CN1546714A

CN1546714A - Frangible nickel-copper-iron alloy

Info

Publication number: CN1546714A
Application number: CNA2003101155942A
Authority: CN
Inventors: 盛国大
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-04
Filing date: 2003-12-04
Publication date: 2004-11-17
Anticipated expiration: 2023-12-04
Also published as: CN1221679C

Abstract

The invention relates to a frangible nickel-copper-iron alloy for alloying in steel production, wherein the alloy comprises (by wt%) Cu 35-46%, Fe 5-20%, Si 4-7.5%, Ni for balancing. The alloy is destructible since it has good frangibility.

Description

Frangible nickel-copper-iron alloy

Technical field

The present invention relates to a kind of alloying agents of making steel usefulness, particularly a kind of frangible nickel-copper-iron alloy.

Background technology

Produce nickeliferous and/or copper bearing steel, during as stainless steel, weathering steel, pipe line steel, all will in molten steel, add metallic nickel and/or metallic copper.Traditional nickel that is used for alloying and/or copper generally are metal nickel plate or copper coin.Along with the development of steel-smelting technology, the automatization feeding equipment that has automatic weighing and adding apparatus is widely used among the steel mill.Traditional nickel plate and copper coin be not owing to size greatly is suitable for this kind equipment, thus need to nickel plate, copper coin shear, break process.Because nickel and copper have good toughness and ductility, thereby specific equipment need be set they are processed into fritter, this certainly will strengthen steel-making cost.If providing a kind of is easy to broken nickel-copper-iron alloy then can eliminates above-mentioned shortcoming.In addition, because nickel and copper are expensive metal, should produce described nickel-copper-iron alloy with the nickel and the copper that reclaim as far as possible, the surplus of the harmful element in the control alloy is again an essential difficult problem that solves.

Summary of the invention

The object of the present invention is to provide a kind of frangible nickel-copper-iron alloy that is used for the molten steel alloying, it contains (wt%):

Cu:35～46%, Fe:5～20%, Si:4～7.5%, Ni: surplus.

Described nickel-copper-iron alloy also contains (wt%):

C smaller or equal to 0.10%, the P smaller or equal to 0.5%, the S smaller or equal to 0.04%, the Sn smaller or equal to 0.5%, the Pb smaller or equal to 0.3% reaches the Zn smaller or equal to 0.3%.

As previously mentioned, metallic nickel and copper and alloy thereof are difficult for fragmentation owing to having good toughness and ductility, in order to improve the fragility of nickel-copper alloy, can make this alloy contain 4～7.5% Si.The Ni-Cu-Fe alloy that contains 4～7.5% Si has good fragility, can use simple method, as hand bumping with its fragmentation.But silicon is unsuitable too high, and because of silicon easily oxidation at high temperature, recovery rate is lower, and silicon is too high certainly will to increase cost of alloy and steel-making cost, and therefore, silicon should be controlled at below 7.5%.

For satisfying the requirement of steel-smelting technology standard, the reply detrimental impurity is controlled, and the detrimental impurity that is included in the Ni-Cu-Fe alloy of the present invention comprises, S, P, Pb, Sn and Zn.Yet the content that needs only them is controlled at wt% respectively):

S≤0.04％，P≤0.5％，Pb≤0.3％，Sn≤0.5％，Zn≤0.3％。

Just can satisfy the requirement of steel-smelting technology standard.

The smelting technology step of Ni-Cu-Fe alloy of the present invention is as follows:

1, prepares burden according to the target composition;

2, will meet ratio of components, mainly be place induction furnace to melt through nickel and copper that recovery gets;

3, treat to add ferrosilicon behind the furnace charge fine melt;

4, the impurity such as silt particle that bring with the removal raw material with lime and fluorite slag making;

5, behind the accurate adjustment composition alloy is poured out;

6, be broken into the granularity that needs after the cooling by hand.

Ni-Cu-Fe alloy of the present invention has good fragility, can be broken into required granularity by hand at an easy rate, to satisfy the requirement of automatization feeding equipment.

Ni-Cu-Fe alloy of the present invention owing to selecting materials, when preparing burden harmful element carried out effective control, makes its content can satisfy the requirement of steel-smelting technology standard.

Embodiment

Further specify the present invention below by embodiment.

Embodiment

According to target composition is prepared burden with the nickel and the copper that reclaim, and controls the content of harmful element wherein by chemical analysis;

With above-mentioned nickel and the copper of induction furnace fusing, until its fine melt;

Add ferrosilicon, make the content of Si meet the requirement of target composition, when adding ferrosilicon with 4: 1 lime and fluorite slag making, with removal impurity;

The Chemical Composition of stirring, analysis and accurate adjustment alloy treats that alloy ingredient comes out of the stove after qualified;

After treating the cooling of above-mentioned alloy, it is broken into≤granularity of 50mm with iron hammer.

The composition of above-mentioned alloy is (wt%):

Cu:37%, Fe:7%, Si:5.0%, Pb:0.16%, Zn:0.12%, Sn:0.36%, C:0.08%, P:0.02%, S:0.035%, Ni: surplus.

Above-mentioned alloy is used for the alloying of weathering steel, and this alloy adds with automatic feeding device.The weather-proof molten steel that carries out alloying with this alloy meets the technical specifications of this steel grade fully.

Claims

1, a kind of frangible nickel-copper-iron alloy that is used for steelmaking alloy, it contains (wt%):

Cu:35～46%, Fe:5～20%, Si:4～7.5%, surplus is Ni.

2, the frangible nickel-copper-iron alloy that is used for steelmaking alloy as claimed in claim 1, it also contains (wt%): C≤0.10%, P≤0.5%, S≤0.04%, Sn≤0.5%, Pb≤0.3%, Zn≤0.3%.