How do tool steel differ from alloy or carbon steels a. Alloy concentration b. H

Question

How do tool steel differ from alloy or carbon steels a. Alloy concentration b. Hardenability c. Alloy carbides in the Martensite d. Higher ductility and elongation e. Both b and d What material would you choose for a dewalt jack Hammer blade a. Hot work b. Shock c. Mold d. Hammer steel e. Cold work The main phase of hardened tool steel is a. Austenite b. Ferrite c. Pearlite d. Martensite e. Carbide What is the minimum carbon content for hardening in a carbon steel a. 40% b. 4% c. .4% d. .04% e. .004% Hot finished steel arc delivered in an a. Hardened state b. Annealed stale c. Normalized state d. Tempered state e. Carburized

Explanation / Answer

26) different concentration of alloy in tool steel ,allloy steel and carbon steel.

in Tool steel contains vanadium, molybdenum, tungsten, and cobalt in different amount to increase the heat resistance and durability of the steel.

in Alloy steel small amounts of one or more alloying elements such as manganese, silicon, nickel, titanium, copper, chromium and aluminum added.

in Carbon steel main interstitial alloying constituent is carbon.

so option A is correct

27) shock

The high shock resistance and good hardenability are provided by chromium-tungsten, silicon-molybdenum, silicon-manganese alloying. and it is a heat-treated steel for strength and durability.

28) carbide

29) minimum 0.4 % carbon

30) c) normalized state

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