Effect of casting technology on microstructure and phases of high carbon high speed steel |
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| Authors: | Zhang Tianming Wang Qinjuan Song Xuding Fu Hanguang |
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| Affiliation: | *Zhang Tianming1,Wang Qinjuan2,Song Xuding1 and Fu Hanguang3(1.School of Engineering Machinery,Chang'an University,Xi'an 710064,Shaanxi,China,2.Fujian Communication Technology College,Fuzhou 350007,Fujian,3.School of Materials Science and Engineering,Beijing University of Technology,Beijing 100124,China) |
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| Abstract: | The as-cast microstructures of high carbon high speed steels (HC-HSS) made by sand casting,centrifugal casting and electromagnetic centrifugal casting, respectively, were studied by using of optical microscopy (OM) and D/max2200pc X-ray diffraction. The results show that the microstructure of as-cast HCHSS is dominated by alloy carbides (W2C, VC, Cr7C3), martensite and austenite. The centrifugal casting and electromagnetic centrifugal casting apparently improve the solidification structure of HC-HSS. With the increase of magnetic intensity (B), the volume fraction of austenite in the HC-HSS solidification structure increases significantly while the eutectic ledeburite decreases. Moreover, the secondary carbides precipitated from the austenite are finer with more homogeneous distribution in the electromagnetic centrifugal castings. It has also been found that the lath of eutectic carbide in ledeburite becomes finer and carbide phase spacing in eutectic ledeburite increases along with the higher magnetic field strength. |
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| Keywords: | high carbon high speed steel electromagnetic centrifugal casting solidification structure phase |
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