USRE19915E - Die casting alloy - Google Patents
Die casting alloy Download PDFInfo
- Publication number
- USRE19915E USRE19915E US19915DE USRE19915E US RE19915 E USRE19915 E US RE19915E US 19915D E US19915D E US 19915DE US RE19915 E USRE19915 E US RE19915E
- Authority
- US
- United States
- Prior art keywords
- alloy
- die casting
- approximately
- silicon
- copper
- 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.)
- Expired
Links
- 229910045601 alloy Inorganic materials 0.000 title description 22
- 239000000956 alloy Substances 0.000 title description 22
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 title description 19
- 238000004512 die casting Methods 0.000 title description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 15
- 229910052710 silicon Inorganic materials 0.000 description 15
- 239000010703 silicon Substances 0.000 description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 13
- 229910052802 copper Inorganic materials 0.000 description 13
- 239000010949 copper Substances 0.000 description 13
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 12
- 229910052725 zinc Inorganic materials 0.000 description 12
- 239000011701 zinc Substances 0.000 description 12
- 229910052718 tin Inorganic materials 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- ATJFFYVFTNAWJD-UHFFFAOYSA-N tin hydride Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 7
- 238000005266 casting Methods 0.000 description 6
- 238000002844 melting Methods 0.000 description 5
- 229910001369 Brass Inorganic materials 0.000 description 4
- 239000010951 brass Substances 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 241001519451 Abramis brama Species 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-AHCXROLUSA-N copper-60 Chemical group [60Cu] RYGMFSIKBFXOCR-AHCXROLUSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
Definitions
- This invention relates to a die casting alloy. and has for an object to produce an alloy which gives a much better smoother surface on the casting that doesn't require machining, sand blasting or other finishing operations.
- Another object is to provide an alloy which flows readily into the recesses of the die so as to reduce to'a minimum the casting of defective castings, and also to permit satisfactory casting of more complicated castings.
- the lowestmelting point brass is the alloy of approximately 60% copper and 40% zinc. If we use alloys of much higher melting temperatures we run into difllculties as higher temperatures reduce the life of the dies.
- silicon may be in amount from approximately .05% to .5% and preferably from approximately 0.1% to 0.15%.
- the addition of this amount of silicon gives a much better smoother surface to the die casting, and one that does not require machining, sand blasting or other finishing operations. It also makes the metal flow better into the recesses of the die giving more perfect castings and permitting casting of more complicated castings.
- silicon material ly improves the surface condition beyond that obtained by the use of tin. It increases the fluidity of the brass somewhat and tends to reduce drossing, that is tends to reduce deposit of zinc oxide on the die surfaces.
- the lead used is generally about 1% of the alloy, but may vary from approximately .25% to 3%. It is also desirable to Jerusalem the lead to segre ate in the pot and to give better fluidity to the alloy. It also increases corrosion resistance.
- the tinis generally about 1% ofthe alloy but may vary from approximately 25% to 3%.
- Zinc has a relatively low melting point. "That is, it has a high vapor tension at the melting temperature of brass so it tends to vaporize and form clouds ofsincoxidaandtoformdrcesontopofthe melted metal as it is ladled out. the characteristic of forming a very fll t aluactl to prevmt oxidation of the underlying metal.
- Thealuminumthereforereducesthennc add a small amount of tin as it inhibits or re- It is still further desirable to add a small amount Aluminumbasminumoxidefllm'overthetopoftheliguidand Application for rei-ue February 14,. 1980. Serial No. 08,088
- the aluminum may be from approximately .05% to 5 1% and preferably about 0.1%.
- a general composition of copper 60%, lead 1%, tin 1% and remainder zinc is also old, but I have found that the addition 0! silicon from approximately .05% to 5% to these alloys gives the improved characteristics as above described, particularly fo'r die-castings, that is it increases the fluidity of the alloy, reduces oxidation, particul6 larly of the zinc, and gives a much superior sur- I face to the resulting casting.
- the preferred'silicon content is from approximately 0.1% to 0.15%.
- the improvementsecured by the addition of silicon is not confined to an alloy of approximately 60% copper and 40% zinc, but for die casting it is desirable to keep the copper about 60%, say from about 59% to about 61%, as alloys today for die casting are limited to those of relatively low melting points because of the limitations of die steels at present commercially available.
