Austenite고 Mn강의 내마모성을 조사하기 위하여 abrasive 마모시험기를 제작하여 단위하중당 마모율(M)를 측정하였다. Bulk의 경도(H_B), 마찰마모면의 경도(H_(A·S)) 및 현미경 조직도 조사하여 내마모성과의 관계를 연구하였다. Bulk의 경도(H_B), 마찰마모된 면의 경도(H_(A·S))와 단위하중당 마모율(M) 사이에는 각각 다음과 같은 관계가 성립함을 알았다. 1) M×10^5=(14.008±1.758)-(0.0291±0.046) H_(A·S) ㎎/㎝-㎏. 2) M=24/1000 (60)^(-n)×1/H_B ㎎/㎝-㎏. n: 가공경화계수 1)식은 실험식이며 2)식은 강의 본래의 성질과 관계된 semi-empirical식이다. 현미경 조직을 관찰하여, 결정입도는 내마모성과 무관함을 알 수 있었고, 탄화물 간 거리(d)는 현저한 영향을 미치며 그 관계는 다음과 같다. 3) M×10^5=(5.4±0.3)-(43.0±6.07)1/√d ㎎/㎝-㎏.

In order to investigate into the wear-resisting property of the austenitie high manganese steel, the wear rate per unit load (M) was measured using the wear tester manufactured to simulate the abrasive condition. Hardness of the bulk (H_B) and the abraded surface (H_(A·S)) and the metallographic structure were also studied in relation to the abrasive wear resistance of the steel. It is shown the wear rate per unit load (M) is related with each of the bulk hardness and the abraded surface hardness as follow expressions: 1) M×10^5=(14.008±1.758)-(0.0291±0.046) H_(A·S) ㎎/㎝-㎏. 2) M=2/1000(60)^(-n)×1/H_B ㎎/㎝-㎏. Where n is strain-hardening coefficient. Expression 1) is empirical while expression 2) is semiempirical formula which has a relation with the intrinsic property of the steel. On the view of microstructure of the steel, it is found the hnitial grain size (r) has no effect on the wear-resisting property of the Steel but the intercarbide spacing (d) has an marked influence on the wear-resistance. And the obtained relationship is as follow; 3) M×10^5=(5.4±0.3)-(43.0±6.07)1/√d ㎎/㎝-㎏.