JP2004537652A - Spheroidal graphite cast iron with high strength and ductility and transmission case produced therefrom - Google Patents
Spheroidal graphite cast iron with high strength and ductility and transmission case produced therefrom Download PDFInfo
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- JP2004537652A JP2004537652A JP2003519535A JP2003519535A JP2004537652A JP 2004537652 A JP2004537652 A JP 2004537652A JP 2003519535 A JP2003519535 A JP 2003519535A JP 2003519535 A JP2003519535 A JP 2003519535A JP 2004537652 A JP2004537652 A JP 2004537652A
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- JP
- Japan
- Prior art keywords
- cast iron
- spheroidal graphite
- graphite cast
- case
- high strength
- 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
- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 19
- 230000005540 biological transmission Effects 0.000 title description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 9
- 239000010703 silicon Substances 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 5
- 239000011574 phosphorus Substances 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 3
- 229910000760 Hardened steel Inorganic materials 0.000 claims abstract description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 8
- 230000013011 mating Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910001562 pearlite Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- -1 [0002] Of these Chemical compound 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Details Of Gearings (AREA)
- Gears, Cams (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
改良された球状黒鉛鋳鉄は、高い強度にもかかわらず、靭性で、よく加工可能でかつ溶接可能でなければならない。球状黒鉛鋳鉄は、４〜６％の珪素及び炭素当量に応じて減少される炭素の割合、最大０．０３％の燐及び０．２〜０．５％のニッケルを含んでいる。これから成るケース（１）は、合金鋼及び／又は肌焼鋼から成る歯切り部材（２）に溶接されている。The improved spheroidal graphite cast iron must be tough, well workable and weldable despite its high strength. Spheroidal graphite cast iron contains 4-6% silicon and the proportion of carbon reduced as a function of carbon equivalent, up to 0.03% phosphorus and 0.2-0.5% nickel. The case (1) made of this is welded to a gear cutting member (2) made of alloy steel and / or case-hardened steel.
Description
【０００１】
本発明は、強く荷重をかけられる鋳造部材のために通常使用されるような、例えばＤＩＮ又はＳＡＥ（角かっこ内）による材料のような、珪素を合金化される
ａ）ＥＮ−ＧＪＳ−４００−１６［Ｄ４０１８］
ｂ）ＥＮ−ＧＪＳ−５００− ７［Ｄ４５１２］
ｃ）ＥＮ−ＧＪＳ−６００− ３［Ｄ５６０８］
ｄ）ＥＮ−ＧＪＳ−７００− ２［Ｄ７００３］
による材料のような、珪素を合金化される球状黒鉛鋳鉄に関する。
【０００２】
これらのうち第１（ａ）はまだフエライトであり、従って靭性であるが、その強度は中位であるにすぎない。強度がもっと高くなるようにする場合、著しく低下する靭性及び溶接可能性で、順にフエライト−パーライトないし純パーライトである材料ｂ），ｃ）及びｄ）を取る。これらの材料は、ａ）からｄ）まで増大する程度に、局部的に異なる組成の多相（フエライト−パーライト）基本組織を持ち、このことは、鋳造の際不可避な局部的に異なる冷却条件により更に強められ、後続の特に切削加工の際問題になる。従ってその使用は特別な使用に限られている。
