Applications
Hard surfacing of wheels, shafts and gears.
Characteristics
VHF-400B is a titania type electrode which has good slag removal and bead appearance. It is also applicable to abrasion accompanied by moderate impact. Machining on the weld metal is applicable, and the hardness can be increased by quenching after machining.
Notes on usage
1.) Preheating is unnecessary in general.
However, large size casting steels and forgings, low alloy steels or high carbon steels should be preheated at 150ºC and over.
2.) Dry the electrodes at 70~100ºC for 30~60 minutes before use.
DESCRIPTION & APPLICATIONS:
VHF-350B is a general purpose wear-resisting alloy steel electrode. The air- hardening chromium molybdenum (Cr-Mo) alloy steel deposit has high strength and toughness combined with good abrasion resistance. The general characteristics of VHF-350B are:
- The electrode is smooth running and exhibits excellent metal transfer and slag control.
- An electrode suitable for rebuilding of badly worn mild and alloy steel components, and buffer layers prior to deposition of harder deposits.
- Refined and balanced weld metal chemistry giving reliable hardness and crack free deposits
- Deposit hardness: 300 – 350 HV
- A.C./D.C. supply suitable; can be used on low O.C.V. machines (minimum O.C.V. 50)
- Deposit is machinable
For hardfacing, rebuilding or buffering with VHF-350B, the removal of millscale, heavy rust, fatigued or deformed metal, is recommended. Preheat heavy sections or alloy steels in accordance with normal welding practice. This general purpose, metal-enriched coated electrode is suitable for steel companies like:
- Tractor idler wheels, rollers and tracks links
- Surfacing gears, mine rails, shovel pads, pins and clutches
- Rebuilding of shafts, wheel treads and agricultural implements
TYPICAL ANALYSIS OF ALL WELD DEPOSIT:
C |
Si |
Mn |
Cr |
Mo |
Others |
|
|
|
0.17 |
0.38 |
0.56 |
2.90 |
- |
- |
|
|
|
HARDNESS 43-46(420-460 Hv)
RECCOMENDED CURRENTS: Ampere (AC/DC+)
Size |
Dia |
3.2 |
4.0 |
5.0 |
(mm) |
Length |
350 |
350 |
350 |
Current Range |
90-130 |
120-180 |
170-230 |
WELDING POSITIONS:
FLAT, FILLET, VERTICAL UP, HORIZONTAL, OVERHEAD
EXPORT Packing: 5Kg plastic container, then 4 5kg containers in master carton box
LOCAL Packing: 5Kg paper box in shrink wrapped plastic
Other special packaging can be accommodated as per request. |
