CN106103755A - Water tube component low-lead brass alloy - Google Patents
Water tube component low-lead brass alloy Download PDFInfo
- Publication number
- CN106103755A CN106103755A CN201580014681.XA CN201580014681A CN106103755A CN 106103755 A CN106103755 A CN 106103755A CN 201580014681 A CN201580014681 A CN 201580014681A CN 106103755 A CN106103755 A CN 106103755A
- Authority
- CN
- China
- Prior art keywords
- mass
- corrosion
- content
- less
- test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/04—Alloys based on copper with zinc as the next major constituent
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Domestic Plumbing Installations (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The problem of the present invention is to obtain being able to maintain that the Dezincification corrosion resistant as needed for water tube component, and suppresses the content of Bi to guarantee recycling property, plays resistant to corrosion corrosive, even as the brass alloys that the mechanical property of water tube component is also excellent simultaneously.The copper alloy of the present invention, it contains the Zn of below more than 24 mass % and 34 mass %, the Pb more than the P more than the Al more than Sn more than 0.5 mass % and below 1.7 mass %, 0.4 mass % and below 1.8 mass %, 0.005 mass % and below 0.2 mass %, 0.01 mass % and below 0.25 mass %, and remaining is copper and inevitable impurity.Wherein, in the case that Sn is less than 1.0 mass %, quality % of Al and Sn meets Al+2 × Sn >=2.8.
Description
Technical field
The present invention relates to be applicable to brass alloys system and there is the material of water tube component of erosion-corrosion service tolerance.
Background technology
At present, the JIS H5120 brass casting part CAC203 used in the water pipe associated components such as tap metal fittings
Comprise the lead of 0.5～3.0 mass %, very difficult reply in recent years the whole world implement in the copper alloy used in water tube component
The restriction of lead.Therefore, in order to reduce the impact of harmful lead, studying the copper alloy manufacturing the content reducing lead always.
But, if reducing merely lead content, then the castability of copper alloy, machinability, resistance to pressure reduce, and cause for example using
Can leak in the case of valve.Reduce brought change of properties to make up such lead, and studying logical
Cross and make it contain Bi to improve machinability, Dezincification corrosion resistant, resistance to pressure.
Following patent document 1 for example recorded in addition to containing Zn possibly together with 0.4～3.2 mass % Al, 0.1～
The Bi of 4.5 mass %, the brass alloys of P of 0.001～0.3 mass %, which inhibits the content of lead, and, it is suppressed that dezincification
Corrosion, improves mechanical property, castability.
Prevent the abrasiveness of water-quality deterioration, machinability and pre-electroplating treatment excellent in addition, following patent document 2 has been recorded
Brass alloys, its comprise 0.3～1.0% Sn, 0.5～1.0% Ni, 0.4～8% Al, 0.01～0.03% P,
The Bi of 1.0～2.0%, the Sb (such as No.6,20) of trace.In addition, also stated that in above-mentioned composition also by weight bag
The brass alloys of the B containing 5～10ppm.
But, in order to ensure machinability, the copper alloy containing more Bi must be with other copper without Bi when recycling
Alloy is used separately.If this is because be mixed into Bi in the copper alloy for example containing Pb, this copper alloy can embrittlement.Patent literary composition
Offer the alloy involved by 1 because having Bi, so there is this problem, in addition, the alloy involved by patent document 2 also has and reality
Execute the identical problem of example No.6.
For this problem, it is known to do not contain Bi and be considered as the useful brass of water tube component from recycling property this point
Alloy.For example, the alloy of the comparative example No.20 of patent document 2 is because without Bi, so needs will not be occurred to sentence when recycling
The problem not having or not Bi.
Having recorded the Cu alloy material of the copper alloy as wire rod in following patent document 3, it does not contains Bi and Pb, contains
Cu:62～91mass%, Sn:0.01～4mass%, Zr:0.0008～0.045mass%, P:0.01～0.25mass%, its
Remaining is Zn (such as No.803).In this copper alloy, having following condition: in addition to the scope of above-mentioned content, its composition exists
62≤Cu-0.5 × Sn-3 × P≤90 are met between quality % of Cu, Sn, P.And then, also there is following condition: formed α phase,
The content that adds up to of γ phase and β phase is calculated as the phase constitution of 95～100% with area ratio, and average crystallite particle diameter during melting and solidification exists
Below 0.2mm.However, if it is desired to be converted to this wire rod alloy in water tube component, then due to without Bi, so recycling
Property abundant, but the machinability of necessity cannot be played.
In addition, when brass alloys are used for water tube component, also there is the important topic outside recycling property.No matter which kind of
Brass alloys, when for water tube component such as valves, are all exposed to be referred to as causing because of the rapid flow of water of erosion-corrosion service
Corrosion in.In the case that brass alloys contact with the water of standing, the oxidized film of metal material surface gently covers, by
This, prevent corrosion, but, in the environment of being exposed to flowing water, in addition to common corrosion, the shearing that reason flows and causes
Power, the impact of turbulent flow, oxide-film is damaged so that Corrosion developing goes down.The resistance to of alloy of the comparative example No.20 of patent document 2 is invaded
Erosion-corrosivity is insufficient.As having such resistant to corrosion-corrosive brass alloys, for example, can enumerate such as following patent
Alloy as document 4～6.
Having recorded the excellent copper alloy of resistant to corrosion-corrosivity in patent document 4, it comprises Zn: greater than be equal to 10 be less than
25wt%, P:0.005～0.070wt%, Sn:0.05～1.0wt%, Al:0.05～1.0wt%, and then, by total 0.005
～1.3wt% comprises any a kind or 2 kinds in Fe:0.005～1.0wt%, Pb:0.005～0.3wt%, and remaining is copper and not
Evitable impurity.
Close in addition, patent document 5 has been recorded grain size number at the excellent copper of the Dezincification corrosion resistant of below 0.015mm
Gold, its must comprise Zn:25～40wt%, P:0.005～0.070wt%, Sn:0.05～1.0wt%, Al:0.05～
1.0wt%, and then, comprise in Fe:0.005～1.0wt%, Pb:0.005～0.3wt% by adding up to 0.005～1.3wt%
Any a kind or 2 kinds, remaining is copper and inevitable impurity.
