Texas MMET 207 Assessment 2 Solved 100%
Correct
Cold Work - ANS-O, W, A, D
O series (Cold Work) - ANS-Oil Hardening
O1, O2, O6, O7
W series (Cold Work) - ANS-Water Hardening
W1, W2, W5
A series (Cold Work) - ANS-Medium Alloy Air Hardening
A2, A4, A6, A8, A9, A10, A11
D series (Cold Work) - ANS-High Carbon, High Chromium
D2, D3, D4, D5, D7
Shock Resisting - ANS-S series
S1, S2, S4, S5, S6, S7
Hot Work - ANS-H, P
H Series (Hot Work) - ANS-H10-H19 Chromium Types
H20-H39 Tungsten Types
H40-H59 Molybdenum Types
P series (Hot Work) - ANS-Molded
P6, P20, P21
High Speed - ANS-M, T
M series (High Speed) - ANS-Molybdenum Types
M1, M2, M3-1, M3-2, M4, M6, M7, M10, M33, M36, M41, M46, M50
T series (High Speed) - ANS-Tungsten Types
T1, T4, T5, T6, T8, T15
Special Purpose - ANS-L series
L2, L6
Carbon steel Hardening Properties - ANS-Hardenability: Biggest back curve/worst
hardenability
Hardness: Sharp drop as Temper Temp Increases
Abrasion Resistance: Wear volume grows the most over time
, Alloy Steel Hardening Properties - ANS-Hardenability: Middle Largest Back
curve/middle hardenability
Hardness: Slow decline
Abrasion Resistance: Medium wear volume amount
Tool Steels - ANS-Hardenability: Smallest Back curve/best hardenability
Hardness: Goes down a little, then back up, then sharp drop
Abrasion Resistance: Least amount of wear volume
Safety in Hardening - ANS-Risk of Damaging from hardneing (quench cracks)
Eutectic Structures - ANS-spread out carbide structures
Eutectic Networks - ANS-Long multiple chains of carbide structures
Severe Banding (cause and effect) - ANS--caused by segregation of the alloying
elements during solidification
-causes anisotropy in the tensile ductility and impact energy of the steels
Why are eutectic material and severe banding undesirable? - ANS-Makes the tool
steel crack easier
Hardening Characteristics (4) - ANS-Safety in Hardening
Depth of Hardening
Size change in hardening
Resistance to decarburization
what is secondary hardening? - ANS-the unintentional increase of hardness during
tempering or machining of some hardened high alloy steel
Depth of Hardening - ANS-through hardening, Hardenability
Size change in hardening - ANS-Very important for design
what is decarburization - ANS-if a steel with a relatively high carbon content (~1%)
is heated in a furnace that has a carbon-free atmosphere (air), carbon will tend to
diffuse out of the steel
Hardening- Use Characteristics - ANS-Resistance to heat softening
Wear Resistance
Toughness
Machinability
Resistance to heat softening - ANS-the capability of an alloy to maintain its strength
when exposed to high temperature
Wear resistance - ANS-a material's ability to resist material loss by some
Correct
Cold Work - ANS-O, W, A, D
O series (Cold Work) - ANS-Oil Hardening
O1, O2, O6, O7
W series (Cold Work) - ANS-Water Hardening
W1, W2, W5
A series (Cold Work) - ANS-Medium Alloy Air Hardening
A2, A4, A6, A8, A9, A10, A11
D series (Cold Work) - ANS-High Carbon, High Chromium
D2, D3, D4, D5, D7
Shock Resisting - ANS-S series
S1, S2, S4, S5, S6, S7
Hot Work - ANS-H, P
H Series (Hot Work) - ANS-H10-H19 Chromium Types
H20-H39 Tungsten Types
H40-H59 Molybdenum Types
P series (Hot Work) - ANS-Molded
P6, P20, P21
High Speed - ANS-M, T
M series (High Speed) - ANS-Molybdenum Types
M1, M2, M3-1, M3-2, M4, M6, M7, M10, M33, M36, M41, M46, M50
T series (High Speed) - ANS-Tungsten Types
T1, T4, T5, T6, T8, T15
Special Purpose - ANS-L series
L2, L6
Carbon steel Hardening Properties - ANS-Hardenability: Biggest back curve/worst
hardenability
Hardness: Sharp drop as Temper Temp Increases
Abrasion Resistance: Wear volume grows the most over time
, Alloy Steel Hardening Properties - ANS-Hardenability: Middle Largest Back
curve/middle hardenability
Hardness: Slow decline
Abrasion Resistance: Medium wear volume amount
Tool Steels - ANS-Hardenability: Smallest Back curve/best hardenability
Hardness: Goes down a little, then back up, then sharp drop
Abrasion Resistance: Least amount of wear volume
Safety in Hardening - ANS-Risk of Damaging from hardneing (quench cracks)
Eutectic Structures - ANS-spread out carbide structures
Eutectic Networks - ANS-Long multiple chains of carbide structures
Severe Banding (cause and effect) - ANS--caused by segregation of the alloying
elements during solidification
-causes anisotropy in the tensile ductility and impact energy of the steels
Why are eutectic material and severe banding undesirable? - ANS-Makes the tool
steel crack easier
Hardening Characteristics (4) - ANS-Safety in Hardening
Depth of Hardening
Size change in hardening
Resistance to decarburization
what is secondary hardening? - ANS-the unintentional increase of hardness during
tempering or machining of some hardened high alloy steel
Depth of Hardening - ANS-through hardening, Hardenability
Size change in hardening - ANS-Very important for design
what is decarburization - ANS-if a steel with a relatively high carbon content (~1%)
is heated in a furnace that has a carbon-free atmosphere (air), carbon will tend to
diffuse out of the steel
Hardening- Use Characteristics - ANS-Resistance to heat softening
Wear Resistance
Toughness
Machinability
Resistance to heat softening - ANS-the capability of an alloy to maintain its strength
when exposed to high temperature
Wear resistance - ANS-a material's ability to resist material loss by some
