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Castable as well as preparation method and application thereof

A pouring material and pouring molding technology, which is applied in the direction of manufacturing tools, heat treatment equipment, casting molding equipment, etc., can solve the problems of poor thermal conductivity, fatigue resistance, poor thermal conductivity, and easy cracking of the mold by alternating cold and hot, and achieve reduction Effect of pearlite content, improvement of service life, and inhibition of cracking tendency

Pending Publication Date: 2022-01-04
CHANGZHOU INST OF LIGHT IND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, materials such as heat-resistant steel, stainless steel, and heat-resistant cast iron are usually used as mold preparation materials. Due to their poor thermal conductivity and fatigue resistance, they are very easy to crack when the mold is alternately cold and hot.
[0003] High-silicon ductile iron has good heat resistance, but the material has poor thermal conductivity, which cannot meet the rapid cooling and rapid heating of mold pouring and water spraying in the aluminum-iron alloy casting process, and cracks are prone to occur
For other heat-resistant cast iron or heat-resistant vermicular graphite cast iron, the graphite flakes are many and thick, and it is also easy to crack under the condition of alternating cold and hot
In order to make the mold not easy to crack for long-term use, some molds are made of pure copper, which is very expensive, so a material with low price and good performance is needed to replace pure copper material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a special mold material for alloy casting and its preparation method. The mass percentage of its chemical composition is: C3.15%; Si1.53%; Mn0.46%; P0.03%; S0.03%; Mg0 .022%; Re0.016%, Ti0.18%, and the balance is Fe.

[0035] The preparation method of mold comprises the following steps:

[0036] (1) Weigh each raw material according to a certain mass percentage, first add 72% of pig iron and 25% of low-carbon steel to the electric furnace, after complete melting, add 0.75% of ferrosilicon and 0.46% of ferromanganese, heat up to 1480~1520℃ and add titanium Iron 0.38%, keep warm for 2~3 minutes and then release from the oven.

[0037] (2) 0.55% rare-earth magnesium-silicon alloy and 0.3% ferrosilicon alloy are used for modification treatment when it is released from the furnace. The treated molten iron is cast into sand molds, and the pouring temperature is controlled at 1360~1400°C.

[0038] (3) Perform artificial aging treatment on the mold ca...

Embodiment 2

[0040] This embodiment provides a special mold material for alloy casting and its preparation method. The mass percentage of its chemical composition is: C3.24%; Si1.60%; Mn0.55%; P0.025%; S0.022%; Mg0 .020%; Re0.017%, Ti0.14%, the balance is Fe.

[0041]The preparation method of mold comprises the following steps:

[0042] (1) Weigh each raw material according to a certain mass percentage, first add 75% of pig iron and 23% of low-carbon steel to the electric furnace, after complete melting, add 0.83% of ferrosilicon and 0.62% of ferromanganese, heat up to 1480~1520℃ and add titanium Iron 0.29%, keep warm for 2~3 minutes and then release from the oven.

[0043] (2) 0.55% rare-earth magnesium-silicon alloy and 0.3% ferrosilicon alloy are used for modification treatment when it is released from the furnace. The treated molten iron is cast into sand molds, and the pouring temperature is controlled at 1360~1400°C.

[0044] (3) Perform artificial aging treatment on the mold casti...

Embodiment 3

[0046] This embodiment provides a special mold material for alloy casting and its preparation method. The mass percentage of its chemical composition is: C3.25%; Si1.69%; Mn0.38%; P0.024%; S0.026%; Mg0 .020%; Re0.016%, Ti0.16%, and the balance is Fe.

[0047] The preparation method of mold comprises the following steps:

[0048] (1) Weigh each raw material according to a certain mass percentage, first add 75% of pig iron and 22.5% of low-carbon steel to the electric furnace, after complete melting, add 0.96% of ferrosilicon and 0.35% of ferromanganese, heat up to 1480~1520℃ and add titanium Iron 0.34%, keep warm for 2~3 minutes and then release from the oven.

[0049] (2) 0.55% rare-earth magnesium-silicon alloy and 0.4% ferrosilicon alloy are used for modification treatment when it is released from the furnace. The treated molten iron is cast into sand molds, and the pouring temperature is controlled at 1360~1400°C.

[0050] (3) Perform artificial aging treatment on the mol...

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PUM

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Abstract

The invention relates to a castable as well as a preparation method and application thereof. The castable comprises the following chemical components of, in percentage by mass, 3.0%-3.4% of C, 1.5%-1.8% of Si, 0.3%-0.6% of Mn, less than or equal to 0.04% of P, less than or equal to 0.05% of S, 0.018%-0.025% of Mg, 0.01%-0.03% of Re, 0.1%-0.2% of Ti, and the balance Fe. The invention further discloses a preparation method of a mold. A mold material is low in carbon equivalent and alloy content, the preparation method of the mold is simple, the production cost is low, and the mold has excellent crack resistance and long service life.

Description

technical field [0001] The invention relates to a casting material, in particular to a casting material with good crack resistance and a preparation method thereof. Background technique [0002] In the process of iron and steel smelting, in order to obtain the chemical composition and performance of the steel, it is necessary to add aluminum-iron alloy regularly and quantitatively for deoxidation. The production of blocks requires special metal molds to be poured and molded. Usually, the pouring temperature of the mold is above 1200°C, continuous production and cooling by spraying water. The mold works in a rapid cooling and rapid heating environment. The main reason for the failure of the mold is that it is easy to crack. The mold replacement will Reduce production efficiency and increase production costs. In the prior art, materials such as heat-resistant steel, stainless steel, and heat-resistant cast iron are usually used as mold preparation materials. Due to their poor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C33/10C21C1/08B22C9/06C21D9/00B22C9/24B22C9/02B22D1/00
CPCC22C37/10C22C33/10C21C1/08B22C9/061C21D9/0068B22C9/24B22C9/02B22D1/00
Inventor 潘安霞程凤军
Owner CHANGZHOU INST OF LIGHT IND TECH
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