And then, patent document 6 is recorded the excellent copper alloy of Dezincification corrosion resistant, it is characterised in that be to close to following
After gold carries out final annealing, and then the processing stage with 3～20% implements cold rolling obtaining, this alloy must comprise Zn:25～
40wt%, P:0.005～0.070wt%, Sn:0.05～1.0wt%, Al:0.05～1.0wt%, Si:0.005～
1.0wt%, and then, 0.005～1.3wt% comprises in Fe:0.005～1.0wt%, Pb:0.005～0.3wt% in an amount
Any a kind or 2 kinds, remaining is copper and inevitable impurity.
In addition, recorded, in following patent document 7, the copper alloy containing Zr, Te with micro-form, it contains Zn:
8～40%, Zr:0.0005～0.04%, P:0.01～0.25%, possibly together with Si:2～5%, Sn:0.05～6 mass % and
One kind or two or more in mass % of Al:0.05～3.5, remaining is Cu and inevitable impurity.In addition, as embodiment
105, describe and not there is Si, Bi, and by Zn:27%, Sn:0.8%, Al:0.8%, P:0.05%, Pb:0.18%, Zr:
0.005%th, the copper alloy that Te:0.12% is formed.
Entered in addition, following patent document 8 has been recorded by the impact that each element is brought is utilized zinc equivalent (Zneq)
Row is unified, and the example that zinc equivalent Zneq meets the condition of inequality and is found that the alloy of the physical property meeting necessity.But, it is
Comprise the example of Bi.Specifically, containing Al:0.4～2.5 mass %, P:0.001～0.3 mass %, Bi:0.1～4.5 matter
Amount %, and, Ni:0～5.5 mass %, the content of Mn, Fe, Pb, Sn, Si, Mg, Cd is respectively 0～0.5 mass %, contains
Zn, remaining is Cu and inevitable impurity.Further, the content with following condition: Zneq and Al meets following formula (1) (2).
Zneq+1.7×Al≥35.0 (1)
Zneq-0.45 × Al≤37.0 (2)
Patent document
Patent document 1:WO2013/145964 A1
Patent document 2: Japanese Unexamined Patent Publication 2000-239765 publication
Patent document 3: No. 4094044 publications of Japanese Patent
Patent document 4: Japanese Laid-Open Patent Publication 60-138034 publication
Patent document 5: Japanese Laid-Open Patent Publication 61-199043 publication
Patent document 6: Japanese Laid-Open Patent Publication 62-30862 publication
Patent document 7:WO2007/091690 A1
Patent document 8: No. 5522582 publications of Japanese Patent Publication No.
Content of the invention
But, the Zn content in the alloy involved by patent document 4 is less, so tensile strength is not enough, mechanical property is sent out
Raw problem.In addition, although document is advocated resistant to corrosion-corrosivity, but, actually Sn content is not enough, and resistant to corrosion-corrosivity is not
Fully.
The Zn content in alloy involved by patent document 5 and 6 is more, so there is problems in that percentage elongation easily becomes
Obtain insufficient, in addition, be also susceptible to Dezincification corrosion.And then, resistant to corrosion-corrosivity is also insufficient.
In addition, patent document 7 comprises Zr, Te as indispensable element, if so being used in mixed way with other copper alloys,
Existing problems.Because particularly Te has toxicity, be undesirable for water tube component.
And then, the alloy of patent document 8 contains Bi, so cannot close with other common copper containing Pb when recycling
Gold is used in mixed way.In addition, there is also the insufficient problem of resistant to corrosion-corrosivity.
Therefore, it is an object of the invention to obtain following brass alloys: be able to maintain that and take off as resistance to necessary to water tube component
Zine corrosion, and, suppression uses the element playing toxicity, suppresses the content of Bi to guarantee recycling property, makes it play simultaneously
Resistant to corrosion-corrosivity, the even mechanical property as water tube component are also excellent.
The present invention solves above-mentioned problem by a kind of water tube component low-lead brass alloy, the low lead of this water tube component
Brass alloys contain the Zn of below more than 24 mass % and 34 mass %, the Sn more than 0.5 mass % and below 1.7 mass %,
The P more than Al more than 0.4 mass % and below 1.8 mass %, 0.005 mass % and below 0.2 mass %, 0.01 mass %
Pb above and below 0.25 mass %, remaining is copper and inevitable impurity,
In the case that Sn is less than 1.0 mass %, quality % of Al and Sn meets the condition of following formula (3).
·Al+2×Sn≥2.8……(3)
Preferably Pb is relatively low, but, in the limited scope of the impact that health is caused by suppression, also contribute on a small quantity
Machinability.In addition, Pb and Al-P compound combines and works as chip-breaker, thus, it is remarkably contributing to improve cutting
Property.Thus, the alloy substantially ensuring that machinability and can be used for manufacturing water tube component is become.In addition, by the Sn containing ormal weight,
The durability of resistant to corrosion-corrosion can be played, further, it is possible to play as the stretching required by the brass alloys comprising many Zn
Intensity, percentage elongation, the 0.2% such mechanical property of endurance.
Should illustrate, in the case that Sn is less than 1.0 mass %, in order to ensure resistant to corrosion-corrosivity, as other
Part, needs to meet the condition of above-mentioned formula (3) between Al.Although Al and Sn both participates in resistant to corrosion-corrosivity, but, especially
It is in the environment of Sn is less than 1.0 mass %, in terms of contributing to resistant to corrosion-corrosivity, by the influence power of 2 times of performance Al.
In order to ensure balance and the physical property obtaining necessity of alloy, the condition of above-mentioned formula (3) need to be guaranteed.On the other hand, if Sn is
More than 1.0 mass %, even if being then unsatisfactory for above-mentioned formula (3), it is also possible to guarantee resistant to corrosion-corrosivity fully, simultaneously also can be true
Protect 0.2% endurance.
