Cold rolled steel sheet for gasket material, method for production thereof and gasket material produced by the method

Abstract

A cold rolled steel sheet for a gasket material, characterized in that it has a chemical composition, in wt %: C: 0.08 to 0.60%, Si: 1.0 to 3.0%, Mn: 0.5 to 3.0%, P≦0.06%, S;≦0.06%, Al: ≦0.1%, N: 0.0010 to 0.0150%, and the balance: Fe and inevitable impurities: and a method for producing the steel sheet. The cold collect steel sheet for a gasket material can provide a good balance between bead formability and spring characteristics, together with excellent gas sealing property, and can be produced at a low cost, and thus can be used for producing a gasket being suitably used at openings such as those for cooling water and a lubricating oil and a bolt hole.

1 . A cold rolled steel sheet for a gasket material characterized by comprising, on the weight % base, from 0.08 to 0.60% of C, from 1.0 to 3.0% of Si, from 0.5 to 3.0% of Mn, 0.06% or more of P, 0.06% or less of S, 0.1% or less of Al, from 0.0010 to 0.0150% of N and the balance of Fe and inevitable impurities.  
   
   
       2 . A method of producing a cold rolled steel plate for a gasket material, characterized by hot rolling a continuously cast piece comprising, on the weight % base, from 0.08 to 0.60% of C, from 1.0 to 3.0% of Si, from 0.5 to 3.0% of Mn, 0.06% or more of P, 0.06% or less of S, 0.1% or less of Al, from 0.0010 to 0.0150% of N and the balance of Fe and inevitable impurities, conducting pickling, applying cold rolling at a draft of from 50 to 90%.  
   
   
       3 . A method of producing a cold rolled steel plate for a gasket material, characterized by hot rolling a continuously cast piece comprising, on the weight % base, from 0.08 to 0.60% of C, from 1.0 to of 3.0% Si, from 0.5 to 3.0% of Mn, 0.06% or more of P, 0.06% or less of S, 0.1% or less of Al, from 0.0010 to 0.0150% of N and the balance of Fe and inevitable impurities, conducting pickling, applying cold rolling at a draft of from 50 to 90%, and further applying Zn or Ni plating on the surface.  
   
   
       4 . A method of producing a cold rolled steel plate for a gasket material, characterized by hot rolling a continuously cast piece comprising, on the weight % base, from 0.08 to 0.60% of C, from 1.0 to 3.0% of Si, from 0.5 to 3.0% of Mn, 0.06% or more of P, 0.06% or less of S, 0.1% or less of Al, from 0.0010 to 0.0150% of N and the balance of Fe and inevitable impurities, conducting pickling, applying cold rolling at a draft of from 50 to 90%, applying annealing at 630 to 870° C. or higher by continuous annealing or at 500 to 750° C. or higher by batchwise annealing and, subsequently, applying secondary rolling at a draft of 30% or more.  
   
   
       5 . A method of producing a cold rolled steel plate for a gasket material, characterized by hot rolling a continuously cast piece comprising, on the weight % base, from 0.08 to 0.60% of C, from 1.0 to 3.0% of Si, from 0.5 to 3.0% of Mn, 0.06% or more of P, 0.06% or less of S, 0.1% or less of Al, from 0.0010 to 0.0150% of N and the balance of Fe and inevitable impurities, conducting pickling, applying cold rolling at a draft of from 50 to 90%, applying annealing at 630 to 870° C. or higher by continuous annealing or at 500 to 750° C. or higher by batchwise annealing and, subsequently, applying secondary rolling at a draft of 7% or less.  
   
   
       6 . A method of producing a cold rolled steel plate for a gasket material, characterized by hot rolling a continuously cast piece comprising, on the weight % base, from 0.08 to 0.60% of C, from 1.0 to 3.0% of Si, from 0.5 to 3.0% of Mn, 0.06% or more of P, 0.06% or less of S, 0.1% or less of Al, from 0.0010 to 0.0150% of N and the balance of Fe and inevitable impurities, conducting pickling, applying a cold rolling at a draft of from 50 to 90%, applying annealing at 630 to 870° C. or higher by continuous annealing or at 500 to 750° C. or higher by batchwise annealing, subsequently, applying secondary rolling at a draft of 30% or more and, further, applying Zn or Ni plating on the surface.  
   
   
       7 . A method of producing a cold rolled steel plate for a gasket material, characterized by hot rolling a continuously cast piece comprising, on the weight % base, from 0.08 to 0.60% of C, from 1.0 to 3.0% of Si, from 0.5 to 3.0% of Mn, 0.06% or more of P, 0.06% or less of S, 0.1% or less of Al, from 0.0010 to 0.0150% of N and the balance of Fe and inevitable impurities, conducting pickling, applying cold rolling at a draft of from 50 to 90%, applying annealing at 630 to 870° C. or higher by continuous annealing or at 500 to 750° C. or higher by batch annealing, subsequently, applying secondary rolling at a draft of 7% or less and, further, applying Zn or Ni plating on the surface.  
   
   
       8 . A gasket material produced by using the cold rolled steel sheet for a gasket material according to  claim 1 .  
   
   
       9 . A gasket material produced by using the cold rolled steel sheet for a gasket material according to  claim 2 .  
   
   
       10 . A gasket material produced by using the cold rolled steel sheet for a gasket material according to  claim 3 .  
   
   
       11 . A gasket material produced by using the cold rolled steel sheet for a gasket material according to  claim 4 .  
   
   
       12 . A gasket material produced by using the cold rolled steel sheet for a gasket material according to  claim 5 .  
   
   
       13 . A gasket material produced by using the cold rolled steel sheet for a gasket material according to  claim 6 .  
   
   
       14 . A gasket material produced by using the cold rolled steel sheet for a gasket material according to  claim 7.