WELDTECH WT180MP, Руководство по эксплуатации

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Joint Preparations
In many cases, it will be possible to weld steel
sections without any special preparation. For
heavier sections and for repair work on castings,
etc., it will be necessary to cut or grind an angle
brittleness, generally cracks when attempts are
made to weld it. Trouble may also be experienced
when welding white-heart malleable, due to the
porosity caused by gas held in this type of iron.
Copper and Alloys
The most important factor is the high rate of heat
conductivity of copper, making pre-heating of
heavy sections necessary to give proper fusion of
weld and base metal.
Types of Electrodes
of groups depending on their applications.
There are a great number of electrodes used for
specialised industrial purposes which are not
of particular interest for everyday general work.
These include some low hydrogen types for high
tensile steel, cellulose types for welding large
diameter pipes, etc. The range of electrodes dealt
with in this publication will cover the vast majority
of applications likely to be encountered; are all
easy to use.
between the pieces being joined to ensure proper
penetration of the weld metal and to produce
sound joints. In general, surfaces being welded
should be clean and free of rust, scale, dirt, grease,
etc. Slag should be removed from oxy-cut surfaces.
Typical joint designs are shown in Figure 1-19.
MILD STEEL :
E6013
- This all-position electrode is used for welding
clean, new sheet metal. Its soft arc has minimal spatter,
moderate penetration and an easy-to-clean slag.
E7018
- A low-hydrogen, all-position electrode used when
quality is an issue or for hard-to-weld metals. It has the ca-
pability of producing more uniform weld metal, which has
better impact properties at low temperatures.
CAST IRON:
NiFe
- Suitable for joining cast irons
312 Weldall
- Allows welding of dissimilar steels for a high
strength, crack resistant weld
HF600 Hard Facing
- Designed to deposit long lasting,
wear resistant overlays on all ferrous metals where high
impact and abrasion resistance is required.
316L -
Low carbon & rutile coated for premium welding
quality of 300 series stainless steels.
STAINLESS STEEL:
Open Square Butt Joint
(Fig 1-19a)
Gap varies from1.6mm (1/16”)
to 4.8mm (3/16”) depending on plate thickness
Single Vee Butt Joint
(Fig 1-19b)
Not less than 45˚
Single Vee Butt Joint
(Fig 1-19c)
Not less than 70˚
1.6mm (1/16”) max.
1.6mm (1/16”)
Double Vee Butt Joint
(Fig 1-19d)
Not less than 70˚
1.6mm (1/16”) max. 1.6mm (1/16”)
Lap Joint (Fig 1-19e)
Fillet Joint (Fig 1-19f)
WT180MP Welding Machine
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