Submerged Arc Welding (SAW)

Question 1

SAW stands for?

Answer 1

Submerged arc welding sometimes called sub-arc

Question 2

Describe and explain the principles of operation of saw

Answer 2

submerged arc welding is an arc welding process in which metals are joined using an electric arc established between a continuously fed bare metal consumable electrode or electrodes and the work. Shielding is provided by a granular, fusible Flux material usually brought to the work area using flux feed system

Question 3

What positions can SAW be used in

Answer 3

Flat and horizontal

Question 4

name four types of materials that saw can be used on

Answer 4

carbon alloy steels stainless steels and Nickel alloys

Question 5

List the 7 basic equipment components required for saw

Answer 5

1 the weld power source provides welding current
2 the welding head assembly includes the wire feeder, torch assembly and travel carriage
3 the fixtures and positioners position the work pice for the welder
4 spooled filler wire provides filler metal for the weld
5 The flux provides shelving, shapes the beed and allows alloys to be added
6 The flux feed and recovery equipment conveys flux to the weld zone and collects unused flux
7 the work lead connection completes the welding current circuit to the work pice

Question 6

What are the advantages of using a screw type work clamp

Answer 6

It minimizes heat build up

Question 7

What types of output slope do saw power sources use

Answer 7

CC and CV

Question 8

what duty cycle rating is recommended for most saw power sources

Answer 8

100%

Question 9

Saw may be used in the semi-automatic operation modes

Answer 9

True

Question 10

what is the advantage of using an ac power source for saw

Answer 10

it minimizes are blow with multiple wire set ups

Question 11

what will usually result if the drive roll pressure is set to low

Answer 11

the wire electrode will slip and feed erratically

Question 12

how will the arc react if the flux layer is to shallow

Answer 12

the weld will be flashing and will likely result in prosperity

Question 13

which is helix

Answer 13

the space between two unrestrained loops of wire

Question 14

What types of drive roll systems are normally used with SAW

Answer 14

knurled or v groove

Question 15

What type of wire feed set up is used with cv power sources

Answer 15

constant speed

Question 16

List the 6 main SAW operating Variables and there effects

Answer 16

1 Amperage controls penetration and rate of deposit
2 voltage affects arc length
3 travel speed affects the penetration and the weld beed profile
4 Electrode diameter has a direct effect on the weld beed shape and depth
5 Electrode extension affects rate of metal deposition and affects flux layer depth
6 width and depth of flux layer has influence on arc actions bead appearance and weld metal soundness

Question 17

Interpret the AWS Classification for the F7AZ-ELI2K

Answer 17

1 designates as a flux
2 minimum tensile strength is megapascals x 10 000 psi ( 70 000 psi)
3 as- welded condition
4 no impact properties are specified 
5 electrode 
6 medium manganese content 
7 nominal carbon content (0.12%) 
8 made from fully killed steel

Question 18

Interpret the CSA Classification for the F49AZ-EMI4K

Answer 18

1 designates as a flux
2 minimum tensile strength is megapascals x 10 ( 490 MaP)
3 as- welded condition
4 no impact properties are specified 
5 electrode 
6 medium manganese content 
7 nominal carbon content (0.14%) 
8 made from fully killed steel

Question 19

Which type of Flux can be re-used

Answer 19

fused

Question 20

Which type of saw flux is generally used for the addition of alloying elements

Answer 20

Active flux