【０００３】
車両製造において、重量の減少は特別な関心事であり、このことは、小さい肉厚の鋳造部材において、高い強度、ただし靭性及び良好な加工性も必要とする。その場合約１０％だけ重い鋼を使用する必要がある。
【０００４】
車両製造において、高い耐熱性を必要とする使用のため、高い含有量の珪素及び０．５〜２％のモリブデンを持つ球状黒鉛鋳鉄を使用することが公知である。しかしこれは非常にもろく、その上加工困難である。
【０００５】
従って本発明の課題は、高い強度にもかかわらず靭性で、よく加工可能で溶接可能であるように、球状黒鉛鋳鉄を改良することである。
【０００６】
本発明による球状黒鉛鋳鉄は、４〜６％の珪素及び炭素当量に応じて減少される炭素の割合、最大０．０３％の燐及び０．２〜０．５％のニッケルを含んでいる。珪素の高い含有量はフエライトを安定化するように作用し、強度も高める。炭素当量は炭素含有量の適当な低下を必要とする。燐は、それにより形成される化合物の固溶硬化のため、もろくするように作用するので、燐含有量はできるだけ小さくせねばならない。ニッケルも脆性を減少しかつ強度を増大し、必要な割合は、それにより生じる超過費用を無視できるほど小さい。
【０００７】
ここで強度は、従来技術による球状黒鉛鋳鉄におけるように、比較的高い含有量のパーライトを介して得られるのではなく、固溶硬化によって得られる。この手段の共同作用により、良好な延性及び溶接可能性で、著しい強度増大が行われる。
【０００８】
特に良好な値が得られた量比は、請求項２及び３によれば、珪素が４．１〜４．５％、ニッケルが０．２５〜０．３５％である。普通の程度より下に含有量を限定すると、銅がパーライト形成材であるため、本発明による手段の作用が強められる。
【０００９】
最後に本発明は、先行する請求項の１つに記載の球状黒鉛鋳鉄から成るケース特に伝動装置ケースに関する。このような伝動装置ケースは、本発明により改良される球状黒鉛鋳鉄の高い強度のため、一層薄肉であり、かつ一層軽い。接続フランジ及び軸受座の形成のために必要な切削加工は、制限されることなく可能である。
【００１０】
更に本発明による材料から成る伝動装置ケースは、合金鋼及び／又は肌焼鋼から成る歯切り部材に溶接されていることができる。
【００１１】
本発明は表及び図により以下に説明される。
【００１２】
図１において、最初の４つの欄にあって上記のａ）〜ｄ）による従来技術による材料の性質が、第５欄にあって本発明により改良された材料の性質に対照されている。数字及び表示は自明であり、明細書の最初に述べたことを裏づけている。
【００１３】
例として第５欄の材料の分析が図１に従っている。示された百分率は、１つのチャージの複数の鋳片からの平均値である。
図２には、ケース例えば伝動装置のケースが１で、またこれと１つの構造部分となるように結合される歯車が２で示されている。ここでケース１は本発明により改良された球状黒鉛鋳鉄から成っている。歯車２は鋼から成り、肌焼されている。ケース１は、軸線に対して直角に溶接すべき第１の面３を持ち、外側の円筒状はめ合い面５を形成する円筒状カラー４がこの面３に続いている。ケース１は、大きい肉厚の個所に、溶接すべき第１の面に対して平行に延びる丸い断面の周囲溝６を備えている。歯車２に、軸線に対して直角な面内にある溶接すべき第２の面７と、円筒状はめ合い面５上に載る円筒状はめ合い面８が設けられている。
【００１５】
円筒状はめ合い面８は、溶接すべき第２の面７への移行部の所で引込められているので、拡張部９が形成される。この拡張部は、製造及びカラー４上への歯車２の押しはめを容易にし、必要な場合には根元の底部溶け込みを改善する。１８で部材の回転軸線が示され、２０で溶接ヘッドが示されている。
【図面の簡単な説明】
【００１６】
【図１】従来技術による球状黒鉛鋳鉄と本発明により改良された球状黒鉛鋳鉄との対照を示す。
【図２】本発明による伝動装置ケースの断面を示す。[0001]
The present invention relates to silicon alloys, such as materials according to DIN or SAE (inside square brackets), as commonly used for heavily loaded cast parts a) EN-GJS-400- 16 [D4018]
b) EN-GJS-500-7 [D4512]
c) EN-GJS-600-3 [D5608]
d) EN-GJS-700-2 [D7003]
Relates to spheroidal graphite cast iron alloyed with silicon, such as
[0002]
Of these, the first (a) is still ferrite and thus tough, but its strength is only moderate. For higher strength, take materials b), c) and d) in order of ferrite-perlite or pure pearlite in order of significantly reduced toughness and weldability. These materials have a multiphase (ferrite-perlite) basic structure with locally different compositions to the extent that they increase from a) to d), which is due to locally different cooling conditions that are inevitable during casting. Further strengthened, it becomes a problem in the subsequent cutting process. Therefore, its use is limited to special use.
