CN102888524A

CN102888524A - Copper-strontium-phosphorus alloy modifier for aluminum-silicon alloy and production technique thereof

Info

Publication number: CN102888524A
Application number: CN2012104096663A
Authority: CN
Inventors: 张绪平; 张文; 张霄霄
Original assignee: China University of Mining and Technology CUMT
Current assignee: China University of Mining and Technology CUMT
Priority date: 2012-10-24
Filing date: 2012-10-24
Publication date: 2013-01-23
Anticipated expiration: 2032-10-24
Also published as: CN102888524B

Abstract

The invention relates to a copper-strontium-phosphorus alloy modifier for aluminum-silicon alloy and a production technique thereof, belonging to alloy metal materials and production techniques thereof. The copper-strontium-phosphorus alloy modifier is composed of the following elements in percentage by weight: 60-80% of copper, 6-11% of phosphorus and 10-20% of strontium. The production technique comprises the following steps: proportionally preparing copper-phosphorus interalloy, commercially pure copper and commercially pure strontium; melting the copper-phosphorus interalloy and commercially pure copper at 1100-1300 DEG C in a smelting furnace; adding weighed pure strontium in an inert gas protective atmosphere; quickly stirring until the reaction is complete; and directly casting into an ingot or wire, thereby obtaining the copper-strontium-phosphorus modifier. The alloy has the advantages of low melting point and high strontium content, reduces the quantity of gas carried by the added long-acting modifier, and enhances the quality of the casting product; and besides, compared with the existing refined modifier subjected to two separate operation treatments, the treatment operation of the invention saves both time and labor.

Description

A kind of copper-strontium of aluminum silicon alloy-phosphorus alloy alterant and production technique thereof

Technical field

The present invention relates to the copper-strontium of a kind of alloy metal material and production technique, particularly a kind of aluminum silicon alloy-phosphorus alloy alterant and production technique thereof.

Background technology

Aluminum silicon alloy has the characteristics such as lightweight, high-strength, high abrasion, high heat resistance and low bulk, so it is widely used in the fields such as automobile, space flight.But for a long time, the subject matter of puzzlement and the application of restriction aluminum silicon alloy is: fragility is large, and machinability is poor.Because being formed by thick tabular primary silicon and the Eutectic Silicon in Al-Si Cast Alloys of bodkin shape of aluminum silicon alloy.Thick primary silicon can improve Wear Resistance as the hard point, but hard and crisp because of it, isolates matrix serious, therefore the mechanical property of alloy is reduced, its poor processability simultaneously adds the man-hour cutter easy to wear, poor surface smoothness.Therefore, how refinement primary silicon and Eutectic Silicon in Al-Si Cast Alloys are put forward heavy alloyed mechanical property, and rotten theoretical perfect development and application thereof have great importance to aluminum silicon alloy.

At present, prior art goes bad with aluminium-phosphorus alloy first in the rotten treatment process of primary silicon in the aluminum silicon alloy and Eutectic Silicon in Al-Si Cast Alloys, and then with the processing of going bad of aluminium-strontium master alloy.Rotten at twice operation, time-consuming.

Summary of the invention:

The objective of the invention is to provide a kind of low melting point, strontium content high, the copper-strontium of the rotten aluminum silicon alloy that carries out simultaneously of primary silicon and Eutectic Silicon in Al-Si Cast Alloys-phosphorus alloy alterant and production technique thereof.

The object of the present invention is achieved like this: the present invention includes the production technique of copper-phosphorus-strontium alterant and alterant,

This alterant is copper-phosphorus-strontium alterant, and weight percent is: copper 60%-80%; Phosphorus 6%-10%; Strontium 10%-20%.

The production technique of copper-phosphorus of the present invention-strontium alloy alterant may further comprise the steps:

(1) at first takes by weighing raw material by the mass percent of copper-phosphorus master alloy 60%-80%, industrial pure copper 10%-20%, strontium 10%-20%; Wherein, the phosphorus content of copper-phosphorus master alloy is 14%;

(2) in smelting furnace, fine copper and copper-phosphorus master alloy are melted to 1150 ℃-1300 ℃, under protection of inert gas, add the pure strontium taken by weighing, be stirred to rapidly and react completely;

(3) direct casting ingot-forming or be prepared into wire rod is made into copper-strontium-phosphor alterative.

