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Metal-type rare earth microalloyed d-type graphite cast iron glass mold and preparation method thereof

A technology of micro-alloying and graphite cast iron, which is applied in the field of glass moulds, can solve the problems of glass products that cannot be cooled quickly, poor thermal conductivity, and limited molding speed, so as to solve the tendency of whitening, improve comprehensive performance indicators, and increase service life. Effect

Active Publication Date: 2015-11-18
SUZHOU DONGHAI GLASS MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although ductile iron has high strength and toughness, and has good oxidation resistance, due to the isolated spherical shape of its graphite, its thermal conductivity is poor, so that the glass product cannot be cooled rapidly in the mold cavity, thus limiting the molding speed. Improvement, cannot meet the requirements of rapid prototyping machines in the current market, and has limitations in the application of glass molds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) The chemical composition is proportioned according to mass percentage, C3.35%, Si2%, Mn0.4%, Cr0.3%, Mo0.4%, Ni0.9%, V<0.02%, Al<0.02% , Cu<0.02%, Ti0.05%, RE0.02%, the rest are Fe and unavoidable impurities, unavoidable impurities include P<0.05%, S<0.01%.

[0026] (2) Smelting: first put the calculated and weighed scrap steel and cast pig iron into the intermediate frequency electric furnace to heat and melt them completely, then put the ferrosilicon, ferromanganese, ferrochrome and molybdenum in proportion Iron, vanadium iron, titanium iron, electrolytic nickel, electrolytic copper, and pure aluminum are added and heated to completely melt, then adjust the temperature of molten iron to 1480°C~1500°C.

[0027] (3) Purification and inoculation: use 0.3%~0.5% of the total weight of the molten iron as the rare earth alloy ReSiFe as the purifying agent of the molten iron and 0.3%~0.5% of the total weight of the molten iron as a Si-Fe inoculant containing Ba (Si: 65~70...

Embodiment 2

[0031] According to the following mass percentage ratio: C3.55%, Si2.1%, Mn0.5%, Cr0.35%, Mo0.5%, Ni1.0%, V<0.02%, Al<0.02%, Cu<0.02 %, Ti0.08%, RE0.04%, and the rest are Cu and unavoidable impurities. The preparation method is the same as in Example 1. Impurities need to be controlled in the finished product: P<0.01%, S<0.01%.

Embodiment 3

[0033]According to the following mass percentage ratio: C3.7%, Si2.2%, Mn0.6%, Cr0.4%, Mo0.5%, Ni1.1%, V<0.02%, Al<0.02%, Cu<0.02 %, Ti0.1%, RE0.05%, and the rest are Cu and unavoidable impurities. The preparation method is the same as in Example 1. Impurities need to be controlled in the finished product: P<0.01%, S<0.01%.

[0034] D-type graphite is a kind of flake graphite, which grows between austenite dendrites. The continuity of austenite splits the continuity of graphite flakes. The gap between D-type graphite and the matrix is ​​larger than that between other flake graphite and the matrix. The gap is small. The primary austenite in the D-type graphite structure has a skeleton structure, and the eutectic austenite connects the branches of the primary austenite like a network, which improves the ability of the skeleton to resist external forces. In addition, D-type graphite is small, curly, and blunt at the end, which determines that it has little cutting effect on th...

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Abstract

The invention discloses a metal type rare earth microalloyed D-type graphite cast iron glass mould and a preparation method thereof. The glass mould comprises the following components in percentage by weight: 3.35-3.7% of C, 2.-2.2% of Si, 0.4-0.6% of Mn, 0.3-0.4% of Cr, 0.4-0.5% of Mo, 0.9-1.1% of Ni, less than 0.02% of V, less than 0.02% of Al, less than 0.02% of Cu, 0.05-0.1% of Ti, 0.02-0.05% of RE and the balance of Fe and inevitable impurities. By adopting the metal type rare earth microalloyed D-type graphite cast iron glass mould and the preparation method thereof, white tendency caused by too fast metal type cooling can be avoided; completely graphitized high temperature annealing is adopted, so that a ferrite matrix structure is obtained finally; and all the comprehensive performance indexes of D-type graphite cast iron are greatly improved, so that prerequisite requirements of the glass mould are met and the service life of the glass mould is prolonged.

Description

technical field [0001] The invention relates to the field of glass molds, in particular to a metal-type rare earth microalloyed D-type graphite cast iron glass mold and a preparation method thereof. Background technique [0002] During the forming process of glass products, glass molds are frequently in contact with molten glass above 1100°C, and suffer from oxidation, growth and thermal fatigue. The thermal balance temperature of the mold cavity is generally 450~650°C. It has been working at high temperature for a long time and friction occurs during the repeated mold opening and closing process. Therefore, the glass mold structure is required to be dense and uniform, and it should have good heat resistance, wear resistance and corrosion resistance. , Anti-thermal fatigue, anti-oxidation, anti-growth, good thermal conductivity, small linear expansion coefficient, high adhesion temperature and other characteristics. Cast iron is widely used because of its good thermal condu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/08C22C37/04C22C33/08
Inventor 唐剑锋钱燕钱健
Owner SUZHOU DONGHAI GLASS MOLD
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