Hardfacing Flashcards
What does the term hard facing mean?
A)The application of an alloy diocese corrosion
B)Too well together parts that have been quenched
C)To apply a layer of material that combats wear
D) To apply material that is difficult to use
C)To apply a layer of material that combats wear
Machinery parts that are subjected to wear can have their service life prolonged by: A)Welding with Alloy electrodes B)Hard facing the where surface C)Repairing the parts often D) Using the equipment to sparingly
B)Hard facing the where surface
What is the major advantage of hard facing
A)Worn parts with high replacement cost can be reclaimed
B)Hard facing filler alloys are cheap and easy to apply
C)Any hard facing alloy can be used with any welding process
D) The very hard always can also withstand high impact loading
A)Worn parts with high replacement cost can be reclaimed
Which arc welding process is very popular for hard facing because of its lower equipment cost versatility and general ease of application A)GMAW B)SMAW C)GTAW D) FCAW
B)SMAW
Which method of hard facing process is the slowest A)SMAW B)FCAW C) GMAW D) GTAW
D) GTAW
What is a disadvantage of the FCAW surfacing process as compared to GMAW surfacing
A)It produces flag, which may have to be removed
B)Alloys cannot be added to the wires
C)The cored electrode can only be used on small radius
D) The equipment is much more expensive
A)It produces flag, which may have to be removed
What is the advantage of the MCAW surfacing processor compared to the FCAW surfacing process A)The deposition rates are similar B)Special equipment is required C)Alloys cannot be added to the wires D) it produces little to no slag
D) it produces little to no slag
Which arc welding surfacing method uses high current and high deposition rates, leaves no splatter an admit snow harmful ultraviolet radiation? A) SMAW B)OAW C)SAW D) FCAW
C)SAW
Which is true of the oxyfuel gas hard servicing process
A)You can service only large areas
B)The best metal does not have to be clean
C)It has a higher deposition rate then arc surfacing processes
D) It has a low base metal dilution
D) It has a low base metal dilution
Which statement describes thermal spray surfacing
A)The flame carburize is the service so that the rod can be melted onto it
B)The constricted arc is force between the electrode and the workpiece
C)The electrode is continuous and the arc is covered with a flux
D) It hits a metallic or nonmetallic material and propels it towards the object
D) It hits a metallic or nonmetallic material and propels it towards the object
A sliding scraping type of where that removes metal by gouging or grinding is called A)Erosion B)Abrasion C)Corrosion D) Impact
B)Abrasion
I gouging type of where that washes away or grooves out of the metal surface is called A)Corrosion B)Oxidation C)Erosion D) Abrasion
C)Erosion
Seizing or Galling type of where that rips and tears out portions of metal surface is called A)Abrasion B)Metal to metal C)Erosion D) Corrosion
B)Metal to metal
The type of where the pits perforate and eventually dissolves metal is called A)Thermal shock B)Abrasion C)Erosion D) Corrosion
D) Corrosion
A special form of corrosion that results in the crumbling or flaking off of a metal surface is called A)Erosion B)Oxidation C)Metal to metal D) Compression
B)Oxidation
A cracking splitting type of where caused by rapidly exposing metal parts to rapid heating and cooling cycles is called A)Thermal Shock B)Impact C)Abrasion D) Metal to metal
A)Thermal Shock
A squeezing type of where usually caused by the imposition of a heavy static load on the surface of a metal is called A)Abrasion B)Impact C)Compression D) Corrosion
C)Compression
What material is the most abrasion resistance of all hard facing materials A)Tungsten carbide B)Chromium carbide C) Austenitic manganese D) Austenitic Stainless steel
A)Tungsten carbide
These hard facing materials which are work hardenable are well-suited for impact loading A)Tungsten carbide B)Chromium carbide C) Austenitic manganese D) Martensitic stainless steel
B)Chromium carbide
For best results the deposits with these materials should be two or more layers thick A)Tungsten carbide B)Chromium carbide C) Martensitic stainless steel D) Heat treatable steels
C) Martensitic stainless steel
Which material results in a deposit that is hard if cooled quickly or soft and tough it’s cooled slowly A)Tungsten carbide B)Heat treatable steals C) Austenitic manganese D) Copper alloys
B)Heat treatable steals
Which hard facing material is used for sliding metal to metal contact and for corrosion resistance applications A) Chromium carbides B) Austenitic manganese C)Heat treatable steel D) Copper alloys
D) Copper alloys
What problem can result from the deep penetration characteristics of some arc welding processes
A)The hard facing metal may dilute with the base metal
B)Metal chunks may break away from the base metal
C)The parts may become hardened by heat treatment
D) With preheat underbead cracking always results
A)The hard facing metal may dilute with the base metal
Which term describes the breaking away of the wild metal from the base metal A)Dilution B)Distortion C)galling D) Spalling
D) Spalling
What is one method you could use to avoid stress failure when hard pacing apart hardened by heat treatment
A)Use no preheat
B)Quench in water right after welding
C)Avoid interruptions during welding
D) Quench in oil and cover with a blanket
C)Avoid interruptions during welding
