TSM 233 Final Exam Review Questions
Review Tests 1 and 2.
1) Describe the basic criteria that provide weld strength.
Weld qualityusually the problem for novices, but not for 90% of others
Weld designplaced into different categories
Special Metals Fabrication and
The purpose of this unit of instruction is to provide
an overview of the following topics which we do not
have an opportunity to do during the laboratory
An Introduction to Ferrous
Cementite - iron carbide, Fe3C
Ferrite - pure iron
Pearlite - grain structure combination of ferrite and cementite
in a layer formation.
Austenite - heated to the transformation temperatur
a. Gas metal arc welding
Easy to use, high productivity, clean welds
Equipment is specialized along with setups for different applications, few
metals are able to be welded
b. Flux core arc welding
Easy to use, fast and efficie
Which electrode has a deeper
penetration: E6011 or E7014?
-Obtain 2 pieces of 3 x 1 x 1/8 steel metal
-Using SMAW on AC at 80 amps, and an E6011 electrode, butt weld
the 2 pieces of metal down the 1
Heat Treating Processes
What is Heat-treating?
Changing the physical and mechanical properties of
metal by using heating and cooling processes.
Changes the nature of the grain structure of the
Almost all metals can be heat treated
What is soldering?
The process of bonding of metals
together using a metal alloy (solder) that
melts below 840 degrees F and the
melting point of the base metals.
TSM 233 Metallurgy and Welding Processes
What are some reasons for
Brazing and Braze Welding
What is brazing?
Bond materials melts above 840 degrees F.
As in soldering the base metals do not melt.
Uses capillary action,
Often called hard soldering.
Silver soldering is a form of brazing.
TSM 233 Metallurg
Plasma Arc Cutting
The Plasma Arc Process
Plasma Arc Cutting uses the
principle of passing an
electric arc through a
quantity of gas traveling
through a restricted outlet.
The gas is heated by the arc
to such a high temperature
that the gas
Cold Metalworking Processes
Those metalworking processes where the base
metals are not heated nor allowed to become
heated above the ambient temperature.
Metals expand when heated.
Upon cooling, the metals contract (shrink).
Distortion is when a metal does not return to its
original shape and/or position.
Generally, you can not stop distortion, you can only
Metallurgy: Identifying Metals
Materials Properties for Metals
Four categories for classifying the properties of
TSM 233 M
TSM 233 Test #2 Review Questions
Gas Metal Arc Welding
1) What are the benefits/disadvantages of GMAW? FCAW? MCAW?
High productivity, little waste
Most efficient, fast
Relatively easy to use.
Clean welds, little or no slag.
Equipment is specialized.
A look at traditional Eastern and
Western methods of heat treating
Structures of Steel
Ferrite (), is the crystal arrangement for pure iron. This form exists as part of the structure