CN1542150A - Cu-zn system alloy with good of durable crack resistant performance and manufacturing method thereof - Google Patents
Cu-zn system alloy with good of durable crack resistant performance and manufacturing method thereof Download PDFInfo
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- CN1542150A CN1542150A CNA2003101202182A CN200310120218A CN1542150A CN 1542150 A CN1542150 A CN 1542150A CN A2003101202182 A CNA2003101202182 A CN A2003101202182A CN 200310120218 A CN200310120218 A CN 200310120218A CN 1542150 A CN1542150 A CN 1542150A
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 51
- 239000000956 alloy Substances 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910017518 Cu Zn Inorganic materials 0.000 claims abstract description 34
- 229910017752 Cu-Zn Inorganic materials 0.000 claims abstract description 32
- 229910017943 Cu—Zn Inorganic materials 0.000 claims abstract description 32
- 238000005480 shot peening Methods 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 229910052718 tin Inorganic materials 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 230000002035 prolonged effect Effects 0.000 claims description 51
- 238000003776 cleavage reaction Methods 0.000 claims description 25
- 230000007017 scission Effects 0.000 claims description 25
- 238000012360 testing method Methods 0.000 claims description 22
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 20
- 239000010949 copper Substances 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 230000033228 biological regulation Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 6
- 229910000952 Be alloy Inorganic materials 0.000 claims description 4
- 239000000470 constituent Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 abstract description 12
- 229910052748 manganese Inorganic materials 0.000 abstract description 6
- 238000005336 cracking Methods 0.000 abstract description 5
- 238000005422 blasting Methods 0.000 abstract 2
- 238000005488 sandblasting Methods 0.000 abstract 1
- 230000035882 stress Effects 0.000 description 22
- 239000011701 zinc Substances 0.000 description 20
- 239000000463 material Substances 0.000 description 19
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 11
- 230000006835 compression Effects 0.000 description 11
- 238000007906 compression Methods 0.000 description 11
- 238000005482 strain hardening Methods 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 7
- 239000004576 sand Substances 0.000 description 7
- 229910001297 Zn alloy Inorganic materials 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 229910000881 Cu alloy Inorganic materials 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 229910001369 Brass Inorganic materials 0.000 description 3
- 238000005275 alloying Methods 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 2
- 241000220324 Pyrus Species 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 235000021017 pears Nutrition 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 206010042209 Stress Diseases 0.000 description 1
- 241000863032 Trieres Species 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- MOFOBJHOKRNACT-UHFFFAOYSA-N nickel silver Chemical compound [Ni].[Ag] MOFOBJHOKRNACT-UHFFFAOYSA-N 0.000 description 1
- 239000010956 nickel silver Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
-
- 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
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Slide Fasteners (AREA)
Abstract
Provided is a Cu-Zn alloy which has a high Zn content, can be cold-worked, and has high strength and superior season cracking resistance. A cold-worked Cu-Zn alloy containing at least 10% Zn is subjected to at least one treatment selected among shot peening, shot blasting, sand blasting, and steel ball shot blasting; thus, the tensile residual stress on the surface of the alloy is reduced or brought into the state of compressive residual stress. The Cu-Zn alloy has a composition expressed by the general formula: CuaZnbXc (wherein X is at least one element selected among Al, Si, Sn, and Mn; and, by mass%, a is the balance, 10<b<=38, and 0<=c<3, provided the balance may include unavoidable elements).
Description
Technical field
The present invention relates to for example be applicable to the element, pull head of slide fastener, only buckle etc. or metal system button, taken ornament such as connecting piece, intensity and good zinc alloy at high proportion and the manufacture method thereof of prolonged resistance to cleavage.
Background technology
Existing slide fastener has used with red brass, brass with copper alloy and has been alloys such as the copper zinc alloy of representative or nickel silver alloy.As the zinc of the alloying element that is used for these alloys, because solid solution has the effect that increases alloy strength, hardness, homogeneous deformation amount.In addition, zinc is because than copper cheapness, so can obtain the cheap again alloy of superperformance.
