Cast iron material

Abstract

The invention relates to a iron material with graphite flakes, which in a simple manner allows the respective optimal properties to be adjusted for a wide product range by varying the contents of the respective alloy components. For this purpose, cast iron material according to the invention comprises (in % by weight) 3.4 to 4.1% C, 0.9 to 1.4% Si, 0.4 to 0.7% Mn, 0.4 to 0.6% Cu, 0.01 to 0.04% S, 0.003 to 0.007% O 2 , ≦0.04% P and iron and unavoidable impurities as the remainder. In addition, the following may optionally be included singly or in combination 0.15 to 0.45% Mo, 0.005 to 0.02% La, 0.0005 to 0.01% Sr, 0.05 to 0.8% Ni, 0.005 to 0.1% V, 0.05 to 0.15% Sn, 0.05 to 0.08% N and 0.01 to 0.02% Ce. In this case 0.85%≦S c ≦1.05% applies to the degree of saturation Sc=C %/4.26−0.3*(Si %+P %), and 1.97%≦MEG≦2.07% applies to the respective quantity % MEG=2.25%−0.2 Si %.

1 . Cast iron material with graphite flakes, with the following composition (in % by weight): 
 C: 3.4 to 4.1%,    Si: 0.9 to 1.4%,    Mn: 0.4 to 0.7%,    Cu: 0.4 to 0.6%,    S: 0.01 to 0.04%,    O 2 : 0.003 to 0.007%,    P: <0.04%,    the remainder comprising Fe and unavoidable impurities, wherein the composition may also optionally contain one or more of the following elements:    Mo: 0.15 to 0.45%,    La: 0.005 to 0.02%,    Sr: 0.0005 to 0.01%,    Ni: 0.05 to 0.8%,    V: 0.005 to 0.1%,    Sn: 0.05 to 0.15%,    N: 0.05 to 0.08%    Ce: 0.01 to 0.02%    and 0.85%≦S c ≦1.05% applies to the degree of saturation Sc=C %/4.26−0.3*(Si %+P %) (C %: respective C content, Si %:    respective Si content, P %: respective P content), and 1.97%≦MEG≦2.07% applies to the respective quantity % MEG=2.25%−0.2 Si % (Si %: respective Si content).    
   
   
       2 . Cast iron material according to  claim 1 , characterised in that the C content is 3.8 to 4.1% by weight.  
   
   
       3 . Cast iron material according to  claim 2 , characterised in that the Si content is 0.9 to 1.2% by weight.  
   
   
       4 . Cast iron material according to either  claim 2  or  claim 3 , characterised in that the O 2  content is 0.003 to 0.004% by weight.  
   
   
       5 . Cast iron material according to  claim 1 , characterised in that the C content is 3.4 to 3.6% by weight.  
   
   
       6 . Cast iron material according to  claim 5 , characterised in that the Si content is 1.15 to 1.4% by weight.  
   
   
       7 . Cast iron material according to either  claim 5  or  claim 6 , characterised in that the Sr content is 0.005 to 0.002% by weight.  
   
   
       8 . Cast iron material according to any one of  claims 5  to  7 , characterised in that the V content is 0.025 to 0.045% by weight.  
   
   
       9 . Cast iron material according to any one of  claims 5  to  8 , characterised in that the Sn content is 0.05 to 0.15% by weight.  
   
   
       10 . Cast iron material according to any one of  claims 5  to  9 , characterised in that the Si content is 1.15 to 1.25% by weight.  
   
   
       11 . Cast iron material according to any one of  claims 5  to  10 , characterised in that the O 2  content is 0.003 to 0.005% by weight.  
   
   
       12 . Cast iron material according to any one of  claims 5  to  10 , characterised in that the O 2  content is 0.004 to 0.006% by weight.  
   
   
       13 . Cast iron material according to any one of  claims 5  to  10 , characterised in that the O 2  content is 0.005 to 0.007% by weight.  
   
   
       14 . Cast iron material according to any one of the preceding claims, characterised in that the S content is at least 0.02% by weight.  
   
   
       15 . Cast iron material according to any one of the preceding claims, characterised in that the Mo content is 0.2 to 0.4% by weight.  
   
   
       16 . Cast iron material according to any one of the preceding claims, characterised in that the Mn content is 0.45 to 0.65% by weight.  
   
   
       17 . Cast iron material according to any one of the preceding claims, characterised in that the Cu content is 0.45 to 0.55% by weight.  
   
   
       18 . Cast iron material according to any one of the preceding claims, characterised in that its Sr content is at least 0.05% by weight.  
   
   
       19 . Cast iron material according to any one of the preceding claims, characterised in that in the cast state more than 50% of the oxygen contained therein is in the form of a type of oxide of which the starting temperature of the reduction with oxygen is above 1,700 K.