CN1080962A

CN1080962A - Rare-earth-copper-iron alloy and manufacture method thereof

Info

Publication number: CN1080962A
Application number: CN 93104899
Authority: CN
Inventors: 夏桂芳; 王芝群; 刘洪程; 陈冬明; 于宏彬
Original assignee: HAI'AN COUNTY COPPER PRODUCT FACTORY
Current assignee: HAI'AN COUNTY COPPER PRODUCT FACTORY
Priority date: 1993-05-12
Filing date: 1993-05-12
Publication date: 1994-01-19
Anticipated expiration: 2013-05-12
Also published as: CN1029484C

Abstract

A kind of rare-earth-copper-iron alloy and manufacture method thereof, can be on the basis of existing copper alloy manufacturing process, equipment, produce rare-earth-copper-iron alloy, than general copper-iron alloy tensile strength height, hardness is big, extensibility is good, and the electric conductivity height has overcome copper-iron alloy effectively and has been prone to iron particle and separates out, present the coarse grain structure separately and show ferromagnetic deficiency.

Description

Rare-earth-copper-iron alloy and manufacture method thereof

The invention relates to the invention of rare-earth-copper-iron alloy and manufacture method thereof, belong to the copper alloy technical field of smelting.

Copper and copper alloy have particularly obtained in the industry such as electronics, electrician using widely in all trades and professions.The electroconductibility of copper, extensibility are good, but tensile strength is low, hardness is low, wear no resistance.In order to overcome the above-mentioned deficiency of copper material, developed diversified copper alloy.Copper-iron alloy is compared with copper, has tensile strength height, advantage that hardness is high, but extensibility, electroconductibility are undesirable, are prone to iron particle and separate out separately, present coarse grain, and show ferromegnetism, therefore are subjected to a lot of restrictions in application.In recent years, thulium is used for alloy smelting and obtains good result.Because the singularity of ferro element, in iron containing alloy, particularly in the copper-iron alloy, do not see the successful technology (referring to the paper " effect of rare earth in copper and copper alloy " of day disclosure special permission JP59-129745 and 1991 the 12nd contained big vast billows of the volume fourth phase " rare earth " magazine) of mixing the thulium alloying both at home and abroad as yet.

The object of the present invention is to provide a kind of copper-iron alloy and manufacture method thereof.

Rare-earth-copper-iron alloy provided by the invention contains micro-rare earth element, for example lanthanum, cerium.Thulium can account for the 0.005-0.007%(weight percent in this alloy, as follows).The content of iron is preferably in 2.5-3.0%, can add zinc 0.1-0.3% in addition, tin 0.01-0.03%, and except that a small amount of other impurity, all the other are copper.

Rare-earth-copper-iron alloy manufacture method provided by the invention comprises following technological process:

A, fusing electrolytic copper;

B, mix iron;

C, mix other metals such as zinc;

D, mix rare earth metal;

E, refining;

F, the moulding of coming out of the stove.

Above-mentioned technology is basic identical with general worked copper iron alloy technology, and different is:

1, in step b, not directly to mix the iron powder fusing, but in advance copper iron master alloy is made in electrolytic copper, iron powder fusing, this master alloy is added in the electrolytic copper that melts in required ratio mix iron again.Manufactured copper iron master alloy can be taked following method, earlier with electrolytic copper fusing (1250 ℃-1300 ℃ of furnace temperature), adds the straight iron powder of 10-15% again, is warmed up to about 1400 ℃, evenly stirs, and copper iron master alloy is made in the tapping casting moulding.

2, between step c and e, increase steps d and mix rare earth metal.For example, mix rare earth lanthanum (la) and cerium (ce), mixed rare earth of lanthanum and cerium can be divided into suitable small blocks, be inserted in the copper iron mixed solution of fusing, evenly stir, melt.

Introduced below in conjunction with specific examples.A kind of rare-earth-copper-iron alloy that adopts aforesaid method to make, adopt following proportioning: iron 2.50%, tin 0.015%, zinc 0.23%, lanthanum and cerium 0.0063%, bismuth 0.002%, lead 0.015%, all the other are copper.This alloy rolling is become sheet material, be cut into 4 * 400 * 1200mm model, compare detection with the copper-iron alloy plate of same specification, the result is as follows:

Test item rare-earth-copper-iron alloy copper-iron alloy

Tensile strength 432.5 393.3

N/mm

Elongation (%) 4.23 3.0

Vickers' hardness 134 131

Rare-earth-copper-iron alloy is compared with copper-iron alloy, and tensile strength raising 9.97%, elongation raising 41%, hardness improve 2.3%, and the mechanical property of rare-earth-copper-iron alloy obviously is better than copper-iron alloy.

