| Structures and Properties of High-Carbon High Speed Steel by RE-Mg-Ti Compound Modification |
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| 作者姓名： | FUHan-guang FUDing-mei ZouDe-ning XINGJian-dong |
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| 作者单位： | [1]Xi＇anJiaotongUniversity [2]UniversityofScience＆TechnologyBeijing [3]Xi＇anJiaotongUniversity |
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| 摘 要： | The effects of rare earths ( RE )-Mg-Ti compound modification on the structures and properties of high-carbon high speed steel ( HSS ) were researched. The impact toughness (ak), the fracture toughness (Klc)andt hreshold of fatigue crack growth (△Kth)are tested. The thermal fatigue test is done on a self-straining thermal fatigue tester, the wear test is done on a high temperature wear test machine. The results show that the matrix can be reftned by the RE-Mg-Ti compound modification, the euteetic carbides are inclined to spheroidicize and are distributed everdy, the morphology and distribution of eutectic carbides are improved by appropriate RE-Mg-Ti complex modification. After RE-Mg-Ti compound modification, a little effects can be found on the strength, hardness and red hardness, but the fractare toughness(Klc) and threshold of fatigue crack growth (△Kth) are improved in the meantime, the impact toughness (ak) is increased by over one time, and the rasistanee to thermal fatigue and wear resistanee at an elevated temperature are remarkably improved.
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| 关 键 词： | 高碳高速钢 RE-Mg-Ti 复合修饰 热疲劳 高温抗磨损性 |
Structures and properties of high-carbon high speed steel by RE-Mg-Ti compound modification |
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| FUHan-guang FUDing-mei ZouDe-ning XINGJian-dong.Structures and Properties of High-Carbon High Speed Steel by RE-Mg-Ti Compound Modification[J].Journal of Wuhan University of Technology. Materials Science Edition,2004,19(2):48-51. |
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| Authors: | Fu Han-guang Fu Ding-mei Zou De-ning Xing Jian-dong |
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| Affiliation: | (1) Xi’an Jiaotong University, 710049 Xi’an, China;(2) University of Science & Technology Beijing, China |
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| Abstract: | The effects of rare earths (RE)-Mg-Ti compound modification on the structures and properties of high-carbon high speed steel
(HSS) were researched. The impact toughness (αk), the fracture toughness (K1c) and threshold of fatigue crack growth (ΔKth) are tested. The thermal fatigue test is done on a self-straining thermal fatigue tester, the wear test is done on a high
temperature wear test machine. The results show that the matrix can be refined by the RE-Mg-Ti compound modification, the
eutectic carbides are inclined to spheroidicize and are distributed evenly, the morphology and distribution of eutectic carbides
are unproved by appropriate RE-Mg-Ti complex modification. After RE-Mg-Ti compound modification, a little effects can be found
on the strength, hardness and red hardness, but the fracture toughness (K1c) and threshold of fatigue crack growth (ΔKth) are improved in the meantime, the impact toughness (αk) is increased by over one time, and the resistance to thermal fatigue and wear resistance at an elevated temperature are
remarkably improved. |
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| Keywords: | high-carbon high speed steel RE-Mg-Ti compound modification thermal fatigue high temperature wear resistance |
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