The influence of microstructural directionality on machining behaviour is examined for two commercial steel plates with respect to both ferrite-pearlite banding and inclusions, using orthogonal cutting tests. In relation to machining forces, chip morphology, and surface finish, one steel exhibited marked anisotropy, and comparisons with a non-banded steel indicated that the anisotropy was primarily due to the presence of ferrite-pearlite banding. Reasons for the anisotropy are briefly discussed in terms affracture energy, and the difficulties of machining in certain directions and relevance of the results to practical machining operations are also highlighted.
Get full access to this article
View all access options for this article.
References
1.
DAHIW.., HENGSTENBERGH., and DURENC.: Stahl Eisen, 1968, 88, 364–377.
2.
GRANCiER. A.: Metall. Trans., 1971,2, 417–426.
3.
HEISERF. A. and HERTZBERGR. W.: J. Iron Steel Inst., 1971,209,975–980.
4.
ItG.. WILAAS: J. Aust. Inst. Met., 1973, 18, 47–52.
5.
DUMAJ. A.: Heat Treat. Forg., 1938, 24, 174–181.
6.
POMEYJ.: Rev. Metall., 1962, 59, 255–259.
7.
LANEJ. D., STAMW., and WOLFEK. B.: ‘Machinability’, 65–70; 1967, London, The Iron and Steel Institute.
8.
AMNSTERH. S. and CLARYP. E.: J. West Scotland Iron Steel Ina., 1962, 70, 63–82.
9.
BRYDENH. L.: Trans. ASME, 1957, 79, 915–918.
10.
VAN VLACKL. H.: Trans. ASM, 1953, 45, 741–753.
11.
GAYDOSR.: J. Met., 1964, 16, 972–977.
12.
RAMASWAMIR.: Int. J. Mach. Tool Des. Res., 1971, 11, 75–83.
13.
NAICAYAMAK., SHAWM. C., and BREWERR. C.: Ann. CIRP, 1966, 14, 211–223.
14.
TRENTE. M.: ‘Machinability‘, 11–18; 1967, London, The Iron and Steel Institute.
15.
BETZF.: ‘Proc. int. conf. on surface technology‘, 372–385; 1973, Dear-born, Mich., Society of Manufacturing Engineers.
16.
PEKELHARINGA. J.: Ann. CIRP, 1974, 23, 207–212.
17.
HOVINGAH. J.: Ann. CIRP, 1971, 19, 341–345; 1973, 22, 31–32.
18.
HEGINBOTHAMW. B. and comas. L.: Proc. Inst. Mech. Eng., 1961, 175, 892–905.
19.
WILLIAMSJ. E., SMARTE. F., and MILNERD. R.: Meta/hi/gig, March 1970, 81, 89–93.
20.
ARMAREGOE. J. A. and BROWNR. H.: ‘The machining of metals‘, 156–204; 1969, Englewood Cliffs, NJ, Prentice-Hall.