Should illustrate, similarly make that the element that machinability is improved has Si, but, brass involved in the present invention closes
Jin Zhong, its amount being comprised less than the form with inevitable impurity.This is because Si easily produce oxide and in profit again
With there is problem in property, mechanical property, particularly percentage elongation, furthermore, it is possible to make resistant to corrosion-corrosivity reduce.
In addition, as the variation of brass alloys involved in the present invention, if in addition to containing above-mentioned cooperation, also with
Scope below 0.015 mass % contains B, then be remarkably contributing to Dezincification corrosion resistant effect.
And then, as brass alloys involved in the present invention other variation, in addition to containing above-mentioned cooperation, also with
Scope below 1.8 mass % contains Ni, thus, is also very helpful to Dezincification corrosion resistant effect.
In accordance with the invention it is possible to manufacture the content of suppression Bi and improve recycling, and also ensure that machinability, also have
Resistant to corrosion-corrosive, the brass alloys water making pipe parts that ensure that security, durability and convenience.
Brief description
Fig. 1 is the schematic diagram of tension test evaluation method.
Fig. 2 is the concept map of erosion-corrosion service experimental rig.
Fig. 3 is the reference map of machinability evaluation method.
Fig. 4 be in embodiment erosion-corrosion service depth capacity relative to the chart of the content of Sn.
Fig. 5 is the chart of the T value relative to formula (4) for the embodiment erosion-corrosion service depth capacity.
Fig. 6 is the photo illustrating the cutting swarf in machinability test.
Detailed description of the invention
Hereinafter, the present invention is described in detail.
The present invention is the brass alloys of the water tube component at least containing Zn, Sn, Al, P, Pb.
The Zn content of above-mentioned brass alloys needs more than 24 mass %, preferably more than 27 mass %.If being less than 24
Quality %, then tensile strength is not enough, and mechanical property occurs problem.In addition, by being more than 27 mass %, becoming can
Guarantee 0.2% endurance fully, the brass alloys of excellent strength.On the other hand, Zn content needs below 34 mass %, preferably
Below 32 mass %.If Zn is too much, then percentage elongation easily becomes insufficient.If in addition, Zn is more than 34 mass %, then taken off
Zine corrosion becomes excessive.
The Sn content of above-mentioned brass alloys needs more than 0.5 mass %, if being less than 0.5 mass %, then resistant to corrosion-corruption
The tolerance of erosion is insufficient.More than 1.0 mass %, then can guarantee resistant to corrosion-corrosivity fully, additionally it is possible to fully
Ground guarantees 0.2% endurance, and this is desired.On the other hand, Sn content needs below 1.7 mass %, preferably in 1.3 matter
Amount below %.This is because if Sn is too much, then percentage elongation can too reduce.In addition, be less than the situation of 1.0 mass % at Sn
Under, need to meet the condition of formula described later (3) with the relation of Al, to guarantee resistant to corrosion-corrosivity.
The Al content of above-mentioned brass alloys needs more than 0.4 mass %, preferably more than 0.6 mass %.If be less than
0.4 mass %, then tensile strength, 0.2% endurance are insufficient, and problem occurs in mechanical property.In addition, with P described later it
Between formed compound be remarkably contributing to machinability, but, if Al is not enough, then its effect also becomes insufficient.On the other hand,
Al content needs below 1.8 mass %, preferably below 1.3 mass %.If it exceeds 1.8 mass %, it is likely that elongation
Rate can too reduce.
In addition, in the case that the content of Sn is less than 1.0 mass %, the content of Sn and Al needs to meet following formula (3)
Condition.The depth capacity that can be produced by erosion-corrosion service exists with all improved tendency of the rising of Al and Sn, but,
In the environment of Sn is less than 1.0 mass %, helps to improve resistant to corrosion-corrosivity especially by increasing Sn content and pass through increasing
Adding Al content helps raising resistant to corrosion-corrosivity to compare, and presents the effect of 2 times.
·Al+2×Sn≥2.8……(3)
The P content of above-mentioned brass alloys needs more than 0.005 mass %, preferably more than 0.01 mass %.If P mistake
Few, then the Al-P compound being formed between itself and Al contributes to the effect variation of machinability, and cutting swarf is easily connected with each other.Separately
Outward, P plays deoxidation effect, and therefore, if very few, then deoxidation effect when casting reduces, so gas defects increases, and casting
Liquid oxidation and cause mobility to reduce.On the other hand, P content need below 0.2 mass %, preferably 0.15 mass % with
Under.If P is too much, then the Al-P compound etc. of hard can too increase, and percentage elongation reduces.And then, occur with the moisture of mold
Reaction, thus there is gas defects, shrinkage cavity defect increases.
The Pb content of above-mentioned brass alloys needs more than 0.01 mass %, preferably more than 0.03 mass %.By depositing
At Pb, together contribute to machinability with Al-P compound, but, if being less than 0.01 mass %, then this machinability is possible to become
Obtain insufficient.Particularly above-mentioned brass alloys comprise Sn, are formed with the γ phase of hard, and therefore, machinability is improved effect by Pb
Help is integral.On the other hand, if Pb content is more than 0.25 mass %, then in some regions, as water tube component
It is difficult to meet with alloy and leach benchmark, therefore, even if content maximum is also required to below 0.25 mass %.
As remaining composition of above-mentioned brass alloys, in addition to Cu, as due to raw material, manufacture when problem and can not
The inevitable impurity containing with avoiding, can contain element other than the above.But, the content of these elements needs to be in
In the range of not hindering the effect of the present invention.This is because: if unforeseen element is too much, then even above-mentioned element
Scope, it is also possible to bring bad impact to physical property.The total amount of these inevitable impurity is preferably shorter than 1.0 mass %,
More preferably less than 0.5 mass %.
In above-mentioned inevitable impurity, the content of Si is preferably shorter than 0.2 mass %, more preferably less than 0.1 mass %, enters
One step preferably shorter than detects the upper limit.If Si too much, then promotes the introducing of oxide, the reduction of percentage elongation, the generation of shrinkage cavity, nothing
The sound cast member of method manufacture.
