| 摘要 |
The invention concerns a method for making an abrasion-resistant steel part consisting of 0.1 % <= C <= 0.23 %; 0 % <= Si <= 2 %; 0 % <= AI <= 2 %; 0.5 % <= Si + AI <= 2 %; 0 % <= Mn <= 2.5 %; 0 % <= Ni <= 5 %; 0 % <= Cr <= 5 %; 0 % <= Mo <= 1 %; 0 % <= W <= 2 %; 0.05 % <= Mo +W/2 <= 1 %; 0 % <= B <= 0.02 %; 0 % <= Ti <= 0.67 %; 0 % <= Zr <= 1.34 %; 0.05 % < Ti + Zr/2 <= 0.67 %; 0 % <= S <= 0.15 %; N < 0.030, optionally 0 % to 1.5 % of Cu; optionally Nb, Ta and V such that Nb/2 + Ta/4 + V <= 0.5 %; optionally Se, Te, Ca, Bi, Pb contents <= 0.1 %; the rest being iron and impurities. Additionally: 0.095 % <= C* = C - Ti/4 - Zr/8 + 7xN/8, Ti + Zr/2 - 7xN/2 1.8, with K = 1 if B >= 0. 0005 % and K = 0 if B 0.5 °C/s between AC3 and T = 800 - 270xC* - 90xMn -37xNi - 70XCr - 83x(Mo + W/2) and about T-50 °C; then cooling at a speed 0.1 < Vr < 1150xep-1.7 between T and 100 °C, (ep = thickness of plate in mm); cooling down to room temperature and optionally planishing. The invention also concerns the resulting plate.
|
