FORGE WELDING

WELCOME TO OUR PRESENTATION

FORGE WELDING

PRESENTATION ON

RAJSHAHI UNIVERSITY OF ENGINEERING

AND TECHNOLOGY

# FORGE WELDING# PRINCIPLES#CLASSIFICATION# PROCESS PARAMETERS # TEMPERATURE# TOOLS NEEDED# FORGEABLE METALS# COMMON HAND TOOLS# ADVANTAGE AND DISADVANTAGE# APPLICATION

CONTENTS

FORGE WELDINGForge welding is a solid-state welding

process that joins two pieces of metal by heating them to a high temperature and

then hammering them together.

PRINCIPLESSTEP 1: Metals are heated to the plastic condition (above 1000 degree Celsius) in a furnace.

STEP 2: Heated metals are brought to the anvil from heat source and superimposed them.

Schematic representation ofFORGE welding using Hammer

CLASSIFICATION# HAMMER WELDINGHammering is done by heating the metal to the

proper temperature, coating with flux, overlapping the weld surfaces, and then striking the joint repeatedly with hammer.

# ROLL WELDINGHere the heated metals are overlapped and passed

through rollers.

# DIE WELDINGHere the pieces of metal are heated and then forced

into a die.

Process parameters

• Forge-welding temperature• Amount of deformation • Forging speed

TEMPERATURE

*Typically 50 to 90 percent of the melting temperature.*Soft low carbon steel = 1250 to 1300 degree Celsius*High carbon and alloy steel = 1100 to 1140 degree Celsius*Wrought iron = little below 1290 degree Celsius

TOOLS NEEDED# Furnace

# Anvil

# Standard cross peen hammer# Flux (Borax / Silica sand)

FORGEABLE METALS# Aluminium alloys# Magnesium alloys# Copper alloys# Carbon and low alloy steels# Martensitic stainless steel# Austenitic stainless steel# Nickel alloys# Titanium alloys# Tungsten alloys

COMMON HAND TOOLS

# Hammers# Black-smith’s gauge# Hot chisel# Brass

ADVANTAGES

# Good quality welds obtained# Parts of intricate shape welded# No filler material required# Required less matching after welding# Welded joints have low initial cost# Welded joints easily repaired# Noiseless process# High strength welded joints

DISADVANTAGES# Low carbon steel is welded# High level of the operator skill is required# Slow welding process# Weld is contaminated by the coke used in heating furnace# Welded joints can not used for collision and vibration# Can not be assembled and reassembled

APPLICATION

# Aerospace industry# Production of crank shaft# Shipbuilding, cycle industries# Production of pattern-welded blades# Manufacture of shotgun barrels# Small tools like railroad equipments, automobile and trucks, agricultural machinery

THANKS TO ALL

PRESENTED BY:

145006 REFATI ZANNAT ANANNA145016 MD. MUZADDID ALAM145025 SOUVIK ROY 145034 MD.TASFIQUR RAHMAN 145044 KAZI AZHARUL ISLAM SAMIN145053 SHARMIN AKTER URMEE135030 A.S.M WAHID MURAD