Industry News
- Blade forging processing methodTurbine blade play a key role of the energy transformation, is the "heart" of the steam turbine components.Mould forging has been the main technological means for blade, different forging process on the quality of the blade is different.According to the leaf blade body type surface unilateral machining allowance size, blade forging processing methods can be divided into four kinds:1, the precision forgingProfile of unilateral machining allowance of 0.5 ~ 1.5 mm of forging called precision forging.Precision forging blades just processing hub reflectance, convex platform, as well as admission, the blade body surface polishing, do not need mechanical processing.Precision forging blades can obtain a complete metal flow, a finer grain size, in order to gain good organizational performance, precision forging blades can improve material utilization and reduce the machining time;High precision forging blades for surface quality of the raw material, the precise blanking, forging heating to do lIndustry News September 26, 2016
- The key core technology in welding industryOverall development tendency of welding technology is high efficiency, high quality, low cost, environment friendly, adapt to the new material, new structure, new functional requirements, the need for the key core technology has the following several areas:(1) the big thick long and complex welding structure of high quality, efficient, intelligent, automation of complete sets of welding technology and the key technologies is mainly visual sensing technology, intelligent and coordination of the welding process control technology, industrial robots and form a complete set of technology industrialization.Must pay attention to the domestic production of the industrialization of the industrial robot, the lack of independent industrial robot system, it is difficult to integrate the above techniques, and had been on the high-end equipment.(2) laser welding, laser and other composite welding and friction stir welding heat source of new welding technology.Key welding technology are mainly the mIndustry News September 26, 2016
- Purchasing the matters needing attention of gas ball valveNow more and more domestic gas pipeline, and today to introduce purchasing gas ball valve precautions:1, as soon as possible to reduce the valve structure height (refer to the centerline of the valve flow section to height) on the top of the valve, to reduce the depth of buried pipes.2, at the top of the valve should be equipped with fully enclosed open-close indicator, is advantageous for the check valve state, is one of the important conditions for safe operation.3, full size design, reduce the flow resistance, facilitate sweeper through a pipe or pipe detector, should also meet the constantly lose enclosed tapping machine on the pipe opening.4, reliable sealing performance, soft seal valve under the nominal 1.1 times the rated working pressure are not allowed to have any internal leakage detection, hard seal valve under the nominal 1.1 times the rated working pressure allows the internal leakage of less than 13 dnmm3 / s.This requirement is strict, such as: within 500 mm of the gasIndustry News September 26, 2016
- The integrity of the casting technology of titanium castingsDue to poor casting properties of titanium, titanium melt mold casting way set is particularly important, if by the method of casting co-cr alloy, stainless steel vertical casting way, often without all casting.Titanium investment casting way has the following requirements:Casting diameter to coarse (not less than 4 mm) and short, guarantee the titanium liquid have enough quantity, injection casting cavity through the shortest pathways;Cast moudle and joint should be bold;The number of casting way should be 3 ~ 4 root;Can adopt parallel method, also can use the lateral thrust method;Avoid to form a right Angle.The mold temperature on the properties of titanium castings surface effectsTitanium fluid is polluted by the embedding material, in addition to the vacuum degree and the embedding material with fused cast made room of related components, but also related to the mold temperature.Liquid molding at high temperature, titanium is easy to react with the embedding material, Zr, Al and SIndustry News September 20, 2016
- Butt welding flange forging processWhat is the welding flange?Butt welding flange including long neck butt welding on the surface of the flange, butt welding with neck tu flange, butt welding neck flange products and so on, it is mainly used Yu Falan and counterpart of the pipe welding, its structure is reasonable, the strength and stiffness is bigger, can stand high temperature, high pressure and repeated bending and temperature fluctuations;And its reliable sealing performance, nominal pressure of 0.25 ~ 2.5 MPa butt welding flange sealing surface concave and convex type is adopted.Informally, butt welding flange is with a neck and a circular tube transition and pipe butt welding flange.Is one of the flange pipe butt welding flanges, in different areas and are widely used in industry and the promotion, it's different in use applicable scope, need to use the environment is also different, according to certain conditions are needed to use.Butt welding flange is suitable for the nominal pressure of not more than 2.5 MPaIndustry News September 29, 2016
