Composite alterant for nickel aluminum molybdenum-silicon iron alloy loaded nano-aluminum-silicon oxide ball milling cast iron and preparation method thereof

Abstract

The invention relates to an alterant for ball milling cast iron, in particular to the composite alterant for the nickel aluminum molybdenum-silicon iron alloy loaded nano-aluminum-silicon oxide ball milling cast iron and a preparation method thereof. The alterant is prepared from the following raw materials, by weight, of 2-3 parts of nano-alumina, 1-2 parts of potassium fluoborate, 2-3 parts of nickel powder, 1-2 parts of aluminum powder, 1-2 parts of molybdenum powder, 0.2-0.4 part of oxidized graphene, 1-2 parts of nano silica, 3-5 parts of expanded graphite powder, 1-2 parts of monazite micro powder, 4-5 parts of ferrosilicon powder with the silicon content being 45%, 0.3-0.4 part of magnesium aluminosilicate, 20-25 parts of ethanol aqueous solutions with the concentration being 5%-10% and 0.4-0.5 part of an addition agent. Nano composite powder bodies and a nickel aluminum molybdenum-silicon iron alloy which are loaded by expanded graphite powder are bonded and loaded mutually to prepare the composite alterant with stable performance. The alterant is stable in high temperature, the nucleating effect is good, and graphite spheroidization is stable and durable. According to the alterant, the graphitizing process is facilitated, the structural organization is improved, strength and abrasion resisting are further improved, and compared with a traditional alterant, using is more convenient and faster, and the additional 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 nano-aluminum-silicon oxide on a nickel-aluminum-molybdenum-iron-silicon alloy 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, lo...

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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