Hello, you either have problems or questions should we not help ?
(028)38150735
(028)38150735
 |
(028)38150735 |  |
FAQsWe help you not? Please send questions directly to us for more advice!
Customer (Date post:18/03/2014)
What is non-submergence? Causes and remedies?
 Click view answer
Answer by:Non-submerged welding is a serious defect in welded connection that may cause cracks. Non-submerged welding occurs in an angle of a weld, a welding edge or in middle of weld layers. Welding structure is mostly destroyed by non-submerged welding.
Causes and remedies:
Customer (Date post:17/03/2014)
What is slag mixture? Cause and remedies?
Click view answer
Answer by:Slag mixture is a defect, which is easy to occur in welds, weld slag and non-metallic impurities. It may appear on surface of welds or at root of welds… Any weld with slag will influence significantly on impact strength and flexibility of weld metal and decrease working capacity of welded connection under dynamic load.
Cause and Remedies:
Customer (Date post:17/03/2014)
What is blowhole? Cause and remedies?
Click view answer
Answer by:Blowhole is a phenomenon in which the air in weld metal cannot release when such weld metal becomes solid. Blowhole may appear inside or on surface of a weld, or focus or disperse inside a weld. The existence of blow hole in a weld diminishes working section, load bearing strength and tightness of welded connection.
Cause and remedies:
Customer (Date post:17/03/2014)
What is a crack? How temperature at which the crack occurs? How such crack is discovered?
Click view answer
Answer by:A crack is one of most serious defects of welded connection. It may occur on surface or inside a weld as well as in thermal influence area. The crack may arise at different temperatures: - Hot crack: arising from crystallization of welded connection when temperature is relatively high (over 1,000oC). - Cold crack: arising after completion of welding process and at below 1,000oC. Cold crack may appear after several hours or days. Cracks have different sizes, including microcrack or rough crack. Rough cracks destroy structure after working. Microcracks gradually extend to form rough cracks during working of structure.
Cracks can be discovered visually or by a magnifier for rough cracks on surface of welded connection. For microcracks inside welds, they can be discovered only when such testing methods as ultrasound, magnetic test, radiography,… Customer (Date post:17/03/2014)
How are deffects of weld?
Click view answer
Answer by:Errors of form, size and metal distribution of welding structure in comparison with design standards and technical requirements that reduce strength and working capacity of such structure are called welding defects. |
| Follow us : |     |
 |
TAN NAM DO DEVELOPMENT JOINT STOCK COMPANY
|
 |
Tiếng Việt
_fm_vaf_2.png "VAF")
_fm_tanador_1.png "tanador")
_fm_norton_1.png "norton")
_fm_nahaviwel_1.png "NAHAVIWEL")
_fm_maktec_1.png "maktec")
_fm_makita_1.png "makita")
_fm_jasic_1.png "jasic")
_fm_damahad_1.png "damahad")
_fm_crown_1.png "crown")
_fm_crepow_1.png "creow")
_fm_banner_CHOSUN_2.jpg "chosun")
_fm_bosch_1.png "bosch")
