Porosity: Porosity zvinoreva kuti iyo cavity yakaumbwa kana gasi mune yakanyungudika padziva haipukunyuki pamberi peSimbi kusimbisa uye kunoramba kuri muWel. Its gas may be absorbed by the molten pool from the outside, or it may be generated by reaction in the welding metallurgy process.

Kudzivirira matanho:

a. Bvisa iyo yemafuta banga, ngura, mvura uye sundris kubva kune waya wire, kushanda groove uye nzvimbo yayo yepedyo.
b. Alkaline welding rods and fluxes shall be used and thoroughly dried.
c. DC reverse connection and short arc welding shall be adopted.
D.PREEHEAT usati wasvikira kuderedza kumhanya kwekutonhora.

Matanho ekudzivirira marara emarara:
a. Reduce the content of harmful elements such as sulfur and phosphorus, and weld with materials with low carbon content.
b. Zvimwe zvinhu zvezviyo zvinowedzerwa kuderedza kristasi cruntals uye rusununguko. Semuenzaniso, aluminium neimbi inogona kunatsa zviyo.
c. The weld with shallow penetration shall be used to improve the heat dissipation condition so that the low melting point material floats on the weld surface and does not exist in the weld.
d. Welding specifications shall be reasonably selected, and preheating and afterheating shall be adopted to reduce the cooling rate.
e. Adopt reasonable assembly sequence to reduce welding stress.

a. Teerera kune iyo inosimbisa mhedzisiro yezvinhu zvesimbi uye pesvedzero yavo pane dzinza matanda.
b. Reasonably preheat or use afterheat to control the cooling rate.
c. Kuderedza kusara kusimba kuti udzivise kushushikana kushushikana.
d. During tempering, avoid the sensitive temperature zone of reheat cracks or shorten the residence time in this temperature zone.

Matanho ekudzivirira kutonhora marara:
a. Yakadzika Hydrogen Type Alkaline Welding tsvimbo ichashandiswa, yakaoma yakaoma kwazvo, yakachengetwa pa100-150 ℃, uye inoshandiswa pakutora.
b. The preheating temperature shall be increased, the post heating measures shall be taken, and the interpass temperature shall not be less than the preheating temperature. The reasonable welding specification shall be selected to avoid brittle and hard structures in the weld.
c. Select reasonable welding sequence to reduce welding deformation and welding stress.
d. Muitire hydrogen kubviswa kupisa kurapwa munguva mushure mekutyaira