Chill Mould for the Casting of Light Metal Casting Materials, and the Use of Such a Mould, as Well as of a Cast Iron Material

Abstract

A chill mould for the casting of light metal casting materials is provided. The chill mould is manufactured from an Ni-alloyed and/or Mn-alloyed cast iron material, of which the Ni and/or Mn content is dimensioned in such a way that the thermal coefficient of expansion of the chill mould is adjusted to the thermal coefficient of expansion of the light metal casting material, which is to be cast in each case. A chill mould is provided which can be manufactured in an economical manner which possesses optimized properties of use and at the same time allows for optimized casting results. Such a chill mould can be a constituent part of a sand casting mould for the casting of a cylinder block from a light metal casting material.

1 . A chill mould for a casting light metal casting material, comprising at least of one of a Ni and Mn alloyed cast iron material of which the Ni and Mn content, respectively, is manufactured so that the thermal coefficient of expansion of the chill mould is adjusted to the thermal coefficient of expansion of the light metal casting material being cast. 
   
   
       2 . The hill mould according to  claim 1 , characterized in that wherein the alloyed cast iron material has a Ni content from 0.1% by weight to 13.0% by weight. 
   
   
       3 . The hill mould according to  claim 1 , wherein the alloyed cast iron material has a Mn content from 0.1 to 19.0% by weight. 
   
   
       4 . The hill mould according to  claim 1  wherein the alloyed cast iron material includes, in addition to Ni and/or Mn, as well as Fe and unavoidable impurities, the following alloy constituents (in % by weight):
 C: 1.5-4.0%,   Si: 0.5-4.0%,   Cu: 0.3-7.0%,   Cr: <2.0%,   Al: 0.3-8.0%,   Ti: 0.01-0.5%   
   
   
       5 . Use of a chill mould, including a cast iron material and at least one of a Ni and Mn content in an amount sufficient so that the thermal coefficient of expansion of the chill mould is adjusted to the thermal coefficient of expansion of a light metal casting material, the chill mould a constituent part of a sand casting mould for the casting of a cylinder block from the light metal casting material. 
   
   
       6 . Use of a cast iron material, which contains (in % by weight)
 C: 1.5-4.0%,   Si: 0.5-4.0%,   Cu: 0.3-7.0%,   Cr: <2.0%,   Al: 0.3-8.0%,   Ti: 0.01-0.5%   as well as at least one element from the group Ni, Mn, with the proviso that the content amounts to:   Ni: 0.1-13.0%   and   Mn: 0.1-19.0%,   and as the remainder iron and unavoidable impurities,   for the manufacture of a chill mould for the casting of light metal casting materials.   
   
   
       7 . Use according to  claim 5  wherein the light metal casting material is an alloyed material based on aluminum. 
   
   
       8 . The chill mould according to  claim 1  wherein the alloyed cast iron material has a Ni content of about 6% by weight to about 8% by weight. 
   
   
       9 . The chill mould according to  claim 2  wherein the alloyed cast iron material has a Mn content from 0.1 to 19.0% by weight. 
   
   
       10 . A method of forming a chill mould for casting a light metal casting material, comprising:
 providing a cast iron material;   adding at least one of Ni and Mn to the cast iron material;   adjusting the thermal coefficient of expansion of the cast iron material to the thermal coefficient of expansion of the light metal casting material using the content of the at least one of Ni and Mn; and   solidifying the cast iron material and the content of the at least one of Ni and Mn to form the chill mould.   
   
   
       11 . The method according to  claim 10  further comprising adjusting the deviation between the thermal coefficient of expansion of the iron cast material used for the chill mould and the thermal coefficient of expansion of the light metal casting material to a range of ±10.4×10 −6 /K. 
   
   
       12 . The method according to  claim 10  further comprising adding a Mn content of 0.1 to 19.0% by weight. 
   
   
       13 . The method according to  claim 10  further comprising adding a Ni content of 0.1% by weight to 13.0% by weight.