But because the existence of zinc element in copper, and the problem of the remarkable deterioration of the solidity to corrosion of making is arranged, use the bigger copper alloy of zinc ratio, particularly make under the situation of slide fastener planting dress on the base fabric, produced the problem of the prolonged crackle that causes by residual machining deformation by cold working.
Prolonged crackle is morely in the alloy to see at Cu-Zn, particularly contains Zn greater than 10%, prolonged crackle rapid deterioration.
In order to improve the prolonged resistance to cleavage that Cu-Zn is an alloy, the ratio of considering zinc is below 10%, but since such alloy not only price height but also intensity also become not enough, so do not wish to be used for the slide fastener copper alloy.
The stress corrosion cracking problem that causes under stress corrosion by near the state of annealing the recrystallization temperature, keeping before thickization of recrystallize grain, can significantly be improved; In addition, borrow the various elements that add trace, can prolong the life-span of stress corrosion cracking, the report of this respect was once arranged.
For example, recording and narrating in patent documentation 1 has, and chilling after the Cu-Zn alloy components of cold plasticity processing is annealed under 200～300 ℃ of temperature makes on the surface of alloy components and produces compressive residual stress, can improve anti-stress-corrosion crack performance thus.
But in the aforesaid method that prevents stress corrosion cracking by annealing,, in addition, also be difficult to use and plant above the element that is loaded on the such zipper strip of slide fastener goods etc. owing to must thermal treatment causing that the strength of materials reduces.
Under the situation that the state that produces distortion uses,, probably also almost do not solve the effective means of the prolonged crackle that is produced even without producing bearing strength test by environment for use.
Patent documentation 1: Japanese Patent Publication 60-17822 communique.
Summary of the invention
But purpose of the present invention promptly is to be provided at cold working and intensity height and good copper-Zn based alloy and the manufacture method thereof of prolonged resistance to cleavage in the copper alloy that contains a high proportion of zinc.
Above-mentioned problem can be solved by having the present invention who constitutes as described below.
(1) manufacture method of the good copper zinc alloy of a kind of prolonged resistance to cleavage is characterised in that: to having carried out the cold worked zinc that contains at least greater than 1% copper zinc alloy, reduce the stretching unrelieved stress of this alloy surface or make it become the processing of compressive residual stress state.
(2) by the manufacture method of the good copper zinc alloy of above-mentioned (1) described prolonged resistance to cleavage, it is characterized in that aforementioned processing is selected at least a from shot peening, shot-peening, sandblast and injection steel ball.
Above-mentioned (1) or (2) the good Cu-Zn of described prolonged resistance to cleavage is in the manufacture method of alloy, it is characterized in that, aforementioned Cu-Zn is that alloy has with general expression and is: (X is optional at least a element from Al, Si, Sn, Mn to CuaZnbXc, a, b, c are mass percents, a is a surplus, 10＜b≤38,0≤c＜3 can comprise inevitable element) represented composition.
(4) the good Cu-Zn of prolonged resistance to cleavage that is recorded and narrated in aforementioned (1) or (2) is the manufacture method of alloy, it is characterized in that, aforementioned Cu-Zn is that alloy has with the general expression is that (X is an optional at least a element from Al, Si, Sn, Mn to CuaZnbXc, a, b, c are mass percents, a is a surplus, inevitable element can be contained in 25＜b≤38,0≤c＜3) represented composition.
(5) the good Cu-Zn of prolonged resistance to cleavage by each manufacture method manufacturing of recording and narrating in above-mentioned (1)～(4) is an alloy.
(6) Japan stretch stipulate among the copper technology association criterion JBMA-T301 through the time crack test in, even after exposing 2 hours, also not producing the good Cu-Zn of prolonged resistance to cleavage prolonged crackle, that recorded and narrated in above-mentioned (5) is alloy.
(7) stretch in the prolonged crack test of copper technology association criterion JBMA-T301 defined in aforementioned Japan, after exposing in maximum 12 hours, the good Cu-Zn of prolonged resistance to cleavage that product strength slippage (%) is recorded and narrated less than 10% above-mentioned (5) is an alloy.
(8) each good Cu-Zn of prolonged resistance to cleavage that records and narrates is the constituent part of the slide fastener of alloy formation in above-mentioned (5)～(7).