In above-mentioned inevitable impurity, the content of Bi needs less than 0.3 mass %, and preferably shorter than 0.1 mass % enters one
Step is preferably shorter than the detection upper limit.If this is because comprise Bi with the amount that cannot ignore, then when product is recycled, must
Must process especially, deal with highly difficult.If containing Bi more than 0.3 mass %, then contained with the brass alloys of the present invention
Pb coexist, it is possible to cause percentage elongation insufficient, in mechanical property occur problem.
The content of the element becoming above-mentioned inevitable impurity is all preferably shorter than 0.4 mass %, more preferably less than 0.2 matter
Amount %, even more preferably below the detection upper limit.As such impurity, for example, can enumerate: Fe, Mn, Cr, Zr, Mg, Ti, Te,
Se, Cd etc..Wherein, it is therefore highly desirable that known virose Se, Cd, Te are less than 0.1 mass %, it is more desirable to less than the detection upper limit.Separately
Outward, it is desirable to the Zr that shrinkage cavity defect can be made to increase is less than 0.1 mass %, it is more desirable to less than the detection upper limit.
In addition, above-mentioned brass alloys are in addition to above-mentioned inevitable impurity, if comprising the B of more than 0.0005 mass %
Be used as being intended to containing element, then Dezincification corrosion resistant is greatly improved.This is because B makes crystal grain miniaturization, become not
It is vulnerable to the shape of Dezincification corrosion.If comprising the B of more than 0.0007 mass %, then Dezincification corrosion resistant improves further, because of
This is ideal.On the other hand, if comprising B ultrasonic to cross 0.015 mass %, then in tissue, the change of substantial amounts of hard is sometimes produced
Compound and harmful effect is brought to machinability, percentage elongation.
In addition, above-mentioned brass alloys are in addition to above-mentioned inevitable impurity, can containing Ni be used as being intended to containing
Element.If comprising the Ni of more than 0.1 mass %, then make the area of the α phase of excellent corrosion resistance increased, thus brass closes
The Dezincification corrosion resistant of gold improves.This effect can also superpose with the effect brought containing B.On the other hand, the content of Ni is excellent
It is selected in below 1.8 mass %, more preferably below 0.5 mass %.If Ni is excessively added, then the many increase mutually of the content of Sn,
Thus percentage elongation, machinability are easily reduced.If Ni is more than 1.8 mass %, then the reduction of percentage elongation becomes to ignore.In order to
Positively suppress the reduction of percentage elongation, as long as below 0.5 mass %.
Furthermore it is possible to scope interpolation both B and Ni with above-mentioned content are used as being intended in above-mentioned brass alloys
The element containing.
Should illustrate, the value of the content in the present invention represents by the content during manufacture alloys such as casting, forging, rather than
Represent the ratio in raw material.
Remaining composition of above-mentioned brass alloys is Cu.Brass alloys involved in the present invention can pass through common copper alloy
Manufacture method obtain, with this brass alloys manufacture water tube component when, it is possible to use common manufacture method (is for example cast
Make, open up copper, forging etc.) manufacture.For example can enumerate use heavy oil stove, steam stove, high-frequency induction calciner etc. and melt alloy,
And utilize the method that variously-shaped mold casts.
Embodiment
Hereinafter, the example enumerating actual manufacture brass alloys involved in the present invention is reported.First, illustrate to close brass
The test method that gold is carried out.
＜ stretching test method ＞
To utilizeThe sample of die casting be processed into specified in JIS Z2241
14A test film.Concrete shape is as shown in Figure 1.It is the former sectional area S of a kind of parallel portion0With former marking path L0There is L0=
5.65×S0The ratio test piece of the relation of ^ (1/2).Make the diameter d in bar-shaped portion0For 4mm, make former marking path L0For 20mm, make
Columned parallel minister degree LcFor 30mm, the radius R making shoulder is 15mm.(L0=5.65 × (2 × 2 × π) ^ (1/2)=
20.04)
For this test film, implement tension test according to JIS Z2241, and evaluate as follows its tensile strength (MPa),
0.2% endurance (MPa) and percentage elongation (%).Should illustrate, tensile strength is examination to presenting discontinuous surrender in test
Test the maximum test force Fm that middle test film bears.0.2% endurance is plastic elongation and former marking path L0Ratio be equal to 0.2%
When stress.In addition, percentage elongation is by the permanent elongation of test to the test film after disrumpent feelings and former marking path L0Ratio use
Percentage represent obtained from value.
The evaluation of tensile strength: " Good " (G) ... more than 300MPa, " Fair " (F) ... more than 250MPa and low
In 300MPa, " Insufficient " (I) ... be less than 250MPa.
The evaluation of 0.2% endurance: " Good " (G) ... more than 100MPa, " Fair " (F) ... more than 80MPa and low
In 100MPa, " Insufficient " (I) ... be less than 80MPa.
The evaluation of percentage elongation: " Good " (G) ... more than 25%, " Fair " (F) ... 20% less than the 25%th,
" Insufficient " (I) ... be less than 20%.
＜ erosion-corrosion service tests ＞
As in figure 2 it is shown, be processed into the sample of the die casting utilizing Φ 20 × 120mmLCylinder
Shape, as test film 12, installs the nozzle of 1.6mm bore in the position separating 0.4mm gap relative to this test film 12
11, make 1%CuCl2The aqueous solution 13 flows 5 hours from nozzle 11 to sample continuously with the following current of flow 0.4L/min, determination test
Weight loss (waste) and the depth capacity of sample front and back.
The evaluation of waste: " Good " (G) ... be less than 250mg, " Fair " (F) ... 250mg less than
350mg, " Insufficient " (I) ... more than 350mg.
The evaluation of erosion-corrosion service depth capacity: " Good " (G) ... less than 150 μm, " Fair " (F) ... ratio 150 μm
Deep and less than 200 μm, " Insufficient " (I) ... deeper than 200 μm.
