测量了激光对接焊后热轧钢板正背表面焊缝宽度，分析了激光焊的焊接速度对热轧钢板焊缝成形和质量的影响。
The width of laser welds on the top and bottom surfaces of hot rolled plates after laser welding was measured.
无背衬的单面焊缝可评定有背衬的双面焊缝；
Welds made from one side without backing qualify welds made from both sides and welds with backing;
无背衬的单面焊缝可评定有背衬的双面焊缝；
Welds made from one side without backing qualify welds made from both sides and welds with backing;
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