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Brass Aluminum Iron Manganese Formation and prevention of macrosegregation

In copper,[link widoczny dla zalogowanych], the distribution coefficient less than 1,[link widoczny dla zalogowanych], so ~ p / dc <0, the convection model of the casting is shown in Figure 4. The convection zone paste and liquid iron-rich phase will be driven to leave the mushy zone into the liquid region at high temperature and liquid flow in the liquid region along. As rich than the milling phase density difference between the mother liquor, 』, (△ P = O.474g/cm), convection will be more than floating effect. This lead to the mushy zone reduce the amount of iron coagulation area after the accumulation of iron content. Mushy zone in the iron-rich phases in the nucleation of copper grains grew up in B l into the liquid will flow zone remelting. This may be casting a wider mushy zone to another reason. Because convection is inevitable, so even in the small experimental ingots, iron segregation is difficult to avoid. 3. Reduce the flow of iron to prevent the segregation of the time. Can effectively prevent the formation of segregation. Use cold clip is the most practical method. Propeller on the experimental industrial tests have been successful. Figure 5 shows the check ring 4 Ji Jue Huang {II casting classes within the signal Kui (sold under the system temperature data Wenquan I) a. Making a major type electric rotary reed l Jie shell, 3 hours after casting; b. Ibid pieces of purple leaf cross-section. After pouring I. 5 small resistance; c. Laboratory small cast and health. One-phase region of a {L, M of a mushy zone, S a solid phase pressure. (Continued on 3O wrapped) within the changes that increase the amount of barium salt too little or too much lack of organization emerged deterioration, resulting in performance degradation. Will not adding excessive deterioration of the phenomenon appeared, which is exactly degenerate with the sodium salt is different from Figure 8. I think this is due to the decomposition of barium salt is much more difficult than the decomposition of sodium. Addition of excess fluid in the aluminum case of high temperature does not make a lot of barium from the barium salt precipitation, but precipitation of the barium. Tests showed that long-acting modifier complex in Taiwan, the addition of barium salt is 0.6 to 1.0 is better. Z0X disk Hu j ~ t: 0 called 00600.60J_ black f. The amount of salt and add a few strong intoxicated waist 8% barium salt can increase the relationship between volume and offerings, four, conclusions I. Complex cystic mass long-term solution of the sodium salt agent after modification is easy. Barium salt modifier recession and the existence of latency problems. . . : 2. After the quick deterioration stabbed with a modification to maintain the characteristics of a long time. After the project began to change and win an end to the homogeneous and has strong ability of anti-recession after modification to maintain 4 to 8 hours, re-dissolved managed to maintain a 3 to 4 hours. 3. Jing is not only bad for the metal casting, but also in the water within 2 to 4 also apply to consultations Taijin aluminum sand casting of the modification. 4. The modifier mechanical properties of processed Taijin! O6 ~ 226MPa, 53 ~ 4 (metal type). 5. The modification of sodium and barium salts using Jing as a raw material. Source of broad, low price, easy to promote in production. ◆ test [1) tree, sun and Portugal. Paradox good at tone colored plate and melting practice. Velvet intoxicated workers monitoring Press. I983. (2) hood book Zen glycosides. Variable Chong Qing plug elements on the eutectic A BU with a S. Hao Xiao Jin Poetry stupid ring Rose on behalf of the organization's Paradox made. 1981.4:5 ~ l2-(5) weeks of the heap cabinet urticaria. Combined stack of eutectic silicon pay broom long amnesty modifier - gourd. Founder. 19806:14 ~ l8. (Bamboo mat Series: indigo Pan Xin) (Continued from page 6) leaf samples from the Tong. When only in the face with cold iron, the presence of mushy zone with the upper reduced to l0 minutes, eliminating the segregation of the thick leaves 2oomm, it is still lower convection, forming areas of iron accumulation in the post-condensation (Figure 5b). Prizes will be awarded when the upper and lower end of cold iron, the duration of the entire section of a small hand mushy zone 10, the segregation of iron is controlled, the macro organizations have become normal. V. CONCLUSIONS. 1. The tendency of iron in the casting after the condensate rich region, and the solidification sequence corresponding to the existence of a concentration gradient of iron. 2. Segregation of milling there are two bodies floating and convection-driven. In the casting conditions, the convection-driven segregation is the main reason. 3 the use of cold can effectively prevent the segregation of clip formation. 30 study was supported by the China Shipbuilding Corporation and Dalian Marine Propeller wide platform for the. Experimental and hospital Ji Cheng, Xian-for the flower bed. ● legacy Soft 1. Fang Gecheng speech. Dalian Institute of Technology. [980,32; Shishuruisi. Xi-research report Public too. A town 9.3. Flem ~ ngsM. Q, Metal1. T ~ ans. Vo1.1l \HellawellA. Ptoc, 1st. Inte ~ nat. Steel 【FoundryCongr. 1985, C [tlcago. 2g56. Qi and other side too. Summer Special taboo left base color tone. 1g8.3; 2B6. In total 725 ships. L E-thrust needle Weidan like 'analysis of records. 1975.57. Qi Fang dogs shame. Poetry training blg7g. 28. Ji Bo ridicule and so on. In particular with Institute of Technology. J082, 3 (bamboo mat series; Hu Jian)

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