＜ boring test ＞
For various alloys, drilling machine is utilized to implement boring test.Boring test is by being machined into each sample materialDrilling machine is used to evaluate with the borehole conditions shown in table 1.Evaluation method is the hole institute measuring and boring 5mm
The time needing, below 20sec is evaluated as " Good " (G), 20sec will be exceeded and below 25sec is evaluated as " Fair " (F), will
It is evaluated as " Insufficient " (I) more than 25sec.
[table 1]
＜ lathe process tests ＞
For the alloy tested, by universal lathe, use superhard soldering lathe tool, with feed speed 0.15mm/
Rev, rotating speed 550rpm, to utilizationThe sample of die casting carry out Dry-cutting, obtain
Cutting swarf.Good judgement, as it is shown on figure 3, classify according to shape, is (" Good " (G)) by the evaluation method of cutting swarf,
It is (" Insufficient " (I)) by bad judgement.
＜ Dezincification corrosion test method ＞
To utilizeThe sample of die casting be cut into the square cubic of 10mm, system
Become test film, test according to ISO6509.That is, the surrounding of test film is covered by the epoxy resin of more than thickness 15mm, only
The one side making test film comes out from resin.By this exposure 100mm2After grinding with wet lapping paper, with No. 1200
Pouncing paper finishes, and is carried out with ethanol before will testing.In this epoxy resin of embedment and only one side is exposed
Sample out impregnates 24 hours in the 12.7g/L copper chloride solution of 250mL in 75 ± 5 DEG C.After off-test, clear with water
Wash, after alcohol flushing, use rapidly the dezincification degree of depth of its section of light microscope determining.Specifically, by 10mm's
Sample is divided into 5 visuals field, for each visual field, measures the dezincification degree of depth to minimum point and maximum point, will add up to 10 points
Mean value is as Dezincification corrosion mean depth, using the degree of depth of point the deepest in this 10 points as Dezincification corrosion depth capacity, and
It is carried out as follows evaluation.By their result be not × sample be considered as qualified.
The evaluation of Dezincification corrosion mean depth: " Very Good " (V) ... less than 50 μm, " Good " (G) ... 50 μm
Less than 100 μm, " Fair " (F) ... 100 μm less than 200 μm, " Insufficient " (I) ... 200 μm
Above.
The evaluation of Dezincification corrosion depth capacity: " Very Good " (V) ... less than 100 μm, " Good " (G) ... 100
μm less than 200 μm, " Fair " (F) ... 200 μm less than 400 μm, " Insufficient " (I) ... 400 μ
More than m.
Manufacture method ＞ of ＜ sample
Mixing constitutes the material of various element, after utilizing high-frequency induction calciner to found, casts, according to each table
Described in each example of content produce sample.Should illustrate, the value of content is entirely quality %, for the mensuration after manufacture
Value.For obtained each copper alloy, carry out following test.Should illustrate, in each example in table, Sb, Si, Fe are all low
In the detection upper limit.In addition, the element being silent in table and empty hurdle all represent less than the detection upper limit.
First, change the respective content of Sn and Al, confirm the content of above-mentioned formula (3).Use it for composition, the mechanics evaluated
The result that performance and erosion-corrosion service (EC) are tested is shown in table 2.It with the value of Sn as transverse axis, is vertical with erosion-corrosion service depth capacity
This result is made broken line graph according to each Al concentration, and is shown in Fig. 4 by axle.Should illustrate, test example 1～4 is Al:0.6 mass %
Example, the example that test example 5～8 is Al:1.0 mass %, the example that test example 9～12 is Al:1.7 mass %.In each group,
So that the order example arrangement that the amount of Sn increases.
[table 2]
As seen from the experiment: unrelated with the content of Al, the example in region more than 1.0 mass % for the content of Sn and Sn
Comparing less than the example in the region of 1.0 mass %, the improvement of erosion-corrosion service (EC) depth capacity is obvious.In addition, understand containing of Sn
In the case of measuring identical, the content of Al is more, and erosion-corrosion service depth capacity more can be improved.Wherein, it is known that this tendency is special
It is to present significantly in the content of Sn is less than the region of 1.0 mass %.
Therefore, Sn in above-mentioned example is studied less than the example of 1.0 mass %.That is, it is 0.6 mass % by Al
Test example 1 and the 2nd, Al be 1.0 mass % test example the 5th, the 6th, Al be that the 9th, the test example of 1.7 mass % 10 is chosen, and be shown in table 3.
Wherein, test example the 1st, the 2nd, the erosion-corrosion service depth capacity of 5 become " Insufficient ".The content of the Sn in test example 2 is had a competition
Test high about 0.2 mass % of example 1.In addition, high about 0.4 mass % of content ratio test example 1 of the Al in test example 5.Further, test example
2 is roughly the same with the value of the erosion-corrosion service depth capacity of test example 5.That is, compared with test example 1, Sn content increases by 0.2%
Test example 2 and Al content increases the decrement phase relative to test example 1 for the erosion-corrosion service depth capacity of the test example 5 of 0.4%
Deng.Thus, thus it is speculated that: in the region less than 1.0 mass % for the Sn, erosion-corrosion service together is increased for the content with Sn or Al
The minimizing of depth capacity is for improving resistant to corrosion-corrosive help, and the content of Sn increases the content that effect is Al and increases effect
2 times of fruit.Thus, it is possible to the numerical value T that will be obtained by following formula (4) is used as resistant to corrosion-corrosive index.
[table 3]
T=Al+2 × Sn ... (4)
With the value of this formula (4) as transverse axis, with the value of erosion-corrosion service depth capacity as the longitudinal axis, the data of above-mentioned table 3 are made
Become chart, and be shown in Fig. 5.Mapping results is as follows: value T of formula (4) less than 2.8 in the range of, with value upper of formula (4) T
Rising, erosion-corrosion service depth capacity presents the minimizing tendency of substantially linear.In addition, in the scope that value T of formula (4) is more than 2.8
In, erosion-corrosion service depth capacity presents the tendency of constant.It is possible to confirm: the content at Sn is less than 1.0 mass %
In the case of, by meeting the condition of above-mentioned formula (3), resistant to corrosion-corrosivity can be guaranteed fully.
