CAJ | 학술논문

对控轧控冷工艺生产的16 mm厚度规格NM450耐磨钢板进行930℃+保温20 min淬火、200℃+保温25 min回火处理，并对热轧态、淬火态及回火态的钢板取样进行组织性能分析。结果表明，热轧后钢板组织为铁素体+珠光体以及少量贝氏体，淬火组织为马氏体+残余奥氏体以及少量贝氏体，回火组织为马氏体+残余奥氏体+针状贝氏体。试验钢淬火+回火处理后Rm 1378 MPa，A5021.5%，-20℃夏比冲击功61 J，表面布氏硬度443 HBW，具有良好的综合力学性能。
대공알공랭공예생산적16 mm후도규격NM450내마강판진행930℃+보온20 min쉬화、200℃+보온25 min회화처리，병대열알태、쉬화태급회화태적강판취양진행조직성능분석。결과표명，열알후강판조직위철소체+주광체이급소량패씨체，쉬화조직위마씨체+잔여오씨체이급소량패씨체，회화조직위마씨체+잔여오씨체+침상패씨체。시험강쉬화+회화처리후Rm 1378 MPa，A5021.5%，-20℃하비충격공61 J，표면포씨경도443 HBW，구유량호적종합역학성능。
The heat treatment process quenching at 930℃+holding for 20 mins and tempering at 200℃+holding for 25 mins were carried out for 16 mm NM450 wear-resistant steel plate produced by controlled rolling and controlled cooling process. The microstructure and properties of as-rolled, quenched, and tempered steel plates were sampled and analyzed. The results showed that, there were ferrite+pearlite and a little of bainite in the microstructure of as-rolled plate, martensite+retained austenite and a small amount of bainite in the microstructure of quenched plate, and martensite+retained austenite+acicular bainite in the microstructure of tempered plate. After the tested steel was quenched and tempered, its tensile strength was 1 378 MPa, its elongation A50 was 21.5%, its charpy impact energy at-20℃was 61 J, its brinell hardness on plate surface was 443 HBW. The steel plate possesses a good comprehensive mechanical property.