Chinese Manufacturer High Quality Nimonic 90 Pipe Plate Bar
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A Nickel-Chromium-Cobalt alloy being precipitation hardening,having high stress-rupture strength and creep resistance at high temperatures up to about 950oC (1740oF). It is widely used and a well proven alloy in high temperature conditions.
Main features of Nimonic 90
● High stress fracture strength and creep resistance at high temperature
● Good resistance to high temperature corrosion and oxidation
● Age hardening
● High temperature dynamic application
Typical application of Nimonic 90
● Aviation fasteners
Other names of Nimonic 90
● W.Nr 2.4632
● W.Nr 2.4969
● UNS N07090
● AWS 030
Turning of Nimonic 90
The workpiece rotates and the turning tool moves in a straight line or curve in the plane. Turning is generally carried out on the lathe to process the inner and outer cylindrical surface, end face, conical surface, forming surface and thread of the workpiece. Turning accuracy is generally it8-it7, and surface roughness is 1.6-0.8 μ m。 1) Rough turning strives to adopt large cutting depth and large feed to improve turning efficiency without reducing cutting speed, but the machining accuracy can only reach it11 and the surface roughness is r α 20—10 μ m。 2) High speed and small feed rate and cutting depth shall be adopted for semi finish turning and finish turning as far as possible, the machining accuracy can reach it10-it7, and the surface roughness is r α 10—0.16 μ m。 3) The high-speed precision turning of nonferrous metal parts with fine grinding diamond turning tool on high-precision lathe can make the machining accuracy reach it7-it5 and the surface roughness is r α 0.04—0.01 μ m. This kind of turning is called "Mirror Turning".
Milling of Nimonic 90
Milling refers to the use of rotating multi edge tools to cut work pieces. It is an efficient machining method. It is suitable for machining planes, grooves, various forming surfaces (such as flower keys, gears and threads) and special surfaces of molds. According to the same or opposite direction between the main motion speed direction and the work piece feed direction during milling, it is divided into forward milling and reverse milling. The machining accuracy of milling can generally reach it8-it7, and the surface roughness is 6.3-1.6 μ m。 1) The machining accuracy during rough milling is it11-it13, and the surface roughness is 5-20 μ m。 2) The machining accuracy during semi finish milling is it8-it11, and the surface roughness is 2.5-10 μ m。 3) The machining accuracy during finish milling is it16-it8, and the surface roughness is 0.63-5 μ m.
Planing is a cutting method that uses a planer to make horizontal relative linear reciprocating motion to the workpiece. It is mainly used for the shape machining of parts. The planing accuracy can generally reach it9-it7, and the surface roughness is RA6 3—1.6 μ m. 1) The rough planing accuracy can reach it12-it11, and the surface roughness is 25-12.5 μ m. 2) The precision of semi finish planing can reach it10-it9, and the surface roughness is 6.2-3.2 μ m. 3) The precision of finish planing can reach it8-it7, and the surface roughness is 3.2-1.6 μ m.
Grinding refers to the machining method of cutting off excess materials on the workpiece with abrasive and abrasive tools. It belongs to finish machining and is widely used in the machinery manufacturing industry. Grinding is usually used for semi finishing and finishing. The accuracy can reach it8-it5 or even higher. The surface roughness is generally 1.25-0.16 μ m. 1) The surface roughness of precision grinding is 0.16-0.04 μ m. 2) The surface roughness of ultra precision grinding is 0.04-0.01 μ m. 3) The surface roughness of mirror grinding can reach 0.01 μ Below M.
Drilling is a basic method of hole processing. Drilling is often carried out on drilling machines and lathes, as well as boring machines or milling machines. The machining accuracy of drilling is low, generally it can only reach it10, and the surface roughness is generally 12.5-6.3 μ m. After drilling, reaming and reaming are often used for semi finishing and finishing.
Boring is an inner diameter cutting process that uses a tool to expand a hole or other circular contour. Its application range generally ranges from semi rough machining to finish machining. The tool used is usually a single edge boring tool (called boring bar). 1) The boring accuracy of steel materials can generally reach it9-it7, and the surface roughness is 2.5-0.16 μ m。 2) The machining accuracy of precision boring can reach it7-it6, and the surface roughness is 0.63-0.08 μ m。 Note: machining accuracy is mainly used to characterize the fineness of products. It is a term to evaluate the geometric parameters of machined surfaces. The standard to measure the machining accuracy is the tolerance grade. There are 20 from IT01, it0, it1, it2, it3 to it18. If IT01 represents the highest machining accuracy, then it18 represents the lowest machining accuracy. General Factory and mining machinery belongs to it7 and general agricultural machinery belongs to it8. According to the different functions of product parts, the processing accuracy to be achieved is different, and the processing forms and processes selected are also different.