CN102628121A - Manufacturing method of complex copper-zinc alloy shell - Google Patents

Abstract

The present invention relates to a manufacturing method of a complex copper-zinc alloy shell. The method comprises the following steps: 1) sampling: selecting a certain ratio of Zn, C, Mn, Si, Nb, Ti, V, Mo, Cr, Al and Cu; 2) placing the materials in a 5t cover-type resistance furnace for smelting with gas and slag removal, thus carrying out refining with high cleanliness; 3) moulding a shell; 4) carrying out homogeneous annealing treatment for 24 h at of 440 to 460 DEG C. The invention is characterized in that the method optimizes composition of complex copper zinc alloy through experiment and combines with a heat treatment technology, so as to further refine crystal grains and distribution morphology of the second phase of the Cu-Zn alloy, improve stability, strength and toughness of the alloy, and in that the process operation and equipment requirement are simple.

Description

A kind of method of manufacture of complicated copper-zinc alloy housing

Technical field

The present invention relates to a kind of radiating shell, particularly a kind of method of manufacture of the radiating shell of processing by complicated copper-zinc alloy that has that special heat radiation needs.

 

Background technology

In the prior art, various engineerings and workplace all be unable to do without automatic equipment, and some special occasions have strict demand for equipment temperature at work, except some extra cooling of tool and means, also need to adopt the good material of thermal diffusivity usually; The heat-conductive characteristic of copper is very high, yet the reserves of copper are limited, and price was also constantly soaring in recent years, had increased production cost, so in the actual production, often adopts copper-zinc alloy as substituting.

Common copper-zinc alloy is the basis with copper, and zinc is made main adding elements, and it has yellow attractive in appearance, and copper-zinc alloy has good performance of heat dissipation equally, and it is cheap to compare pure Cu, has certain mechanical property again, therefore is used widely.Ordinary copper-zinc binary alloy comprises multiple tissue, and wherein α is the substitutional solid solution of zinc in copper mutually, but the about 38%Zn of normal temperature solid solution has face-centered cubic lattice, and plasticity is good, and the cold and hot working that suits to carry out increases along with dissolving the Zn amount among the Cu, and the solution strengthening effect strengthens; β is the sosoloid of electron compound CuZn for base mutually, has body centered structure.Except α, β mutually, generally also have the γ phase in the copper-zinc alloy, γ is to be the sosoloid of base with the sophisticated electronic compound mutually, has complicated cubic(al)grating, γ phase character is crisp firmly, and is unfavorable to the copper alloy performance.

In order to improve the performance of common copper-zinc alloy; In the prior art, in copper-zinc alloy, add a small amount of tin, aluminium, manganese, iron, silicon, nickel, lead and other elements usually, constitute ternary, quaternary even quinary alloy; Be complicated copper-zinc alloy, also claim special copper-zinc alloy.The tissue of complicated copper-zinc alloy generally can be calculated according to " the zinc equivalent coefficient " of addition element in the copper-zinc alloy.In copper zinc alloy, add a small amount of other alloying elements, α/(alpha+beta) phase region in the Cu-Zn state graph is moved to the left or to the right.So the tissue of special copper-zinc alloy is equivalent in the common copper-zinc alloy to increase or to have reduced the tissue of zinc content usually.For example, in the Cu-Zn alloy, add the tissue behind 1% Si, promptly be equivalent in the Cu-Zn alloy, increase by the alloy structure of 10% Si.So Si " zinc equivalent " is 10.Again for example, if " zinc equivalent coefficient " maximum of Si makes α/(alpha+beta) phase boundary in the Cu-Zn system significantly shift to the copper side, promptly dwindle alpha phase zone strongly.Ni " zinc equivalent coefficient " is negative value, promptly enlarges alpha phase zone.

Multielement enhanced on a small quantity is a kind of approach that improves alloy property; Yet, be polynary complicated sosoloid mutually because the α in the special copper-zinc alloy reaches β mutually, add the γ phase that possibly occur; A spot of element have the influence of two aspects simultaneously; Possibly improve on the one hand solidity to corrosion, the strength property of alloy, then increase the fragility of material on the other hand, influence the performances such as bending and machinability of alloy.So, select and set of dispense just can obtain through a large amount of experiments and comparative analysis than needing for the material of alloy.

