Alloy gray cast iron glass mould and method for producing same

Abstract

An alloy gray cast iron glass mould and a method for producing the same belong to the technical field of glass mould materials. The alloy gray cast iron glass mould consists of the following chemical elements by mass percent: 3.35-3.55% of carbon, 1.8-2.1% of silicon, 0.5-0.7% of manganese, 0.4-0.8% of molybdenum, 0.1-0.16% of vanadium, 0.15-0.25% of titanium, 0.3-0.6% of chromium, 0.01-0.02% of sulfur, 0.03-0.04% of phosphate and the balance of iron. The alloy gray cast iron glass mould has the advantages that the mould can have good anti-oxidation performance, thermal fatigue resistance, growing resistance, thermal conductivity and low thermal expansion performance; and the reaction time of carbide forming elements and pearlite stable elements with molten iron can be obviously shortened, generation of primary carbide and pearlite can be effectively inhibited, the temperature of molten iron to be poured into a casting ladle is controlled, not only can the molten iron be thermally insulated at the discharging temperature, but also the impurities in the molten iron can be purified, and the purity of the molten iron is improved.

Description

technical field [0001] The invention belongs to the technical field of glass mold materials, in particular to an alloy gray cast iron glass mold and a preparation method thereof. Background technique [0002] Glass mold is an important equipment for forming glass products. Take forming glass containers as an example. In the process of forming glass containers, the glass container forming mold not only serves to limit the shape of glass containers, but also acts as a heat exchange medium for molten glass frit. The dual role of the glass mold, and the frequent contact with the high-temperature molten glass is subject to oxidation, growth, thermal fatigue, friction and wear with the glass container, so it is necessary to require the material used to make the glass mold to have good compactness, ease of processing, Chemical stability, outstanding specific heat and thermal conductivity, small thermal expansion coefficient, good thermal crack resistance and excellent wear resistan...

AI Technical Summary

Problems solved by technology

This patent scheme has made great achievements in the strength and hardenability of the mold material, but it contains 1.1-1.2% copper and 0.2-0.6% nickel, because both copper and nickel elements will strongly promote the formation of pearlite, thus making the mold material The proportion of pearlite in the matrix is ​​greatly increased, because pearlite will decompose into ferrite and graphite at high temperature. This decomposition process will cause expansion deformation on the surface of the mold and cause oxidative fine microscopic cracks, and over time Over time, these small cracks will expand and eventually form macroscopic cracks, leading to mold cracking and failure, which is not conducive to the long-term high-temperature working environment of glass molds.