模數與斷面形狀對淬火硬度的影響模數

Effect of Modulus and Section Shape on Quenching Hardness

溫東成(Dong-Cherng Wen)

《中華技術學院學報》 21期 (2000/09) Pp. 39-45

https://doi.org/10.7095/JCIT.200009.0039

摘要

本研究以模數與斷面形狀兩項參數探討球墨鑄鐵圓柱及正方形柱試棒的淬火硬度在表面及中心部位的變化，試棒經900°C保溫60分鐘的沃斯田鐵化後直接淬冷於水槽中，再分別量測試棒1/2高度截面處中心點及具周緣2.5 mm的硬度值。結果顯示試棒的淬火硬度隨模數增加而下降，斷面形狀的改變除使位在隅角的淬火硬度稍有增加外，期他部位的淬火硬度則變化不大，而在相同的模數下圓柱及正方形柱試棒具有大約相同的淬火硬度。

關鍵字

淬火硬度 ； 模數 ； 斷面形狀

並列摘要

The effect of modulus and section shape on quenching hardness of circle and square shape ductile cast iron bars was study. The specimens were water quenched after austenitized at 900 °C for 60 min, then the Rockwell hardness at the center and surface of section at half length of bar were measured. The results show that the quenching hardness decreased with increasing in modulus of specimen. The change in hardness due to change in section shape was not obviously. The approximately equal hardness could be obtained under the same modulus of circle and square shape ductile cast iron bars.

並列關鍵字

hardness ； modulus ； section shape