- Hard seal ball valve applicable occasionsHard seal ball valve applicable occasions?In eccentric metal hard seal ball valve sealing structure and sealing for the metal to metal seal, can exchange the metal sealing ring to metal seal, stainless steel plate and graphite composite plate sealing ring to metal seal.Hard seal butterfly valve drive form except electric are: manual, worm gear drive, pneumatic, etc.The average valve.Hard seal butterfly plate installed on the diameter of the pipe direction of the ball valve.Within the cylindrical passage hard seal ball valve body, disc disc around the axis of rotation, rotation Angle for 0 ° ~ 90 °, rotate to 90 °, the valve is fully open.New high life features of stainless steel butterfly valves and butterfly valves in the process of using existing problems at present, hard seal butterfly valve as a hard seal ball valve is used to realize on-off and flow control components, piping system has been used in petroleum, chemical industry, metallurgy, water and electricity is widely used inIndustry News September 29, 2016
- Precision forging forming technology type and applicationPrecision forging forming technology, also known as the shape or near net shaping technology refers to the parts after forming, need only a small amount of processing or not processing, can be used as the forming technology of mechanical components.In production practice, people used to place the precision forging forming technology is divided into: cold precision forging forming, hot forging forming, warm precision forging forming, the compound forming, block forging, the isothermal forging, forging, etc.1, the cold precision forging formingWill not be heated directly for forging metal materials, mainly including cold heading and cold extrusion piled.Cold precision forging forming technology is suitable for many varieties and small batch production, mainly used in the manufacture of automobile, motorcycle parts and some parts of tooth profile.2, hot forging formingMainly refers to the above the recrystallization temperature of precision forging forming technology.Hot forging forming pIndustry News September 22, 2016
- Stainless steel flange ball valve characteristicsIn recent years, with the continuous development of domestic economy, our country has become the industrial powerhouse, stainless steel flanged ball valves in the field of industrial demand is growing, in addition, the influence of the stainless steel flanged ball valves in the field of civil has also been gradually expanding.Today, small make up take you to understand the characteristics of stainless steel flanged ball valves.What is a stainless steel flanged ball valves?What are the characteristics?Stainless steel flanged ball valves is learned the different structure of ball valve and V valves and track ball valve and advantages to develop new products.Stainless steel flange ball valve adopts double eccentric sealing structure, wear small, small torque, good sealing performance, long service life.Stainless steel flange ball valve seat and half sphere with special hardening process, especially to adapt to the harsh working conditions is resistant to wear and tear, scouring resistanceIndustry News September 22, 2016
- Metal forged steel case board performanceDefinition: the performance of forging forging performance is what mean?Steel plate after molding, metal materials used in the forging processing method of adaptive capacity is called a forging.Forging performance, what is the point?Forging performance is good or bad, mainly depends on the metal material of plastic and deformation resistance.Metal plastic deformation, the better, so the less resistance to deformation, metal forging performance is, the better.Steel case board at the time of production after bonding machine, in the process of forging, due to the effect of heating, forging, cooling, can make the material of the organization, a lot of changes in performance, increase the chemical properties of metallic materials, but at the same time also can produce very big internal stress, and because the number of forging is different, the chemical properties of the each part is not the same, easy to cause the steel grid plate deformation, cracking and other problems, since the stiffneIndustry News September 27, 2016
- Aluminum alloy welding method and the matters needing attentionAluminum alloy is widely used in industrial products, because it has good physical properties, but due to improper selection of welding methods and welding technology parameters, creates aluminium alloy parts because of stress concentration have serious deformation after welding, or because the weld defects such as porosity, slag inclusion, incomplete fusion, result in weld metal cracks or loose material, seriously affected the product quality and performance.Small make up next to introduce the aluminum alloy welding method and aluminum alloy welding.Aluminum alloy welding method1, the tungsten electrode argon arc weldingTungsten argon arc welding method is mainly used for aluminium alloy, is a kind of good welding method, tungsten argon arc welding equipment is relatively complex, however, is not suitable in the open air under the conditions of operation.2, the resistance spot welding, seam weldingThis kind of welding method can be used to weld thickness less than 5 mm in aluminum allIndustry News September 27, 2016