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OM-225 426 Page 10

SECTION 5 

 

SELECTING AND PREPARING A TUNGSTEN

FOR DC OR AC WELDING

gtaw_Phase_2011

06

!

 Whenever possible and practical, use DC weld output instead of AC weld output.

5-1. Selecting Tungsten Electrode (

Wear Clean Gloves To Prevent Contamination Of Tungsten

)

Not all tungsten electrode manufacturers use the same colors to identify tungsten type. Contact the tungsten electrode manufacturer or reference

the product packaging to identify the tungsten you are using.

Amperage Range - Gas Type

 - Polarity

Electrode Diameter

(DCEN) 

 Argon

Direct Current Electrode Negative

(For Use With Mild Or Stainless Steel)

AC 

 Argon

Balance Control @ 65%  Electrode Negative

(For Use With Aluminum)

2% Ceria, 1.5% Lanthanum, Or 2% Thorium Alloy Tungstens

.040” (1 mm)

25-85

20-80

1/16” (1.6 mm)

50-160

50-150

3/32” (2.4 mm)

130-250

135-235

1/8” (3.2 mm)

250-400

225-360

Pure Tungsten

.040” (1 mm)

Pure Tungsten Not Recommended

For DCEN 

 Argon

10-60

1/16” (1.6 mm)

50-100

3/32” (2.4 mm)

100-160

1/8” (3.2 mm)

150-210

Typical argon shielding gas flow rates are 11 to 35 cfh (cubic feet per hour).

Figures listed are a guide and are a composite of recommendations from American Welding Society (AWS) and electrode manufacturers.

5-2. Preparing Tungsten Electrode For Welding With Phase Control Machines

!

Grinding the tungsten electrode produces dust and flying sparks which can  cause injury and start fires. Use

local exhaust (forced ventilation) at the grinder or wear an approved respirator.  Read MSDS for safety infor-

mation. Consider using tungsten containing ceria,  lanthana, or yttria  instead of thoria. Grinding dust from

thoriated electrodes contains low-level radioactive material.  Properly dispose of grinder dust in an environ-

mentally safe way. Wear  proper face, hand,  and body protection. Keep flammables away.

A. Preparing Tungsten For DC Electrode Negative (DCEN) Welding

Ideal Tungsten Preparation 

 Stable Arc

2-1/2 Times

Electrode Diameter

1

Grinding Wheel

Grind end of tungsten on fine grit, hard

abrasive wheel before welding. Do not use

wheel for other jobs or tungsten can become

contaminated causing lower weld quality.
2

Tungsten Electrode

A 2% ceriated tungsten is recommended.
3

Flat

Diameter of this flat determines amperage

capacity.
4

Straight Ground

Grind lengthwise, 

not radial

.

1

3

4

1

Tungsten Electrode

A pure tungsten is recommended..
2

Balled End

Ball end of tungsten by applying AC amper-

age recommended for a given electrode

diameter (see Section 5-1). Let ball on end of

the tungsten take its own shape.

B. Preparing Tungsten For AC Welding

 1-1/2 Times

2

Electrode Diameter

Causes Wandering Arc

2

1

Wrong Tungsten Preparation 

Radial Grinding

Содержание CS310A

Страница 1: ...nd Held Water Cooled TIG GTAW Torches Torches manuelles TIG refroidies par eau Antorchas manuales enfriadas por agua para TIG GTAW File TIG GTAW Owner s Manual Manual del Operador Manuel de L utilisat...

Страница 2: ...Style Connector Assembly 4 3 3 Connecting Torch 5 SECTION 4 MAINTENANCE TROUBLESHOOTING 8 4 1 Routine Maintenance 8 4 2 Troubleshooting 8 SECTION 5 SELECTING AND PREPARING A TUNGSTEN FOR DC OR AC WEL...

Страница 3: ...parts Keep all covers and handle securely in place ELECTRIC SHOCK can kill Arc rays from the welding process produce intense visible and invisible ultraviolet and infrared rays that can burn eyes and...

