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| ABRASIVE WEAR RESISTANCE OF Cr-FAMILY WHITE CAST IRONS |
| by FANG Liang; RAO Qichang; ZHOU Qingde (Department of Mechanical Engineering; Xi'an Jiaotong University) (Manuscript received 11 August; 1985; revised manuscript 26 April; 1986) |
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Cite this article:
by FANG Liang; RAO Qichang; ZHOU Qingde (Department of Mechanical Engineering; Xi'an Jiaotong University) (Manuscript received 11 August; 1985; revised manuscript 26 April; 1986). ABRASIVE WEAR RESISTANCE OF Cr-FAMILY WHITE CAST IRONS. Acta Metall Sin, 1987, 23(6): 575-580.
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Abstract Abrasive wear resistance and fracturetoughness of white cast irons containing 2, 9, 15, 20 and 27 wt-%Cr have been investigated. Different contents of Cr and C have been added to the irons to keep the eutectic carbide constant (20—25%). Martensitic and austenitic matrices have been obtained by means of heat treatment. The results show that M_3C will transform to M_7C_3 and the microhardness of M_7C_3 itself will increase while the Cr/C ratio in iron increases. Meanwhile, the morph01ogy of carbides changes from Continuous network to rod or plate-like. All these make the carbides protect the matrices effectively, and improve the abrasive wear resistance of materials in pin-disc and wet rubber wheel wear tests. Wear resistance and fracture toughness have been discussed combinedly, that gives a general guide for designing and choosing wear resistant materials.
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Received: 18 June 1987
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