 

Summary of the invention

The present invention just provides a kind of method of manufacture of the radiating shell of being processed by complicated copper-zinc alloy that has that special heat radiation needs, and it draws through experiment has good performance of heat dissipation and mechanical property.

Technical scheme of the present invention is following:

A kind of method of manufacture of complicated copper-zinc alloy housing comprises following steps:

1) draw materials, select the raw material of following chemical component weight per-cent:

Zn:?28~30%, C：0.02~0.03%；

Mn：2.1~2.3%； Si：0.15~0.20%，

Nb：0.04~0.06%， Ti：0.02~0.04%，

V：0.05~0.09%， Mo：0.1~0.4%，

Cr：0.55~0.65%， Al：0.06~0.10%

All the other are Cu and impurity;

2) above-mentioned materials is placed melting in the 5t bell-type resistance furnace, degasification slagging-off in fusion process, thus carry out the high-cleanness, high refining;

3) cast the casting mold of housing;

4) handle through the homo genizing annelaing of 440 ° of C～460 ° C of 24 hours.

Characteristics of the present invention are; Through testing the proportioning of the complicated copper-zinc alloy in preferred place; And combine with thermal treatment process; Further refinement Cu-Zn is the crystal grain and second distributional pattern mutually of alloy, improves stability and the intensity and the toughness of this alloy, and technological operation and equipment requirements are simple.

 

Embodiment

Below in conjunction with specific examples technical scheme of the present invention is further specified.Make the radiating shell of processing by complicated copper-zinc alloy that has that special heat radiation needs of the present invention through following steps.

Embodiment 1

1) draw materials, select the raw material of following chemical component weight per-cent:

Zn:?28%, C：0.02%；

Mn：2.1%； Si：0.15%，

Nb：0.04%， Ti：0.02%，

V：0.05%， Mo：0.1%，

Cr：0.55%， Al：0.06%

All the other are Cu and impurity;

2) above-mentioned materials is placed melting in the 5t bell-type resistance furnace, degasification slagging-off in fusion process, thus carry out the high-cleanness, high refining;

3) cast the casting mold of housing;

4) handle through the homo genizing annelaing about 440 ° of C of 24 hours.

The radiating shell that makes carries out the test force performance on the CMT5105 electronic universal tester, and carries out the fracture toughness property experiment in MTS material experiment technology.Through test; The ys of having of adopting that the present invention the makes radiating shell that special heat radiation needs is processed by complicated copper-zinc alloy is 634MPa; Fracture toughness property be 936

; Its grain size distribution is even, when possessing excellent heat dispersion performance, also has good mechanical property.

 

Embodiment 2

1) draw materials, select the raw material of following chemical component weight per-cent:

Zn:?30%, C：?0.03%；

Mn：2.3%； Si：?0.20%，

Nb：0.06%， Ti：?0.04%，

V：?0.09%， Mo：0.4%，

Cr：?0.65%， Al：?0.10%

All the other are Cu and impurity;

2) above-mentioned materials is placed melting in the 5t bell-type resistance furnace, degasification slagging-off in fusion process, thus carry out the high-cleanness, high refining;

3) cast the casting mold of housing;

4) handle through the homo genizing annelaing about 460 ° of C of 24 hours.

The radiating shell that makes carries out the test force performance on the CMT5105 electronic universal tester, and carries out the fracture toughness property experiment in MTS material experiment technology.Through test; The ys of having of adopting that the present invention the makes radiating shell that special heat radiation needs is processed by complicated copper-zinc alloy is 647MPa; Fracture toughness property be 867

; Its grain size distribution is even, when possessing excellent heat dispersion performance, also has good mechanical property.

Claims (1)

1. the method for manufacture of a complicated copper-zinc alloy housing is characterized in that, comprises following steps:

1) draw materials, select the raw material of following chemical component weight per-cent:

Zn:?28~30%, C：0.02~0.03%；

Mn：2.1~2.3%； Si：0.15~0.20%，

Nb：0.04~0.06%， Ti：0.02~0.04%，

V：0.05~0.09%， Mo：0.1~0.4%，

Cr：0.55~0.65%， Al：0.06~0.10%

All the other are Cu and impurity;

2) above-mentioned materials is placed melting in the 5t bell-type resistance furnace, degasification slagging-off in fusion process, thus carry out the high-cleanness, high refining;

3) cast the casting mold of housing;

4) handle through the homo genizing annelaing of 440 ° of C～460 ° C of 24 hours.