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Tool steels nickel

Powder Formation. Metallic powders can be formed by any number of techniques, including the reduction of corresponding oxides and salts, the thermal dissociation of metal compounds, electrolysis, atomization, gas-phase synthesis or decomposition, or mechanical attrition. The atomization method is the one most commonly used, because it can produce powders from alloys as well as from pure metals. In the atomization process, a molten metal is forced through an orifice and the stream is broken up with a jet of water or gas. The molten metal forms droplets to minimize the surface area, which solidify very rapidly. Currently, iron-nickel-molybdenum alloys, stainless steels, tool steels, nickel alloys, titanium alloys, and aluminum alloys, as well as many pure metals, are manufactured by atomization processes. [Pg.699]

Superhydrophobicity is the ability of some surfaces to imitate the water repeUency of lotus leaf. Superhydrophobic surfaces can also exhibit self-cleaning properties, which are useful for automobiles because droplets that roll off of the surface carry away particles that are larger than microstmcture spacing. The materials that can be microstructured by the approach presented include stainless steels, tool steel, nickel, titanium, copper and carbide steels. [Pg.783]

Weld hardfacing coatings, for example, high-carbon iron-chromium alloys, tool steels, nickel-chromium-boron alloys, cobalt-base alloys, and austenitic manganese steels... [Pg.61]

Any electrically conductive material irrespective of material hardness, commonly, tool steels, nickel alloys and titanium alloys. Ceramics and copper alloys are also processed occasionally. [Pg.165]

Induction Furnace. The high frequency coreless induction furnace is used in the production of complex, high quaUty alloys such as tool steels. It is used also for remelting scrap from fine steels produced in arc furnaces, for melting chrome—nickel alloys and high manganese scrap, and more recentiy for vacuum steelmaking processes. [Pg.375]

This process uses a moving laser beam, directed by a computer, to prepare the model. The model is made up of layers having thicknesses about 0.005-0.020 in. (0.012-0.50 mm) that are polymerized into a solid product. Advanced techniques also provides fast manufacturing of precision molds (152). An example is the MIT three-dimensional printing (3DP) in which a 3-D metal mold (die, etc.) is created layer by layer using powdered metal (300- or 400-series stainless steel, tool steel, bronze, nickel alloys, titanium, etc.). Each layer is inkjet-printed with a plastic binder. The print head generates and deposits micron-sized droplets of a proprietary water-based plastic that binds the powder together. [Pg.179]

Creaies a diffused hum (boron compoundsl case. Base nieials are alloy and tool steels cobalt- and nickel-base alloys Process temperature range is 400-1150 C (750-2100nFi. [Pg.763]

General Motors Corporation constructed such a mold for a production trial of the 1974 Corvette fascia (which actually started the development of RIM). This mold was tool steel with a highly polished nickel-... [Pg.411]

Experience has shown that the finish on the part surface is a direct function of the mold finish, and that the mold finish is a direct function of the quality of the mold material. Excellent results have been obtained using high-quality, nickel-plated, tool steel molds and electroformed nickel shells. [Pg.412]

Because nylon RIM systems are low in viscosity and tend to polymerize first at the hot tool surface, they reproduce the condition of the tool surface very faithfully. Very high gloss parts can be produced. On the negative side, however, scratches or contamination on the tool surface will show up clearly on the part. Hard surfacing with chrome or nickel will minimize problems from tool damage, as will use of a hardened tool steel. Where parts are not to be painted, a textured surface or an SFE 2 finish on the tool also minimized these effects. [Pg.160]

Mold design. PTFE resins are molded in molds similar to those utilized for thermosetting resins or metal powders. A complete mold consists of a cylindrical or rectangular die and upper and lower end plates and a mandrel for annular parts. These parts are normally made of tool steel to allow machining, and plated with chromium or nickel to protect them from corrosion. Occasionally, the end plates are made of brass or plastics such as nylon. A small diametrical clearance is designed in the end plates to allow easy assembly and air escape. [Pg.163]

Superabrasive tools, primarily PCBN, have been used to successfully weld ferritic steels, ferritic stainless steels, austenitic stainless steels, nickel-base superalloys. Invar, and Narloy-Z. Attempts to weld titanium with PCBN tools have been inconclusive. Tool life of 80 m (260 ft) has been demonstrated in FSW of 1018 steel, and very low tool wear has been reported on all other alloys. The primary concern in tool life continues to be fracture, and developments in PCBN grades continue to improve the fracture toughness of the FSW tools. The PCBN tools provide an extremely smooth finish when used for FSW or FSP. [Pg.119]


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Nickel steels

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