CN103484713B - High-strength wear-resistant complex complex brass alloy extrudes bar and manufacture craft thereof - Google Patents

Abstract

The invention discloses a kind of high-strength wear-resistant complex complex brass alloy and extrude bar, it is characterized in that: with α phase for base, 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 element≤0.5%.Its manufacture craft comprises successively: a. prepares burden; B. melting; C. continuous casting; D. extrude; E. scale sawing.The present invention's advantage is compared with prior art: first, brass alloys are extruded ability that bar has possessed high strength, high-toughness wear-resistant, good wear mechanism, high media-resistant corrosion copper alloy; Secondly, ensure that polynary complex brass uniform composition is stablized; Efficiently solve the key problem in technology that it is easy to crack, quality control on the surface is difficult.

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 it is in the ascendant that domestic and international Novel copper alloy develops upsurge, and be born large quantities of high-performance, the copper alloy new variety of high technology content, new technology.

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

But it is also very few to the novel high-performance being base with α phase polynary complex brass research application both at home and abroad, mainly because such alloy industry production difficulty is large, especially former process founding technology is difficult, and the continuous casting working procedure that economic production in enormous quantities must adopt very easily produces implosion or appearance cracking.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 mechanism, excellent hot workability, also have more superelevation media-resistant corrosive power.Therefore develop such high performance alloys kind, there is wide market development prospect and major economic value.

Summary of the invention

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

Above-mentioned purpose of the present invention is realized by following technical scheme: a kind of high-strength wear-resistant complex complex brass alloy extrudes bar, it is characterized in that: with α phase for base, 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 element≤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: by alloy proportion batching 2500kg/ stove;

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

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

D. extrude: at Sloping Hearth fuel oil heating or mid freqency induction furnace, spindle is heated to 600 ~ 750 DEG C, 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 is compared with prior art:

First, determine suitable brass alloys kind chemical composition, form with α phase for base, by the interaction between alloying element, the wear-resisting phase of forming component complexity, uniform and stable distribution, extreme hardness on complex brass matrix, form reasonable Wear Resistance Mechanism, ensure material tool good wear performance.Make it the ability having possessed high strength, high-toughness wear-resistant, good wear mechanism, high media-resistant corrosion copper alloy, it extrudes state mechanical property: tensile strength: 700 ~ 750MPa, hardness HB:180 ~ 220, unit elongation >=8%.Can be used as the excellent substitute material of heavy price bronze, for high strength, high-toughness wear-resistant, media-resistant corrosion copper pipe rod market provide in enormous quantities, the high-performance novel material of low cost.

Secondly, solve the gordian technique that it is produced, adopt and be suitable for the large melting horizontal casting-Hot-extrusion produced, ensure that polynary complex brass uniform composition is stablized, have developed the melting horizontal continuous casting process of this alloy characteristic applicable, efficiently solve the key problem in technology that it is easy to crack, quality control on the surface is difficult, thus significantly improve production lumber recovery, make production technology maturing, be suitable for extensive industrialization.

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: with α phase for base, 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 element≤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: by alloy proportion batching 2500kg/ stove;

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

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

D. extrude: at Sloping Hearth fuel oil heating or mid freqency induction furnace, spindle is heated to 600 ~ 750 DEG C, 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 the scope of the claims of the present invention is limited; every utilize specification sheets of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (1)

1. a high-strength wear-resistant complex complex brass alloy extrudes bar, it is characterized in that: with α phase for base, 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 element≤0.5%; Described high-strength wear-resistant complex complex brass alloy extrudes the manufacture craft of bar, comprises the following steps:

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

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

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

D. extrude: at Sloping Hearth fuel oil heating or mid freqency induction furnace, spindle is heated to 600 ~ 750 DEG C, 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.