CN104032167A

CN104032167A - Valve copper alloy material and preparation method thereof

Info

Publication number: CN104032167A
Application number: CN201410197406.3A
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 valve copper alloy material comprises the following chemical elements in percent by mass: 7.0-7.5% of Ni, 1.2-1.4% of Si, 17.7-18.1% of Zn, 0.4-0.7% of V, 0.6-0.9% of Ti, and the balance Cu. By adding Ni, Si, V, Ti and other elements into brass alloy, the copper alloy is improved in hardness, improved in wear resistance, improved in cutting performance and corrosion resistance, and good in fracture resistance. By reasonably controlling the processing temperature after casting and taking waste copper as a raw material, the hardness of the core part and the hardness of the surface are basically consistent, and the alloy quality is uniform. The copper alloy is suitable for preparing valves and other easily-corroded 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 valve 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 valve 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 valve Cu alloy material and preparation method thereof, this Cu alloy material has that fold resistance is good, hardness is high, corrosion resistant advantage.

Technical scheme of the present invention is as follows:

A kind of valve Cu alloy material, is characterized in that: chemical element composition and mass percent thereof that it contains are: nickel 7.0-7.5, silicon 1.2-1.4, zinc 17.7-18.1, V0.4-0.7, Ti0.6-0.9, surplus are copper.

The production method of described valve Cu alloy material, is characterized in that:

(1), preparing fine copper and copper scrap originates as copper matrix in 1:0.3-0.6 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) nickel, Ti; (2) zinc; (3) other remaining components; The each batch of timed interval of dropping into element is 21-26 minute, after feeding intake, stirs.

Described casting postheat treatment is: be first warming up to 400-420 DEG C by room temperature with 220-230 DEG C/h of speed, then be cooled to 300-320 DEG C with 250-260 DEG C/h of speed, then be warming up to 540-550 DEG C with 220-230 DEG C/h of speed, insulation 1-2 hour; Be cooled to 100-120 DEG C with 260-270 DEG C/h of speed again, insulation 1-2 hour; Be warming up to 360-380 DEG C with 220-230 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; Be warming up to 270-280 DEG C with 150-160 DEG C/h of speed again, insulation 2-3 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

Brass alloys of the present invention, by adding the elements such as nickel, silicon, V, Ti, have improved hardness and the wear resisting property of copper alloy, have improved cutting ability and erosion resistance, have good fracture resistance; By reasonable control casting post-processing temperature, use copper scrap as raw material, make core hardness and surface hardness basically identical, alloy quality homogeneous.Copper alloy of the present invention is applicable to make the corrosion-prone parts such as valve.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 valve Cu alloy material, chemical element composition and mass percent thereof that it contains are: nickel 7.0-7.5, silicon 1.2-1.4, zinc 17.7-18.1, V0.4-0.7, Ti0.6-0.9, surplus are copper.

The production method of described valve Cu alloy material is as follows:

(1), preparing fine copper and copper scrap originates as copper matrix in 1:0.5 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) nickel, Ti; (2) zinc; (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 410 DEG C by room temperature with 225 DEG C/h of speed, then be cooled to 310 DEG C with 255 DEG C/h of speed, then be warming up to 545 DEG C with 225 DEG C/h of speed, be incubated 1.5 hours; Be cooled to 110 DEG C with 265 DEG C/h of speed again, be incubated 1.5 hours; Be warming up to 370 DEG C with 225 DEG C/h of speed again, be incubated 1.5 hours; Be cooled to 110 DEG C with 255 DEG C/h of speed again; Be warming up to 275 DEG C with 155 DEG C/h of speed again, be incubated 2.5 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 valve Cu alloy material, tensile strength б b is 587Mpa, yield strength 520MPa, hardness value HB is 160, electric conductivity %IACS68,590 DEG C of softening temperatures, 20 DEG C of unit elongation 13.6%.

Claims

1. a valve Cu alloy material, is characterized in that: chemical element composition and mass percent thereof that it contains are: nickel 7.0-7.5, silicon 1.2-1.4, zinc 17.7-18.1, V0.4-0.7, Ti0.6-0.9, surplus are copper.

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

3. the production method of valve Cu alloy material according to claim 2, it is characterized in that: described casting postheat treatment is: be first warming up to 400-420 DEG C by room temperature with 220-230 DEG C/h of speed, be cooled to 300-320 DEG C with 250-260 DEG C/h of speed again, be warming up to 540-550 DEG C with 220-230 DEG C/h of speed again, insulation 1-2 hour; Be cooled to 100-120 DEG C with 260-270 DEG C/h of speed again, insulation 1-2 hour; Be warming up to 360-380 DEG C with 220-230 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; Be warming up to 270-280 DEG C with 150-160 DEG C/h of speed again, insulation 2-3 hour, takes out air cooling and get final product.

4. the production method of valve 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.