Temper graphite

Malleable iron Temper graphite F.P Silver-gray Heat treatment... 

Temper-kohle, /. temper carbon, graphitic carbon. -kohlebildung, /. formation of temper carbon, graphitization. -mittel, n. (Metal.) annealing or tempering material, packing,... 

The dimensions of the stainless-steel micro structured reformer are 75 mm x 45 mm x 110 mm. It consists of a stack of micro structured steel foils coated with catalyst and tempered by heating cartridges in the reactor housing. Laser-cut graphite foils were used to seal the reformer under operating conditions up to 200 °C at a flow rate up to 900 ml min-1 and a residence time of 0.07 s. 

Heating the steel to some appropriate temperature for a short time and then cooling it rapidly in order to give it the desired mechanical properties is known as tempering. In this way, the ratio of carbon present as graphite and as cementite can be varied within rather wide limits. Table 20.3 shows the composition, properties, and uses of various types of steel. 

There are often questions related to how much graphitization occurs in the range of time/temper-ature/atmosphere parameters of the blast furnace. It is known that the reactivity of coke is increased significantly by the presence of alkali, which tends to concentrate in the lower portion of the furnace. This effect would be pronounced with the lower-reactive coke and results in reducing the difference between the reactivity of all cokes. 

MaUeahle iron is made from white iron by a two stage heat treatment process. The resultant structure contains excess graphite in the form of tempered nodules. Because white iron is used, castings can be thiimer than 76 mm (3"). Malleable iron has found applications for the hearing surfaces of heavy parts of farm equipment, trucks, railroad equipment, and to a certain extent in some slurry applications. 

Spheroidal graphite cast iron 800/2 (tempered martensite) (Q-f T) 800 2... 

The part of the total carbon in steel or cast iron that is present in elemental form as graphite or temper carbon. Contrast with combined carbon. 

Loop No. 10, which was normalized from 954°C and tempered at 732°C after welding, stood up poorly when compared with other tests. The heat-treating was done in an argon atmosphere, and no subsequent alteration was made to the surface left by the heat treatment. This heat treatment was thought, from some observations in the pumped loops, to improve corrosion resi,stance. It is believed that the poor results of test No. 10 are due to alteration of the surface during the heat treatment and not to the metallurgical structure of the steel. Loops No. 11 and 12 had Be and graphite inserts in the hot leg to study their effect on mass tramsfer and also the stability of U, Mg, and Zr concentrations. No detrimental effects on either have been observed. 

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