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

Definitions

• the invention relates to a nodular cast iron with siliconized silicon, as it is commonly used for heavily used castings, for example the materials according to DIN or SAE [in square brackets]:
• the first one (a) is still ferritic and therefore tenacious, but its strength is only mediocre. If the strength is to be higher, one resorts to the materials b), c) and d), which in turn are ferritic-perlitic to 0 perlitiscli, with strong declinative toughness and weldability. These materials have from a) to d) increasingly a multiphase (ferritic-pearlitic) Grundfuge locally different composition, which is reinforced by the unavoidable during casting locally different cooling conditions and to 5 problems in the subsequent, in particular machining , Editing leads. Their use is therefore limited to special applications. In vehicle construction, the reduction of weight is a particular concern, which in castings low wall thickness - ie high strength - but also requires toughness and good workability. It is then necessary to use steel, but it is about 10 percent heavier.
• a nodular cast iron according to the invention contains: 4 to 6 percent silicon and a proportion of carbon corresponding to the carbon equivalent, a maximum of 0.03 percent phosphorus and 0.2 to 0.5 percent nickel.
• the high content of silicon has a ferrite-stabilizing effect and also increases the strength.
• the carbon equivalent requires a corresponding reduction of the carbon content. Since phosphorus acts as embrittlement due to the strong solid solution hardening of the compounds it has received, the phosphorus content must be kept as small as possible. Nickel also reduces the brittleness and increases the strength, the required proportions are so small that the resulting additional costs are negligible.
• the invention also relates to housings, in particular gear housing, which consist of a ductile iron according to one of the preceding claims.
• gear housing which consist of a ductile iron according to one of the preceding claims.
• Such a gear housing can be thinner walled and lighter because of the high strength of the fiction, according to improved ductile iron.
• the machining necessary for the formation of connection flanges and bearing seats is possible without restriction.
• a gear housing made of the material according to the invention can be welded to a toothed part made of alloyed and / or case-hardened steel.
• Fig. 1 A comparison of nodular iron according to the prior
• FIG. 2 shows a section through a transmission housing according to the invention.
• the housing for example, the housing of a transmission, with 1 and a connected thereto to a component gear designated by 2.
• the housing 1 here consists of an inventively improved ductile iron.
• the gear 2 is made of steel and case hardened.
• the housing 1 has a first axis normal to be welded surface 3, To which a cylindrical collar 4 connects, which forms an outer cylindrical mating surface 5.
• the housing 1 may be provided at a location greater wall thickness with a parallel to the first surface to be welded to circumferential groove 6, which is rounded in cross-section.
• the cylindrical mating surface 8 can be withdrawn at the transition to the second surface 7 to be welded, so that an extension 9 forms. This facilitates the production and the sliding of the gear on the collar 4 and, if necessary, improves the penetration of the root.
• the axis of rotation of the component and 20 of the welding head is designated.

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)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=3495482

Family Applications (1)

Country Status (7)

Cited By (1)

Families Citing this family (1)

Citations (6)

Family Cites Families (1)

• 2001
  • 2001-08-07 AT AT0062301U patent/AT5381U1/de not_active IP Right Cessation
• 2002
  • 2002-08-02 EP EP02766913A patent/EP1415009B1/de not_active Expired - Lifetime
  • 2002-08-02 CA CA002456432A patent/CA2456432A1/en not_active Abandoned
  • 2002-08-02 JP JP2003519535A patent/JP2004537652A/ja active Pending
  • 2002-08-02 US US10/486,154 patent/US20040219052A1/en not_active Abandoned
  • 2002-08-02 AT AT02766913T patent/ATE316586T1/de not_active IP Right Cessation
  • 2002-08-02 WO PCT/AT2002/000234 patent/WO2003014407A1/de not_active Ceased
  • 2002-08-02 KR KR10-2004-7001871A patent/KR20040017853A/ko not_active Ceased

Patent Citations (6)

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