WELDING NOTES
What is the definitions of weld preparations, How we classified the welding imperfections, Define the typical type of hot/cold cracks, How we classified the cracks, Which cause of burn through, What is the code of weld Preparation, What is the melting point of filler metal?, How many type joint and preparation degree? 1 (Butt joint), Edge joint, Cruciform joint
 |
| WELDING NOTES What is the definitions of weld preparations, How we classified the welding imperfections, Define the typical type of hot/cold cracks, How we classified the cracks, Which cause of burn through, What is the code of weld Preparation, What is the melting point of filler metal?, How many type joint and preparation degree? 1 (Butt joint), Edge joint, Cruciform joint |
What is that the definitions of weld preparations?
Preparing joint to permit access&fusion through the joint faces.
How we have a tendency to classified the fastening imperfections.
1,Cracks 2,Gas pores,Cavities,pipes 3,Solid inclusions four,Lack of fusion five,Surface and
Profile half dozen,Mechanical/Surface harm seven,Misalignment.
Define the everyday kind of hot/cold cracks?
1,H2 Cracks two,Solidification Cracks three,Lamellar Tears.
How we have a tendency to classified the cracks.
Cracks square measure classified as power tool imperfections as they're two dimensional i.e length&depth.
Which reason behind burn through?
fastening current > Root gap < Root face < Speed of travel.
What is that the code of weld Preparation?
BS nut 9692
What is that the temperature of filler metal?
The temperature of the filler metal higher than than 450C' however perpetually below than parent material melting temperature.
How several sort joint Associate in Nursingd preparation degree? one (Butt joint)
The edges of 2 components creating an angle to at least one another that's 135' to 180'.
2= Tee joints. the perimeters of 1 components and therefore the face of alternative half creating Associate in Nursing angle each other over 5' up to together with 90'.
3=Corner joint. A association between the perimeters of 2 components creating Associate in Nursing angle to at least one another over 30' butt but 135'.
Edge joint. A association between the perimeters of 2 components creating Associate in Nursing angle to at least one another of o' to 30'.
Cruciform joint. A association within which 2 flat plates or 2 bars square measure welded to at least one another flat plate at right angles
Lap joint. A association between 2 overlapping components creating Associate in Nursing angle to at least one another of 0' to 5'.
What is that the defination of enclosed angle?
The angle between the planes of the fusion faces of half to be welded case of single V,U and
double V,U this angle doubly the bevel angle.
How we have a tendency to outline the fillet weld dimensions?
1= Actual throat thickness 2= style throat thickness 3= leg length
How calculate the throat thickness?
leg lengthx0.707
How calculate the leg length?
Throat thickness x1.41
How many sorts of fillet weld?
MITRE fillet weld, convex fillet weld, Concave fillet weld, Asymmetrical fillet weld, and deep penetration f/w
What is that the reason of action cracks?
Solidification cracks occur once the weld metal has high carbon or impurity(Sulphur)elements.
The depth-to-width magnitude relation of the activity weld bead is large(deep and narrow)
Disruption of the warmth flow condition happens,eg stop/start condition. (Hot cracks)
What is that the defination of action cracks?
Solidification cracks occur once the weld metal (along the centreline of the weld)
 |
| WELDING NOTES 2 What is the definitions of weld preparations, How we classified the welding imperfections, Define the typical type of hot/cold cracks, How we classified the cracks, Which cause of burn through, What is the code of weld Preparation, What is the melting point of filler metal?, How many type joint and preparation degree? 1 (Butt joint), Edge joint, Cruciform joint |
What is that the defination of H evoked cracks?
Hydrogen evoked cracking happens primarily within the grain-coarsened region of the haz ,and is additionally familiar is cold,delayed or underbead/toe cracking.
What is that the reason of GAS Pore occurs?
Damp fluxes/corroded electrode(MMA)grease/hydrocarbon/water contamination of the surface.
Air denial in gas shield(MIG/MAG/TIG)to high arc voltage and arc length/Too high a shielding gas flow rate(MIG/MAG/TIG)
What is that the code standards use for crosswise tensile take a look ats?
EN 895 is applicable for crosswise tensile test.
For that purpose we have a tendency to apply crosswise tensile take a look ats?
Welding procedure qualifaction take a look at perpetually needed crosswise tensile test for the strength of joint.
How we have a tendency to live the energy prices of chapy V take a look at?
We use Joules for live the energy value of charpy V test.
How several approach we have a tendency to used for Hardness testing?
1=Vickers hardness test(uses a square- base diamond pyramid indenter.
2=Rockwell hardness test(uses a diamond cone indenter or steel ball.
3= Brinell hardness take a look at (uses a steel ball indenter)
How many sorts of Bend testing?
1=Face bend 2= Root bend 3= facet bend 4= Longitudinal bend
What is that the typical bend take a look at angle?
The typicle bend take a look at angle is 120-180'
0 Comments