©
COPYRIGHT 2000 THE ESAB GROUP, INC. LESSON
VIII
8.9.2.9
Wear-O-Matic 40
No AWS Classification
DCEP (Electrode
Positive)
Open Arc-Hardsurfacing
Alloy
Severe Abrasion and Compression
Description:
Wear-O-Matic 40 - 7/64"
(2.8 mm) diameter wire
is a hardsurfacing alloy
with high chromium and carbon
content. It is designed
to provide outstanding resistance
to wear caused by abrasion
in combination with com- pression.
These wear-resistant properties are retained
at temperatures up to
1000°F (538°C). Deposits take a
high polish and do not
gall or seize when subjected to metal-to-metal
wear.
The unique wear-resistant
properties of Wear-O-Matic
40 allow a wide variety
of applications:
Crusher parts
Hammermill parts
Steel mill parts
Mill guides
Procedure:
Wear-O-Matic 40 - 7/64"
(2.8 mm) diameter wire should be
deposited with the open arc only, using direct current, reverse
polarity. The recommended amperage range is 175-300
amperes at 30-35 arc volts. A weaving bead of
1-1/2" (38 mm) in width is recommended. Deposit thickness
should be limited to two passes or 1/4" (6.4 mm). Typical
Mechanical Properties: Wear-O-Matic
40 open-arc wire is a high alloy material combining
chromium and carbon with other alloying elements
to provide extremely high abrasion resistance and
good compressive strength. The deposit is not heat treatable
and cannot be forged. Weld deposits cannot be
cut with oxy-acetylene torch or by air carbon-arc cutting.
Hardness of Deposited
Metal: Two
layer deposit on 1045 steel—weaving technique— 58
Rockwell C Abrasion
Resistance: Excellent Heat
Resistance: Excellent up to 1000°F (538°C) Impact
Resistance: Light Compressive
Strength: Good Machinability:
Non-machinable. Finish by grinding. Relief
Checking: A uniform pattern of check cracks appears
in the deposit as it cools, indicating the excel- lent
stress-relief characteristics of this alloy. This check crack
pattern is necessary to prevent distortion in large parts
when an alloy of this hardness and alloy content is applied.
Typical Undiluted
Weld Metal Analysis (%)
C
Mn
Si
Cr
Mo
4.00
1.50
1.50
27.00
1.00
8.9.2.8 Wear-O-Matic
15 No
AWS Classification DCEP
or DCEN (Electrode Positive or Negative) Open
Arc-Hardsurfacing Alloy Severe
Abrasion Resistance Description:
Wear-O-Matic 15 - 7/64" (2.8 mm) diameter
open arc wire is a hardsurfacing
alloy with outstanding resistance to
wear caused by severe abrasion. Wear-O-Matic
15 produces extremely high abrasion- resistant
qualities that make it an outstanding surface material
for pug mill knives and augers, dry cement pump
screws, conveyor screws, and asphalt mixer paddles
and shanks. Procedure:
Wear-O-Matic 15 - 7/64" (2.8 mm) diameter
wire should be deposited with
the open arc only, using direct current, straight
or reverse polarity. Recommended amperage range,
175-300 amperes at 30-35 arc volts. Weaving bead
of 1-1/2" (38 mm) in width is recommended in order
to develop maximum abrasion-resistant qualities in
the deposit. Deposit thickness should be limited to two
passes or 1/4" (6.4 mm). Typical
Mechanical Properties: The
deposit of Wear-O-Matic 15 open-arc wire attains maximum
hardness as deposited and is unaffected by heat
treatment. In most cases, stress relief check cracks appear
in the deposit but do not impair the abrasion resistance
or the ability of the deposit to take a high polish.
Weld deposits cannot be cut with oxy-acetylene torch
or by air carbon-arc cutting. Hardness
of Deposited Metal: Two
layer deposit on 1045 steel—weaving technique— 60
Rockwell C Abrasion Resistance:
Outstanding Impact Resistance:
Light Compressive Strength:
High Machinability:
Non-machinable. Finish by grinding. Typical
Undiluted Weld Metal Analysis (%) C
Mn
Si
Cr
Mo
4.00 0.30
0.60 5.50
5.00