Description of drawings
Fig. 1 is the concept map of slide fastener.
Fig. 2 be explanation under installing on the slide fastener, buckle with onlying and on the figure of the method for only buckleing.
Embodiment
Bottom illustrates that the good Cu-Zn of prolonged resistance to cleavage of the present invention is an alloy.
The reason that produces prolonged crackle has three of alloy composition, corrosive environment and stretching unrelieved stresss.
As previously mentioned, we know that prolonged crackle is to see in the alloy at Cu-Zn more, and particularly as containing the Zn amount more than 10%, prolonged crackle can rapid deterioration.
Particularly under the situation with composition of representing with following formula: the Cu-Zn alloy has general expression: (X is an optional at least a element among Al, Si, Sn, the Mn to CuaZnbXc, a, b, c are mass percent, a is a surplus, 10＜b≤38,0≤c＜3, can contain inevitable element) during represented composition, cause prolonged crackle easily, be particularly remarkable under the situation of 25＜b≤38 at aforementioned b.
The stretching unrelieved stress is by the unequal generation of cold worked viscous deformation, but to borrow the control material surface residual stress be zero or be controlled to be compressive residual stress, in aforementioned such alloy composition, also can improve prolonged resistance to cleavage.
As the method for the unrelieved stress that reduces to stretch, can enumerate and give bump to material surface and cause case hardening process such as case-hardened shot peening, shot-peening, sandblast, injection steel ball.Because such surface hardening operation, can form viscous deformation at the upper layer that cold working produced above yield-point, reduce by the stretching unrelieved stress that cold working produced, or the controlled compressive residual stress that is made as.
Be used to make under the situation of slide fastener goods, by carrying out the resulting crepe weave form of aforementioned surfaces cure operations, the effect of the appearance design that can improve the slide fastener goods being arranged.
Material as the medium that is used for shot peening mainly can be lifted glass, sand, steel ball, pottery etc., and it is spherical that its shape is preferably.Having under the situation of corner angle and must use by rounding.Because corner angle injure machined material, have become the reason of surface imperfection.
In addition, under the situation that is used for the slide fastener goods, the homogeneity of the pears ginned cotton line of the slide fastener surface that is obtained by shot peening is damaged, and forms the scar that causes that sliding resistance increases.
The median size that is used for the medium of shot peening processing is preferably in the scope of 10 μ m～2000 μ m.Less than 10 μ m then are not enough to lower the stretching unrelieved stress, and then the surfaceness change is big if surpass 2000 μ m conversely.
Under the situation that is used for the slide fastener goods, the particle diameter of medium that is used for shot peening by the chap of the resulting wrinkle form of shot peening (curing system), not only damages manufacturability, and has also increased sliding resistance because surfaceness increases if surpass 2000 μ m.
The velocity of projection of shot peening medium is preferably in the scope of 10～150m/s.Depend on speed owing to put on the merit of machined material, then be not enough to reduce the stretching unrelieved stress, then be difficult to constitute grenade instrumentation as surpassing the upper limit, and cause medium fragmentation etc. easily so speed does not reach lower limit.
In addition, because alloy organizing of the present invention is that α is mutually single-phase, can provide high duty alloy by its cold-workability.
The projection time of shot peening is preferably in the scope of 1～60s.
If discontented aforementioned lower limit, whole material surface is difficult to complete covering, and as having surpassed the aforementioned upper limit, the truncation quantitative change on surface is big, and product size significantly reduces.
In addition, be used under the situation of slide fastener,, can not making whole material become uniform pears ginned cotton line, and as surpassing the aforementioned upper limit, owing to truncate, the size decreases of zipper teeth causes that intensity reduces, the sliding resistance increase as the aforementioned lower limit of deficiency.
The following accompanying drawing of borrowing specifies slide fastener as alloy use of the present invention.
