sintered metal-Something About Sintered Metal Powder Bearings

According to thepowder metal forms of friction on work， bearings can be divided into rolling bearings and plain bearings。 And the latter can further be divided into self-lubricating bearings， oil lubricated bearings and gas lubricated bearings。

Bearings that produced by powder metallurgy method generally known as lurgy self-lubricating bearings， sintered metal powder bearings， and sintered metal bearings。

Powder metallurgy oil-impregnated bearing is a kind of alloy product。 When the shaft rotates， due to the friction between the shaft and bearings， bearing temperature will be increased and there will be a pump suction function。 As a result， oil will leak on the internal diameter of the friction surface。 When the shaft stops rotating， the oil will be back to the inside of bearings。 It is the working process of self-lubricating bearings。 Therefore， these products have less consumption of lubrication oil。 They can operate in a long period of time without the offering of external oil。 They are especially suitable for some special places。

Oil-impregnated bearings have many advantages。 Firstly， they are less noisy than the rolling bearings。 The vibration is small。 It is easy to produce them。 They do not require special oil supply。 Besides， they have flexible shape design。 They can be manufactured in a large amount。 The prices are comparatively low。

At the same time， they also carry a lot of disadvantages。 Because they are sliding bearings， their friction coefficient is bigger than the rolling bearings´。 Besides， costs will be high if they are produced in a small scale。

It should be clarified that the name of the oil-impregnated bearings does not mean that they do not require additional oil。 It just shows that they have already carried a certain amount of oil。 And it is unnecessary to add a lot of oil to them。

Sintered metal powder bearing has become essential part for the development of the automotive， appliance， audio equipment， office equipment， precision machinery。 Currently， according to bearing usage， the main transport machinery such as cars account for about 41%。 And the industrial machinary like office machinery take up about 21%。 Other applications account for about 5%。

Except for the important usage of the sintered metal powder bearing， the amount of bearing material is increased gradually。 Meanwhile， it plays a more and more important role in the manufacturing of machinery。 Now， sintered metal powder bearing material is not only the substitute for some traditional bearing alloys， but also a kind of important structural material in the mechanical manufacturing industry。

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powder metal-Metal Forming

Over the years， powder metalpeople have discovered and learned new things to make things much simpler to do。 Processes such as metal forming used to be quite difficult to accomplish because of the very limited knowledge and equipment available to them。 Fortunately， all the hard workpowder metal and perseverance of man paid off， thanks to their never ending craving for knowledge and information。

Nowadays， we see a lot of materials and goods made out of metals。 The Iron Age period was like the catalyst that led us to what we are now。 The prehistoric men´s use of steel and iron as weapons and tools served as the foundation to the more complex and multifaceted process that we now call metal forming。

Metal forming refers to any process that involves molding or shaping a certain type of metal into a desired form。 Forming is classified into five groups。 First， there is mechanical working， which is the most common among the five。 This includes processes like drawing， forging， rolling， extrusion and many more。 The other categories are casting， electroforming， fiber and forming and joining。

In metal forming， there are several kinds of equipment used。 Remember that it is a process that reshapes a metal。 So a tool that is sturdy and durable enough to be able to create enough force to cause a change in the form of the metal is needed。

One of the most commonly used is the metal-folding machine。 It is easier to handle compared to the others。 You， being the operator， need not exert too much effort in order to makesintered metal it work。 The machine is efficient enough and is safe to use。

Another metal forming equipment is called a roll-bending machine。 This machine has between two and four rolls that rotate next to each other。 When a metal is inserted between the rollers， the metal is bent into either cylindrical segments， elliptical segments， cones or just flattened surfaces。

An angle-bending machine is more focused in creating finished products that are structural-shaped like beams，sintered metal square tubes， aluminum extrusions and channels。 It comes in three-roll single or double pinch types， four roll types， horizontal roll types， and more。

powder metal-Titanium Metal Powder

Have you ever thsintered metalought about that how a heavy aircraft can fly high in the air withoutsintered metal falling to the ground? Which metal they are made from that enables them to fly taking people place to place? You may hear somebody to have a hip transplantation which is made up of metal。 Does not it seem to you strange? We know heavy metals are always rejected by our body。 Then what metal they are made from? If you consider titanium， you are right。 This magic metal is titanium and its performance improves to a great extent when alloyed with some other metals。 Titanium metal powder is employed as a key metal for this purpose。

Since 1940´s， titanium metal and its alloys have been proven technically superior and cost-effective materials。 Titanium has been selected more and more often as the �metal of choice� for applications where corrosion resistance， light weight， strength and biocompatibility are important。 For these properties it is being used in a variety of applications like in industrial， marine， automobiles， aerospace and in many other commercial sectors。

Titanium metal powder is dark gray in color。 Supplies of titanium in its pure form arepowder metal rare， only five percent of the titanium mined today is used in its pure metal form。 The metal is as strong as steel with only 45% of its weight。 When it is alloyed with other metals， the strength and the ability to withstand extreme temperature improves greatly。

Titanium has the ability to be coated in acidic environment that make it corrosion resistance topowder metal acids。 It is at least twenty times more erosion resistant than the copper-nickel alloys。 It is also nontoxic and biocompatible。 These properties make titanium and its alloys useful in a wide range of structural， chemical， petrochemical， marine and biomaterial applications。