CN103484713A - High-strength wear-resistant multi-element complex brass alloy drawn pipe bar and manufacture technology thereof - Google Patents

Abstract

The invention discloses a high-strength wear-resistant multi-element complex brass alloy drawn pipe bar which is characterized in that: an alpha phase is taken as a base, and the bar is composed of the following components in percents by weight: 74%-77% of Cu, 7%-8.5% of Al, 2.5%-3% of Fe, 1.1%-1.5% of Ni, 0.9%-1.5% of Mn, 0.25%-0.45% of Pb, 0.1%-0.5% of Sn, and the balance Zn, wherein other impurity elements account for 0.5% or less. The manufacture technology of the bar comprises: a, burdening; b, melting; c, continuous casting; d, extruding; and e, sizing and sawing. Compared with the prior art, the technical scheme of the invention has the advantages that: the brass alloy drawn pipe bar has the performances of high strength, high toughness and wear resistance, good wear resistance mechanism and good brass alloy corrosion resistance by mediums; the uniformity and stability of the multi-element complex brass components are guaranteed; and the technical key problems are solved that the bar are easy to crack and the surface quality is hard to control.

Description

High-strength wear-resistant complex complex brass alloy extrudes bar and manufacture craft thereof

Technical field

The present invention relates to a kind of metal pipe bar, be specifically related to a kind of high-strength wear-resistant complex complex brass alloy and extrude bar and manufacture craft thereof.

Background technology

Copper is the indispensable key project material of development of modern industry, and new copper alloy development exploitation upsurge is in the ascendant both at home and abroad, copper alloy new variety, the new technology of be born large quantities of high-performance, high technology content.

Brass is most important alloy kind in copper alloy, with low-cost excellent property, be world-famous for, the widespread use all fields of national economy, but people's widespread use for a long time is that to take the α phase be the single-phase of base or two-phase brass alloys with alpha+beta mutually, and to take β mutually as the complex brass of base research application less, to take α mutually as the complex brass research application of base still less.Along with the modern science and technology progress, people are day by day deep to complex brass research, discovery is by adding polynary a small amount of alloying element can significantly improve its performance, make the many new features with practical application foreground of material production, as shape memory function, snappiness, high strength, high abrasion, anti-corrosion, Wear vesistance etc.Wherein the most noticeable is that to take β be the new multicomponent complex brass of base mutually, the tool high strength, good Wear Resistance Mechanism, high media-resistant corrosive power, more valuable is its good hot workability, aspect the complicated high-strength wearable part of the various precisions of forging and stamping, there is the incomparable advantage of other materials, popularization and application abroad after the eighties.In recent years, along with the development of domestic processing manufacturing industry, market constantly enlarges the high property copper alloy demand, domesticly to take β, also constantly enlarges as the research and development application of the novel high-strength wear-resistant complex complex brass of base mutually.

But both at home and abroad to take α mutually as the polynary complex brass research of the novel high-performance of base application also very few, mainly because such alloy industry production difficulty is large, especially former process founding technology difficulty, the continuous casting working procedure that economic production in enormous quantities institute must adopt very easily produces implosion or appearance ftractures.But, along with modern science and technology is day by day deep to complex brass research, find that this type of polynary complex brass also has: high strength, high tenacity, good Wear Resistance Mechanism, good hot workability, also have more superelevation media-resistant corrosive power.Therefore develop such high performance alloys kind, there is wide future develop and great economy and be worth.

Summary of the invention

The present invention is in order to solve above-mentioned deficiency, provides a kind of high-strength wear-resistant complex complex brass alloy to extrude bar and manufacture craft thereof.

Above-mentioned purpose of the present invention realizes by following technical scheme: a kind of high-strength wear-resistant complex complex brass alloy extrudes bar, it is characterized in that: the α of take is base mutually, composed of the following components by weight percentage: Cu:74%～77%, Al:7%～8.5%, Fe:2.5%～3%, Ni:1.1%～1.5%, Mn:0.9%～1.5%, Pb:0.25%～0.45%, Sn:0.1%～0.5%, surplus is Zn, other impurity elements≤0.5%.

A kind of high-strength wear-resistant complex complex brass alloy extrudes bar and manufacture craft thereof, comprises the following steps:

A. prepare burden: press alloy proportion batching 2500kg/ stove;

B. melting: first drop into the part copper fusing in smelting furnace, charcoal covers; Drop into manganese, flux covers; Drop into nickel, iron fusing; Dropping into remaining copper fusing stirs; The fusing of input zinc; After dropping into aluminium, lead, tin fusing, add old material; All, after fusing, stir aluminium alloy and make it even in 5～10 minutes, the throwing refining agent that then heats up carries out deslagging refining, the flame refining; It is qualified that sampling detects chemical composition, standing insulation; Standing insulation, skim slag after, converter flow to holding furnace;

C. continuous casting: carry out horizontal casting Φ 140 billets at holding furnace, casting speed is 2.5～4m/h, and " red ingot " draws casting, and sawing becomes spindle;