Beneficial effect, owing to having adopted such scheme, copper-phosphorus-three kinds of materials of strontium carry out becoming copper-phosphorus-strontium alterant behind the high melt, wherein contain phosphorus, because phosphorus is poisonous, adds and enter so the phosphorus that adds is form with copper-phosphorus alloy, fusing point is low, strontium content is high, reduces the gas volume of bringing into because adding long-acting alterant, improves casting product quality; Primary silicon and Eutectic Silicon in Al-Si Cast Alloys can go bad simultaneously, with the metamorphic facies ratio of opening the operation processing in existing twice minute, time and labour saving during processing operation.

Embodiment:

Embodiment 1:

(1) at first takes by weighing raw material by the mass percent of copper-phosphorus alloy 60%, industrial pure copper 20%, strontium 20%; (2) in smelting furnace, fine copper and copper-phosphorus master alloy are melted to 1250 ℃, under protection of inert gas, add the strontium taken by weighing, be stirred to rapidly and react completely; Wherein, the phosphorus content of copper-phosphorus master alloy is 14%, is the outsourcing product; (3) direct casting ingot-forming or be prepared into wire rod.

The alterant of the copper-phosphorus that obtains according to said ratio-strontium master alloy, its chemical composition mass percent is: phosphorus 6%, strontium 18%, all the other are copper.

In use, first with copper-phosphorus-strontium alloy alterant preheating, then after the aluminum silicon alloy fusing, temperature is raised to 780 ℃-830 ℃, preheated alterant is added in the solution of aluminum silicon alloy, add-on is 0.3% of aluminium silicon weight, after dissolving in 3-5 minute, gentle agitation was skimmed in static 5 minutes, static 4 minutes again, cast.

Embodiment 2:

(1) at first takes by weighing raw material by the mass percent of copper-phosphorus alloy 70%, industrial pure copper 15%, strontium 15%; (2) in smelting furnace, fine copper and copper-phosphorus master alloy are melted to 1250 ℃, under protection of inert gas, add the strontium taken by weighing, be stirred to rapidly and react completely; Wherein, the phosphorus content of copper-phosphorus master alloy is 14%, is the outsourcing product; (3) direct casting ingot-forming or be prepared into wire rod.

The alterant of the copper-phosphorus that obtains according to said ratio-strontium master alloy, its chemical composition (mass percent) is:

Phosphorus 8%, strontium 13%, all the other are copper.

Embodiment 3:

(1) at first takes by weighing raw material by the mass percent of copper-phosphorus alloy 80%, industrial pure copper 10%, strontium 10%; (2) in smelting furnace, fine copper and copper-phosphorus master alloy are melted to 1250 ℃, under protection of inert gas, add the strontium taken by weighing, be stirred to rapidly and react completely; Wherein, the phosphorus content of copper-phosphorus master alloy is 14%, is the outsourcing product; (3) direct casting ingot-forming or be prepared into wire rod.

Phosphorus 10%, strontium 8%, all the other are copper.

Claims

1. copper-the strontium of an aluminum silicon alloy-phosphorus alloy alterant is characterized in that, the weight percent of this master alloy is: copper 60%-80%; Phosphorus 6%-10%; Strontium 20%-50%.

2. the production technique of the copper-strontium of an aluminum silicon alloy-phosphorus alloy alterant is characterized in that: may further comprise the steps:

(1) at first presses copper-phosphorus master alloy 60%-80%, industrial pure copper 10%-20%; The mass percent of strontium 20%-30% takes by weighing raw material; Wherein, the phosphorus content of copper-phosphorus master alloy is 14%;

(2) in smelting furnace, copper-phosphorus master alloy and industrial pure copper are melted to 1100 ℃-1300 ℃, under protection of inert gas, add again the pure strontium taken by weighing, be stirred to rapidly and react completely;