Martensitic stainless steel member and method for manufacturing same, and martensitic stainless steel component and method for manufacturing same

Abstract

Provided are a stainless steel component having excellent corrosion resistance and abrasion resistance and a method for manufacturing the same, a stainless steel member suitable for fabricating the component, and a method for manufacturing the stainless steel member. The present invention is a stainless steel member having a thickness of 0.3 mm or less and having a component composition comprising, in terms of mass %, 0.10-0.40% C, 1.00% or less of Si, 0.10-1.50% Mn, 10.0-18.0% Cr, and 2.00% or less of N, the remainder being Fe and impurities, wherein the amount of N in a depth range of at least 0.05 mm from the surface of the stainless steel member is 0.80-2.00 mass %. The present invention is also a method for manufacturing the stainless steel member, a stainless steel component which uses the stainless steel member, and a method for manufacturing the stainless steel component.

1 . A martensitic stainless steel member having a thickness of 0.3 mm or less and having a component composition comprising, in terms of mass %, 0.10 to 0.40% of C, 1.00% or less of Si, 0.10 to 1.50% of Mn, 10.0 to 18.0% of Cr, 2.00% or less of N, and the remainder being Fe and impurities, wherein the amount of N in a depth range of at least 0.05 mm from the surface of the martensitic stainless steel member is in a range of 0.80 to 2.00 mass %. 
     
     
         2 . The martensitic stainless steel member according to  claim 1 , wherein the component composition of the martensitic stainless steel member further comprises, in terms of mass %, 4.00% or less of Mo. 
     
     
         3 . The martensitic stainless steel member according to  claim 1 , wherein the component composition of the martensitic stainless steel member further comprises, in terms of mass %, 8.00% or less of W. 
     
     
         4 . The martensitic stainless steel member according to  claim 1 , wherein the component composition of the martensitic stainless steel member further comprises, in terms of mass %, 1.00% or less of Ni. 
     
     
         5 . The martensitic stainless steel member according to  claim 1 , wherein the component composition of the martensitic stainless steel member further comprises, in terms of mass %, 0.10% or less of Nb. 
     
     
         6 . A martensitic stainless steel component, comprising a martensitic structure having an average crystal grain diameter of 20 μm or less, having a thickness of 0.3 mm or less and having a component composition comprising, in terms of mass %, 0.10 to 0.40% of C, 1.00% or less of Si, 0.10 to 1.50% of Mn, 10.0 to 18.0% of Cr, 2.00% or less of N, and the remainder being Fe and impurities, wherein the amount of N in a depth range of at least 0.05 mm from the surface of the martensitic stainless steel component is in a range of 0.80 to 2.00 mass %, and hardness in the depth range is 650 HV or more. 
     
     
         7 . The martensitic stainless steel component according to  claim 6 , wherein the component composition of the martensitic stainless steel component further comprises, in terms of mass %, 4.00% or less of Mo. 
     
     
         8 . The martensitic stainless steel component according to  claim 6 , wherein the component composition of the martensitic stainless steel component further comprises, in terms of mass %, 8.00% or less of W. 
     
     
         9 . The martensitic stainless steel component according to  claim 6 , wherein the component composition of the martensitic stainless steel component further comprises, in terms of mass %, 1.00% or less of Ni. 
     
     
         10 . The martensitic stainless steel component according to  claim 6 , wherein the component composition of the martensitic stainless steel component further comprises, in terms of mass %, 0.10% or less of Nb. 
     
     
         11 . A method of manufacturing a martensitic stainless steel member, comprising heating a martensitic stainless steel, which has a thickness of 0.3 mm or less and has a component composition comprising, in terms of mass %, 0.10 to 0.40% of C, 1.00% or less of Si, 0.10 to 1.50% of Mn, 10.0 to 18.0% of Cr, 2.00% or less of N, and the remainder being Fe and impurities, to 860° C. or higher in a nitrogen atmosphere and maintaining as is, and then cooling the martensitic stainless steel. 
     
     
         12 . The method of manufacturing a martensitic stainless steel member according to  claim 11 , wherein the component composition of the martensitic stainless steel further comprises, in terms of mass %, 4.00% or less of Mo. 
     
     
         13 . The method of manufacturing a martensitic stainless steel member according to  claim 11 , wherein the component composition of the martensitic stainless steel further comprises, in terms of mass %, 8.00% or less of W. 
     
     
         14 . The method of manufacturing a martensitic stainless steel member according to  claim 11 , wherein the component composition of the martensitic stainless steel further comprises, in terms of mass %, 1.00% or less of Ni. 
     
     
         15 . The method of manufacturing a martensitic stainless steel member according to  claim 11 , wherein the component composition of the martensitic stainless steel further comprises, in terms of mass %, 0.10% or less of Nb. 
     
     
         16 . A method of manufacturing a martensitic stainless steel component, comprising quenching and tempering the martensitic stainless steel member manufactured by the method of manufacturing a martensitic stainless steel member according to  claim 11 .