本文在新型高强韧性奥氏体-贝氏铁素体高碳低合金钢冲击磨料磨损试验结果基础上,讨论了奥氏体在冲击磨损过程中的作用。发现只有在具有一定韧性的高强度基体组织中一定量高度分散分布的稳定性较高的奥氏体,才对抗冲击磨损有利,而组织中大量粗大的机械稳定性较低的奥氏体,尤其是作为连续基体存在时,对冲击磨损抗力极为有害。
On the basis of the experimental results of resistance to impact-abra-sion of a newly developed austenite-bainitic ferrite dual-phase high carbon lowalloy steel with high strength, toughness and strain-hardening ability, discussionwas made on the behaviour of austenite under impact abrasion. It was found thata favourable austenite resisting to impact abrasion is only more stable and fine onewith certain high dispersion in the matrix of high strength and proper toughnesssteel. But the mechanically poor stable and coarse austenite in quantity, especiallydistributed as continuous matrix, is extremly harmful to impact abrasion resistance.
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