Utilize metaloscope to rare-earth-copper-iron alloy and copper-iron alloy comparative observation (two samples are made under identical melting, casting condition), can see, the grain fineness number of rare-earth-copper-iron alloy is the 4-5 level, and the copper-iron alloy crystal grain that does not add rare earth is 3 grades, the obvious refinement of the crystal grain of rare-earth-copper-iron alloy, diminish, crystal grain quantity increases; Matrix is the α phase structure in rare-earth-copper-iron alloy, has a spot of iron particle and rare earth copper particle to be evenly distributed on the grain boundary; And matrix also is block iron particle pockety is arranged the α phase structure on the grain boundary in the copper-iron alloy that does not add rare earth, and crystal grain is thick.After rare earth adds alloy is played the effect of crystal grain thinning, and the refinement of crystal grain impels iron phase to be evenly distributed, and significantly reduces separating out separately of iron particle, has avoided alloy to show ferromegnetism and also can improve electric conductivity 4.5% than general copper-iron alloy in alloy substrate.

Rare-earth-copper-iron alloy provided by the present invention is compared with general copper-iron alloy, has the following advantages:

1, good mechanical property, tensile strength improves 9.97%, and percentage elongation improves 41%, and Vickers hardness improves 2.3%, and wearability is good.

2, grainiess refinement in alloy, diminish, crystal grain significantly increases, and iron phase is evenly distributed in matrix, greatly reduces separating out separately of iron particle, avoids showing ferromagnetism.

3, effectively improved conductance, comparable general copper-iron alloy improves 4.5%.

4, in the annealing process that alloy processing is become a useful person, the speed of inhibiting grain growth effectively, thus keep good mechanical, the electric property of alloy. This point is highly beneficial to processing rare-earth-copper-iron alloy plate.

The manufacture method of rare-earth-copper-iron alloy provided by the present invention has the following advantages:

1, basic identical with general copper alloy smelting process, equipment, need not to increase equipment investment, can implement.

2, technological operation is simple, is convenient to grasp.

3, be convenient to control the effective content of various compositions in the alloy, and avoid occurring the phenomenons such as ingot casting surface pores that copper alloy easily produces in making is serious.

Claims

1, a kind of copper-iron alloy is characterized in that containing micro-rare earth metal in this alloy.

2, rare-earth-copper-iron alloy as claimed in claim 1 is characterized in that contained rare earth metal accounts for the 0.005-0.007%(weight percent of alloy).

3, rare-earth-copper-iron alloy as claimed in claim 1 is characterized in that contained rare earth lanthanum and cerium.

4, rare-earth-copper-iron alloy as claimed in claim 1 is characterized in that the iron that is contained accounts for the 2.5-3.0% of alloy, and zinc accounts for 0.1-0.3%, and tin accounts for 0.01-0.03%.

5, a kind of manufacture method of rare-earth-copper-iron alloy comprises following process steps:

A, fusing electrolytic copper;

B, mix iron;

C, mix other metals such as zinc;

E, refining;

F, the moulding of coming out of the stove.

It is characterized in that, in step b, in advance electrolytic copper and iron powder fusing are made copper iron master alloy, this master alloy is added in the electrolytic copper that melts in required ratio mix iron again; Between step c and step e, increase steps d and mix rare earth metal.

6, manufacture method as claimed in claim 5 is characterized in that earlier electrolytic copper being melted (furnace temperature 1250-1300 ℃) in step b, adds the straight iron powder of 10-15% again, be warmed up to about 1400 ℃, evenly stir, copper iron master alloy is made in the tapping casting moulding.

7, manufacture method as claimed in claim 5 is characterized in that the rare earth metal that mixes is lanthanum and cerium in steps d, lanthanum cerium mixed rear earth is divided into suitable small blocks, is inserted in the copper iron mixed solution of fusing, evenly stirs, melts.