Fig. 1 is the concept map of slide fastener, as shown in Figure 1, slide fastener constitutes by following all: form the element 3 that clips fixing (installation) on a pair of zipper strip 1,1 of core 2 and the core 2 at zipper strip 1 in accordance with regulations at interval at a side, be fixedly linked in the top and bottom of element 3 on the core 2 of zipper strip 1 on only buckle 4 with only buckle 5 down, be disposed at 3 of relative a pair of elements, for making element 3 interlocks and leaving the pull head 6 that direction up and down is free to slide.And, described in the above in, on the core 2 of zipper strip 1, load onto the chain 7 that element 3 promptly constitutes slide fastener.In addition, pull head 6 shown in Figure 1 is that the not shown rectangular parallelepiped that becomes the orthogonal tabular body to constitute by section is applied multistage pressure processing, and every predetermined distance cuts off, and is made into the pull head housing, loads onto spring and handle more as required.Handle also is to be the orthogonal tabular body, to be washed into the regulation shape by section, borrows it that pull head drawn back operation with the chain of a pair of slide fastener separately.
Fig. 2 is the element (component parts) 3 of expression slide fastener shown in Figure 1, upward only buckles the figure of 4 (component parts) and the method for only buckleing the manufacture method of 5 (component parts) down and installing on the core 2 of zipper strip 1.Among Fig. 2, the 8th, special-shaped line, the 9th, in conjunction with head, the 10th, shank, the 11st, rectangular lines, the 12nd, special-shaped line.
As shown in the figure, element 3 is roughly the special-shaped line 8 size cut-out in accordance with regulations that the Y font constitutes with section, its press working is shaped, forms in conjunction with head 9, then, borrows two shanks 10 are clipped on the core 2 that is installed on zipper strip 1.
Go up ending button and be section is that orthogonal rectangular lines 11 (parallel lines) is cut off every specified dimension, is shaped as section through bending machining and roughly becomes the コ font, then, clips on the core 2 that is installed on zipper strip 1.
Ending button down is roughly to be become the special-shaped line 12 of X-shaped to cut off every specified dimension by section, then, to clip on the core 2 that is installed on zipper strip 1.
In the drawings, element 3, only buckle 4,5 up and down and be loaded on simultaneously on the zipper strip 1, but be actually, element 3 is loaded on continuously the chain that on the zipper strip 1, at first makes slide fastener, take off the element of only buckleing the installation region 3 of slide fastener chain again, only buckle 4 or 5 near these regional element 3 installation provisions.
Be used in like this slide fastener element, only buckle, pull head, handle etc. carry out cold working more, therefore produce the stretching unrelieved stress, containing the many more slide fasteners of Zn, to produce prolonged crackle big more.
Therefore, in the operation of making and installing, with element, only buckle, pull head, handle etc. be loaded on zipper strip before or/and afterwards, by the residual stress control of carrying out shot peening, can be made into the good alloy of prolonged resistance to cleavage.
In the present invention, by making specific the forming of consisting of of Cu-Zn alloy, can reach purpose of the present invention, bottom describes each composition that constitutes alloy of the present invention.
Zn
To contain the many Cu-Zn of Zn in copper alloy be alloy, be easy to generate stress corrosion cracking or prolonged crackle under tensile stress and corrosive environment.Greater than 10%, alloy strength is increased as zinc content, but the susceptibility of prolonged crackle also uprise simultaneously by solution strengthening.Conversely, as zinc content below 10% or 10%, the undercapacity of alloy itself.As being to take the surface hardening measure on the alloy at the high brass of this prolonged crack sensitivity, prolonged crack performance can be improved greatly.In addition, as contain zinc more than 25% owing to can obtain abundant high strength as intensity and the work hardening of alloy, use present method to prevent that the intensity reduction that causes because of prolonged crackle is very effective.As containing zinc more than 38% or 38%, the formation of β phase is very remarkable, is difficult to carry out cold working and molded article shape.
X(Al、Si、Sn、Mn)
Al, Sn, Mn:Al and Sn and Mn improve the mechanical property of alloy by solution strengthening.But as,, can not guarantee sufficient cold-forming property because crystalline texture becomes the alpha+beta phase greater than 3%.
Si
Si forms stable oxide film from the teeth outwards, thereby the effect that improves the desired prolonged resistance to cleavage of slide fastener is arranged.But as more than 3% or 3%, crystal structure becomes the alpha+beta phase, can not guarantee sufficient cold-forming property.Alloy of the present invention, owing to be that α is mutually single-phase, so can guarantee enough cold-forming properties.
