Bainite 球狀黑鉛鑄鐵의 磨滅特性에 미치는 殘留Mg의 影響 = Influence of Mg on the Wear Characteristics of Bainite Spheroidal Graphite Cast Iron

다국어 초록 (Multilingual Abstract)

Bainite spheroidal graphite cast iron specimens of 0∼0.054wt % residual Mg were casted into a green sand mold, 25 mm thickness Y-block.
The microstuctures of the castings were studied for mechanical properties and abrasion characteristics.
The results obtained from this study are summerized as follows:
1) Under the present expermental conditions, the relation between the abrasion speed and the abraded amount are; 0.5m/sec for 1^st abrasive wear and 2.38m/sec for 2^nd abrasive wear.
2) Increasing the residual Mg, the first abrasion speed for 2nd abrasive wear moved to the low abrasion speed.
3) The maximum amount of abraded material during 2^nd abrasive wear decreases with the increasing residual Mg content, and moves to the high abrasion speed as the residual Mg is increased over 0.042 wt %.
4) The amount of abraded materials increases with the decreasing residual Mg at abrasion speed 2.38 m/sec and with the increasing residual Mg at abrasion speed 0.62∼1.14 m/sec.
5) Increasing the abrasion speed, abrasion mechanisms are as follows; ⓐ 1^st abrasive wear ⓑ 1^st corrosive wear ⓒ 2^nd abrasive wear ⓓ 2^nd corrosive wear.
But, Under the present expermental condition the adhesive wear mechanism didn't appear.