Question

Q1: What is the heat-affected zone (HAZ) in a fusion weld? What are some of the design guidelines for weldments that are fabricated by arc welding? What are several modern-day variations of forge welding? Discuss the reasons why most welding operations are inherently dangerous.

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Answer 1

The heat - affected zone in a fusion weld is a Sawiona non-mebed area of metal that has undergone changes in maledical properties as a result of high temperature • it is area blw the weld or cut and the base Parent metell. Thys zene se produs in its fusion zone. oy. The guidelines for Weldments by are Welding include: it crood lict-up of ports to be welded is important to maintain dimensional control and minimize distertion Machining is gequised for satisfactory Pit-up. 27 The design of the assembly must provide access room to allow the welding dun to reach the welding area. 3) Design of the asse seonbly should allow flat webing to be performed, as opposed to horizoniell, vertical, or ovesheeld are welding Position on these are several modern day variations of Porge welding case: - in cold welding 17 roll welding uit hout pressure welding

most welding inherently Operation cese dengerous because of the high eno eresoj Involved. - Most welting operations de coloried out at chigh temperature that can cause serious burns on skin and filesh. m gas welding, the fuels de a Ase hazard. In coc welding and resistenie welding high electrical energy can cause shocks that are fatal to the worker. electrics are emits intense ultraviolet Nadiation that cause blinding.