In above-mentioned test example, test example the 3rd, the 4th, 6～12 embodiment being equivalent to alloy involved by the present application.Its
In, the 9th, the 6th, test example 10 be equivalent to meet the embodiment that Sn is less than the condition of 1.0 mass % and above-mentioned T >=2.8.On the other hand,
The 11st, the 8th, the 7th, the 4th, the 3rd, test example 12 be equivalent to meet the embodiment of condition more than 1.0 mass % for the Sn.
During it follows that utilize tension test and erosion-corrosion service test evaluation to change Zn, Al, P, Sn and Pb respective content
, mechanical property, resistant to corrosion-corrosive change.Its composition and result are shown in table 4.
[table 4]
First, preparation changes the example of the content of Zn.Zn is less than in the comparative example 1 of 24 mass %, and tensile strength occurs
Problem.In embodiment 1 more than 24 mass % for the Zn, it can be ensured that the tensile strength of a certain degree, Zn is more than 27 mass %
Embodiment the 2nd, in 3, it can be ensured that sufficient tensile strength.On the other hand, Zn is too much and more than the comparative example 2 of 34 mass %
In, percentage elongation generation problem.
Second, preparation changes the example of the content of Al.Al less than detection the upper limit comparative example 3 in, tensile strength and
0.2% endurance is all insufficient.Al is in the embodiment 4 of 0.39 mass %, it can be ensured that the tensile strength of a certain degree and 0.2%
Endurance, embodiment more than 0.6 mass % for the Al is the 5th, the 3rd, in 6, it can be ensured that sufficient tensile strength and 0.2% endurance.Another
Aspect, Al is too much and more than in the comparative example 4 of 1.8 mass %, and percentage elongation generation problem, Al is for less than the 1.66 of 1.8 mass %
In the embodiment 6 of quality %, it can be ensured that the percentage elongation of a certain degree.
3rd, preparation changes the example of the content of P.In the slightly many embodiments 8 of P, resistant to corrosion-corrosivity somewhat reduces.
And then, P more and more than in the comparative example 5 of 0.2 mass %, percentage elongation too reduces.
4th, preparation changes the example of the content of Sn.Sn be the comparative example 6 and Sn of 0.11 mass % be 0.31 mass %
Comparative example 7 in, resistant to corrosion-corrosivity is insufficient, and loss in weight amount and depth capacity are in-problem value.Have 0.91
In the embodiment 9 of Sn and T=Al+2 of quality % × Sn=2.82, it can be ensured that the resistant to corrosion-corrosivity of a certain degree.Enter
And, embodiment more than 1.0 mass % for the Sn is the 3rd, in 10, it can be ensured that sufficient resistant to corrosion-corrosivity.On the other hand, Sn surpasses
Crossing the comparative example of 1.7 mass % the 8th, in 9, percentage elongation too reduces.Sn is in the embodiment 10 of 1.54 mass %, it can be ensured that certain
The percentage elongation of one degree.
5th, preparation changes the example of the content of Pb.Embodiment the 11st, the 3rd, 12 scope in, mechanical property and resistant to corrosion-
Corrosivity is all good.But, Pb is close in the embodiment 12 of 0.25 mass %, and discovery percentage elongation somewhat reduces.
＜ evaluates machinability ＞ by P and Pb
It follows that machinability change when being adjusted the content of P and Pb by boring test and lathe process test evaluation.Will
Its composition and result are shown in table 5.
[table 5]
First, the difference that the change of P is caused is verified.Prepare the embodiment 13 and P that P is 0.009 mass % less than detection
The comparative example 10 of the upper limit.To these test examples and the above embodiments the 7th, the 3rd, the 8th, comparative example 5 carry out boring test.P is less than detection
In the comparative example 10 of the upper limit, excessively spending the time, cutting swarf is connected with each other.Comprise the embodiment of the P of more than 0.005 mass %
13rd, the 7th, in 3, boring can be completed with the enough short time.In addition, the cutting swarf that the 13rd, embodiment obtains in 3 is separately.Can
Using it is thought that cause owing to the Al-P compound by being formed containing P works as chip-breaker when cutting.Separately
On the one hand, P is more than in embodiment the 8th, the comparative example 5 of 0.1 mass %, and the spent time of holing somewhat increases, it is impossible to ignore.
In addition, come evaluation comparison example the 10th, embodiment the 13rd, embodiment 3 by the shape of cutting swarf.By their photo respectively
It is shown in Fig. 6 (a), (b), (c).In comparative example 10, produce and there is the cutting swarf being connected to each other to spiral helicine problem, but, P increases
In the embodiment 13 adding, cutting swarf shortens on the whole, and in the embodiment 3 that P increases further, cutting swarf is shorter, becomes excellent
Example.
It follows that the difference that the change of checking Pb is caused.Again the comparative example 11 less than the detection upper limit for the Pb is prepared.To this
The 3rd, the 11st, comparative example and the above embodiments 12 carry out boring test.Pb is less than in the comparative example 11 of setting, and drilling time is obvious
Elongated.Pb is in the embodiment 11 of 0.025 mass %, and drilling time can be suppressed in a certain degree to guarantee machinability.Pb
In more embodiment 3 and 12, drilling time fully shortens.In addition, come evaluation comparison example 11 and reality by the shape of cutting swarf
Execute example 11.The photo of comparative example the 11st, the cutting swarf of embodiment 11 is shown in Fig. 6 (d), (e).The shape of cutting swarf does not all have
Problem.
And then, it as the example without P and Pb simultaneously, is prepared for comparative example 12.Evaluate this by the shape of cutting swarf
Comparative example 12, and carry out boring test.The photo of its cutting swarf is shown in Fig. 6 (f).As a result, due to comparative example 12 without P and
Pb, therefore, cutting swarf has the problem being connected to each other longer compared with the comparative example 10 containing only Pb, in boring test, with
Comparative example 10 is compared, and the time also significantly more increases.
