润滑科技信息平台

专利摘要

本发明提供一种兼具优异的耐磨性和宽幅弯曲加工性的耐磨钢板。 1 .一种耐磨钢板,其具有规定的成分组成,其特征在于,从表面至1mm深度的马氏体的体积分数为90%以上。从表面到1毫米深度的布氏硬度为420至560 HBW 10/3000; 以及从表面到1mm深度的宽度方向上的硬度差,所述硬度差定义为在板宽度方向上彼此相距10mm的距离的两点之间的维氏硬度差,为 30 Hv10 或更低。 ......

基本信息

专利类型:
发明专利
申请/专利号:
AU2021278605
申请日期:
2021-05-25
专利申请人:
分类号:
C22C38/00; C21D6/00; C21D8/02; C22C38/38; C22C38/58
发明/设计人:
权利要求: 1. An abrasion-resistant steel plate comprising a chemical composition containing, in mass%,5 C: 0.15 % to 0.30 %,Si: 0.05 % to 1.00 %,Mn: 0.50 % to 2.00 %,P: 0.020 % or less,S: 0.010 % or less,10 Al: 0.01 % to 0.06 %,Cr: 0.10 % to 1.00 %, andN: 0.0100 % or less,with a balance consisting of Fe and inevitable impurities,wherein a volume fraction of martensite at a depth of 1 mm from a 15 surface of the abrasion-resistant steel plate is 90 % or more,hardness at a depth of 1 mm from the surface is 420 HBW 10/3000 to 560 HBW 10/3000 in Brinell hardness, anda transverse direction hardness difference is 30Hvl0 or less in Vickers hardness, the transverse direction hardness difference being defined as a 20 difference in the hardness at a depth of 1 mm from the surface between two points adjacent at intervals of 10 mm in a transverse direction of the abrasionresistant steel plate.2. The abrasion-resistant steel plate according to claim 1, wherein 25 the chemical composition further contains, in mass%, one or more selected from the group consisting ofNb: 0.005 % to 0.020 %,Ti: 0.005 % to 0.020 %, andB: 0.0003 % to 0.0030 %.303. The abrasion-resistant steel plate according to claim 1 or 2, wherein the chemical composition further contains, in mass%, one or more selected from the group consisting ofCu: 0.01 % to 0.5 %,35 Ni: 0.01 % to 3.0 %,Mo: 0.1 % to 1.0 %,V: 0.01 % to 0.10 %,W: 0.01 % to 0.5 %, andCo: 0.01 % to 0.5 %.4. The abrasion-resistant steel plate according to any one of claims 1 to 3, wherein the chemical composition further contains, in mass%, one or more selected from the group consisting ofCa: 0.0005 % to 0.0050 %,Mg: 0.0005 % to 0.0100 %, andREM: 0.0005 % to 0.0200 %.5. A method of producing an abrasion-resistant steel plate, the method comprising:heating a steel material to a heating temperature that is an Ac3 transformation point or more and 1300 °C or less, the steel material having a chemical composition containing, in mass%,C: 0.15 % to 0.30 %,Si: 0.05 % to 1.00 %,Mn: 0.50 % to 2.00 %,P: 0.020 % or less,S: 0.010 % or less,Al: 0.01 % to 0.06 %,Cr: 0.10 % to 1.00 %, andN: 0.0100 % or less,with a balance consisting of Fe and inevitable impurities;hot rolling the heated steel material to obtain a hot-rolled steel plate; andsubjecting the hot-rolled steel plate to quenching,wherein the quenching is (a) direct quenching of cooling the hot-rolled steel plate from a cooling start temperature that is an Ar3 transformation point or more to a cooling stop temperature that is a Mf point or less or (b) reheating quenching of cooling the hot-rolled steel plate, reheating the cooled hot-rolled steel plate to a reheating temperature that is the Ac3 transformation point or more and 950 °C or less, and cooling the reheated hot-rolled steel plate from the reheating temperature to a cooling stop temperature that is the Mf point or less, andin a cooling process in the quenching, a difference in average cooling rate between a center position and a 1/4 position of the hot-rolled steel plate in the transverse direction and a difference in average cooling rate between the center position and a 3/4 position of the hot-rolled steel plate in the transverse direction are each 5 °C/s or less.6. The method of producing an abrasion-resistant steel plate according to claim 5, wherein the cooling stop temperature in the quenching is less than (Mf point - 100 °C), andthe method comprises, after the quenching, tempering the quenched hot-rolled steel plate at a tempering temperature that is (Mf point - 80 °C) or more and (Mf point + 50 °C) or less.7. The method of producing an abrasion-resistant steel plate according to claim 6, wherein in the tempering, the quenched hot-rolled steel plate is held at the tempering temperature for 60 s or more.8. The method of producing an abrasion-resistant steel plate according to claim 6 or 7, wherein an average heating rate in the tempering is 2 °C/s or more.9. The method of producing an abrasion-resistant steel plate according to claim 5, wherein the cooling stop temperature in the quenching is Mf point or less and (Mf point - 100 °C) or more, andthe method comprises, after the quenching, air cooling the quenched hot-rolled steel plate.10. The method of producing an abrasion-resistant steel plate according to any one of claims 5 to 9, wherein the chemical composition further contains, in mass%, one or more selected from the group consisting ofNb: 0.005 % to 0.020 %,Ti: 0.005 % to 0.020 %, andB: 0.0003 % to 0.0030 %.11. The method of producing an abrasion-resistant steel plate according to any one of claims 5 to 10, wherein the chemical compositionfurther contains, in mass%, one or more selected from the group consisting ofCu: 0.01 % to 0.5 %,Ni: 0.01 % to 3.0 %,Mo: 0.1 % to 1.0 %,5 V: 0.01 % to 0.10 %,W: 0.01 % to 0.5 %, andCo: 0.01 % to 0.5 %.12. The method of producing an abrasion-resistant steel plate 10 according to any one of claims 5 to 11, wherein the chemical composition further contains, in mass%, one or more selected from the group consisting of Ca: 0.0005 % to 0.0050 %, Mg: 0.0005 % to 0.0100 %, and REM: 0.0005 % to 0.0200 %.