CN101457308A - Method for preparing phosphor-copper intermediate alloy - Google Patents

Abstract

The invention discloses a method for preparing phosphor copper intermediate alloy, characterized by the following steps: using a composite ceramic tundish with high heat and shock resistance to superpose 10-15wt% of red phosphorus in a manner that phosphor and plant ash are isolated from each other layer by layer, wherein each layer is compacted by a hammer and the top layer is covered with carbonized rough rice; a plurality of holes are arranged downwards at the middle part of the ceramic tundish for passage of high temperature copper liquid; arranging 85-90 wt% of industrial pure copper into an medium frequency induction furnace step by step and after the solid copper melts down, raising the temperature to 1200 to 1250 DEG C, then pouring the high temperature copper liquid into the ceramic tundish slowly to infiltrate the copper liquid into the phosphor layer from top to bottom via the holes in the tundish, stirring with a graphite bar for 7 to 10 minutes, keeping temperature of the alloy liquid in the tundish above the freezing point and afterwards pouring the alloy liquid into a steel die for cooling and freezing formation, sampling and examining contents of chemical compositions and impurities, and weighting and packaging qualified products.

Description

A kind of preparation method of phosphor bronze alloy

Technical field

The present invention relates to a kind of preparation method of phosphor bronze alloy, belong to the preparation field of alloy material.

Background technology

Phosphor bronze alloy is a deoxidation raw material commonly used in the copper and copper alloy industry, also is the important interpolation element of many copper alloy compositions.Present IT industry CuFeP blaster fuse frame material commonly used for example wherein contains the phosphoric of suitable proportion, so the phosphor copper indispensable important interpolation raw material that also is high-end alloy material.The present main rainy kind of method of domestic production phosphor copper: " semiclosed hybrid system " and " being blended into method " (useful trial " casting " 2005No9P925 of See phosphor bronze alloy melting technology).These two kinds of method De You Dian are equipment used letter Single, and are easy to operate.But have the following disadvantages: the firstth, the loss of phosphorus is big, and the recovery rate of phosphorus only reaches 60～80%; The secondth, phosphor copper is second-rate, the iron in the alloy, and sila prime element content is higher, is not suitable for the deoxidation that height is led copper and alloy, and the high-end alloy of also uncomfortable cooperation adds the use of element; The 3rd is that Rong Lian Time environmental pollution is bigger, main comes to come pollution to air to the burning of phosphorus and the Tapes of sand mo(u)ld dust institute.

Summary of the invention

The objective of the invention is to provide a kind of preparation method of phosphor bronze alloy at the deficiencies in the prior art, be characterized in going into Against on the method De Ji Foundation former, adopt the composite ceramics tundish of high-heat resistance shock resistant, build the phosphorus method with layering, and annotate to reduce alloy impurity content with punching block Pouring, phosphorus Burn decreases less, the requirement that the low phosphor copper raw material ， Yi Full foot of environmental pollution is produced high conduction, high heat-conducting copper and alloy thereof.

Purpose of the present invention is realized that by following technical measures wherein said raw material umber is weight percentage except that specified otherwise.

The preparation method of phosphor bronze alloy

The starting raw material of phosphor bronze alloy is made up of following weight percentage:

P 10～15

Cu 85～90

And by the preparation of following processing step and processing parameter:

(1) composite ceramics tundish: consider that tundish repeatedly bears the impact suddenly of high temperature copper water, cause the thermal shocking fatigure failure easily, the present invention utilizes high-heat resistance shock resistant composite ceramics tundish, excellent thermal insulation performance when having guaranteed the Pouring bag, repeatedly use and do not damage, make alloy avoid the pollution of impurity element with standing erect;

(2) multilayer is built the phosphorus method: because phosphorus belongs to inflammable and explosive element, therefore build in ceramic tundish and reduce phosphorus in the phosphorus process as far as possible and contact with empty Gas.The present invention adopts 10～15% red phosphorus one deck phosphorus one deck plant ash isolate and builds up, and every layer compresses with hammer, and the superiors are topped with charing paddy.Every layer of institute exerts pressure and wants appropriateness, and pressure is too small, and phosphorus is because of oxidation Pen Splash loss; Pressure is excessive, and then copper liquid is difficult to penetrate down, is difficult for forming phosphor copper.After each layer built, offer a plurality of apertures downwards at ceramic tundish middle part, for the high-temperature copper liquid percolation.

(3) the molten copper of medium-frequency induction furnace: 85～90% industrial pure coppers are progressively put into medium-frequency induction furnace, after treating that solid-state copper melts clearly, be warming up to 1200～1250 ℃, slowly pour the high temperature fine copper into ceramic tundish then, copper liquid infiltrates the phosphorus layer from top to bottom by the aperture in wrapping, because empty Gas rareness, many Number phosphorus fuses in the copper liquid, reduced phosphorus and produced De Pen Splash phenomenon, so entire reaction is comparatively tranquil because of oxidation.Stir with graphite rod at last, make alloy liquid more even.The entire operation time is 7～10 minutes, keeps the alloy liquid temp in the bag must not reduce to Ning Gu Dian.

