CN1289656A - Squeeze casting technology for copper tuyere or monkey sleeve - Google Patents

Abstract

A squeeze casting technology for manufacturing tuyere or monkey sleeve of copper includes such technological steps as preheating moulds at 150-350 deg.C, smelting copper, spraying paint onto moulds, pouring at 1200-1280 deg.C, closing moulds, pressurizing at 50-250 MPa with speed of 2-60 mm/s for 5-50 seconds, holding pressure, releasing, and demoulding. Its advantages are high density and strength, long service life and high productivity.

Description

Fine copper wind, cinder notch cover Extrution casting technique

The present invention relates to a kind of Extrution casting technique, specifically a kind of Extrution casting technique of fine copper product.

Extrusion casint is called liquid forging again, is the cleanup forming technique of a kind of advanced person between casting and forging processing.In recent years, at home and abroad be used widely.Its extruding kind mainly contains alloy products such as aluminium that motorcycle, automobile aluminium wheel, aluminium piston and other shape more complicated, inherent quality have relatively high expectations, zinc, and the product of material as fine copper also is difficult to realize by extrusion casint.

For a long time, blast furnace wind, cinder notch cover are because of its particular performances requirement, usually make by the fine copper metal, its technology is that machined forms after the conventional cast moulding, because casting density is low, physical property is poor, uses under the blast furnace adverse circumstances, its life-span is very short, needing often stops production changes, and has influenced the production efficiency of blast furnace greatly.

The objective of the invention is squeeze casting technology is applied in the product processing that fine copper is a material, make the forming technology of blast furnace wind, cinder notch cover become Extrution casting technique by conventional cast, to improve the inherent organization factors of product, improve the quality of products, increase the service life.

To the effect that of the present invention: with the processing that is shaped of fine copper wind, cinder notch cover, its concrete technology is: at first extrusion die is given heat, simultaneously fine copper is carried out melting with the method for extrusion casint; To the mould sprayed coating, pour into a mould before the cast, back matched moulds is exerted pressure again, and depanning behind the pressure of maintenance certain hour is characterized in that:

1, mould gives hot temperature and is controlled between 150 ℃-350 ℃;

2, fusion fine copper temperature is brought up to 1280-1320 ℃, be pressed into copper liquid, carry out deoxidation and purify molten metal with P-Cu alloy and RE (ce)-Cu alloy;

3, be cast for quantitative cast, pouring temperature is 1200-1280 ℃;

4, exert pressure the time started: 5-30S;

5, speed: the 2-60mm/s (look workpiece size and preferred) that exerts pressure;

6, exert pressure: specific pressure is 50-250Mpa (it is different and preferred to look workpiece);

7, pressure hold time: 5-50S.

Wind after the employing extrusion casint, cinder notch cover parts, performance indications such as its density, tensile strength, percentage elongation, thermal conductivity, hardness all are improved largely, and facts have proved to improve 2-4 doubly than conventional cast Forming Workpiece its service life.Improve the wind cinder notch greatly and be enclosed within behaviour in service on the blast furnace.

Accompanying drawing 1 is an extrusion casint fine copper wind cinder notch cover process chart;

1-1 gives heat to mould among the figure; The 1-2 fine copper carries out melting; 2 is the mould sprayed coating; 3 are cast; 4 is matched moulds; 5 for exerting pressure; 6 are pressurize; 7 are release; 8 are depanning;

Be 1260M below ³The specific embodiment of tuyere cover of blast furnace front end component: its workpiece contour dimension is φ 290 * 270mm, wall thickness 14mm.

This casting die is the direct press type structure, earlier mould is given heat (1-1), and giving hot temperature is 150-250 ℃; Simultaneously, the fine copper metal is carried out melting, when copper liquid temperature rises to 1250-1320 ℃, be pressed into solution, carry out comprehensive deoxidation, purify molten metal (1-2) with P-Cu alloy and RE (ce)-Cu alloy; After above-mentioned two-step is finished, before preparing to pour into a mould, mould is carried out sprayed coating (2), coating is SQ101 extrusion casint releasing agent; After quantitatively pour into a mould, temperature is 1230-1280 ℃ (3); At once matched moulds (4) after the cast is exerted pressure the time started: 5-10S; After begin to exert pressure (5); Speed: 30-40mm/s exerts pressure; Its pressure size is calculated and is drawn by specific pressure 200-235MPa and workpiece projected area, the 5-8S that then keep-ups pressure (6); Back release (7); Workpiece (8) is taken out in die sinking.

Claims (1)

1, a kind of wind cinder notch cover Extrution casting technique at first gives heat to mould, simultaneously fine copper is carried out melting, to the mould sprayed coating, pours into a mould before the cast again, and back matched moulds is exerted pressure, depanning behind the maintenance certain hour pressure, and characteristics of the present invention are:

(1), mould gives hot temperature and is controlled between 150 ℃-350 ℃;

(2), fusion fine copper temperature brought up to 1280-1320 ℃ be pressed into copper liquid with P-Cu alloy and RE (ce)-Cu alloy, carry out deoxidation and purify molten metal.

(3), be cast for quantitative cast, pouring temperature is 1200-1280 ℃;

(4), exert pressure the time started: 5-30S;

(5), speed: the 2-60mm/s (look workpiece size and preferred) that exerts pressure;

(6), exert pressure: specific pressure is 50-250Mpa (it is different and preferred to look workpiece);

(7), pressure hold time: 5-50S.

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