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 Wysłany: Sob 17:04, 08 Sty 2011 Temat postu: air jordans Improve the high-sulfur stainless stee |
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Improve the sulfur of cutting stainless steel thermoplastic
Comparison of inclusion in the 18-8s, (furnace No. O a 8593) and 303F (same furnace No. O a 24 671 t-he 5mm samples from hot-rolled round bars of gold consumption,[link widoczny dla zalogowanych], found that I88 sulfide thin and long, and higher than more. But the rough field lines appear in multiple sulfide, silicate quantity: 303F sulfide thin and short, the amount is greater, but the field appears very few rough lines, silicate was minimal. Chiang t8 -8S,, 303F and the inclusion of imported materials CUS303 evaluation results are shown in Table 2. Figure 5 cast jealous power S, M elements of X-ray electron image hiding 6 ESR ingot casting benefit s, Mn elements in x-ray e-inclusion, as Table 2 property rating comparison, \ sulfide oxidation Portland Yun Mu-plated ball thickness thickness thickness of Exploration and New York crude I8-835l5o5O5o35o5o3 ∞ Fl0sus3o3o5o2J5i5o can be seen from the table, 303F than 18-8s, significantly less coarse inclusions, and mixed with imported materials very basic level: the electric arc furnace steel smelting sulfur, FeS was added under acidic slag, steel slag so easily separated, with high sulfur content in molten steel, molten steel caused by tension, waste products were easy to roll the liquid steel, by using ESR after refining the effective removal of non-metallic inclusions. 3.3 furnace ingots (18-8s,) and ESR ingots (303F) heat plus plastic Comparison Test I showed that ESR ingot (303F) than the electric furnace steel (I88S) thermal processing performance. production practices found that 0.25% of sulfur 303F ESR ingot rolling process in hot forging process with a bowl of plastic lower than 18-8s (including s0.O9%) electric furnace steel is better ,[link widoczny dla zalogowanych], flowering head reduce the number of hot rolling process, basically eliminating the proud crack. 3 Li waterfall: Improving high-sulfur stainless steel cutting of thermoplastic 9303F After remelting, the faster the crystallization of the ingot,[link widoczny dla zalogowanych], so that elements and inclusion diffusion in the liquid phase was inhibited. Taijin components and thereby reducing the segregation of inclusions together, eliminating the distribution chain of inclusions was also fine sulfide particles, uniform distribution of volume reduction of silicate and oxide inclusions The inclusions are usually evenly distributed, small and a small number of particles on the thermal processing is beneficial. sulfur in the form of steel in terms of FeS, FeS and Fe is the formation of low melting point (about 985 ℃) eutectic, distributed in the grain boundary ,[link widoczny dla zalogowanych], when the actinium heated to 1000 ℃ ~ 1200 forged when difficulties arise eutectic melt fracture along the boundary, causing hot and crisp. As the pilot steel had a higher Mn / S ratio of MnS exists in the form of sulfur is basically to reduce the hot brittle tendency makes 1200oC ± smooth running of the thermal processing, and because of the characteristics of electroslag remelting, electroslag ingots get smaller and axial equiaxed into 15. angle of the columnar grains, but also to improve performance of the thermal processing of ingot. 34303F and 18-8s. ,[link widoczny dla zalogowanych],18-8S cutting test comparison of cutting chip real photo car (see Figure 7) observed that S, chip breaking was thick, long with a ring-shaped, 303F Turning was short, thin chip breaking. Thus, 3031 \imported materials and finish with considerable. Figure 7303F, S, 35 cost comparison of copper chip breaking and easy chip high-sulfur stainless steel 303F and tested successfully. in January 1998 started production. 1998-1999, two years, the total sales 303F Wire 60t, the output value of 240 million. generate economic benefits 560,000 yuan. electroslag remelting process electric arc furnace smelting 303F plus steel. despite an increase in cost of 200 yuan electroslag re / t of steel, but the finished product rate increased, product quality particular range of machining performance increase too, so that the use of imported materials to achieve sales prices and sales, therefore the quality improved, comparing the two. there are good economic and social benefits. 4 Conclusion (1) electric arc furnace + ESR smelting technology to produce high sulfur (025 ~ 030%) cutting stainless actinides 303F. can greatly reduce the segregation of sulfur in steel and cast sulfide to improve the morphology of fine and uniform distribution of sulphide oxidation lower level of material and silicate inclusions. to not only improve the content of sulfur-cutting, but also improved the thermal processing of steel, plastic, reduce heat brittle cracking phenomenon purpose. (2) of sulfur in steel by a 010% increase to 025% ~ 0 .30%, the cutting performance of cutting stainless steel are significantly improved, can be adapted to the needs of high-speed cutting. (3) developed 303F steel reached the physical level of similar foreign steel, with good economic and social benefits. contributions Date: 2000 .】 2-1R
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