Module 19 hard facing Flashcards
What does the term hard facing mean?
A) the application of an alloy that assists corrosion
B) to weld together part 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 where can have their service life prolonged by
A) welding with alloy electrodes
B) hard facing the ware surface
C) repairing the parts often
D) using the equipment sparingly
B) hard facing the ware surface
What is a 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 alloys 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 low 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 slag, which may have to be removed
B) cannot be added to the wires
C) the cord electrode can only be used on a small radius
D) the equipment is much more expensive
A) it produces slag, which may have to be removed
What is the advantage of the MCA W surfacing process compared to the FCAW surfacing process?
A) the deposition rates are similar
B) special equipment is required
C) Al 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 currents and high deposition rates leaves no spatter and emits no harmful ultraviolet radiation
A) SMAW
B) OAW
C) SAW
D) FCAW
C) SAW
Which is true of the oxy fuel, gas hard surfacing process
A) you can surface only large areas
B) the base metal does not have to be clean
C) it has a higher deposition rate than arc surfacing processes
D) it has low base metal dilution
D) it has low base metal dilution
Which statement describes thermal spray surfacing
A) the flame rises the surface so that the rod can be melted onto it
B) the constructed arc is forced between the electrode and the workpiece
C) the electrode is continuous, and the arc is covered with flux
D) it heats a metallic or non-metallic material and propels it towards the object
D) it heats a metallic or non-metallic 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
A gouging type of wear that washes away or grooves out the metal surface is called
A) corrosion
B) oxidation
C) erosion
D) abrasion
C) erosion
A seizing or galling type of wear that rips and tears out portions of a metal surface is called
A) abrasion
B) metal metal
C) erosion
D) compression
B) metal metal
The type of wear that pits perforate and eventually dissolves metal is called
Corrosion
A special form of corrosion that results in the crumbling or flaking off of a metal surface is called
Oxidation