- my, tests have shown that a similar use of silicon in brasses of higher copper content gives similar results. With increasing copper content the silicon content may be increased if desired in proportion of the coeflicient of equivalents of silicon to zinc.
- Brasses with a copper content of approximately 55% to 75% can be die cast but at the present time the die casting of the high copper brasses is not commercially practical because of their relatively high melting points and consequent shortened life of metallic dies, generally steel dies, used in the die casting process. It would not be advisable to go 40 above about 43% zinc figured by equivalents.
- a specific die casting alloy which is very satistactory is approximately the following:
- a die casting alloy characterized by superior fluidity and superior surface finish in the as cast condition comprising approximately 55% to 75% copper, lead from 25% to 3%,tin from 25% to 3%, aluminum from .05% to 1%, silicon from .05% to 5%, and balance zinc.
- a die castingv alloy characterized by superiorfluidity and superior surface finish in the as cast condition comprising approximately 59% to 61% copper, .5% to 1.5% tin. .5% to 1.5% lead, .05% to .15% aluminum, .1% to 2% silicon, and balance zinc.
- a die casting alloy characterised by' superior fluidity and superior surface flnish in the as cast condition comprising approximately 60% copper, 1% lead, 1% tin, .1% aluminum, .05% to .5% silicon, and balance zinc.
- a die casting alloy characterized by superior fluidity and superior surface flnish in the as cast condition comprising approximately 60% copper, 37.75% zinc, 1% lead, 1% tin, 0.15% silicon, and 0.10% aluminum.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
Reissued Apr. 7, 1936 10.015 nn: css'rmo ALLOY John B. Freeman, In, Cheshire, 04mm, amignor to The American Brass Company, Waterbury, Com, a corporation of Connecticut No Drawing. Ol'lg'llIl-I N0. 323,129, dated December 3, 1.85, Serial- No. 748,113, October 13,
This invention relates to a die casting alloy. and has for an object to produce an alloy which gives a much better smoother surface on the casting that doesn't require machining, sand blasting or other finishing operations.
Another object is to provide an alloy which flows readily into the recesses of the die so as to reduce to'a minimum the casting of defective castings, and also to permit satisfactory casting of more complicated castings.
Other objects and improved results will become apparent as the description proceeds.
The lowestmelting point brass is the alloy of approximately 60% copper and 40% zinc. If we use alloys of much higher melting temperatures we run into difllculties as higher temperatures reduce the life of the dies.
I have discovered that the addition of a small amount of silicon to lxasses in'the neighborhood of the 60-40 alloy gives a much better surface condition to a die casting of this alloy. The silicon may be in amount from approximately .05% to .5% and preferably from approximately 0.1% to 0.15%. The addition of this amount of silicon gives a much better smoother surface to the die casting, and one that does not require machining, sand blasting or other finishing operations. It also makes the metal flow better into the recesses of the die giving more perfect castings and permitting casting of more complicated castings. In short silicon materially improves the surface condition beyond that obtained by the use of tin. It increases the fluidity of the brass somewhat and tends to reduce drossing, that is tends to reduce deposit of zinc oxide on the die surfaces.
It is desirable to add asmall amoimt oi lead to these alloys when used for die casting as the lead keeps it plastic and suitable for casting over a longer range of temperature. It also improves its machinability. The lead used is generally about 1% of the alloy, but may vary from approximately .25% to 3%. It is also desirable to duces the tendency of the lead to segre ate in the pot and to give better fluidity to the alloy. It also increases corrosion resistance. The tinis generally about 1% ofthe alloy but may vary from approximately 25% to 3%.
of aluminum for the following reasons. Zinc has a relatively low melting point. "That is, it has a high vapor tension at the melting temperature of brass so it tends to vaporize and form clouds ofsincoxidaandtoformdrcesontopofthe melted metal as it is ladled out. the characteristic of forming a very fll t aluactl to prevmt oxidation of the underlying metal. Thealuminumthereforereducesthennc add a small amount of tin as it inhibits or re- It is still further desirable to add a small amount Aluminumbasminumoxidefllm'overthetopoftheliguidand Application for rei-ue February 14,. 1980. Serial No. 08,088
drosslng in the holding pot, and reduces the zinc oxide and copper oxide which is likely to be entrapped inthecasting tomake itunsound. The aluminum may be from approximately .05% to 5 1% and preferably about 0.1%. a
The general composition of copper approximately 60% and zinc 40% is of course well known.
