TH51958B - Structural stainless steel plate, which has excellent corrosion resistance at the weld And a method for producing the same thing - Google Patents

Abstract

DC60(29/04/16) Structural stainless steel plate which can be produced at low cost and efficiency. high and has excellent corrosion resistance in the weld area and steel sheet production methods Stainless steel such as this will be prepared for more specific structural stainless steel sheets. Contains compositions which have percentages by mass of C0.01 to 0.03 percent, N0.01 to 0.03 percent, Si0.01 to 0.40 percent, Mn1.5 to 2.5 percent, P0.04 percent or less, S0.02. Percent or less, Al0.05 to 0.15 percent, Cr10 to 13 percent, Ni0.5 to 1.0 percentage, Ti in the amount of 4x(C+N) or more and 0.3 percent or less, and Fe and Impurities that cannot be avoided as balancing quantities, V, Ca and O in impurities. that cannot be avoided, which has been adjusted to achieve a volume of V0.05 percent or less, Ca0.0030 percent or less andO0.0080percent or less, where the F value is represented by Cr+2xSi+ 4xTi–2xNi–Mn–30x(C+N), which corresponds to the condition that the F value(less than or equal to)11 and The FFV value is expressed by Cr+3xSi+16xTi+Mo+2xAl–2xMn4x(Ni+Cu)40x(C+N)+20xV which is consistent with the conditions that the FFV value (less than or equal to) 9.0 Edit the invention summary 29/4/2016 Structural stainless steel sheets which can be produced at low cost and efficiency. high and has excellent corrosion resistance in the weld area and steel sheet production methods Stainless steel such as this will be prepared for more specific structural stainless steel sheets. It has compositions which have a percentage by mass of C0.01 to 0.03 percent, N0.01 to 0.03 percent, Si0.01 to 0.40 percent, Mn1.5 to 2.5 percent, P0.04 percent or less, S0.02. Percent or less, Al0.05 to 0.15 percent, Cr10 to 13 percent, Ni0.5 to 1.0 percentage, Ti in the amount of 4x(C+N) or more and 0.3 percent or less, and Fe and Impurities that cannot be avoided as balancing quantities, V, Ca and O in impurities. that cannot be avoided, which has been adjusted to achieve a volume of V0.05 percent or less, Ca0.0030 percent or less andO0.0080percent or less, where the F value is expressed by Cr+2xSi+ 4xTi–2xNi–Mn–30x(C+N), which corresponds to the condition that the F value?11 and the FFV value are expressed by Cr+3xSi+16xTi+Mo+2xAl–2xMn4x(Ni+Cu)40x(C+N)+20xV which is consistent with the conditions That is the FFV value?9.0

Claims (6)

Disclaimer (all) which will not appear on the advertisement page: edit 29/4/2016 1. Composition structural stainless steel sheet with mass percent C of 0.01 to 0.03 percent, N 0.01 to 0.03 percent, Si 0.10 to 0.40 percent, Mn 1.5 to 2.5 percent, P 0.04 percent or less, S 0.02 percent. Or less, Al 0.05 to 0.15%, Cr 10 to 13%, Ni 0.5 to 1.0%, Ti at 4 x (C + N) or more and 0.3% or less (C, N indicates the filling (Percentage by mass) of C and N), and Fe and the inevitable impurities as balancing quantities, where V, Ca and O in the inevitable impurity were adjusted. Given V 0.05 percent or less, Ca 0.0030 percent or less, and O 0.0080 percent or less, where the F and FFV values represented by the following formulas satisfy the condition that the F? 11 and FFV values. ? 9.0 F = Cr + 2xSi + 4xTi-2xNi-Mn-30x (C + N) FFV = Cr + 3xSi + 16xTi + Mo + 2xAl-2xMn-4x (Ni + Cu) -40x (C + N) + 20xV In this formula, each element symbol is a package of elements. (Percentage by mass) 2. Structural stainless steel plate, which is added by the mass percentage by mass of Cu 1.0 percent or less. In addition to the ingredients according to claim 1 3. Structural stainless steel sheet, which is supplemented by Mo mass 1.0 percent or less in addition to the components in Clause 1 or Clause 2. 4. Method of manufacturing structural stainless steel sheets, where steel slabs are Which contains mass percentages of C 0.01 to 0.03 percent, N 0.01 to 0.03 percent, Si 0.10 to 0.40 percent, Mn 1.5 to 2.5 percent, P 0.04 percent or less, S 0.02 percent or less, Al 0.05 to 0.15 percent, Cr 10 to 13 percent, Ni 0.5 to 1.0 percent, Ti at a volume of 4 x (C + N) or more, and 0.3 percent or less (C, N indicates the load. (Percentage by mass) of C and N), and Fe and the inevitable impurities as The balancing quantities, in which V, Ca and O in the inevitable impurity were adjusted to V 0.05% or less, Ca 0.0030% or less and O 0.0080% or less, where The F and FFV values shown by this following formula comply with the condition that the F? 11 and FFV? 9.0 values are heated at 1100 ° C to 1300 ° C and after that, hot rolling is included. To coarse hot rolling where it is ironed for at least 1 or more passes at a reduction rate of 30 percent or more. In the range of temperatures exceeding 1000 ° C, or hot rolling without annealing the hot rolled plate. Or, after annealing, hot rolled sheets at 600 to 1000 ° C and after, acid immersion is applied to hot rolled or hot rolled sheets that have been annealed, F = Cr + 2xSi + 4xTi-2xNi-Mn. -30x (C + N) FFV = Cr + 3xSi + 16xTi + Mo + 2xAl-2xMn-4x (Ni + Cu) -40x (C + N) + 20xV In this formula, each element symbol is a load of an element. (Percentage by mass) 5. Methods of manufacturing structural stainless steel sheets which are added with a mass percentage of Cu 1.0 percent or less. In addition to the steel slab components according to claim 4 6.Method of manufacturing structural stainless steel sheets which are further with Mo percent by mass 1.0 percent or less. In addition to the steel slap components in Clause 4 or Clause 5 ------------------------------ -----------------------