Te Whakatikatika Atu:

a. Tangohia te hinu hinu, te waikura, te wai me te ra i te taura tohu, te mahi i te whatu me ona papa e tata ana.
pē. Alkaline welding rods and fluxes shall be used and thoroughly dried.
c. DC reverse connection and short arc welding shall be adopted.

E. Ka whakahaerehia te raima me nga whakaritenga kaha.

a. Reduce the content of harmful elements such as sulfur and phosphorus, and weld with materials with low carbon content.
pē. Certain alloy elements are added to reduce columnar crystals and segregation. For example, aluminum and iron can refine grains.
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. Ko nga tohu tohu ka tohua, ka pai ake te whakarite me te whakatipu i te reiti o te makariri.
E. Whakapaihia te raupapa Huihuinga ki te whakaiti i te ahotea.

a. Pay attention to the strengthening effect of metallurgical elements and their influence on reheat cracks.
pē. He pai ake te whakamahi i muri ranei i muri mai ki te whakahaere i te reiti makariri.
c. Reduce residual stress to avoid stress concentration.
d. I te wa e mataku ana, karohia te rohe pāmahana whai kiko o te kapiti reanga, hei whakapoto poto ranei i te waa noho i tenei rohe pāmahana.

a. Low hydrogen type alkaline welding rod shall be used, dried strictly, stored at 100-150 ℃, and used when taking.
pē. 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. Conduct hydrogen elimination heat treatment in time after welding