Steel alloy, holders and holder details for plastic moulding tools, and tough hardened blanks for holders and holder details

Abstract

A steel alloy suitable for holders and holder details for plastic moulding tools contains in weight-%: 0.06-0.15 C, 0.07-0.22 N, wherein the total amount of C+N shall satisfy the condition, 0.16≦C+N≦0.26, 0.1-1.0 Si, 0.1-2.0 Mn, 12.5-14.5 Cr, 0.8-2.5 Ni, 0.1 1.5 Mo, optionally vanadium up to max. 0.7 V, optionally, in order to improve the machinability of the steel, one or more of the elements S, Ca and O in amounts up to max. 0.25 S, max. 0.01 (100 ppm) Ca, max. 0.01 (100 ppm) O, balance iron and unavoidable impurities.

1 . A steel alloy, characterized in that it has a chemical composition which contains in weight-%: 
 0.06-0.15 C    0.16≦C+N≦0.26    0.1-1.0 Si    0.1-2.0 Mn    12.5-14.5 Cr    0.8-2.5 Ni    0.1-1.5 Mo    optionally vanadium up to max. 0.7 V    optionally one or more of the elements S, C and 0 in order to improve the machinability of the steel, in amounts up to    max. 0.25 S,    max. 0.01 (100 ppm) Ca,    max. 0.01 (100 ppm) O,    balance iron and unavoidable impurities.    
     
     
         2 . A steel alloy according to  claim 1 , characterized in that it contains 0.07-0.13 C.  
     
     
         3 . A steel alloy according to  claim 1 , characterized in that ft contains 0.08-0.15 N.  
     
     
         4 . A steel alloy according to any of claims  1 - 3 , characterized in that the total amount of C+N shall satisfy the condition 0.17<C+N<0.23.  
     
     
         5 . A steel alloy according to  claim 1 , characterized in that it contains 0.1-0.7 Si preferably max. 0.5 Si.  
     
     
         6 . A steel alloy according to  claim 5 , characterized in that it contains 0.1-0.4 Si.  
     
     
         7 . A steel alloy according to  claim 1 , characterized in that it contains max. 1.5 Mn, preferably max. 1.3 Mn.  
     
     
         8 . A steel alloy according to  claim 1 , characterized in that it contains 13.0-14.0 Cr.  
     
     
         9 . A steel alloy according to  claim 8 , characterized in that it contains 13.1-13.7 Cr.  
     
     
         10 . A steel alloy according to  claim 1 , characterized in that it contains 1.0-2.0 Ni.  
     
     
         11 . A steel alloy according to  claim 10 , characterized in that it contains 1.4-1.8 Ni.  
     
     
         12 . A steel alloy according to  claim 1 , characterized in that it contains 0.1-0.9 Mo.  
     
     
         13 . A steel alloy according to  claim 12 , characterized in that it contains 0.4-0.6 Mo.  
     
     
         14 . A steel alloy according to  claim 1 , characterized in that it contains at least 0.07 V.  
     
     
         15 . A steel alloy according to  claim 14 , characterized in that it contains at least 0.10 V.  
     
     
         16 . A steel alloy according to  claim 15 , characterized in that it contains 0.10-0.30 V.  
     
     
         17 . A steel alloy according to  claim 1 , characterized in that it contains max. 0. 15 S.  
     
     
         18 . A steel alloy according to  claim 17 , characterized in that it contains 0.08-0.12 S.  
     
     
         19 . A steel alloy according to  claim 1 , characterized in that it does not contain S, Ca or O above impurity level.  
     
     
         20 . A steel alloy according to any of the preceding claims, characterized in that it contains 
 0.06-0.13 C    0.08-0.15N    0.1-0.4, preferably 0.2-0.3 Si    0.2-1.3 Mn    12.5-13.6 Cr    0.1-0.3 V    0.2-0.8 Mo    1.4-1.8 Ni    
     
     
         21 . Holders and holder details for plastic moulding tools, characterized in that they consist of a steel alloy according to any of claims  1 - 20  .