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What is the purpose of applying (PWHT) Post Weld Heat Treatment on the welding?

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تم إضافة السؤال من قبل Hitham Alrashed , Quality control supervisor , CB&I Company
تاريخ النشر: 2016/07/20
JOSE VISTA
من قبل JOSE VISTA , TEAM LEADER , AL TADREA former SADEN AL ARABA Group Co.

To reduce the over heating of metal

Cristian Naum
من قبل Cristian Naum , Welding Supervisor , ALTRAD ADYARD LLC. ABU DHABI

  • To reducing the stress in the material  

Manfred Friedrich Brost
من قبل Manfred Friedrich Brost , Managing Director Waste Management , M.F.Welding Technik

According to DIN EN, heat treatment is a process or a combination of a plurality of processes for the treatment of a metallic workpiece, which is thereby heated and cooled again in a certain course in order to change material properties. In so doing, ambient agents may include changes in composition, e.g. The carbon or nitrogen content, or the crystal lattice

Alexander Acheampong Obeng
من قبل Alexander Acheampong Obeng , Machine operator , Nestle Ghana

Is to reduce residual stresses as a method of harddness control or even to enhance material strength.

Hitham Alrashed
من قبل Hitham Alrashed , Quality control supervisor , CB&I Company

Is a method for reducing and redistributing the residual stresses in the material that have been introduced by welding

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