of diamond cutter for grinding crystalline marbles without dolomitic elements and metal oxides such as Slivenec, Great Moravia - white, Zbuzany - light, Sivec and the like.

The alloy contains: (in weight concentration)% copper (Cu)% tin (Sn)% iron (Fe)% nickel (Ni)% chromium carbide (Cr ^ Cj)

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Example 3

Example of alloy composition for active part of diamond core for marble drilling according to example 1.

The alloy contains in weight concentration:

% copper (Cu)% tin (Sn)% iron (Fe)% nickel (Ni)% chromium carbide (Cr ^ Cg)

Example

Example of alloy composition for active parts of diamond marble saw for cutting marble according to example 1.

The alloy contains in weight concentration:

% copper (Cu)% tin (Sn)% iron (Fe)% nickel (Ni)% chromium carbide (Cr ^ Cg)

Claims (1)

SUBJECT OF THE INVENTION Alloy for active parts of diamond tools, such as diamond circular saws, blades, milling cutters, drills, blades for cutting, drilling and machining medium abrasive and abrasive, medium hard to hard stones with coarse crystalline structure with high quartz content, such as some types of marble characterized in that it contains by weight 20 to 45 96 copper (Cu), 1 to 8% tin (Sn), 35 to 65% iron (Fe), 1 to 15% nickel (Ni) and 3 to 20% chromium carbide (C 1 -C 6).