Sintered steel

In recent years there has been a renewed appreciation of potential beneficial effects of roughness on a macroscale. For example Morris and Shanahan worked with sintered steel substrates bonded with a polyurethane adhesive [61]. They observed much higher fracture energy for joints with sintered steel compared with those with fully dense steel, and ascribed this to the mechanical interlocking of polymer within the pores. Extra energy was required to extend and break these polymer fibrils. 

PM steel-processing techniques have not been used for the fabrication of structural parts or critical components because, as stated previously, the properties of sintered steel parts have- not... 

In tangential filtration, membranes are used as filter media. Membranes are defined as barriers of reduced thickness, across which physical and/or chemical gradients are established to facilitate the preferential migration of one or more components from a given mixture, promoting their separation (Klein, 1991). They are usually made of polymers or inorganic materials, such as ceramic or sintered steel. In the biopharmaceutical industry, membranes find various applications, such as production of water for injection (WFI), sterilization of culture media, buffer solutions and gases, separation of cells and cell debris, and purification and concentration of proteins. 

H. Cohrt, M. Enders, Sintered Steel and Iron , Ullmann s. ... 

Moll] Molinari, A., Baeei, T., Campestrini, P., Pellizzari, M., Tesi, B., Plasma Nilriding of Fe-Cr-Mo Sintered Steels , Powder Met, 42, 119-125 (1999) (Crys. Slrueture, Experimental, Meehan. Prop., 22)... 

Cam] Campos, M., Blanco, L., Torralba, J.M., Thermal Analysis of Prealloyed Fe-3Cr-0.5Mo Sintered Steel , J. Therm. Anal. Calorim., 84, 483-487 (2006) (Morphology, Phase Relations, Kinetics, Experimental, 20)... 

Sve] Svensson, L.E., Engstroem, U., Improved Precision of Sintered Steel Components Made from Partially Prealloyed Copper-Iron Powders , Powder Metall, 22(4), 165-174 (1979) (Morphology, Experimental, Phys. Prop., 11)... 

Corrosion rates of sintered steels have been reported for immersion testing in nitric [/3], sulforic [14-16], and acetic [17] acids. Compared to their wrought counterparts, the P/M parts exhibited much greater weight losses. In a more recent study, the authors reported a hydrogen sintered Nb-stabUized 444L stainless steel that was fully resistant in 2 % H2SO4 [/ ]. 

Strain gage measurements in sintered steel cylinder Yes Yes 3-6... 

In order to obtain the sinters, steel and graphite powders were compacted (compaction pressure of 200 MPa), and then sintered in vacuum sintering parameters T=1250°C, t=30 min, cooling rate 0.5 °C/ min,. Steel and graphite powders were used with the following proportions (expressed in mass percentage) ... 

During potentiokinetic measurements, the working electrode was provided by the sintered steel, whereas the reference electrode was saturated calomel electrode, whereas platinum... 

Corrosion current density was obtained from extrapolation of tangents to anode potentiokinetic curves with the slop>e of 0.04 V/ decade (it was adopted that the process of anode solubilisation of the sintered steels occurs according to Bockris mechanism [53-54]). The extrapolation method allowed for evaluation of the corrosion rate in composites. 

Boriding can be carried out on most ferrous materials such as plain carbon steels, low-alloy steels, tool steels, stainless steels, cast irons and sintered steels. There are a variety of methods for producing of boride diffusion coatings on steel surface. Thermochemical boronizing techniques include ... 

The CO, temperature control can be used in conventional steel molds as well as with inserts made from porous sintered material, which mainly consists of steel (TOOLVAC ). When using sintered steel, the liquid CO, flows through the capillary tubes into the expansion chamber. In the gaseous state, the CO, penetrates into the porous materiai and flows, due to the gas pressure, and is uniformly distributed over the core up to the cavity surface. There, heat can be directly withdrawn from the moided part. 

The increase in density and apparent hardness produced by steam treating is illustrated in the micrograph of a sintered steel (Fig. 4). By filling... 

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