Stainless steel brake disc and method for production thereof

A method for producing a stainless steel brake disc comprising, in % by mass, 0.030 to 0.080% of C, 0.05% to 1.0% of Si, 1.0 to 1.5% of Mn, 0.035% or less of P, 0.015% or less of S, 11.0 to 14.0% of Cr, 0.01 to 0.50% of Ni, 0.001 to 0.15% of V, 0.10% or less of Nb, 0.05% or less of Ti, 0.05% or less of Zr, 0.05% or less of Al, 0.015 to 0.060% of N, 0.0002% or more and 0.0050% or less of B, and 0.0080% or less of O, wherein an AT value of equation 1 is 0.055 or more and 0.090 or less, equation 2 is satisfied, and the balance is Fe and inevitable impurities, to a temperature of 950° C. or more and 1050° C. or lower;

• retaining at the heating temperature for more than 0.1 second and 5 seconds or less;
• cooling at a cooling rate of 100° C./s or more;
• and setting a duration from the start of heating up to the start of cooling of 50 seconds or less:
• AT=C+0.8(N−B) (1)
• PV=1.2Ti+0.8Zr+Nb+1.1Al+O≦0.1 (2)
• where N, B, Ti, Zr, Nb, Al, and O in equation 1 and equation 2 each means the element content (% by mass).