Nitride-contained hot spraying powder core wire
A technology of powder core wire and nitride, which is applied in the field of thermal spray repair
Active Publication Date: 2011-04-13
北京赛亿科技有限公司
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[0007] According to the research content in recent years, although the thermal spraying materials containing nitrides have attracted the attention of various R&D personnel, the development of thermal spraying powder core wires containing nitrides is still unknown in domestic and foreign countries. Related patents and literature to report
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[0022] All thermal spraying powder-cored wires in the examples are produced by a "passive drawing flux-cored wire forming machine".
[0023] 1. Select 10×0.3 (width 10mm, thickness 0.3mm) H08A cold-rolled steel strip. Roll it into a U shape first. Get 20 grams of chromium nitride powder, 20 grams of boron nitride powder, 25 grams of titanium nitride, 12 grams of 75# ferrosilicon powder, 20 grams of ferroboron powder, and 3 grams of ferrosilicon powder. (The particle size of the powder taken is that it can pass through a 60-mesh sieve). The various powders taken are put into a powder mixer and mixed for 10 minutes, and then the mixed powder is added into a U-shaped H08A cold-rolled steel strip groove, and the filling rate is 20%. Close the U-shaped groove so that the powder is wrapped in it. Then make it pass through drawing dies with diameters of 3.0mm, 2.6mm, 2.4mm, 2.2mm, and 2.0mm, draw and reduce the diameter one by one, and finally make the diameter reach 2.0mm. The s...
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The invention relates to a nitride-contained hot spraying powder core wire which belongs to the field of hot spraying in material processing engineering and is mainly applied to the hot spraying rehabilitation of shafts, plungers, paper making drying cylinders, hydraulic turbines and aviation engine blades. The nitride-contained hot spraying powder core wire has higher wear resisting performance; current studies indicate that the wear resisting property of a nitride is studied at present, but no patent report for preparing the nitride-contained powder core wire is seen at home and abroad. The nitride-contained hot spraying powder core wire is characterized by comprising the following components in percentage by mass: 20-35 percent of CrN, 5-20 percent of BN, 15-25 percent of TiN, 4-12 percent of 75# silicoferrite, 10-20 percent of ferroboron and 3-10 percent of ferrotitanium. A coating prepared from the powder core wire developed by the invention has abrasion resistance, no occurrence of an oxidation phenomenon, high rigidity and good wearing resistance when the working temperature is higher than 1,000DEG C, and HV0.1 is larger than 2,000.
Description
technical field [0001] The invention belongs to the field of thermal spraying in material processing engineering, and the invention is mainly applied to the thermal spraying repair of shafts, plungers, paper drying cylinders, water turbines and aeroengine blades. Background technique [0002] Abrasion resistance is an important engineering property of thermal spray coatings. Wear-resistant coatings are used on some wear parts with relative motion to resist abrasive wear, adhesive wear and erosion wear. Traditional materials mainly include carbide coatings such as WC, Cr 3 C 2 , oxide ceramic coatings such as Al 2 o 3 、TiO 2 . [0003] At the working temperature of <550°C, WC (its hardness is HV1780) is usually used as the wear-resistant hard phase. The CoCr-WC powder sprayed by the HVOF process has been successfully applied to parts such as aero-engines. It is hard chromium-plated Ideal replacement for coatings. [0004] In the working temperature range of 550-900...
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IPC IPC(8): C23C4/10C23C4/12C23C4/06
Inventor 胡为峰葛爽
Owner 北京赛亿科技有限公司