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 Posted: Thu 2:39, 20 Jan 2011 Post subject: stivali ugg To provide high quality ductile iron a |
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,[link widoczny dla zalogowanych]
To provide high quality ductile iron automotive castings
, And its effect was better than the only molybdenum, and the economy. According to the casting half-cooling time, calculated using the generalized Dodd hardenability of high chromium cast iron of the formula, find the content of alloying elements. Accordingly produce castings,[link widoczny dla zalogowanych], good wear resistance. Key words: high chromium white cast iron; half-cooling temperature; half-cooling time. Key words: TG251.2 Document code: BTheBestChemicalCompositionDesignofHigh-ChromiumWlliteCastIronZIShu, SONGRun-ze, ZHANGYun-xia2f1. CollegeofMaterialsScienceandEngineering, BeijingPolytechnicUniversity, Beijing100022, China; 2. JiangsuMechano-ElectricResearchInstitute, Xuzhou221006, China) Abstract: ComparedwithusingonlyMo, obviouslybettereffectcanbeobtainedbyusingmultiplealloyelementstoincreasethehardenabilityofthehigh-Crwhitecastiron. Accordingtothehalf-coolingtime, contentsofeveryalloyelementweredeterminedbyadoptingthebroadsenseDodd-�� formulaforcalculatinghardenabilityoftheHigh-Crwhitecastiron. Thecastingsproducedbasedonthecalculationresultshaveagoodwearresistingproperty. Keywords: highCrcastiron; half-coolingtemperature; half-coolingtime. High chromium white cast iron pieces in the application of wear before most of the martensite obtained by quenching in air, and thus high hardness, good wear resistance. When the casting cross-section is thick,[link widoczny dla zalogowanych], to be lit for the quenching of molybdenum alloying elements added to increase hardenability. As l5-3 High chromium cast iron, containing up to 3% molybdenum, can quench the casting wall thickness up to 120mm into martensite. Students can increase the hardenability of the alloy elements l also Ni, Cu, Mn and so on. The current soaring price of Mo, how to reduce the molybdenum content and high content of alloying elements to increase the hardenability of chromium cast iron is a priority, so both Received :2004-12 A Ol Author: Son Shu (1937.3 A), Male, professor, mainly engaged in casting alloys Toughening research work. To ensure that castings quenched lit Y-II reduce the casting cost. This article discusses this issue. 1 segregation of alloying elements than Sr [M] G. LairdII by electron microprobe analysis of high chromium cast iron in the alloy elements in the metal matrix and the carbide content,[link widoczny dla zalogowanych], and alloy element segregation proposed kE (SegregationRatio) concept ��l1: Sr [M] = y [M] / YM ] where sr [M] - M in the cast iron alloy element segregation ratio; Yc [M] - M alloy elements of quality in the percentage of carbide: box off box box box box box courtesy sets off box box box box box box box box box box box box box box box xx ... test all aspects of production such as casting. At present, major casting companies have caught the whole plant quality improvement and research, process discipline, quality awareness and adoption of the system certification. Job training, etc.,[link widoczny dla zalogowanych], to obtain good results. For businesses, producing quality products, is the most important word, for the provision of quality ductile iron automotive castings business organizations. Casting company attached great importance to the quality of castings, has shaped structure, application of new process technology and production process of refinement, the implementation into a two-stage management, company grasping system audit, targeted review TS16949 quality system and advanced management methods, are the focus of nuclear, product review and appraised, process audit and quality control operation. Professional to do the work.
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