Embodiment
Embodiment 1～13
Use pure Cu (99.99%), pure Zn (99.9%), pure Al (99.9%), pure Si (99.9%), pure Sn (99.9%), pure Mn (99.9%) as starting material, weighing goes out the regulation shown in table 1 or the table 2 and forms.Put it in the aluminium crucible,, in the Copper casting mould of the φ 40mm that reinjects, make ingot bar in the fusing of argon gas medium-high frequency.The gained ingot bar is cut into 75mm length, become extrusion billet.Be squeezed under 530 ℃ of 800 ℃ of the blank temperatures, extrusion molding die body temperature and carry out, make the extruded material of φ 26mm.The gained extruded material carried out 800 ℃, 1 hour homogenization treatment.
Material after the resultant homogenization treatment is carried out turning processing, make the pole of φ 6mm, cold pressing again, added 80% calendering distortion (identical) with the deflection that is given when the element of shaping slide fastener to thick 1.2mm.Calendared sheet is made the tension test sheet by No. 7 test films of JIS Z 2201.To this test film, under table 1 and the condition of shot-peening shown in the table 2 with velocity of projection 60m/s from the rectangular four directions of relative test film parallel portion on distance 100mm to test film projection medium (メ デ イ ア).Projection time is got 20S.
The Japan that provides by JISH3300 stretches the prolonged crack test method of copper technology association criterion JBMA-T301 defined and carries out 2～12 hours ammonia exposure test.Test film after the exposure test has or not prolonged crackle by the surface observation evaluation, as does not find crackle marking zero, generation crackle marking *.By instron (Instron) type trier, under the ram speed of 1mm/s carry out tension test, estimate with the intensity reduction amount (%) before and after the exposure test thereafter.Evaluation result is shown in table 1.
Comparative example 1～7
Used same starting material among use and the embodiment, except that alloy composition shown in the table 2, the same test film made from embodiment.
To resulting test film under the condition of shot-peening shown in the table 2 after the projection medium, equally with embodiment carry out prolonged crack test.Evaluation result is shown in Table 2.
Table 1
| Alloying constituent (weight %) | The shot-peening condition | Prolonged crack test | |||||||||||||
| Embodiment | Cu | Zn | ??Al | ??Si | ??Sn | ??Mn | Have or not shot-peening | Surface residual stress | The medium material | Media particle size (μ m) | Exposure duration (h) | Flawless is arranged | Tensile strength (MPa) | ||
| Before the exposure | After the exposure | Reduction amount (%) | |||||||||||||
| ????1 | Surplus | 15.0 | ??- | ??- | ??- | ??- | Have | ??0 | Glass | ????20 | ????2 | ????○ | ??608 | ????608 | Remain stationary |
| ????2 | Surplus | 15.0 | ??- | ??- | ??- | ??- | Have | ??0 | Sand | ????20 | ????2 | ????○ | ??608 | ????608 | Remain stationary |
| ????3 | Surplus | 20.0 | ??- | ??- | ??- | ??- | Have | ??0 | Steel ball | ????20 | ????2 | ????○ | ??652 | ????652 | Remain stationary |
| ????4 | Surplus | 20.0 | ??- | ??- | ??- | ??- | Have | ??0 | Sand | ????20 | ????4 | ????○ | ??652 | ????652 | Remain stationary |
| ????5 | Surplus | 30.0 | ??- | ??- | ??- | ??- | Have | Compression | Glass | ????1000 | ????4 | ????○ | ??725 | ????725 | Remain stationary |
| ????6 | Surplus | 30.0 | ??- | ??- | ??- | ??- | Have | Compression | Steel ball | ????60 | ????8 | ????○ | ??725 | ????725 | Remain stationary |
| ????7 | Surplus | 30.0 | ??- | ??- | ??- | ??- | Have | Compression | Glass | ????60 | ????8 | ????○ | ??725 | ????725 | Remain stationary |
| ????8 | Surplus | 35.0 | ??- | ??- | ??- | ??- | Have | Compression | Steel ball | ????1000 | ????8 | ????○ | ??706 | ????706 | Remain stationary |
