Cyclic Quenching Treatment to Improve Strength–Ductility Combinations in 18CrNiMo7-6 Steel
Source abstract
Abstract
A novel cyclic quenching process was proposed to refine the microstructure and improve the mechanical properties of 18CrNiMo7-6 steel. This study aimed to investigate the mechanism of microstructure evolution under cyclic quenching treatment. In addition, the effect of grain refinement on the strengthened mechanical properties was discussed. The results demonstrated that the cyclic quenching treatment resulted in a finer and more uniform distribution of average austenite and gradually decreased its grain size from 14.0 to 3.4 μm as the number of cycles increased from 0 to 3. The ultimate tensile strength, total elongation, and hardness value increased from 1162 to 1397 MPa, 6.2 to 9.69%, and from 392 to 416 HV, respectively. According to the significant improvement in mechanical properties of the experiment steel, it was found that multi-cycle treatment played an important role in enhancing its mechanical properties. The excellent combination of strength–ductility was exhibited by the experimental steel after three passes of treatment. This confirms the important role of cyclic quenching in optimizing 18CrNiMo7-6 steel.
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Research context
OpenAlex topics: Microstructure and Mechanical Properties of Steels · Hydrogen embrittlement and corrosion behaviors in metals · High Temperature Alloys and Creep
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (42)
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