Composite modifier for titanium nickel-manganese iron alloy supported nano zirconia-titanium nitride nodular cast iron and preparation method of composite modifier

Abstract

The invention relates to a composite modifier for nodular cast iron, in particular to the composite modifier for titanium nickel-manganese iron alloy supported nano zirconia-titanium nitride nodular cast iron and a preparation method of the composite modifier. The modifier is prepared from the following raw materials in parts by weight: 3 to 5 parts of titanium-nickel alloy 60, 0.2 to 0.3 part of sodium fluoride, 1 to 2 parts of nano zirconia, 2 to 3 parts of nano-titanium nitride, 3 to 4 parts of nitrided ferromanganese, 3 to 5 parts of expansible graphite powder, 1 to 3 parts of ferrosilicon powder with the silicon content of 45 percent, 0.3 to 0.4 part of aluminum-magnesium silicate, 20 to 25 parts of ethanol aqueous solution with the concentration of 5 to 10 percent and 0.4 to 0.5 part of assistant. The novel composite modifier disclosed by the invention is prepared by mutually bonding and supporting expansible graphite powder supported nano powder and titanium nickel-ferrosilicon manganese alloy powder; the modifier promotes the graphitization process and improves structural organization; the mechanical property of the nodular cast iron is more excellent, and better modifying effect is efficiently obtained; and in addition, compared with a traditional modifier, the composite modifier disclosed by the invention is more convenient and quicker to use, and the production cost is reduced.

Description

technical field [0001] The invention relates to a modifier for ball milled cast iron, in particular to a composite modifier for ball milled cast iron loaded with titanium-nickel-ferromanganese alloy and nano zirconia-titanium nitride and a preparation method thereof. Background technique [0002] Nodular cast iron refers to the cast iron with spheroidal graphite obtained by adding a modifier with spheroidizing and inoculating effects. The strength of this type of cast iron has been greatly improved, and it has excellent comprehensive performance. Class is widely used cast iron. [0003] The modifiers used in the production of ductile cast iron are directly related to the performance of the product. At present, the most commonly used modifiers are rare earth magnesium and ferrosilicon series alloys. Although these modifiers have achieved relatively good modification effects, they still have some shortcomings. , ferrosilicon series modifiers have fast melting speed, low nucle...

AI Technical Summary

Problems solved by technology

[0003] The modifiers used in the production of ductile cast iron are directly related to the performance of the product. At present, the most commonly used modifiers are rare earth magnesium and ferrosilicon series alloys. Although these modifiers have achieved relatively good modification effects, they still have some shortcomings. , ferrosilicon series modifiers have fast melting speed, low nucleation rate, poor spheroidization rate, and low utilization rate of raw materials when used; and rare earth materials are also restricted by production costs; in recent years, nanomaterials have also been used as modifiers, which can be used in large quantities. Increase the number of crystal nuclei in the melt, refine the grains at the same time, and increase the density of the structure. However, due to the structural characteristics of nanomaterials, their dispersion in the melt is poor and they are easy to float. A special injection device is required to improve the Cost of production