| ????9 | Surplus | 35.0 | ??- | ??- | ??- | ??- | Have | Compression | Sand | ????500 | ????8 | ????○ | ??706 | ????706 | Remain stationary |
| ????10 | Surplus | 30.0 | ??1.0 | ??- | ??- | ??- | Have | Compression | Sand | ????1000 | ????12 | ????× | ??743 | ????721 | ????3％ |
| ????11 | Surplus | 30.0 | ??- | ??0.5 | ??- | ??- | Have | Compression | Sand | ????1500 | ????12 | ????× | ??738 | ????701 | ????3％ |
| ????12 | Surplus | 35.0 | ??- | ??- | ??2.0 | ??- | Have | Compression | Steel ball | ????500 | ????12 | ????× | ??727 | ????705 | ????3％ |
| ????13 | Surplus | 35.0 | ??- | ??- | ??- | ??2.5 | Have | Compression | Glass | ????60 | ????12 | ????× | ??739 | ????702 | ????5％ |
Table 2
| Alloying constituent (weight %) | The shot-peening condition | Prolonged crack test | |||||||||||||
| Comparative example | Cu | Zn | ??Al | ??Si | ??Sn | ??Mn | Have or not shot-peening | Surface residual stress | The medium material | Media particle size (μ m) | Exposure duration (h) | Flawless is arranged | Tension test | ||
| Before the exposure | After the exposure | Reduction amount (%) | |||||||||||||
| ????1 | Surplus | 20.0 | ??- | ??- | ??- | ??- | Do not have | Stretch | - | ??- | ????8 | ??× | ??652 | ??515 | ????21％ |
| ????2 | Surplus | 30.0 | ??- | ??- | ??- | ??- | Do not have | Stretch | - | ??- | ????8 | ??× | ??725 | ??479 | ????34％ |
| ????3 | Surplus | 35.0 | ??- | ??- | ??- | ??- | Do not have | Stretch | - | ??- | ????8 | ??× | ??706 | ??409 | ????42％ |
| ????4 | Surplus | 30.0 | ??1.0 | ??- | ??- | ??- | Do not have | Stretch | - | ??- | ????12 | ??× | ??743 | ??349 | ????53％ |
| ????5 | Surplus | 35.0 | ??- | ??- | ??2.0 | ??- | Do not have | Stretch | - | ??- | ????12 | ??× | ??727 | ??232 | ????68％ |
| ????6 | 100.0 | - | ??- | ??- | ??- | ??- | Have | Compression | Glass | ??60 | ????12 | ??○ | ??362 | ??362 | Remain stationary |
| ????7 | Surplus | 5.0 | ??- | ??- | ??- | ??- | Have | Compression | Sand | ??500 | ????12 | ??○ | ??431 | ??431 | Remain stationary |
Evaluation result
Evaluation result for the prolonged crackle of material of the present invention, comparative example is to have produced crackle in comparative example 1～5.And with respect to this, material of the present invention does not all crack.
In addition from the result of the intensity reduction amount of determination test sheet, do not carry out the comparative example 1～5 that shot peening handles and illustrate, Zn content many intensity reduction amount more is big more, and does not almost have strength degradation among the present invention.Thus, kept high strength such as being used for the long-time use of warp under the various environment of slide fastener goods, we can say not producing prolonged crackle.
In comparative example 6,7, prolonged crackle does not take place, almost there is not strength degradation yet, but because Zn content low strength deficiency.To this, material of the present invention is no matter any intensity is all kept the high strength of 600～730MPa.Thus, material of the present invention is used for for example opening and closing slide fastener etc., owing to element applied the element of the certain high-intensity slide fastener of over-drastic load needs with the portion of button with onlying and only buckle under the situation of portion etc., material of the present invention can provide to these slide fastener goods has the good goods of necessary strength.
The present invention can provide material price cheap, through cold working such as shot peening reach high strength, prolonged resistance to cleavage good contain the high Cu-Zn alloy of zinc ratio, because the aforementioned cold working operation that is processed as, for example also applicable to the slide fastener elements pull head, end button etc. and plant the state that is loaded on zipper strip.
