WO1998047648A3 - Low-alloy cast iron tappet, apparatus, and process for its manufacturing - Google Patents

Low-alloy cast iron tappet, apparatus, and process for its manufacturing Download PDF

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Publication number
WO1998047648A3
WO1998047648A3 PCT/SI1998/000010 SI9800010W WO9847648A3 WO 1998047648 A3 WO1998047648 A3 WO 1998047648A3 SI 9800010 W SI9800010 W SI 9800010W WO 9847648 A3 WO9847648 A3 WO 9847648A3
Authority
WO
WIPO (PCT)
Prior art keywords
cooling
castings
tappet
cast iron
hardened
Prior art date
Application number
PCT/SI1998/000010
Other languages
French (fr)
Other versions
WO1998047648A2 (en
Inventor
Mile Jakir
Original Assignee
Mile Jakir
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mile Jakir filed Critical Mile Jakir
Priority to AU79524/98A priority Critical patent/AU7952498A/en
Publication of WO1998047648A2 publication Critical patent/WO1998047648A2/en
Publication of WO1998047648A3 publication Critical patent/WO1998047648A3/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D5/00—Heat treatments of cast-iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/84—Controlled slow cooling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

Low-alloy cast iron tappet, apparatus, and process for it solve the problem of obtaining tappet face surface microstructure. The microstructure consists of fine complex carbide in the martensite form, which is highly resistant to wear, features high fatigue (rolling) resistance, and is at the same time tough enough not to allow pitting during the engine operation. When pouring the molten mass into moulds (Fig. 3), the mass cooling is done under equal conditions, as each casting is provided with the same type of the cooling element. Application of cooling metal insert elements allows uniform cooling of castings, and consequently more uniform formation of the malleable white iron layer on the tappet face surface. Prior to the mechanical processing (turning and drilling), the castings are softened and annealed just lower critical point by a combined process of thermal treatment. After the machining process is completed, the castings are hardened to the prescribed hardness. They can be hardened in salt baths either by induction hardening or by flame hardening, depending on the equipment of the production plant where the procedure is to be performed.
PCT/SI1998/000010 1997-04-21 1998-04-20 Low-alloy cast iron tappet, apparatus, and process for its manufacturing WO1998047648A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU79524/98A AU7952498A (en) 1997-04-21 1998-04-20 Low-alloy cast iron tappet, apparatus, and process for its manufacturing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SIP-9700101 1997-04-21
SI9700101A SI9700101A (en) 1997-04-21 1997-04-21 Technological process of manufacture of valve raisers from low-alloy hard casting

Publications (2)

Publication Number Publication Date
WO1998047648A2 WO1998047648A2 (en) 1998-10-29
WO1998047648A3 true WO1998047648A3 (en) 1999-01-21

Family

ID=20432030

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SI1998/000010 WO1998047648A2 (en) 1997-04-21 1998-04-20 Low-alloy cast iron tappet, apparatus, and process for its manufacturing

Country Status (4)

Country Link
AU (1) AU7952498A (en)
SI (1) SI9700101A (en)
WO (1) WO1998047648A2 (en)
YU (1) YU16398A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2793174B1 (en) * 1999-05-07 2001-06-29 Renault METHOD AND DEVICE FOR MOLDING A CYLINDER HEAD OF AN INTERNAL COMBUSTION ENGINE
CN112743059A (en) * 2019-10-29 2021-05-04 中船海洋动力部件有限公司 Novel chill is used in casting

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE416783C (en) * 1923-12-18 1925-07-25 Willibald Raym Dipl Ing Casting mold, especially for head and foot straightening rolls
US1560832A (en) * 1922-11-27 1925-11-10 Merrill M Wilcox Apparatus for forming valve tappets and the like
US1727565A (en) * 1928-03-09 1929-09-10 Wilcox Rich Corp Chill plate for use in molding tappet heads
GB356795A (en) * 1929-06-21 1931-09-07 Ford Motor Co Improvements in a cast iron article and method of manufacturing same
US1999790A (en) * 1930-08-18 1935-04-30 Howard I Shaw Process for hardening gray and mottled cast iron
US3122822A (en) * 1960-03-31 1964-03-03 Johnson Products Inc Method of making a casting
JPH0230360A (en) * 1988-07-16 1990-01-31 Nippon Piston Ring Co Ltd Production of cast iron product

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1560832A (en) * 1922-11-27 1925-11-10 Merrill M Wilcox Apparatus for forming valve tappets and the like
DE416783C (en) * 1923-12-18 1925-07-25 Willibald Raym Dipl Ing Casting mold, especially for head and foot straightening rolls
US1727565A (en) * 1928-03-09 1929-09-10 Wilcox Rich Corp Chill plate for use in molding tappet heads
GB356795A (en) * 1929-06-21 1931-09-07 Ford Motor Co Improvements in a cast iron article and method of manufacturing same
US1999790A (en) * 1930-08-18 1935-04-30 Howard I Shaw Process for hardening gray and mottled cast iron
US3122822A (en) * 1960-03-31 1964-03-03 Johnson Products Inc Method of making a casting
JPH0230360A (en) * 1988-07-16 1990-01-31 Nippon Piston Ring Co Ltd Production of cast iron product

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
KLAUS RÖHRIG: "Jahresübersicht Legiertes Gusseisen", GIESSEREI, vol. 71, no. 16/17, 6 August 1984 (1984-08-06), Düsseldorf, DE, pages 654 - 655, XP002080214 *
P. PEPPLER: "Schalenhartguss .....", KONSTRUIEREN + GIESSEN, 1979, Düsseldorf, DE, pages 12 - 18, XP002080213 *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 177 (M - 0960) 9 April 1990 (1990-04-09) *
RICHARD MEYER: "DER HARTGUSS", 1954, VEB WILHELM KNAPP VERLAG, HALLE (SAALE), DE, XP002080283 *

Also Published As

Publication number Publication date
YU16398A (en) 1999-11-22
WO1998047648A2 (en) 1998-10-29
SI9700101A (en) 1997-10-31
AU7952498A (en) 1998-11-13

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