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논문 기본 정보

자료유형
학술저널
저자정보
Linjun Jiang (Soochow University) Changjun Chen (Soochow University) Min Zhang (Soochow University)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.29 No.1
발행연도
2023.1
수록면
141 - 156 (16page)
DOI
10.1007/s12540-022-01218-4

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Traditional maraging steels are not able to satisfy the development of modern industry. Optimizing the properties of maragingsteels is now a fascinating field. In this paper, a novel high alloying element maraging steel (HA-MS1) is successfullyprepared by laser metal deposition (LMD). Then differential scanning calorimetry (DSC) phase transformation analysis onthe as-deposited (AF) specimens was conducted and the reasonable aging heat treatment (AT) and solution + aging heattreatment (ST + AT) were subsequently proposed. These specimens were characterized by scanning electron microscopy(SEM), electron back-scattered diffraction (EBSD), X-ray diffraction (XRD), hardness test, wear test and potentiodynamicpolarization test for microstructure, phase, hardness, tribological and corrosive properties. The grain refinement and a largenumber of Ni3(Ti, Mo) intermetallic compounds in the matrix after AT resulted in superior hardness and wear resistance,while leading to poor corrosion resistance. Thereinto, specimens subjected to 460 °C AT possessed the ideal hardness andwear resistance of 638 HV and 1.75 × 10−6 mm3/Nm, respectively, with an increase of 68% and 118% compared to theas-deposited specimens. The austenite ( ) content of the ST + AT specimens increased drastically, reaching 23.1% for the820 °C ST + 460 °C AT specimens. This phenomenon resulted in a decreasing compatibility of mechanical properties thanthe AT specimens, but the specimens aged at 490 °C after solution treatment at 820 °C had the best corrosion resistance,mainly due to their good surface and more densification.

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