Страница 4: ...4W 5NS phone 800 463 6727 website www csa international org Safe Practice For Occupational And Educational Eye And Face Protec tion ANSI Standard Z87 1 from American National Standards Institute 25 We...

Страница 5: ...Thru 4 0 mm Cable Options 12 5 ft 3 8 m Or 25 ft 7 6 m Three Piece Tri Flex 12 5 ft 3 8 m Or 25 ft 7 6 m Three Piece Vinyl Dimensions Length 7 in 178 mm Handle Diameter 15 16 in 24 mm Weight 4 45 oz...

Страница 6: ...ch Body Keep connections tight Replace cup heat shield and backcap as needed 14 Tungsten Electrode See Sec tion 5 Installing Tungsten To adjust tungsten position loosen backcap 1 2 3 4 5 6 7 8 9 10 11...

Страница 7: ...r 7 Coolant Hose Customer Supplied Obtain correct length with 5 8 18 left hand fittings 8 Coolant Out Of Torch Power Cable Red Connect coolant out of torch power cable to power cable adapter and conne...

Страница 8: ...tem 5 Torch 6 Coolant Into Torch Hose Blue 7 Torch Gas Hose 8 Coolant Out Of Torch Power Cable Red 9 International Style Adapter Connect coolant out of torch power cable to power cable adapter and con...

Страница 9: ...lowmeter 4 Power Source 5 Coolant System 6 Torch 7 Coolant Into Torch Hose Blue 8 Coolant Out Of Torch Power Cable Red Connect torch coolant out of torch pow er cable to power cable adapter and connec...

Страница 10: ...complete see Section 3 3 Check and be sure shielding gas is present Lack of high frequency difficulty in es tablishing arc Select proper size and type tungsten Properly prepare tungsten according to S...

Страница 11: ...gas flow rate Check manufacture s recommendations Increase postflow time Check torch cup size Match cup size to joint being welded Erratic arc When using DC check polarity and or polarity of welding c...

Страница 12: ...ectrode For Welding With Phase Control Machines Grinding the tungsten electrode produces dust and flying sparks which can cause injury and start fires Use local exhaust forced ventilation at the grind...

Страница 13: ...ep flam mables away 1 Workpiece Make sure workpiece is clean before welding 2 Work Clamp Place as close to the weld as possible 3 Torch 4 Filler Rod If Applicable 5 Gas Cup 6 Tungsten Electrode Select...

Страница 14: ...ch to front of pool Repeat process 75 75 Welding direction Form pool Tilt torch Add filler metal Move torch to front of pool Repeat process Remove rod Welding direction 15 6 3 Positioning Torch Tungst...

Страница 15: ...ENGLISH OM 225 426 Page 13 Notes...

Страница 16: ...OM 225 426 Page 14 SECTION 7 PARTS LIST WC0179 A 2 3 1 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Figure 7 1 Complete Torch Assembly...

Страница 17: ...na GL No 8 1 2 in 1 6 45V41 Gas Lens 0 020 in 0 5 mm 1 6 45V42 Gas Lens 0 040 in 1 0 mm 1 6 45V43 Gas Lens 1 16 in 1 6 mm 1 6 45V44 Gas Lens 3 32 in 2 4 mm 1 6 45V45 Gas Lens 1 8 in 3 2 mm 1 7 796F74...

Страница 18: ...0 CS310 12G Hose Gas 12 5 ft 3 8 mm Braided 1 20 CS310 25G Hose Gas 25 ft 7 6 mm Braided 1 21 CS310 12PC Cable Power 12 5 ft 3 8 mm Braided 1 21 CS310 25PC Cable Power 25 ft 7 6 mm Braided 1 22 WC 3 1...

Страница 19: ...ENGLISH Notes...

Страница 20: ...ord File a claim for loss or damage during shipment For assistance in filing or settling claims contact your distributor and or equipment manufacturer s Transportation Department Contact your Distribu...

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