CN105908014A - Marine corrosion resistant copper alloy and production method thereof - Google Patents

Abstract

The invention relates to a marine corrosion resistant copper alloy. The marine corrosion resistant copper alloy is produced from the following components in percentage by mass: 66-75% of Cu, 0.1-0.8% of Al, 0.01-0.2% of Sn, 0.01-0.2% of Ni, 0.5-1.5% of Fe, 0.001-0.2% of Y, and the balance being Zn, wherein a smelted structure is single-phase alpha phase. The invention also provides a production method of the marine corrosion resistant copper alloy. The production method comprises the following steps of weighting reacting substances according to the mass percentage, wherein the Cu, the Al, the Sn, the Ni, the Fe and the Zn are a simple substance, and the Y is a Cu-Y intermediate alloy; adding the reacting substances into a reacting container, and smelting the added reacting substances under the temperature of 1000-1200 DEG C for 2-5 hours; and cooling the smelted reacting substances so as to obtain the marine corrosion resistant copper alloy. The marine corrosion resistant copper alloy disclosed by the invention is resistant to long-term marine corrosion, the content of added alloy elements is low, the processing performances of the alloy are good, the material formability is good, and the cost is low.

Description

A kind of copper alloy of seawater corrosion resistance and preparation method thereof

Technical field

The invention belongs to field of metallurgy, relate to a kind of alloy, the copper alloy of a kind of seawater corrosion resistance and Preparation method.

Background technology

One-ton brass has good mechanical property and decay resistance, especially has the most excellent decay resistance, right Sea water, fresh water all show great corrosion stability, have the title of " admirality brass ", thus be widely applied to Yu Haiyang cultivation, The fields such as chemical industry, electrician, electric power, navigation, underwater ordnance, heat exchanger, nuclear power station.But in one-ton brass, stanniferous amount is too much, meeting Drop low-alloyed plasticity, and alloy has stress-corrosion cracking to be inclined to.Very little, decay resistance is the poorest for stanniferous amount.In order to improve The anti-corrosion capability of one-ton brass, often with the addition of a small amount of arsenic (As) element in pyrite, such as traditional one-ton brass HSn70-1, but It is that arsenic has severe toxicity, environment structure is threatened, and its corrosion resisting property can not meet the demand of modern every profession and trade, how to choose conjunction Suitable Theil indices, adds suitable alloying element so that tin-brass alloy both seawater corrosion resistances, has certain mechanicalness simultaneously Stress corrosion fracture can be there is not during use, it is impossible to have the toxic element such as lead, arsenic etc., become in global range so that processing Heat subject.

Patent (publication number CN200580026908.9) provides the one-ton brass material of a kind of improvement, and composition range is 62- 91% Cu, 0.01-4% Sn, surplus is Zn, and adding alloying element has the combinations such as As, Sb, Mg, P combination or Mn, Si, Ni, Strictly limit such as impurity contents such as Fe simultaneously.For improving the corrosion resistance of pyrite, alloy have employed interpolation 0.02-0.25% mass The As of percentage ratio or other element, the most still continue to use the route adding As, and collocation is plus other of a relatively high yuan simultaneously Usually improve the corrosion resisting property of material, the problem not being fully solved poisonous As element, it is difficult to avoid in pyrite being smelted simultaneously Iron tramp content limit, add the cost of melting.

Patent application (application number 201410194408.7) proposes to use a kind of fishing net inhibited brass material, concrete composition For: Cu58-75%, Sn0.4-1.8%, Si0.2-0.5%, Bi0.2-0.5%, Pb≤0.004%, Fe≤0.003%, Cd≤ 0.0005%, surplus is Zn.For improving the corrosion resistance of pyrite, mainly take to add Bi and Sn element, in the strictest restriction pyrite The content of ferrum and lead improves the corrosion proof purpose of pyrite.But pyrite adds Bi and can increase the fragility of material so that material Processing characteristics deteriorates；Sn content height then can increase material cost, poor processability.

Summary of the invention

For above-mentioned technical problem of the prior art, the invention provides copper alloy and the system thereof of a kind of seawater corrosion resistance Preparation Method, described copper alloy of this seawater corrosion resistance and preparation method thereof to solve the anti-corrosion conjunction of sea water of the prior art Gold corrosion resistance is the best, the technical problem of processing difficulties.

The invention provides the copper alloy of a kind of seawater corrosion resistance, the mass percent of each component is as follows:

Cu 66-75%,

Al 0.1-0.8%,

Sn 0.01-0.2%,

Ni 0.01-0.2%,

Fe 0.5-1.5%,

Y 0.001-0.2%,

Zn surplus；The copper alloy obtained after melting is organized as single-phase α phase.

Further, the mass percent of each component of the copper alloy of described seawater corrosion resistance is as follows:

Cu 70%,

Al 0.6%,

Sn 0.1%,

Ni 0.1%,

Y 0.05%,

Fe 0.6%,

Zn surplus, the copper alloy obtained after melting is organized as single-phase α phase.

Further, in the copper alloy compositions of described seawater corrosion resistance, the mass percent of Ni and Sn meets following relation and is Optimal: [Sn]/[Ni]=0.90～1.2.

Present invention also offers the preparation method of the copper alloy of above-mentioned a kind of seawater corrosion resistance, comprise the steps:

1) weighing each reacting substance according to mass percent, wherein Cu, Al, Sn, Ni, Fe, Zn are simple substance, and Y is in the middle of Cu-Y Alloy；

2) above-mentioned material is joined in reaction vessel, use the temperature melting 2 ~ 5 hours of 1000 ~ 1200 DEG C, after cooling i.e. Copper alloy for seawater corrosion resistance.

