CN104032178A

CN104032178A - High-temperature-resistant copper alloy material and preparation method thereof

Info

Publication number: CN104032178A
Application number: CN201410197407.8A
Authority: CN
Inventors: 陈大军
Original assignee: BENGBU HONGWEI FILTER Co Ltd
Current assignee: BENGBU HONGWEI FILTER Co Ltd
Priority date: 2014-05-12
Filing date: 2014-05-12
Publication date: 2014-09-10

Abstract

A high-temperature-resistant copper alloy material comprises the chemical elements in percent by mass: 0.3-0.5% of Pb, 1.3-1.5% of Si, 6.3-6.5% of Mn, 1.1-1.3% of Ni, 0.16-0.18% of Sn, 2.1-2.3% of Cr, 0.1-0.2% of Hf, 1.16-1.27% of Nb, and the balance Cu. By adding Ni, Mn, Nb, Hf, Cr and other elements into the alloy, the copper alloy is improved in hardness and wear resistance, improved in melting point and not reduced in electric conductivity; by adding Sn, the alloy is small in friction coefficient, resistant to corrosion and prolonged in service life; and the copper alloy is suitable for preparing bearings, worm wheels, gears, sliding shoes, port plates and other important parts. An employed refining agent is used for casting production, is capable of reducing the porosity degree of a casting by 1-2 degree and enabling the oxide inclusions to be around second grade, and helps to obviously improve the yield.

Description

A kind of high temperature resistant Cu alloy material and preparation method thereof

Technical field

The manufacture field that the present invention relates to metal alloy compositions, relates in particular to a kind of high temperature resistant Cu alloy material and preparation method thereof.

Background technology

Copper is because of its good electroconductibility, plasticity-, and erosion resistance, applies very extensive.In copper alloy, add Lv ﹑ Nie ﹑ Meng ﹑ Xi ﹑ Gui ﹑ lead and other elements, can improve the performance of copper, for different places.Still there are some problems in the existing copper alloy of China at present, and as alloy contains a large amount of impurity elements, high temperature fatigue is poor, hot strength is low; Hardness is low, wears no resistance, frictional coefficient is large, and work-ing life is short; Poorly conductive, waste electric energy; Bending machining performance is poor, easily fractures; Quality weight, constructional difficulties; Can't meet market demands.

Summary of the invention

The object of the present invention is to provide a kind of high temperature resistant Cu alloy material and preparation method thereof, this Cu alloy material has high rigidity, frictional coefficient is little, wear resistance good, resistant to elevated temperatures advantage.

Technical scheme of the present invention is as follows:

A kind of high temperature resistant Cu alloy material, is characterized in that: chemical element composition and mass percent thereof that it contains are: plumbous 0.3-0.5, silicon 1.3-1.5, manganese 6.3-6.5, nickel 1.1-1.3, tin 0.16-0.18, chromium 2.1-2.3, Hf0.1-0.2, Nb1.16-1.27, surplus are copper.

The production method of described high temperature resistant Cu alloy material, is characterized in that:

(1), preparing fine copper and copper scrap originates as copper matrix in 1:1-2 ratio, fine copper is added to drop in stove and melt, carry out removing impurities matter, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add copper scrap fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;

(2) in alloying process, to the lot sequence that drops into alloying element in stove be: (1) silicon, chromium, Nb; (2) manganese, tin; (3) other remaining components; The each batch of timed interval of dropping into element is 22-25 minute, after feeding intake, stirs.

Described casting postheat treatment is: be first warming up to 250-260 DEG C by room temperature with 240-250 DEG C/h of speed, and insulation 50-60 minute, then be warming up to 560-570 DEG C with 240-250 DEG C/h of speed, insulation 1-2 hour; Be cooled to 100-120 DEG C with 250-260 DEG C/h of speed again, insulation 1-2 hour; Be warming up to 360-380 DEG C with 240-250 DEG C/h of speed again, insulation 1-2 hour; Be cooled to 100-120 DEG C with 150-160 DEG C/h of speed again, insulation 1-2 hour; Be warming up to 310-330 DEG C with 200-210 DEG C/h of speed again, insulation 1.5-2 hour, takes out air cooling and get final product.

Described refining agent is made up of the raw material of following weight part: silica 1 5-20, rhombspar 3-5, bitter water chestnut soil 4-8, clay 30-35, titanium dioxide 2-3, fluorite 6-8, jade powder 3-4, montmorillonite 1-2, trees ashes 1-2, Na ₂tiF ₆8-10, Sodium Silicofluoride 3-4; Its preparation method is that silicon-dioxide, rhombspar, bitter water chestnut soil, clay, titanium dioxide, fluorite, jade powder, montmorillonite, trees ashes are mixed, be heated to 2600-3000 DEG C, stir 1-2 hour, after cooling, be added in the hydrochloric acid soln of 10-15%, soak 1-2 hour, filter, filter residue is cleaned with clear water repeatedly, dries, and merges and mixes and get final product with other composition.