Claims (8)
1. the good Cu-Zn of prolonged resistance to cleavage is the manufacture method of alloy, it is characterized in that, cold worked to having carried out, to contain Zn amount at least be alloy greater than 10% Cu-Zn, reduce the stretching unrelieved stress of this alloy surface or make it become the processing of compressive residual stress state.
2. be the manufacture method of alloy according to the good Cu-Zn of the described prolonged resistance to cleavage of claim 1, it is characterized in that aforementioned processing is at least a for what select from shot peening, shot-peening, sandblast and injection steel ball.
3. be the manufacture method of alloy according to claim 1 or the good Cu-Zn of 2 described prolonged resistance to cleavages, it is characterized in that, aforementioned Cu-Zn is that alloy has with general expression and is: (X is at least a element of selecting among Al, Si, Sn, the Mn to CuaZnbXc, a, b, c are mass percents, a is a surplus, 10＜b≤38,0≤c＜3 can contain inevitable element) represented composition.
4. be the manufacture method of alloy by claim 1 or the good Cu-Zn of 2 described prolonged resistance to cleavages, it is characterized in that, aforementioned Cu-Zn is that alloy has with general expression and is: (X is at least a element of selecting among Al, Si, Sn, the Mn to CuaZnbXc, a, b, c are mass percents, a is a surplus, 25＜b≤38,0≤c＜3 can contain inevitable element) represented composition.
5. the good Cu-Zn of prolonged resistance to cleavage is an alloy, it is characterized in that, forms by the described manufacture method manufacturing of claim 1.
6. be alloy according to the good Cu-Zn of the described prolonged resistance to cleavage of claim 5, it is characterized in that, stretch in the prolonged crack test of copper technology association criterion JBMA-T301 regulation, expose and also do not produce prolonged crackle after 2 hours in Japan.
7. be alloy by the good Cu-Zn of the described prolonged resistance to cleavage of claim 5, it is characterized in that stretch in the test of copper technology association criterion JBMA-T301 regulation in aforementioned Japan, maximum after exposing 12 hours, product strength reduction amount is in 10%.
8. the constituent part of a slide fastener is characterized in that, good Cu-Zn is that alloy is made by the described prolonged resistance to cleavage of claim 5.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP126292/2003 | 2003-05-01 | ||
| JP2003126292A JP4357869B2 (en) | 2003-05-01 | 2003-05-01 | A method for producing a Cu-Zn alloy having excellent time cracking resistance. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1542150A true CN1542150A (en) | 2004-11-03 |
| CN1250757C CN1250757C (en) | 2006-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101202182A Expired - Lifetime CN1250757C (en) | 2003-05-01 | 2003-12-09 | Cu-Zn system alloy with good of durable crack resistant performance and manufacturing method thereof |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4357869B2 (en) |
| KR (1) | KR20040094593A (en) |
| CN (1) | CN1250757C (en) |
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| WO2010034186A1 (en) * | 2008-09-29 | 2010-04-01 | Zhu Junsheng | A brass alloy used for producing distributor of air conditioner |
| CN102534295A (en) * | 2011-11-21 | 2012-07-04 | 宁波三旺洁具有限公司 | Anticorrosion boron copper alloy |
| CN102959108A (en) * | 2010-07-05 | 2013-03-06 | Ykk株式会社 | Copper-zinc alloy product and process for producing copper-zinc alloy product |
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| WO2011077567A1 (en) * | 2009-12-25 | 2011-06-30 | Ykk株式会社 | Zipper component and slide zipper, and method for producing zipper component |
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-
2003
- 2003-05-01 JP JP2003126292A patent/JP4357869B2/en not_active Expired - Lifetime
- 2003-10-24 KR KR1020030074530A patent/KR20040094593A/en not_active Application Discontinuation
- 2003-12-09 CN CNB2003101202182A patent/CN1250757C/en not_active Expired - Lifetime
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Also Published As
| Publication number | Publication date |
|---|---|
| JP4357869B2 (en) | 2009-11-04 |
| JP2004332014A (en) | 2004-11-25 |
| KR20040094593A (en) | 2004-11-10 |
| CN1250757C (en) | 2006-04-12 |
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