Machinability of gray iron—Mechanics of chip formation
Machinability of gray iron—Mechanics of chip formation
复制标题
DOI：
10.1080/13640461.1999.11819335
复制
发表时间：
1999-05
影响因子：
1.4
通讯作者：
R. Voigt;R. Marwanga;P. Cohen
中科院分区：
文献类型：
--
作者：
R. Voigt;R. Marwanga;P. Cohen
灰铸铁在文献中经常被描述为容易加工的材料。然而，灰铸铁的可加工性受到石墨形态和基体结构的复杂相互作用的影响，这还不是很清楚。因此，灰铸铁可加工性变化的原因仍然是虚幻的。研究了石墨形态和基体组织在灰铸铁切削过程中不连续切屑形成中的作用。比较了球墨铸铁和含铅钢的切屑形成过程，研究了连铸法生产A型和D型石墨灰铸铁的切屑形成过程。结果表明，铸铁显微组织的早期断裂发生在沿着石墨片的位置，且石墨片的位置远超前于刀具。结果还示出了标记为切削刀具前方和下方的“加工影响区”（MAZ）区域的区域。该区由一个脱粘带、一个断裂带和一个破碎带组成。对MAZ的检查表明...
Gray cast irons are frequently characterized in the literature as easily machined materials. However the machinability of gray irons is influenced by a complex interplay of graphite morphology and matrix structure that is not well understood. As a result, the causes of variability in the machinability of gray irons remain illusive. The role of both graphite morphology and matrix structure in discontinuous chip formation during machining of gray irons is investigated. Comparisons with chip formation process in ductile irons and leaded steel are made.Gray irons with both type A and D graphite produced by the continuous casting process are investigated. The results show that early fracture of cast iron microstructures occur along the graphite flakes well ahead of the cutting tool. The results also show a region labeled the “machining affected zone” (MAZ) region ahead and beneath the cutting tool. The area consists of, a decohesion zone, a fracture zone and a shattered zone. Examination of the MAZ showed that...