By forging can make material organization close, carbide distribution and flow distribution is reasonable, to improve the performance and heat treatment increases the service life of dies.Casting mould parts are generally after forging processing and forming of the blank, is the purpose of the forging can get certain geometry, to save raw materials and save the processing time, reduce the cost.In the face of the mold of main work parts, especially in the heat treatment quality is higher, longer service life of parts, such as convex and concave die of punching die, forging die, plastic mould, die-casting mould cavity, in addition to the requirements to get a certain geometry, save raw materials and reduce processing time, mainly through forging to improve the performance of raw materials as the main goal.Especially in the main working parts, mould parts, therefore, have to pass before processing forging processing, mold can be long time to serve the public.

Along with the development of science and technology, people more and more is also high to the requirement of centrifugal casting, also because the performance of the casting is special, so he was very prone to corrosion, but the handling of the corrosion can be, it is not that simple, commonly used methods are far before we can't meet the requirements of people, so today will come and you say some rust by centrifugal casting method.In fact, there are several ways of centrifugal casting rust, in this simple and everybody said several, we can use the dehydration of anti-rust oil to rust, because this kind of dehydration rust-proof oil his antirust force is very strong, he can direct rust prevention on metal and some mechanical parts.Due to his own advantage so he can be very good for use in some more complex parts, like that of some of the cast aluminum, copper and some metallurgy powder to rust.We can casting for phosphating of centrifugal casting, this way, he is to distinguish, for t

Turbine fixed ball valve in some artificial environment shell test and seal test process is as follows.Turbine fixed ball valve features: the double block and discharge using floating seat spring preload turbine can be fixed ball valve, when the valve is in full open and close, under the condition of two different fluid blocking by upstream and downstream side of the seat, and the discharge valve will have the effect of discharge valve body lumen stranded content.Turbine fixed ball valve automatic relief function: when the abnormal pressure is caused by the temperature rise of stop valve body cavity medium, only the seat function can realize automatic pressure release, and completely do not need through the relief valve for pressure relief, which, when conveying liquid medium security is greatly increased.Fire safety structure: follow API607 and API6FA specification requires that the design and manufacture of valves, must have the function of fire safety is set up.Turbine fixed ball se

Three big ball valve connection believe there must be a lot of people are not very familiar with, let's together and see it.One, flange connection valvesValve flange connection, the device and remove the contrast all convenient.But than the threaded connection valves heavy, corresponding quotation price is also high.So it is suitable for all kinds of sizes and pressure pipes.But, when the temperature beyond 350 degrees, because the bolts, gasket and flange is lax, also obviously drop bolt load, to force a lot of flange connecting leakage may occur.Two, threaded connection valvesThis cohesion is generally in and out of the end into the valve cone tube or straight thread, can make its cohesion to the taper pipe nipple or road.Because this cohesion may appear larger leakage channel, so it can be used sealants, sealing adhesive tape or filler to block the channel.If the body of the material can be welded, but expansion coefficient difference is very big, maybe the large variations in tempe

High response speed of inverter power supply for welding control technology provides an ideal platform for the power, digital technology in the application of welding power source to further improve the level of the power control technology and operability.Digital control of inverter welding machine will undoubtedly have a strong development, because it greatly simplifies the circuit structure in control, improve the stability of welding machine control system, convenient for application.At present, the domestic digital welding machine with foreign digital welding machine is one of the biggest gap welding performance.Can say, what are the strengths of the digital welding machine is not digital technology itself, but the advanced welding technology.At the same time, also is the biggest advantage of with digital inverter welding machine can seat after the combination of advanced welding technology.The influence of inverter welding machine for welding machine industry is undoubtedly a rev

Composite hammer is very important in the process of production of one of the production technology of forging process and forging in many casting parts are made in the process, composite hammer head is not exceptional also, after casting this link, the use of the hammer head can significantly improve performance, today we mainly is to investigate the composite hammer forging process on the performance of what is important.From the surface, composite hammer hammer hammer head is divided into two parts and hammer handle end, are to be highlighted, hammer and hammer handle is not the same kind of material that is used by the side of hammer handle because the requirement has strong robust performance, therefore generally choose carbon steel, high chromium cast iron is generally selected hammer side material.Prefabricated hammer and hammer handle, put it in the casting pouring in another kind of liquid metal casting molding.Composite hammer head through forging can eliminate the metal smel

Sand casting is one of the casting, sand casting mold used generally made from a mix of sand mold and core.Because of sand mold casting molding materials used in the cheap, simple mould manufacturing, piece of casting production, the batch production and mass production are able to adapt to, for a long time, has been the basic technology of casting production.At present, internationally, in all casting production, 60 to 70% of the casting is made of sand mold production, and about 70% of them are using clay sand mold production.Sand mold casting of crusher wear parts at home and very common, like jaw, high chromium plate hammer, crushing wall, rolling mortar wall and so on, because in crusher equipment, as a larger wear resistant castings, relatively accuracy is not high, especially such as jaw, out of the finished product is almost no lathe polishing, crushing wall, roller rolling mortar wall, is just like casting parts need lathe polishing, so especially suitable for use sand mold ca

Compared with last month, China's manufacturing economy expanding in August, the economy running smoothly.In the monitoring of the eight plates, the biggest gains is a steel plate, the second is energy;, drop the largest is the colored plates, followed by textiles.Business club commodity supply and demand index (BCI) is 0.26, are up 1.58%, reflecting the manufacturing economy is expanding last month, the month economy running smoothly.In August to analysis, Shanghai, wuhu, wuhan and other parts of the city housing boom, boosted the iron and steel, building materials market.In the second half of the manufacturing market is expected to top high low, after the overall slant.Commodity markets or in September will be extended gains, but colour will reduce, most likely is silver, nine in the fourth quarter of the market is not optimistic.

Stainless steel tube heat treatment abroad widely used continuous heat treatment furnace with protective gas without oxidation, the intermediate heat treatment in the process of production and the final finished heat treatment, because of lack of oxidation of the surface of the light can get, and cancel the traditional pickling process.The adoption of the heat treatment process is to improve the quality of the steel tube, and overcome the pickling pollution to the environment.According to the current trend of world development, basic light continuous furnace is divided into three types:(1) the roller bottom type bright heat treatment furnace.This type furnace is suitable for large size, large quantities of steel tube heat treatment, hour yield of 1.0 tons.Can use the protective gas for high purity hydrogen, ammonia and other protective gas.Can be equipped with convection cooling system, in order to rapidly cooling pipe.(2) the bright heat treatment furnace mesh belt type.This type furn

As the steel needed for petroleum chemical industry, energy, the increase of weight, size, the weight of the ingot increases, prevent or reduce the inside of the steel ingot metallurgy defects become more difficult.On the other hand, due to the increase of ingot size weight, hydraulic press tonnage in relatively reduced, the quality of forgings standard is rising again.With the traditional upsetting technology, drawing out to break the inside of the steel ingot casting within the organization, repair metallurgical defects can not meet the requirements of the quality of forgings.Long pull, upsetting is the most widely used in large forgings forging two work steps, pull long compared with upsetting, as part of the small billet deformation, deformation, stress high defect area;So long pull is broken casting organization, repair the metallurgical defects main work step.Here is a new technology of large forgings forging drawing out: concave anvil drawing out the new process.Forging deformat