nickel alloy welding wire

( 1 ) Nickel and nickel alloy electrode selection principle of nickel and nickel alloy electrode mainly based on the base material being welded alloy grades , chemical composition and use of environmental and other conditions used . Deposited metal electrode , the main chemical ingredient should be the main component of the base metal to be close in order to ensure the performance of welded joints and base metal considerably . However, considering the alloy in the arc welding losses, welding should also contain other Cast Iron Welding Electrode elements , in order to improve performance or seam welding performance.If you use the same ingredients electrode design requirements or did not reach a similar alloy composition suitable electrode , then the recommended use of high-performance one level electrode, in order to ensure that the weld performance is not less than the base metal .( 2 ) Nickel and nickel alloy electrode precautions for use① base metal preparation: before welding the base metal surface should be carefully cleared of oil , paint , dust and other dirt .② In order to prevent the holes, using a short -arc welding.③ The small welding current, welding without preheating , interpass temperature kept low (<150 ℃), in order to avoid overheating of the base material .④ welding rod swings to small, stay a little longer bead on both sides , in order to facilitate the pores and slag floats .Note ⑤ crater fill the crater to avoid crater cracks .⑥ nickel and nickel alloy microstructure of austenite , has a strong tendency to hot cracking in the weld fillet weld , the weld was required convex , so you can better prevent heat cracks . var addthis_config = {"data_track_addressbar":true};

Apart from iron-nickel alloy Invar , Kovar and permalloy , but also include the following alloys : (1) 68Fe +27 Ni +5 Mo and 53Fe +42 Ni +5 Mo, has a high thermal expansion coefficient , can be used bimetal thermostat , heat exchanger , and a variety of temperature adjusting means . (2) 46Ni +54 Fe, called on Low Alloy Steel Electrodes behalf of platinum , platinum same coefficient of expansion , has good corrosion resistance, in some cases can be used instead of platinum . (3) 42Ni +58 Fe, vacuum sealing can be used instead of platinum wire. (4) 36NJ +12 Cr +52 Fe, is a constant elastic alloys , thermo-elastic coefficient is equal to zero , commonly used for hair clips , watches balance wheel and precision instrument parts . Melting ingots , pressure processing . var addthis_config = {"data_track_addressbar":true};

Nickel-based alloys by adding other elements . 1905 system out of about 30% copper Monel (Monel) alloys, nickel alloys is earlier . Ni has good mechanical , physical and chemical properties by adding a suitable element to increase its oxidation resistance, corrosion resistance, high temperature strengthCarbon Steel Welding Electrodecertain physical properties. Nickel alloy materials can be used as electron tubes , precision alloy ( magnetic alloy , precision resistance alloys , electric alloys, etc. ) , nickel-based alloys and nickel-based high-temperature corrosion resistant alloys and shape memory alloys. Development in the energy , chemical, electronics , marine, aviation and aerospace sectors , nickel alloys have a wide range of applications . var addthis_config = {"data_track_addressbar":true};

Nickel-base superalloy . Major alloying elements are chromium, tungsten, molybdenum, cobalt, aluminum , titanium, boron , zirconium, etc. . Wherein the chromium as an anti- oxidation and anti- corrosion, strengthening effect from the other elements . At 650 ~ 1000 ℃ high temperature have high strength and resistance to oxidation and corrosion of gas is the most widely used high-temperature alloys , high temperature strength in the highest class of alloys. The talents are scarce mainly nickel alloy bars Cheng LinIn the steel network of excellence . For the manufacture of aircraft engine blades and rocket engines , nuclear reactors, high temperature energy conversion equipment parts . ② nickel-based corrosion resistant alloys . Aluminium Welding Electrodes are copper, chromium, molybdenum . Has a good overall performance, resistance to corrosion and stress corrosion of various acid . The first application is the nickel-copper alloy , also known as Monel ; addition to nickel-chromium alloys, nickel-molybdenum alloys, nickel- chromium-molybdenum alloy. For the manufacture of a variety of corrosion-resistant components. ③ resistant nickel-based alloys. Main alloying elements chromium, molybdenum , tungsten, but also contains small amounts of niobium , tantalum and indium . In addition to having wear resistance , its resistance to oxidation, corrosion , welding performance is good. Wear parts can be manufactured , can also be used as coating material , by means of welding and coating process to be coated on the other surface of the substrate . ④ nickel-based precision alloy . Including nickel-based soft magnetic alloys , nickel-based alloys and nickel-based precision resistance heating alloys. The most commonly used soft magnetic alloy containing 80% nickel- nickel alloy with Lin ChengPermalloy so , the maximum magnetic permeability and high initial permeability , low coercive force , in the electronics industry is important core material . Nickel-based alloy precision resistor main alloying elements chromium , aluminum, copper , this alloy has a Flux Cored Welding Wire, low temperature coefficient of resistivity and good corrosion resistance , for the production of resistors. Nickel-based heating alloys containing 20% of nickel chromium alloy with good oxidation resistance, corrosion resistance, can be a temperature of 1000 ~ 1100 ℃ long-term use . ⑤ nickel-based shape memory alloys. Ti- 50 (at)% nickel alloy . Its recovery temperature is 70 ℃, the shape memory effect. Small changes in the proportion of nickel titanium component , can reply to the temperature 30 ~ 100 ℃ range. Used for manufacture of spacecraft used automatically open structure, the aerospace industry with the self- excitation fasteners used on biomedical artificial heart motors. var addthis_config = {"data_track_addressbar":true};