welding backing

This welding backing is specially designed for hand holes and manholes welding.

本衬垫适用于入孔,出孔的焊接使用.

The results show that welding with backing has lower dilution ratio of matrix than without backing.

实验结果显示,在稀释率方面,有水冷却对母材的稀释率较无水冷却时低.

The methods that can be used are: improve the cope hole; deal with the backing strip used for beam flange; strict the requirements for welding; reduce welding defects; remove the cracked parts; partial substitution of components.

采用的方法有：改进焊接工艺孔、对梁翼缘焊接垫板进行处理、严格焊接工艺要求，减少焊接缺陷、清除含裂纹部分、构件部分替换。

In this weldability test, the weld defect is eliminated, and the welding quality and efficiency are improved by adjusting welding parameter, optimizing the groove size and enhancing the fabricating precision of the backing and the inner clapboard.

通过焊接熔透性工艺试验、调控焊接工艺参数、优选装配坡口尺寸、提高衬条及隔板加工精度，保证了电渣焊质量和焊接效率的提高。

Cause Study of Porosities Formation in Semiautomatic CO_2 Arc Welding by One Side with Ceramic Backing Strip PROTECTION OF MARINE SHIPS: STATE OF THE ART IN CHINA

船舶焊接CO2气体保护单面焊气孔成因探讨