(1) welding and cutting operations, the operating environment l Om explosive within the scope of a 380. Clean up items, the trench should be noted that operating environment, sewer and whether flammable liquids and combustible gases, and the possibility of leakage into the trench and the sewer combustible explosive material, so as welding slag, the metal of Mars caused disasters. (2) welding and cutting height, the throw rod against the first, the bottom of the Stainless Steel Electrode and cutting operations should be isolated, work is completed, careful examination should be done, sure no fire hazards before leaving the scene. (3) should be used to comply with relevant standards, procedures required of cylinders, cylinder storage, transportation, use and other sectors should strictly abide by safety procedures. (4) of the combustible gas and combustion gas transmission pipelines should be required to install, use and management, operators and inspectors should be specialized security training. (5) welding fuel containers and pipes should be determined in light of the actual welding methods. Implementation of the replacement method, the replacement should be thorough, work should be strictly controlled with combustible substances do not affect the implementation of replacement with a pressure law, shall be required to maintain a certain voltage. Work should be strictly controlled its oxygen content. To enhance detection, attention to monitoring, to have security measures in the organization. Summary: As an industrial technology, welding metal appeared to meet the new technical means of artistic development needs. On the other hand, under the action of the metal in the welding heat generated by the change also to meet the unique beauty of the metal art on the new language of artistic expression needs. In today's metal art, the Welding Electrodes can and is being used as a unique artistic expression to focus on language performance. In this paper, the emergence and use of this technology were analyzed.
1, chromium stainless steel with a certain degree of corrosion (oxidizing acids, organic acids, cavitation), heat and wear resistance. Typically used for power plants, chemical, oil and other equipment and materials. Chromium Stainless Steel Electrode is poor, should pay attention to welding, heat treatment conditions and the selection of appropriate welding rod.
2, chromium stainless steel after welding, hardening of 13 large, easy to crack. If using the same type of chromium stainless steel electrode (G202, G207) welding must be carried out more than 300 â„ƒ 700 â„ƒ preheating and post-weld around the slow cooling process. If the weldment can be post weld heat treatment, should be used chrome-nickel stainless steel electrode (A107, A207).
3, 17 chromium stainless steel to improve corrosion resistance and welding to increase the amount of stability and appropriate elements Ti, Nb, Mo, etc., welding of stainless steel better than the chrome 13. Using the same type of chromium stainless steel electrode (G302, G307), should be more than 200 â„ƒ 800 â„ƒ preheating and post-weld tempering treatment around. If the weldment can be heat treated, chrome-nickel stainless steel welding rod should be used (A107, A207).
4, Cr-Ni stainless steel electrode has good corrosion resistance and oxidation resistance, widely used in chemical, fertilizer, petroleum, medical equipment manufacturing.
5, chrome-nickel stainless steel welding, carbide precipitation by repeated heating and reduce corrosion resistance and mechanical properties.
6, chrome-nickel stainless steel skin with titanium calcium type drugs and low-hydrogen type. Titanium calcium type can be used for AC and DC, but AC Welding Electrode and easy to redness, so as far as possible dc power supply. Diameter of 4.0 and below can be used for all position welding pieces, 5.0 and above for flat butt and fillet weld.
7, the electrode should be used to keep dry, titanium calcium type shall be 150 â„ƒ drying 1 hour, low-hydrogen should be dried by 200-250 â„ƒ for 1 hour (can not be repeated drying, easy to crack and peel off the skin or drugs) to prevent the electrode drug skin oil and other sticky dirt, so as not to increase the carbon content of the weld and the resulting impact on the quality of weldments.
8, in order to prevent corrosion between the eyes resulting from heating, welding current is not too large, less than about 20% of carbon steel electrode, the arc should not be too long, rapid cooling between layers in order to narrow weld appropriate.