Concept explainers
(a)
A machine shop restricts the figure of cemented carbide grades to four for inventory control purposes. The chemical composition of these grades is as follows:
Grade 1 contains 95% WC and 5% Co; Grade 2 contains 82% WC, 4% Co, and 14% TiC; Grade 3 contains 80% WC, 10% Co, and 10% TiC; and Grade 4 contains 89% WC and 11% Co.
Specify the grade that should be used for the rough machining of gray cast iron and explain your recommendation.
(b)
A machine shop restricts the figure of cemented carbide grades to four for inventory control purposes. The chemical composition of these grades is as follows:
Grade 1 contains 95% WC and 5% Co; Grade 2 contains 82% WC, 4% Co, and 14% TiC; Grade 3 contains 80% WC, 10% Co, and 10% TiC; and Grade 4 contains 89% WC and 11% Co.
Specify the grade that should be used for the finish turning of unhardened steel and explain your recommendation.
(c)
A machine shop restricts the figure of cemented carbide grades to four for inventory control purposes. The chemical composition of these grades is as follows:
Grade 1 contains 95% WC and 5% Co; Grade 2 contains 82% WC, 4% Co, and 14% TiC; Grade 3 contains 80% WC, 10% Co, and 10% TiC; and Grade 4 contains 89% WC and 11% Co.
Specify the grade that should be used for the rough milling of aluminum and explain your recommendation.
(d)
A machine shop restricts the figure of cemented carbide grades to four for inventory control purposes. The chemical composition of these grades is as follows:
Grade 1 contains 95% WC and 5% Co; Grade 2 contains 82% WC, 4% Co, and 14% TiC; Grade 3 contains 80% WC, 10% Co, and 10% TiC; and Grade 4 contains 89% WC and 11% Co.
Specify the grade that should be used for the finish turning of brass and explain your recommendation. For each case, explain your recommendation.
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