Chapter 22

Question 1

what ceramics are made of. Used as a metallic binder.

Answer 1

Pure Aluminum

Question 2

low level of chemical reaction with iron that better finish imparted by a cermet.

Answer 2

BUE (built-up edge)

Question 3

also called sintered (or cemented) carbides because they are manufactured by powder metallurgy techniques. Nonferrous alloys.

Answer 3

Carbides

Question 4

properly known as satellite tools, are cobalt-rich, chromium-tungsten-carbon cast alloys having properties and applications in the intermediate range between high-speed steel and cemented carbides.

Answer 4

Cast cobalt alloy

Question 5

cutting tool material

Answer 5

Ceramics

Question 6

cutting tool material. Ceramic material in a metal binder.

Answer 6

Cermets

Question 7

one of the most effective coating processes for improving the life and performance of tools are the chemical vapor decomposition (CVD). The CVD process, used to deposit a protective coating onto carbides inserts, has been benefiting the metal removal industry for many years and is now being applied with equal success to steel.

Answer 7

Chemical vapor deposition-

Question 8

currently the most extensively used tools materials. Cost only about 15-20 percent more than uncoated tools, so a modest improvement in performance can justify the added cost.

Answer 8

Crater tools

Question 9

wear on the rake face of the tool.

Answer 9

Crater wear-

Question 10

cutting tool

Answer 10

Cubic boron nitride

Question 11

acts primarily as a coolant and secondly as a lubricant, reducing the friction effects as the tool/chip interface and the work/flank regions. Also carry away the chips and provide friction (and force) reductions in regions where the bodies of the tools rub against the work piece.

Answer 11

Cutting fluids

Question 12

what the success in metal cutting depends upon. Available with a variety of properties, performance capabilities, and cost.

Answer 12

Cutting tool material

Question 13

a predominant wear mode of PCBN tools

Answer 13

Depth-of –cut line (DCL)

Question 14

the hardest material known.

Answer 14

Diamonds

Question 15

one of the most important properties for tool steels.

Answer 15

Hot hardness

Question 16

high-alloy steel was superior to tool steel in that it retains its cutting ability at temperature up to 1100°F, exhibiting good “red hardness”.

Answer 16

High speed steel (HSS)

Question 17

a much maligned term which has many different meanings but generally refers to the ease with which a metal can be machined to an acceptable surface finish.

Answer 17

Machinability

Question 18

processes are carried out under a hard vacuum, with the work pieces heated to temperatures in the range of 200 to 485°C (400 to 900°F).

Answer 18

Physical vapor deposition (PVD)

Question 19

a high temperature high/high pressure process. Consist of a thin layer of fine-grain-size diamond particles sintered together and metallurgically bonded to a cemented carbide substrate.

Answer 19

Polycrystalline

Question 20

cutting tool material. Has a cutting edge of 100 A or less. Used for precision machining of large mirrors, to machine brass watch faces, to slice biological materials into thin films for viewing in transmission electron microscopes. The ability to form a sharp edge of cleavage.

Answer 20

Single-crystal

Question 21

also called cemented. Manufactured by powder metallurgy techniques.

Answer 21

Sintered

Question 22

known as cast cobalt alloy. Are cobalt-rich chromium-tungsten-carbon cast alloys having properties and applications in the intermediate range between high-speed steel and cemented carbides.

Answer 22

Satellite

Question 23

a chemical reaction done in a chemical vapor (CVD) process.

Answer 23

Titanium nitrate (TiN)

Question 24

a part on a tool that is said to be “worn out”.

Answer 24

Wear land