(4) punching block Pouring annotates:

Punching block is coated with lubricant, Jiao is mixed uniform alloy liquid pour in the water-cooled punching block of automated cycle, and alloy liquid quick cooling is solidified.

(5) demoulding smashes:

Treat that alloy pig is chilled to below 100 ℃, carry out the demoulding, and become fritter, inspection by sampling Chemical Composition and foreign matter content, the quality qualified product packing of being weighed with crusher or cobbing.

The performance test of phosphor bronze alloy is detailed to be shown in Table 2, and the result shows that the recovery rate of phosphorus is higher, and impurity content is lower.

Phosphor bronze alloy is used for the deoxidation raw material of high conduction, high heat-conducting copper and alloy or adds element.

The present invention has following advantage:

1. adopt high-heat resistance shock resistant composite ceramics tundish, liner tundish than box hat commonly used at present has higher heat-insulating property, the You Dian such as pollution of high temperature resistance thermal shock performance and reduction alloy, be between standing erect of liquid state thereby prolong alloy, prolong the work-ing life of tundish and the purity of lifting alloy.

2. the tundish multilayer is built the phosphorus method and is built the phosphorus method than individual layer at present commonly used and have higher processing safety, reduces the splash of phosphorus under high temperature copper impacts, and improves the recovery rate of phosphorus simultaneously.Reduce the pollution of Vanadium Pentoxide in FLAKES to air.

3. punching block Pouring notes method is annotated than sand mo(u)ld Pouring commonly used at present and is had more convenient operation, more cleans De You Dian, improves the quality of products, and can use repeatedly, reduces production costs.

4. the at present commercial product foreign matter content of the foreign matter content of the phosphor copper produced of the present invention is low, helps height and leads the deoxidation raw material of copper and alloy thereof or add on the element and use.

5. do not produce the splash of phosphorus in process of production, more do not have explosion phenomenon and produce, do not have big smog yet and emerge, this process safety, environmental protection is good.

Embodiment

Below by embodiment the present invention is carried out concrete description; be necessary to be pointed out that at this present embodiment only is used for the present invention is further specified; can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field can make some nonessential improvement and adjustment according to the content of the invention described above.

Embodiment

1, the preparation method's of phosphor bronze alloy embodiment is as shown in table 1.

2, the phosphor bronze alloy chemical composition analysis is as shown in table 2.

The embodiment of table 1 phosphor bronze alloy preparation

Embodiment	Red phosphorus (kg)	Copper (kg)	Total charging capacity (kg)	Copper liquid casting ladle temperature ℃	Time (min)
						1	10	90	100	1200	10
2	12	88	100	1250	7
						3	15	85	100	1220	8

Table 2 phosphor bronze alloy Chemical Composition is analyzed (wt%)

Embodiment	P	Fe	Si	Cu
					1	9.6	0.006	0.04	Surplus
2	11.5	0.005	0.05	Surplus
					3	14.5	0.007	0.06	Surplus

Claims (1)

1, a kind of preparation method of phosphor bronze alloy is characterized in that the starting raw material of this phosphor bronze alloy is made up of following weight percentage:

P 10～15

Cu 85～90

And by the preparation of following processing step and processing parameter:

(1) composite ceramics tundish: select the composite ceramics tundish of high-heat resistance shock resistant for use, excellent thermal insulation performance when having guaranteed the Pouring bag is repeatedly used and is not damaged, and makes alloy avoid the pollution of impurity element with standing erect;

(2) multilayer is built the phosphorus method: with red phosphorus 10～15%, adopt one deck phosphorus one deck plant ash to isolate and build up, every layer compresses with hammer, and the superiors are topped with charing paddy, offer a plurality of apertures downwards at ceramic tundish middle part, for the high-temperature copper liquid percolation;

(3) the molten copper of medium-frequency induction furnace: with weight ratio is that 85～90% industrial pure coppers are progressively put into medium-frequency induction furnace, after treating that solid-state copper melts clearly, be warming up to 1200～1250 ℃, slowly pour high-temperature copper liquid into ceramic tundish, copper liquid infiltrates the phosphorus layer from top to bottom by the aperture in wrapping, and stirs with graphite rod again, makes alloy more even, entire operation reaches 7～10 minutes, keeps the temperature of the alloy liquid in the bag must not reduce to Ning Gu Dian;

(4) punching block Pouring annotates:

Punching block is coated with lubricant, Jiao is mixed uniform alloy liquid pour in the water-cooled punching block of automated cycle, and alloy liquid quick cooling is solidified;

(5) demoulding smashes:

Treat that alloy pig is chilled to below 100 ℃, carry out the demoulding, and become fritter, inspection by sampling Chemical Composition and foreign matter content, the quality qualified product packing of being weighed with crusher or cobbing.