A general composition of copper 60%, lead 1%, tin 1% and remainder zinc is also old, but I have found that the addition 0! silicon from approximately .05% to 5% to these alloys gives the improved characteristics as above described, particularly fo'r die-castings, that is it increases the fluidity of the alloy, reduces oxidation, particul6 larly of the zinc, and gives a much superior sur- I face to the resulting casting. As stated above the preferred'silicon content is from approximately 0.1% to 0.15%.
The improvementsecured by the addition of silicon is not confined to an alloy of approximately 60% copper and 40% zinc, but for die casting it is desirable to keep the copper about 60%, say from about 59% to about 61%, as alloys today for die casting are limited to those of relatively low melting points because of the limitations of die steels at present commercially available. However, my, tests have shown that a similar use of silicon in brasses of higher copper content gives similar results. With increasing copper content the silicon content may be increased if desired in proportion of the coeflicient of equivalents of silicon to zinc. Brasses with a copper content of approximately 55% to 75% can be die cast but at the present time the die casting of the high copper brasses is not commercially practical because of their relatively high melting points and consequent shortened life of metallic dies, generally steel dies, used in the die casting process. It would not be advisable to go 40 above about 43% zinc figured by equivalents.
An alloy range I have found very satisfactory in die casting is approximately the following:
A specific die casting alloy which is very satistactory is approximately the following:
Per cent Copper 60.00 zinc- 37.75 Lead 1.00 Tin 1.00 Silicon 0.15 Aluminum 0,10 00 Having thus set forth the nature of my invention, what I claim is:
1. A die casting alloy characterized by superior fluidity and superior surface finish in the as cast condition comprising approximately 55% to 75% copper, lead from 25% to 3%,tin from 25% to 3%, aluminum from .05% to 1%, silicon from .05% to 5%, and balance zinc.
2. A die castingv alloy characterized by superiorfluidity and superior surface finish in the as cast condition comprising approximately 59% to 61% copper, .5% to 1.5% tin. .5% to 1.5% lead, .05% to .15% aluminum, .1% to 2% silicon, and balance zinc. p
3. A die casting alloy characterised by' superior fluidity and superior surface flnish in the as cast condition comprising approximately 60% copper, 1% lead, 1% tin, .1% aluminum, .05% to .5% silicon, and balance zinc. p
4. A die casting alloy characterized by superior fluidity and superior surface flnish in the as cast condition comprising approximately 60% copper, 37.75% zinc, 1% lead, 1% tin, 0.15% silicon, and 0.10% aluminum. A V
e JOHN R. Jr.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| USRE19915E true USRE19915E (en) | 1936-04-07 |
Family
ID=2084424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US19915D Expired USRE19915E (en) | Die casting alloy |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | USRE19915E (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3404977A (en) * | 1965-12-09 | 1968-10-08 | American Standard Inc | Brass alloy |
| US4205984A (en) | 1978-06-28 | 1980-06-03 | Olin Corporation | Modified brass alloys with improved stress relaxation resistance |
| US4417929A (en) | 1980-09-11 | 1983-11-29 | Kitz Corporation | Special brass with dezincification corrosion resistance |
| US5507885A (en) * | 1994-01-17 | 1996-04-16 | Kitz Corporation | Copper-based alloy |
-
0
- US US19915D patent/USRE19915E/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3404977A (en) * | 1965-12-09 | 1968-10-08 | American Standard Inc | Brass alloy |
| US4205984A (en) | 1978-06-28 | 1980-06-03 | Olin Corporation | Modified brass alloys with improved stress relaxation resistance |
| US4417929A (en) | 1980-09-11 | 1983-11-29 | Kitz Corporation | Special brass with dezincification corrosion resistance |
| US5507885A (en) * | 1994-01-17 | 1996-04-16 | Kitz Corporation | Copper-based alloy |
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