The present invention is designed by microalloying, i.e. adds the Y of trace, and Sn, Ni content is carried out suitable cooperation, is reducing In alloy while Sn content, add a small amount of Al and control is organized as single-phase α phase, reach to improve alloy seawater corrosion resistance Purpose；Simultaneously because the alloying element content added is few, the good processability of alloy, do not result in materials processing difficulty；Right In alloy, inevitable impurity F e utilizes, and adds the corrosion resistance of alloy on the contrary；The alloying element selected is low cost Al, Fe, Ni etc., cost is the lowest；Without poisonous Element Lead, arsenic in alloy, environment will not be brought pollution.The present invention both improved The corrosion resistance of brass material, does not damage other performance of pyrite simultaneously.

The present invention compares with prior art, and its technological progress is significant.The present invention is the applicable ocean of a kind of low cost The inhibited brass material of engineering, is especially adapted for use in sea water and encloses and grow fishing net use, by Alloying Design, both improve alloy Resistance to corrosion seawater, has intensity height, an advantage that good processability, sea water resistance wash away simultaneously.

Detailed description of the invention

Below in conjunction with specific embodiment, the present invention is further explained explanation, it will help reason further to the present invention Solving, protection scope of the present invention is not limited to the examples, and protection scope of the present invention is defined by the claims.

Embodiment 1

Dispensing: seawater corrosion resistance and the Cu alloy material washed away, respectively composition and the mass percent control thereof that its component prescription comprises System is at Cu70%, Al 0.6%, Sn 0.1%, Ni 0.1%, Y 0.05%, Fe 0.6%, and surplus is Zn.Cu, Al, Sn used during melting , Ni, Fe, Zn be simple substance simple metal, Y with Cu-10%Y intermediate alloy add.Obtain after melting is organized as α phase.Prepare Its intensity of brass alloy material more than 450MPa, hardness HB 110, elongation percentage is more than 20%, in the seawater corrosion rate be 8 μm/ a。

Embodiment 2

Dispensing: seawater corrosion resistance and the Cu alloy material washed away, respectively composition and the mass percent control thereof that its component prescription comprises System is at Cu66%, Al 0.1%, Sn 0.01%, Ni 0.01%, Y 0.2%, Fe 0.6%, and surplus is Zn.Cu used during melting, Al, Sn, Ni, Fe, Zn are simple substance simple metal, and Y Cu-10%Y intermediate alloy adds.Obtain after melting is organized as α phase.It is prepared into To its intensity of brass alloy material more than 400MPa, hardness HB 110, elongation percentage is more than 20%, and corrosion rate is in the seawater 15μm/a。

Embodiment 3

Dispensing: seawater corrosion resistance and the Cu alloy material washed away, respectively composition and the mass percent control thereof that its component prescription comprises System is at Cu75%, Al 0.8%, Sn 0.01%, Ni 0.01%, Y 0.1%, Fe 1%, and surplus is Zn.Cu, Al, Sn used during melting , Ni, Fe, Zn be simple substance simple metal, Y with Cu-10%Y intermediate alloy add.Obtain after melting is organized as α phase.Prepare Its intensity of brass alloy material more than 450MPa, hardness HB 120, elongation percentage is more than 20%, in the seawater corrosion rate be 12 μm/ a。

Embodiment 4

Dispensing: seawater corrosion resistance and the Cu alloy material washed away, respectively composition and the mass percent control thereof that its component prescription comprises System is 1.5% at Cu70%, Al 0.4%, Sn 0.1%, Ni 0.12%, Y 0.05%, Fe, and surplus is Zn.Cu used during melting, Al, Sn, Ni, Fe, Zn use simple substance simple metal, and Y Cu-15%Y intermediate alloy adds.Obtain after melting is organized as α phase.Preparation Its intensity of the brass alloy material obtained exceedes for 450MPa, and hardness is HB 120, and elongation percentage is more than 20%, corrodes in the seawater Speed is 12 μm/a.

Claims (4)

1. the copper alloy of a seawater corrosion resistance, it is characterised in that the mass percent of each component is as follows:

Cu 66-75%,

Al 0.1-0.8%,

Sn 0.01-0.2%,

Ni 0.01-0.2%,

Fe 0.5-1.5%,

Y 0.001-0.2%,

Zn surplus；The copper alloy obtained after melting is organized as single-phase α phase.

The copper alloy of a kind of seawater corrosion resistance the most according to claim 1, it is characterised in that the mass percent of each component As follows:

Cu 70%,

Al 0.6%,

Sn 0.1%,

Ni 0.1%,

Y 0.05%,

Fe 0.6%,

Zn surplus；The copper alloy obtained after melting is organized as single-phase α phase.

The copper alloy of a kind of seawater corrosion resistance the most according to claim 1 and 2, it is characterised in that: each component and quality thereof Percentage ratio meets following relation: [Sn]/[Ni]=0.90～1.2.

4. the preparation method of the copper alloy of a kind of seawater corrosion resistance described in claim 1, it is characterised in that comprise the steps:

1) weighing each reacting substance according to mass percent, wherein Cu, Al, Sn, Ni, Fe, Zn are simple substance, and Y is to close in the middle of Cu-Y Gold；

2) above-mentioned material is joined in reaction vessel, use the temperature melting 2 ~ 5 hours of 1000 ~ 1200 DEG C, after cooling i.e. Copper alloy for seawater corrosion resistance.