Component made of B-Zr alloy steel

The invention relates to a component having a component part made of steel, the steel comprising, in particular, 0.30% to 0.50% by weight of C, 0.05% to 1.3% by weight of Mn, 0.001% to 0.015% by weight of P, 0.001% to 0.015% by weight of S, 0.01% to 0.8% by weight of Si, 0.3% to 1.5% by weight of Cr, 0.005% to 0.40% by weight of V, 0.0008% to 0.0050% by weight of B, 0.02% to 0.35% by weight of Al, and the balance being Fe and unavoidable impurities. The invention relates to a steel comprising, by weight, 0.0001% to 0.0200% of N, 0.01% to 0.08% of Ti, and 0.0030% to 0.0800% of Zr, the remainder being iron and unavoidable impurities, in which the B content in the steel at a depth of 5 [mu] m to 60 [mu] m is > = 80% of the B content in the steel at a depth of 500 [mu] m. 一种构件，所述构件具有由钢构成的组成部分，其中钢尤其包括0.30重量％-0.50重量％的C，0.05重量％-1.3重量％的Mn，0.001重量％-0.015重量％的P，0.001重量％-0.015重量％的S，0.01重量％-0.8重量％的Si，0.3重量％-1.5重量％的Cr，0.005重量％-0.40重量％的V，0.0008重量％-0.0050重量％的B，0.02重量％-0.35重量％的Al，0.0001重量％-0.0200重量％的N，0.01重量％-0.08重量％的Ti，和0.00