leometwu的部落格

里歐班的同學需弄懂:

C.E.=Carbon Equivalent 碳(的相)當量   相當於有這麼多的碳   也可譯為 等效碳含量

C. E.= C + (1/3)*Si    Si 促進灰口凝固的影響力 只有C的三分之一, 全折算成C的影響力 --> C.E.

              This equation shows Si has the similar power of  promoting graphite formation as C does. But its influence is only 1/3 of that of carbon.  CE value is an important index  of gray iron. Too high ----> too many graphite flakes and too little pearlite in matrix ---> too low in tensile strength and hardness (~ wear resistance)     Too low ---> produces white iron and causes machining difficulty. 

C.E.值為鑄鐵灰口化傾向或強度硬度之重要指標.  太高, 石墨多, 強度不足.  太低, 生白口, 不易加工.