The carbon steel electrode (deposited metal tensile strength less than or equal to 500MPa namely 50kgf/mm2) applicable to carbon steel and low-strength low alloy steel welding. Low hydrogen, iron powder type electrode before Welding Electrodesmust be baked at 350 ° C above, as far as possible to do with the drying with the use of the principle of how much baking how much, otherwise it will produce welding defects (such as porosity, slag, cracks, deterioration of process performance, etc.). CelluloseTypes OfWelding Electrodesshould be strictly in accordance with the provisions of the Manual baking temperature baking, the temperature is too high will burn the cellulose to the drug skin, damage inherent in the electrode process performance. Using low hydrogen electrodes, the welder should be living in the upwind position, to enhance ventilation, to prevent the hazards of welding fumes on the body. Low hydrogen type electrode baking the number of times as much as possible not more than twice to prevent drug skin to become brittle and fall off.
AQSIQ organizes the production of 58 enterprises of Beijing, Tianjin, Hebei, Shanxi, Liaoning, Shanghai, Jiangsu, Zhejiang, Hubei, Hunan, Shandong, Henan and other 12 provinces, municipalities, 58 kinds of gas shielded welding wire and acidic carbon steel electrode products (not involved in the export product), product quality sample pass rate of 98.3%. The spot checks according to the recommended national standard GB/T8110-1995 gas shielded arc welding of carbon steel, low alloy steels GB/T5117-1995 "Carbon Steel Electrode" provisions of the Chemical composition of the gas shielded welding wire products deposited metal mechanical properties, ray testing, welding performance, Welding Wire external quality projects testing; deposited metal mechanical properties of the deposited metal chemical composition of the acidic carbon steel electrode products, ray testing, welding performance. T-joint fillet welds, the external electrode quality tested.
The spot checks found in the main quality problem is the failure of individual products, Chemical composition. Chemical composition determines the intrinsic quality of the wire, spot checks, the chemical composition of the carbon content of individual products do not meet the standard requirements.
Quality problems found in spot checks, the AQSIQ has instructed the quality and technical supervision departments and enterprises, national supervision and spot checks of products of inferior quality shall be in strict accordance with the provisions of the Product Quality Law and other relevant laws and regulations for processing, a deadline for rectification . At the same time, announced the checks in good quality product and its manufacturer, guide consumption.