[0003]
Weight reduction is a particular concern in vehicle manufacturing, which also requires high strength, but toughness and good workability in small wall cast parts. In that case, it is necessary to use steel that is about 10% heavier.
[0004]
In the manufacture of vehicles, it is known to use spheroidal graphite cast iron with a high content of silicon and 0.5-2% molybdenum for use requiring high heat resistance. However, this is very fragile and difficult to process.
[0005]
The object of the present invention is therefore to improve the spheroidal graphite cast iron so that it is tough, well workable and weldable despite its high strength.
[0006]
Spheroidal graphite cast iron according to the present invention contains 4-6% silicon and a proportion of carbon reduced as a function of carbon equivalent, a maximum of 0.03% phosphorus and 0.2-0.5% nickel. A high content of silicon acts to stabilize ferrite and increases strength. Carbon equivalent requires an appropriate reduction in carbon content. Phosphorus acts to make it brittle because of the solid solution hardening of the compounds formed thereby, so the phosphorus content must be as small as possible. Nickel also reduces brittleness and increases strength, and the required proportion is so small that the excess costs caused thereby are negligible.
[0007]
Here, the strength is not obtained through a relatively high content of pearlite, as in spheroidal graphite cast iron according to the prior art, but by solid solution hardening. The combined action of this means results in a significant increase in strength with good ductility and weldability.
[0008]
According to
[0009]
Finally, the invention relates to a case, in particular a transmission case, made of spheroidal graphite cast iron according to one of the preceding claims. Such a transmission case is thinner and lighter due to the high strength of the spheroidal graphite cast iron improved by the present invention. The cutting necessary for the formation of the connecting flange and the bearing seat is possible without limitation.
[0010]
Furthermore, the transmission case made of the material according to the invention can be welded to a gearing member made of alloy steel and / or case-hardened steel.
[0011]
The invention is explained below by means of tables and figures.
[0012]
In FIG. 1, the material properties according to the prior art according to a) to d) above in the first four columns are contrasted with the material properties improved according to the invention in the fifth column. The numbers and labels are self-explanatory and support what was stated at the beginning of the specification.
[0013]
As an example, the analysis of the material in column 5 follows FIG. The percentages shown are average values from multiple slabs of one charge.
In FIG. 2, a case, for example, a case of a transmission device is indicated by 1, and a gear connected to the case so as to be one structural part is indicated by 2. Here, the case 1 is made of spheroidal graphite cast iron improved according to the present invention. The gear 2 is made of steel and is case-hardened. Case 1 has a
[0015]
Since the
[Brief description of the drawings]
[0016]
FIG. 1 shows a contrast between prior art spheroidal graphite cast iron and spheroidal graphite cast iron improved according to the present invention.
FIG. 2 shows a cross section of a transmission case according to the invention.
Claims (6)
ａ）４〜６％の珪素及び炭素当量に応じて減少される炭素の割合、
ｂ）最大０．０３％の燐及び
ｃ）０．２〜０．５％のニッケル
を含んでいることを特徴とする、球状黒鉛鋳鉄。
る、通報装置。Spheroidal graphite cast iron alloyed with silicon a) 4-6% silicon and the proportion of carbon reduced according to carbon equivalents,
Spheroidal graphite cast iron characterized in that it contains b) up to 0.03% phosphorus and c) 0.2-0.5% nickel.