Beneficial effect of the present invention

Alloy of the present invention, by adding the elements such as nickel, manganese, Nb, Hf, chromium, has improved hardness and the wear resisting property of copper alloy, has improved fusing point, and conductivity does not reduce simultaneously; By adding tin, make alloy friction little, corrosion-resistant, extend work-ing life; By reasonable control casting post-processing temperature, use copper scrap as raw material, make core hardness and surface hardness basically identical, alloy quality homogeneous, is difficult for cracking.Copper alloy of the present invention is applicable to make the strength members such as Zhou Cheng ﹑ Wo Lun ﹑ gear, piston shoes and valve plate.Refining agent of the present invention, for Foundry Production, can make the degree of porosity in foundry goods reduce 1-2 degree, and oxide inclusion, 2 grades of left and right, obviously improves yield rate.

Embodiment

A kind of high temperature resistant Cu alloy material, chemical element composition and mass percent thereof that it contains are: plumbous 0.3-0.5, silicon 1.3-1.5, manganese 6.3-6.5, nickel 1.1-1.3, tin 0.16-0.18, chromium 2.1-2.3, Hf0.1-0.2, Nb1.16-1.27, surplus are copper.

The production method of described high temperature resistant Cu alloy material is as follows:

(1), preparing fine copper and copper scrap originates as copper matrix in 1:1.5 ratio, fine copper is added to drop in stove and melt, carry out removing impurities matter, deoxidation, employing refining agent initial refining, add alloying constituent and carry out alloying, then add copper scrap fusing, add refining agent secondary refining, detection and adjust chemical element component content to qualified, casting, casting postheat treatment etc.;

(2) in alloying process, to the lot sequence that drops into alloying element in stove be: (1) silicon, chromium, Nb; (2) manganese, tin; (3) other remaining components; The each batch of timed interval of dropping into element is 24 minutes, after feeding intake, stirs.

Described casting postheat treatment is: be first warming up to 255 DEG C by room temperature with 245 DEG C/h of speed, be incubated 55 minutes, then be warming up to 565 DEG C with 245 DEG C/h of speed, be incubated 1.5 hours; Be cooled to 105 DEG C with 255 DEG C/h of speed again, be incubated 1.5 hours; Be warming up to 370 DEG C with 245 DEG C/h of speed again, be incubated 1.5 hours; Be cooled to 100-120 DEG C with 155 DEG C/h of speed again, be incubated 1.5 hours; Be warming up to 320 DEG C with 205 DEG C/h of speed again, be incubated 1.7 hours, take out air cooling and get final product.

Described refining agent by following weight part (kilogram) raw material make: silica 15, rhombspar 3, bitter water chestnut soil 4, clay 30, titanium dioxide 2, fluorite 8, jade powder 4, montmorillonite 1, trees ashes 2, Na ₂tiF ₆8, Sodium Silicofluoride 3; Its preparation method is that silicon-dioxide, rhombspar, bitter water chestnut soil, clay, titanium dioxide, fluorite, jade powder, montmorillonite, trees ashes are mixed, be heated to 2600-3000 DEG C, stir 1-2 hour, after cooling, be added in the hydrochloric acid soln of 10-15%, soak 1-2 hour, filter, filter residue is cleaned with clear water repeatedly, dries, and merges and mixes and get final product with other composition.

The present embodiment is high temperature resistant Cu alloy material, tensile strength б b is 560Mpa, yield strength 500MPa, hardness value HB is 140, electric conductivity %IACS60,20 DEG C of unit elongation 13%, 600 DEG C of softening temperatures.

Claims

1. a high temperature resistant Cu alloy material, is characterized in that: chemical element composition and mass percent thereof that it contains are: plumbous 0.3-0.5, silicon 1.3-1.5, manganese 6.3-6.5, nickel 1.1-1.3, tin 0.16-0.18, chromium 2.1-2.3, Hf0.1-0.2, Nb1.16-1.27, surplus are copper.

2. the production method of high temperature resistant Cu alloy material according to claim 1, is characterized in that:

3. the production method of high temperature resistant Cu alloy material according to claim 2, it is characterized in that: described casting postheat treatment is: be first warming up to 250-260 DEG C by room temperature with 240-250 DEG C/h of speed, insulation 50-60 minute, be warming up to 560-570 DEG C with 240-250 DEG C/h of speed again, insulation 1-2 hour; Be cooled to 100-120 DEG C with 250-260 DEG C/h of speed again, insulation 1-2 hour; Be warming up to 360-380 DEG C with 240-250 DEG C/h of speed again, insulation 1-2 hour; Be cooled to 100-120 DEG C with 150-160 DEG C/h of speed again, insulation 1-2 hour; Be warming up to 310-330 DEG C with 200-210 DEG C/h of speed again, insulation 1.5-2 hour, takes out air cooling and get final product.

4. the production method of high temperature resistant Cu alloy material according to claim 2, is characterized in that: described refining agent is made up of the raw material of following weight part: silica 1 5-20, rhombspar 3-5, bitter water chestnut soil 4-8, clay 30-35, titanium dioxide 2-3, fluorite 6-8, jade powder 3-4, montmorillonite 1-2, trees ashes 1-2, Na ₂tiF ₆8-10, Sodium Silicofluoride 3-4; Its preparation method is that silicon-dioxide, rhombspar, bitter water chestnut soil, clay, titanium dioxide, fluorite, jade powder, montmorillonite, trees ashes are mixed, be heated to 2600-3000 DEG C, stir 1-2 hour, after cooling, be added in the hydrochloric acid soln of 10-15%, soak 1-2 hour, filter, filter residue is cleaned with clear water repeatedly, dries, and merges and mixes and get final product with other composition.