D. extruding: at Sloping Hearth fuel oil heating or mid freqency induction furnace, spindle is heated to 600～750 ℃, extrusion speed is 15～35mm/s, and extrusion ratio is 15～35, and hot extrusion must extrude pipe/rod, carries out hot aligning;

E. scale sawing.

The present invention's advantage compared with prior art is:

At first, determine suitable brass alloys kind chemical composition, it is base mutually that formation be take α, by the interaction between alloying element, the wear-resisting phase of forming component complexity, uniform and stable distribution, extreme hardness on the complex brass matrix, form reasonable Wear Resistance Mechanism, guarantee material tool excellent wear energy.Made it to possess the ability that high strength, high-toughness wear-resistant, good Wear Resistance Mechanism, high media-resistant corrode copper alloy, it extrudes the state mechanical property: tensile strength: 700～750MPa, hardness HB:180～220, unit elongation >=8%.Can be used as the good substitute material of heavy price bronze, for high strength, high-toughness wear-resistant, media-resistant corrosion copper pipe rod market provide in enormous quantities, high-performance novel material cheaply.

Secondly, solved the gordian technique of its production, employing is suitable for large melting horizontal casting-Hot-extrusion of producing, guaranteed that polynary complex brass composition is uniform and stable, researched and developed the melting horizontal continuous casting process that is applicable to this alloy characteristic, efficiently solved the key problem in technology that it is easy to crack, quality control on the surface is difficult, thereby significantly improved the production lumber recovery, make the production technology maturing, be suitable for extensive industrialization.

The accompanying drawing explanation

Fig. 1 is process flow sheet of the present invention.

Embodiment

Below in conjunction with accompanying drawing, the present invention is described in further detail:

A kind of high-strength wear-resistant complex complex brass alloy extrudes bar, it is characterized in that: the α of take is base mutually, composed of the following components by weight percentage: Cu:74%～77%, Al:7%～8.5%, Fe:2.5%～3%, Ni:1.1%～1.5%, Mn:0.9%～1.5%, Pb:0.25%～0.45%, Sn:0.1%～0.5%, surplus is Zn, other impurity elements≤0.5%.

As shown in Figure 1, a kind of high-strength wear-resistant complex complex brass alloy extrudes bar and manufacture craft thereof, comprises the following steps:

A. prepare burden: press alloy proportion batching 2500kg/ stove;

B. melting: first drop into the part copper fusing in smelting furnace, charcoal covers; Drop into manganese, flux covers; Drop into nickel, iron fusing; Dropping into remaining copper fusing stirs; The fusing of input zinc; After dropping into aluminium, lead, tin fusing, add old material; All, after fusing, stir aluminium alloy and make it even in 5～10 minutes, the throwing refining agent that then heats up carries out deslagging refining, the flame refining; It is qualified that sampling detects chemical composition, standing insulation; Standing insulation, skim slag after, converter flow to holding furnace;

C. continuous casting: carry out horizontal casting Φ 140 billets at holding furnace, casting speed is 2.5～4m/h, and " red ingot " draws casting, and sawing becomes spindle;

D. extruding: at Sloping Hearth fuel oil heating or mid freqency induction furnace, spindle is heated to 600～750 ℃, extrusion speed is 15～35mm/s, and extrusion ratio is 15～35, and hot extrusion must extrude pipe/rod, carries out hot aligning;

E. scale sawing.

The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification sheets of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present invention.

Claims (2)

1. a high-strength wear-resistant complex complex brass alloy extrudes bar, it is characterized in that: the α of take is base mutually, composed of the following components by weight percentage: Cu:74%～77%, Al:7%～8.5%, Fe:2.5%～3%, Ni:1.1%～1.5%, Mn:0.9%～1.5%, Pb:0.25%～0.45%, Sn:0.1%～0.5%, surplus is Zn, other impurity elements≤0.5%.

2. a high-strength wear-resistant complex complex brass alloy extrudes bar and manufacture craft thereof, comprises the following steps:

A. prepare burden: press alloy proportion batching 2500kg/ stove;

B. melting: first drop into the part copper fusing in smelting furnace, charcoal covers; Drop into manganese, flux covers; Drop into nickel, iron fusing; Dropping into remaining copper fusing stirs; The fusing of input zinc; After dropping into aluminium, lead, tin fusing, add old material; All, after fusing, stir aluminium alloy and make it even in 5～10 minutes, the throwing refining agent that then heats up carries out deslagging refining, the flame refining; It is qualified that sampling detects chemical composition, standing insulation; Standing insulation, skim slag after, converter flow to holding furnace;

C. continuous casting: carry out horizontal casting Φ 140 billets at holding furnace, casting speed is 2.5～4m/h, and " red ingot " draws casting, and sawing becomes spindle;

D. extruding: at Sloping Hearth fuel oil heating or mid freqency induction furnace, spindle is heated to 600～750 ℃, extrusion speed is 15～35mm/s, and extrusion ratio is 15～35, and hot extrusion must extrude pipe/rod, carries out hot aligning;

E. scale sawing.

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