In general, during the production of compacted graphite iron (CGI), the active residual magnesium reduces and the effect of inoculation fades after magnesium treatment. In this paper, characteristics of the thermal an...In general, during the production of compacted graphite iron (CGI), the active residual magnesium reduces and the effect of inoculation fades after magnesium treatment. In this paper, characteristics of the thermal analysis curve of CGI are compared with those of ductile iron and grey cast iron. The fading effect on the compacted graphite percentage and thermal analysis curve were also studied. Results indicate that the undercooling of CGI is as low as that of ductile iron, but CGI shows evident recalescence. In fading process, the magnesium element acts with oxygen. For a decrease in magnesium content, both the compacted graphite percentage and the austenitic liquidus temperature increase. The temperature of eutectic undercooling (TEU) decreases before the flake graphite appears. After that, TEU increases quickly, up to as high as 20℃, and then gradually decreases. The evolution of recalescence degree is opposite to that of TEU.展开更多
In this paper we research into the solution to the homogeneous input-output modelwith consumption of forward delay in which the lag is one production cycle. If supposing X(1) is anoutput vector of the first product.io...In this paper we research into the solution to the homogeneous input-output modelwith consumption of forward delay in which the lag is one production cycle. If supposing X(1) is anoutput vector of the first product.ion cyele, S(t) is the consumption vector of the t-th production cyele,W(t) = (A + B)(-1)S(t), Xi, is the right characteristic vector of(I - A)(-1) (A + B). In this paper we confirm that the necessary and sufficient conditions for economicbalanced development are for every ,where A, is the characteristic value of (I - A)(-1) (A + B) which correlates to Xi. is the economicincreasing ratio of the t-th production cycle, S is a vector subset.展开更多
文摘In general, during the production of compacted graphite iron (CGI), the active residual magnesium reduces and the effect of inoculation fades after magnesium treatment. In this paper, characteristics of the thermal analysis curve of CGI are compared with those of ductile iron and grey cast iron. The fading effect on the compacted graphite percentage and thermal analysis curve were also studied. Results indicate that the undercooling of CGI is as low as that of ductile iron, but CGI shows evident recalescence. In fading process, the magnesium element acts with oxygen. For a decrease in magnesium content, both the compacted graphite percentage and the austenitic liquidus temperature increase. The temperature of eutectic undercooling (TEU) decreases before the flake graphite appears. After that, TEU increases quickly, up to as high as 20℃, and then gradually decreases. The evolution of recalescence degree is opposite to that of TEU.
文摘In this paper we research into the solution to the homogeneous input-output modelwith consumption of forward delay in which the lag is one production cycle. If supposing X(1) is anoutput vector of the first product.ion cyele, S(t) is the consumption vector of the t-th production cyele,W(t) = (A + B)(-1)S(t), Xi, is the right characteristic vector of(I - A)(-1) (A + B). In this paper we confirm that the necessary and sufficient conditions for economicbalanced development are for every ,where A, is the characteristic value of (I - A)(-1) (A + B) which correlates to Xi. is the economicincreasing ratio of the t-th production cycle, S is a vector subset.