And then, example is lined up individual case is verified.This data are shown in table 6.
[table 6]
Result ＞ of ＜ Dezincification corrosion test
Using embodiment the 2nd, embodiment the 3rd, comparative example 2, the difference of checking Zn makes how the degree of depth of Dezincification corrosion changes.Zn
In enough less embodiment 2, show excellent value, in embodiment 3, corrode less.In contrast, Zn is more than 34 mass %
In comparative example 2, depth capacity shows the value close to tolerable limit, and mean depth substantially deteriorates.
Result ＞ that Bi is caused is added in ＜ checking
With the comparative example 13 preparing the Bi comprising 0.35 mass % close to embodiment 3, results verification arrives: percentage elongation
Being greatly reduced, recycling property and mechanical property have problem.
Result 1 ＞ that Ni is caused is added in ＜ checking
With close to the embodiment 14 preparing the Ni adding 0.82 mass % further of embodiment 3 with similarly add
The comparative example 14 of the Ni of 1.88 mass %.The Dezincification corrosion resistant of embodiment 14 and comparative example 14 is all greatly improved, but, contain
In the comparative example 14 of the Ni of 1.88 mass %, percentage elongation too reduces.
Result 2 ＞ that Ni is caused is added in ＜ checking
Preparation reduces Sn compared with embodiment 14 and increases the embodiment the 15th, 16 of Pb.Ni is more compared with embodiment 15
The Dezincification corrosion resistant of embodiment 16 improves further.In addition, measure embodiment the 15th, 16 resistant to corrosion-corrosivity as a result, all
For good result.But, in embodiment 16, also display is able to ensure that the percentage elongation of a certain degree but somewhat reduces.
Result 1 ＞ that B is caused is added in ＜ checking
With the embodiment 17 preparing the B adding 0.006 mass % further close to embodiment 3.Embodiment 3 and reality
The mechanical property executing example 17 is all relatively big, and Dezincification corrosion resistant is greatly improved.
Result 2 ＞ that B is caused is added in ＜ checking
With the embodiment 18～20 preparing the addition adding B close to embodiment 3.The B content of embodiment 18
Being 0.0007 mass %, the B content of embodiment 19 is 0.0012 mass %, and the B content of embodiment 20 is 0.011 mass %.Resistance to
Dezincification corrosion increases with the addition of B and significantly improves, and the Dezincification corrosion resistant of embodiment 20 is excellent especially.But, real
Execute example 20 also to show and be able to ensure that the percentage elongation of a certain degree but decrease.
Result ＞ that B and Ni is caused is added in ＜ checking
With the addition of the embodiment 21～23 of both B and Ni close to preparing of embodiment 3.Dezincification corrosion resistant is equal
Present value excellent especially.But, in each example, all display is able to ensure that the percentage elongation of a certain degree but decreases.
Symbol description
11 nozzles
12 test films
13 CuCl2The aqueous solution
Claims (4)
1. a water tube component low-lead brass alloy, it contains the Zn of below more than 24 mass % and 34 mass %, 0.5 matter
More than the Al more than Sn below amount more than % and 1.7 mass %, 0.4 mass % and below 1.8 mass %, 0.005 mass %
And the Pb more than 0.2 P below mass %, 0.01 mass % and below 0.25 mass %, remaining is copper and inevitably miscellaneous
Matter,
In the case that Sn is less than 1.0 mass %, quality % of Al and Sn meets the condition of following formula (1),
Al+2×Sn≥2.8……(1)。
2. water tube component low-lead brass alloy according to claim 1, wherein,
Sn is more than 1.0 mass %.
3. a water tube component low-lead brass alloy, it is except containing the water tube component copper alloy described in claim 1 or 2
Beyond cooperation, possibly together with the B more than 0.0005 mass % and below 0.015 mass %.
4. a water tube component low-lead brass alloy, it is except containing the water tube component described in any one in claims 1 to 3
Beyond the cooperation of copper alloy, possibly together with the Ni more than 0.1 mass % and below 1.8 mass %.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JPPCT/JP2014/059499 | 2014-03-31 | ||
| JP2014059499 | 2014-03-31 | ||
| PCT/JP2015/056671 WO2015151720A1 (en) | 2014-03-31 | 2015-03-06 | Low-lead brass alloy for plumbing member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106103755A true CN106103755A (en) | 2016-11-09 |
Family
ID=54240053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580014681.XA Pending CN106103755A (en) | 2014-03-31 | 2015-03-06 | Water tube component low-lead brass alloy |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20170121791A1 (en) |
| EP (1) | EP3128020B1 (en) |
| JP (1) | JP6482530B2 (en) |
| KR (1) | KR102314457B1 (en) |
| CN (1) | CN106103755A (en) |
| WO (1) | WO2015151720A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115710655A (en) * | 2022-11-25 | 2023-02-24 | 有研工程技术研究院有限公司 | High-corrosion-resistance antibacterial copper alloy material and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4294629A (en) * | 1979-10-02 | 1981-10-13 | Trefimetaux | Drawn rods made of lead brass and a process for the thermal treatment thereof |
| JPS61199043A (en) * | 1985-11-29 | 1986-09-03 | Nippon Mining Co Ltd | Copper alloy having superior corrosion resistance and its manufacture |
