WO2003045624A2 - Vermicular cast iron of high machinability and free from microporosities - Google Patents
Vermicular cast iron of high machinability and free from microporosities Download PDFInfo
- Publication number
- WO2003045624A2 WO2003045624A2 PCT/BR2002/000163 BR0200163W WO03045624A2 WO 2003045624 A2 WO2003045624 A2 WO 2003045624A2 BR 0200163 W BR0200163 W BR 0200163W WO 03045624 A2 WO03045624 A2 WO 03045624A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cast iron
- vermicular cast
- free
- microporosities
- presenting
- Prior art date
Links
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
- C22C37/04—Cast-iron alloys containing spheroidal graphite
-
- 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
Definitions
- the present report is about a vermicular cast iron, of high machinability and free from microporosity. More specifically, a vermicular cast iron of high machinability and free from microporosities that comprises classes between 350 and 500 MEGA PASCAL of ultimate tensile strength.
- the vermicular cast iron represents a group of Fe-C-Si alloys, with Mn, P, S, and controlled additions of Mg, presenting graphite predominately in vermicular form (form IV according to Standard ASTM A247), with up to 20% of nodules (forms I and II as per Standard ASTM A247) in its microstructure.
- the addition of complementary pearlitic elements, such as Mn, Cr, Cu and Sn allow one to obtain the desired class, which can vary between 350 and 500 Mega Pascal of ultimate tensile strength.
- additions of Ti are also carried out to increase the resistance to wear out and to improve the lubrication of the cylinder in engine blocks.
- Vermicular cast iron has been increasingly applied in automotive components such as internal combustion engine blocks, internal combustion engine heads, disks and brake drums. In general, its application involves the substitution of gray cast iron to increase tensile strength.
- One of the goals of the present invention is to provide vermicular cast iron of high machinability, free from microporosities that allows the increase in the life of tools to be used with the cast part together with the innovated characteristics.
- vermicular cast iron of high machinability, free form microporosities that presents a bigger amount of graphite per volume of vermicular cast iron; this increase being the amount of graphite obtained by the addition of nodules in the microstructure so that the percentage of those nodules be also increased in relation to the volume in the conventional vermicular cast iron.
- the present invention proposes a vermicular cast iron of high machinability and free from microporosities that presents an amount of graphite between 12-15% in volume of vermicular cast iron; the increase in the amount of graphite is obtained with the addition of nodules to the microstructure, resulting in an amount between 20-40% in the volume of vermicular cast iron.
- the machinability is improved, if compared to the conventional vermicular iron, with the limitation of elements that form carbide or carbonitrides
- vermicular cast iron of high machinability and free from microporosities has a content of carbon between 3,6 and 3,9%, a content of Si between 2,0 and
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02782548A EP1448339A4 (en) | 2001-11-27 | 2002-11-26 | Vermicular cast iron of high machinability and free from microporosities |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR0105988A BR0105988B1 (en) | 2001-11-27 | 2001-11-27 | High machinability and microporosity-free vermicular cast iron. |
BRPI0105988-2 | 2001-11-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003045624A2 true WO2003045624A2 (en) | 2003-06-05 |
WO2003045624A3 WO2003045624A3 (en) | 2004-03-18 |
Family
ID=3948159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/BR2002/000163 WO2003045624A2 (en) | 2001-11-27 | 2002-11-26 | Vermicular cast iron of high machinability and free from microporosities |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1448339A4 (en) |
BR (1) | BR0105988B1 (en) |
WO (1) | WO2003045624A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104480377A (en) * | 2014-12-15 | 2015-04-01 | 山东省源通机械股份有限公司 | Vermicular graphite cast iron single cylinder diesel engine body with high vermicular graphite rate and preparation method thereof |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5858127A (en) * | 1996-08-02 | 1999-01-12 | Gunite Corporation | Metal alloys and brake drums made from such alloys |
WO2001038593A1 (en) * | 1999-11-23 | 2001-05-31 | Sintercast Ab | New cast iron alloy and method for making the same |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1069058A (en) * | 1965-05-04 | 1967-05-17 | Int Nickel Ltd | Cast iron |
US4409028A (en) * | 1979-10-24 | 1983-10-11 | Moore William H | Process for producing cast iron |
CN85107725B (en) * | 1985-10-17 | 1987-12-23 | 陕西机械学院 | Creeping graphite cast iron for manufacturing mould for glass bottle |
JP2624886B2 (en) * | 1990-09-19 | 1997-06-25 | 株式会社日立製作所 | Elevator equipment |
EP0769615A1 (en) * | 1995-10-17 | 1997-04-23 | Ford Motor Company Limited | Engine cylinder block |
JP2894300B2 (en) * | 1996-11-15 | 1999-05-24 | 株式会社日立製作所 | Compact vermicular graphite cast iron |
-
2001
- 2001-11-27 BR BR0105988A patent/BR0105988B1/en not_active IP Right Cessation
-
2002
- 2002-11-26 WO PCT/BR2002/000163 patent/WO2003045624A2/en not_active Application Discontinuation
- 2002-11-26 EP EP02782548A patent/EP1448339A4/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5858127A (en) * | 1996-08-02 | 1999-01-12 | Gunite Corporation | Metal alloys and brake drums made from such alloys |
WO2001038593A1 (en) * | 1999-11-23 | 2001-05-31 | Sintercast Ab | New cast iron alloy and method for making the same |
Non-Patent Citations (3)
Title |
---|
DATABASE HCAPLUS [Online] XP002964977 Database accession no. 1987:559208 & CN 85 107 725 A * |
FULLER A.G. ET AL: 'A report on the effect upon mechanical properties of variation in graphite from in irons having varying amounts of ferrite and pearlite in the matrix structure and the use of nondestructive tests in the assessments of mechanical properties of such irons' TRANSACTIONS OF THE AMERICAN FOUNDRYMEN'S SOCIETY vol. 88, 1980, pages 21 - 50, XP002981621 * |
See also references of EP1448339A2 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104480377A (en) * | 2014-12-15 | 2015-04-01 | 山东省源通机械股份有限公司 | Vermicular graphite cast iron single cylinder diesel engine body with high vermicular graphite rate and preparation method thereof |
Also Published As
Publication number | Publication date |
---|---|
WO2003045624A3 (en) | 2004-03-18 |
BR0105988A (en) | 2002-11-12 |
EP1448339A4 (en) | 2005-02-23 |
EP1448339A2 (en) | 2004-08-25 |
BR0105988B1 (en) | 2009-08-11 |
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