Informing device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0062301U AT5381U1 (en) | 2001-08-07 | 2001-08-07 | SPHERICAL CASTING OF HIGH STRENGTH AND DUCTILITY AND TRANSMISSION CASE MADE THEREOF |
| PCT/AT2002/000234 WO2003014407A1 (en) | 2001-08-07 | 2002-08-02 | High-strength, high-ductility nodular iron, and transmission housing produced therefrom |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2004537652A true JP2004537652A (en) | 2004-12-16 |
| JP2004537652A5 JP2004537652A5 (en) | 2005-11-17 |
Family
ID=3495482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003519535A Pending JP2004537652A (en) | 2001-08-07 | 2002-08-02 | Spheroidal graphite cast iron with high strength and ductility and transmission case produced therefrom |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20040219052A1 (en) |
| EP (1) | EP1415009B1 (en) |
| JP (1) | JP2004537652A (en) |
| KR (1) | KR20040017853A (en) |
| AT (2) | AT5381U1 (en) |
| CA (1) | CA2456432A1 (en) |
| WO (1) | WO2003014407A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006038670B4 (en) * | 2006-08-17 | 2010-12-09 | Federal-Mogul Burscheid Gmbh | High silicon steel material for the production of piston rings and cylinder liners |
| RU2546938C1 (en) * | 2014-02-25 | 2015-04-10 | Юлия Алексеевна Щепочкина | Cast iron |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3749463A (en) * | 1970-10-13 | 1973-07-31 | J Krapf | Bearing mounting method and apparatus |
| DE2456700C3 (en) * | 1974-11-30 | 1980-07-31 | Goetze Ag, 5093 Burscheid | Sealing strip for rotary piston engines |
| DE3147461C2 (en) * | 1981-12-01 | 1983-10-13 | Goetze Ag, 5093 Burscheid | Wear-resistant cast iron alloy of high strength with spherulitic graphite precipitation, its manufacturing process and its use |
| JPS6017819B2 (en) * | 1982-04-01 | 1985-05-07 | マツダ株式会社 | Spheroidal graphite cast iron with excellent high-temperature oxidation resistance and thermal fatigue resistance |
| US4484953A (en) * | 1983-01-24 | 1984-11-27 | Ford Motor Company | Method of making ductile cast iron with improved strength |
| US4475956A (en) * | 1983-01-24 | 1984-10-09 | Ford Motor Company | Method of making high strength ferritic ductile iron parts |
| DE19636808C1 (en) * | 1996-09-11 | 1997-09-25 | Harzer Grauguswerke Gmbh | Spheroidal graphite alloy cast@ iron |
-
2001
- 2001-08-07 AT AT0062301U patent/AT5381U1/en not_active IP Right Cessation
-
2002
- 2002-08-02 JP JP2003519535A patent/JP2004537652A/en active Pending
- 2002-08-02 WO PCT/AT2002/000234 patent/WO2003014407A1/en active IP Right Grant
- 2002-08-02 KR KR10-2004-7001871A patent/KR20040017853A/en active Search and Examination
- 2002-08-02 EP EP02766913A patent/EP1415009B1/en not_active Expired - Lifetime
- 2002-08-02 CA CA002456432A patent/CA2456432A1/en not_active Abandoned
- 2002-08-02 AT AT02766913T patent/ATE316586T1/en not_active IP Right Cessation
- 2002-08-02 US US10/486,154 patent/US20040219052A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| WO2003014407A1 (en) | 2003-02-20 |
| CA2456432A1 (en) | 2003-02-20 |
| EP1415009B1 (en) | 2006-01-25 |
| US20040219052A1 (en) | 2004-11-04 |
| ATE316586T1 (en) | 2006-02-15 |
| EP1415009A1 (en) | 2004-05-06 |
| KR20040017853A (en) | 2004-02-27 |
| AT5381U1 (en) | 2002-06-25 |
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