| JP2000239765A (en) * | 1999-02-18 | 2000-09-05 | Joetsu Material Kk | Leadless corrosion resistant brass alloy for metallic mold casting or for sand mold casting, metallic mold cast product or sand mold cast product, and leadless corrosion resistant brass alloy for continuous casting or continuous cast product |
| CN102181745A (en) * | 2011-05-09 | 2011-09-14 | 江苏美霖铜业有限公司 | Environmentally-friendly copper material |
| JP2012207255A (en) * | 2011-03-29 | 2012-10-25 | Joetsu Bronz1 Corp | Lead-free free-machining bronze alloy for casting |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5522582B1 (en) | 1971-04-15 | 1980-06-18 | ||
| JPS59100245A (en) * | 1982-11-30 | 1984-06-09 | Nippon Mining Co Ltd | Copper alloy with superior corrosion resistance |
| JPS60138033A (en) * | 1983-12-26 | 1985-07-22 | Nippon Mining Co Ltd | Copper alloy having excellent corrosion resistance |
| JPS60138034A (en) * | 1983-12-26 | 1985-07-22 | Nippon Mining Co Ltd | Copper alloy having superior corrosion resistance |
| JPS62130294A (en) * | 1985-12-03 | 1987-06-12 | Nippon Mining Co Ltd | Electrically conductive roll |
| JPS6230862A (en) | 1986-07-16 | 1987-02-09 | Nippon Mining Co Ltd | Manufacture of copper alloy having superior corrosion resistance |
| JPH094044A (en) | 1995-06-26 | 1997-01-07 | Shin Meiwa Ind Co Ltd | Guide mechanism of plant submergible pump |
| US8506730B2 (en) * | 1998-10-09 | 2013-08-13 | Mitsubishi Shindoh Co., Ltd. | Copper/zinc alloys having low levels of lead and good machinability |
| JP3917304B2 (en) * | 1998-10-09 | 2007-05-23 | 三宝伸銅工業株式会社 | Free-cutting copper alloy |
| US7056396B2 (en) * | 1998-10-09 | 2006-06-06 | Sambo Copper Alloy Co., Ltd. | Copper/zinc alloys having low levels of lead and good machinability |
| JP4294196B2 (en) * | 2000-04-14 | 2009-07-08 | Ｄｏｗａメタルテック株式会社 | Copper alloy for connector and manufacturing method thereof |
| JP5116976B2 (en) | 2006-02-10 | 2013-01-09 | 三菱伸銅株式会社 | Raw brass alloy for semi-fusion gold casting |
| US20110142715A1 (en) * | 2009-12-11 | 2011-06-16 | Globe Union Industrial Corporation | Brass alloy |
| CN101787461B (en) * | 2010-03-02 | 2014-11-19 | 路达(厦门)工业有限公司 | Environment-friendly manganese brass alloy and manufacturing method thereof |
| MX337957B (en) * | 2011-11-04 | 2016-03-29 | Mitsubishi Shindo Kk | Hot-forged copper alloy article. |
| US9982327B2 (en) | 2012-03-30 | 2018-05-29 | Kurimoto, Ltd. | Brass alloy for tap water supply member |
| DE112014002690T5 (en) * | 2013-06-05 | 2016-02-25 | San-Etsu Metals Co., Ltd. | copper alloy |
| EP2960351A4 (en) * | 2014-01-03 | 2016-11-23 | Jiaxing Idc Plumbing & Heating Technology Ltd | Low-lead bismuth-free silicone-free brass |
-
2015
- 2015-03-06 US US15/126,085 patent/US20170121791A1/en not_active Abandoned
- 2015-03-06 EP EP15772552.4A patent/EP3128020B1/en active Active
- 2015-03-06 WO PCT/JP2015/056671 patent/WO2015151720A1/en active Application Filing
- 2015-03-06 JP JP2016511487A patent/JP6482530B2/en active Active
- 2015-03-06 KR KR1020167030128A patent/KR102314457B1/en active IP Right Grant
- 2015-03-06 CN CN201580014681.XA patent/CN106103755A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4294629A (en) * | 1979-10-02 | 1981-10-13 | Trefimetaux | Drawn rods made of lead brass and a process for the thermal treatment thereof |
| JPS61199043A (en) * | 1985-11-29 | 1986-09-03 | Nippon Mining Co Ltd | Copper alloy having superior corrosion resistance and its manufacture |
| JP2000239765A (en) * | 1999-02-18 | 2000-09-05 | Joetsu Material Kk | Leadless corrosion resistant brass alloy for metallic mold casting or for sand mold casting, metallic mold cast product or sand mold cast product, and leadless corrosion resistant brass alloy for continuous casting or continuous cast product |
| JP2012207255A (en) * | 2011-03-29 | 2012-10-25 | Joetsu Bronz1 Corp | Lead-free free-machining bronze alloy for casting |
| CN102181745A (en) * | 2011-05-09 | 2011-09-14 | 江苏美霖铜业有限公司 | Environmentally-friendly copper material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115710655A (en) * | 2022-11-25 | 2023-02-24 | 有研工程技术研究院有限公司 | High-corrosion-resistance antibacterial copper alloy material and preparation method and application thereof |
| CN115710655B (en) * | 2022-11-25 | 2023-10-27 | 有研工程技术研究院有限公司 | High-corrosion-resistance antibacterial copper alloy material and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3128020B1 (en) | 2019-03-06 |
| KR102314457B1 (en) | 2021-10-19 |
| JPWO2015151720A1 (en) | 2017-04-13 |
| JP6482530B2 (en) | 2019-03-13 |
| EP3128020A4 (en) | 2017-04-12 |
| US20170121791A1 (en) | 2017-05-04 |
| WO2015151720A1 (en) | 2015-10-08 |
| KR20160140821A (en) | 2016-12-07 |
| EP3128020A1 (en) | 2017-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4951623B2 (en) | Free-cutting copper alloy with ultra-low lead content | |
| KR102027740B1 (en) | Free cutting copper alloy casting and manufacturing method of free cutting copper alloy casting | |
| JP5522582B2 (en) | Brass alloy for water supply components | |
| CA3142297C (en) | Free-cutting copper alloy casting, and method for producing free-cutting copper alloy casting | |
| US20160130684A1 (en) | Copper alloy for use in a member for use in water works | |
| RU2398904C2 (en) | Easy-to-cut copper alloy with exceedingly low contents of lead | |
| CN106103755A (en) | Water tube component low-lead brass alloy | |
| JP6692317B2 (en) | High corrosion resistance leadless brass alloy | |
| KR102348780B1 (en) | Brass alloy with improved corrosion resistance | |
| JP5416323B1 (en) | Brass alloy for water supply components |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161109 |