Nickel alloy welding and welding consumables
2012-10-07 by seoer8
The past 50 years, the application of technology, authoritative statistics show: nickel alloy welding consumables, technology and its applications, are numerous industrial fields to enter the global average growth rate of 6% per year! Therefore, the welding industry popular with a saying: Nickel Alloy Welding Electrodesconsumables and the process is a welding technology Heights following the carbon steel and stainless steel. This is due to the rapid development of metallurgical technology to accelerate the emergence and application of the various types of purer elements, while the variety and quality of the nickel-based materials are constantly updated, nickel alloy welding completely break through the traditional "low heat input" restricted area welding robot; abroad Mig or Tig process, can the deposition rate of 7-9 kg / h, a speed of more than 1 m / min to complete a variety of complex welding tasks. Following a brief introduction Nickel Alloy Welding Wireconsumables in a number of industrial applications:
Oil, natural gas and offshore oil industry application
With the world's energy, as well as synthetic petroleum products demand continues to expand, the demand for crude oil is increasing. However, the crude oil itself contains many pollutants, the equipment needs of the exploration of crude oil over many years of working in the very poor and polluted environment, and is not always possible to carry out maintenance and replacement. Acidic crude oil, for example, under heat and pressure, they often contain vulcanizing fluorine, sulfur, carbon dioxide and alkylene chloride salts and the like. The countermeasures currently is using more corrosion-resistant alloy (usually nickel - chromium - molybdenum alloy) to make related equipment. However, the prices of these materials are quite expensive, we can use surfacing to reduce costs. For example, can take advantage of the strength of the iron-based materials (such as AISI4340) characteristics to produce structural parts to improve the corrosion resistance, and then surfacing layer of nickel - chromium - molybdenum alloy produced. Such welding consumables can be selected for the field of customer: NiCrMo-3 (product number INCONEL? 625) NiCrMo-4 (INCO-WELD? C-276), NiCrMo-10 (INCONEL? 622), and so far the corrosion strongest NiCrMo-14 (INCO-WELD? 686 CPT).
Figure 1 is a sectional cross-sectional of a submersible ball valve. INCONEL? 625 surfacing, can prevent H2S caused by stress corrosion cracking. The so-called "lumen surfacing" (Bore Clad, or abbreviated BC) refers to a valve, the interface member or the inner surface of the contact member of crude oil surfacing technology. Lumen of welding wire are specially designed; They have good tensile strength using a special process to improve the effect of the wire feed from the wire feeder to the arc point of drawing at the same time the Company to ensure this wire in any one of the soldering process can achieve a stable and efficient welding results.