CN103157768B - A kind of metal type sand-covering casting technique of high manganese steel lining plate - Google Patents

A kind of metal type sand-covering casting technique of high manganese steel lining plate Download PDF

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CN103157768B
CN103157768B CN201310076877.4A CN201310076877A CN103157768B CN 103157768 B CN103157768 B CN 103157768B CN 201310076877 A CN201310076877 A CN 201310076877A CN 103157768 B CN103157768 B CN 103157768B
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sand
metal mold
metal
covering
die cavity
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CN103157768A (en
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钟敏
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NINGGUO DONGDU CASTING CO Ltd
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NINGGUO DONGDU CASTING CO Ltd
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Abstract

The invention discloses the metal type sand-covering casting technique of a kind of high manganese steel lining plate, it design including metal mold and processing, metal type sand-covering, the preheating of metal mold, melting casting, cooling and post-treating and other steps, running gate system and feeding system are united by the present invention effectively, unite two into one, be effectively improved the feeding capacity of rising head;The present invention utilizes the quick cooling capacity of metal mold, the molten steel rapid solidification poured into, high manganese steel lining plate grain refinement, internal porosity, shrinkage cavity defect reduce, and surface smoothness and dimensional accuracy are greatly improved, and are effectively improved product quality, reduce production cost, improve the service life of liner plate;It is short that sand-covering technique of the present invention efficiently solves the die life that metal type cast brings, all problems occurred in liner plate outward appearance casting flaw and production process.

Description

A kind of metal type sand-covering casting technique of high manganese steel lining plate
Technical field
The present invention relates to a kind of metal type sand-covering casting field, particularly to the metal type sand-covering casting technique of the high manganese steel lining plate that a kind of mine ore dressing commonly uses.
Background technology
At present, relate to mine ore dressing both at home and abroad, grinder hammerhead or the commonly used potassium steel material of bar, there is very high toughness and work hardening capacity due to this material, it is subject to extensive use, its thickness of most of workpiece is relatively larger, it is typically in 60-150mm, water-glass sand is mostly adopted in China, clay-bonded sand explained hereafter, also Some Enterprises is had to adopt lost foam process to produce, but all can not solve the internal porosity of thick strip, shrinkage cavity defect, the problem that more can not solve the coarse grains of potassium steel essence coarse-grained steel, the present invention is based on this starting point, develop potassium steel metal type sand-covering technique, efficiently solve the problem that traditional handicraft can't resolve.
Summary of the invention
It is an object of the invention to provide the metal type sand-covering casting technique of a kind of high manganese steel lining plate, adopt new technology and solve high manganese steel lining plate internal porosity, the shrinkage cavity that prior art produces, coarse grains, the difficult problem that consistency is not high.For reaching above-mentioned purpose, the technical scheme is that
The metal type sand-covering casting technique of a kind of high manganese steel lining plate, comprises the following steps:
(1) design of metal mold and processing
According to the inside and outside metal mold shape of cast shape design, adopting casting pig or spheroidal graphite cast-iron moulding, by machine-tooled method molding, metal mold wall thickness control is at 15-20mm;Whole mould is made up of the top box of waterglass sand mold and the nowel of metal mold;Top box is provided with dead head, and waterglass sand mold is provided with passage, and passage spacing is 50-100mm, has and leads to die cavity, also has and does not lead to die cavity;Nowel is provided with and emits mouth region, emits and is provided with rising head seat in mouth region, and rising head seat surrounding is waterglass sand mold, and rising head seat is corresponding with rising head, and rising head seat is connected with liner plate die cavity by riser neck;What metal mold lower end was provided with that liner plate die cavity is connected penetrates Sha Kou, and diameter of phi is 10-15mm, and tilts 1-3 ° to liner plate die cavity direction;The distribution of metal mold surrounding has several steam vent connected with liner plate die cavity, is provided with venting plug in steam vent;
(2) metal type sand-covering
Layer of sand is covered by penetrating sand machine by what cover that sand injects that liner plate die cavity inner surface is provided with 5-15mm compressing air for power, shooting pressure controls at 0.4-0.6MPa, the described sand that covers is resin sand, adopt the low aerofluxus self-hardening furan resin of nitrogen-free, the proportioning of its resin sand is: yellow ground 95-100%, self-hardening furan resin 0.5-2.5%, sulfonic acid solid agent 0.005-0.02%;
(3) preheating of metal mold
The preheating of metal mold carries out on portable oven, toasts 15-20min, winter proper extension baking time, temperature controls at 180-250 DEG C;
(4) melting casting
The composition design of the steel preparing high manganese steel lining plate is as follows: C1.10-1.45%, Si0.50-1.20%, Mn12.0-16.0%, Cr1.50-2.50%, Mo0.80-1.20%, B0.40-0.60%, Y0.02-0.04%, Sc0.03-0.05%, P≤0.04%, S≤0.03%, surplus is Fe;
Steel scrap, the pig iron, foundry returns are put in smelting furnace and melted, smelting temperature is 1480-1520 DEG C, it is subsequently adding ferrosilicon, ferromanganese, ferro-boron and ferrochrome adjusting component extremely above-mentioned scope, molten steel can be gone out after aluminium deoxidation, the rare earth ferrosilicon alloy of Metal Weight 1.2-1.5% it is previously added in casting ladle, by the method that pours, molten steel is carried out microalloying and Metamorphism treatment, adjust pouring temperature to 1460-1480 DEG C, and be poured in the metal mold that step (3) preheats by dead head;
(5) cooling and post processing
After cast air-cooled to 300 DEG C with lower open die knockout removing from mould, after sand removal, grinding process, namely obtain manganese foundry goods.
The proportioning of described water-glass sand is: yellow ground 55-65%, do not come sand 10-15%, waterglass 5-6%, α starch 1-2%, yellow soil 3-5%, sodium bentonite 4-6%, modified tree ash 0.5-1%, water 3-4%.
Described modified tree ash is prepared by following methods: takes a certain amount of tree ash and adds in high-speed mixer, add the Di(dioctylpyrophosphato) ethylene titanate being equivalent to the polyisobutylene of tree ash weight 2-3%, the sodium lignin sulfonate of 2-3%, the nano-silicon lime stone of 3-5%, 0.4-0.6%, with 2000-3000rpm high-speed stirred 20-30min in 80-90 DEG C of water-bath, drying, attrition grinding becomes superfines.
The trade mark of described self-hardening furan resin and sulfonic acid solid agent respectively XY90-0, XY-GS03, produce by Suzhou Xingye Material Technology Co., Ltd..
The invention have the benefit that
(1) running gate system and feeding system are united by the present invention effectively, unite two into one, and are effectively improved the feeding capacity of rising head;
(2) present invention utilizes the quick cooling capacity of metal mold, the molten steel rapid solidification poured into, high manganese steel lining plate grain refinement, internal porosity, shrinkage cavity defect reduce, surface smoothness and dimensional accuracy are greatly improved, it is effectively improved product quality, reduces production cost, improve the service life of liner plate;
(3) to efficiently solve the die life that metal type cast brings short for sand-covering technique of the present invention, all problems occurred in liner plate outward appearance casting flaw and production process;
(4) present invention is easy to batch production, tissue mechanical equalization.
Accompanying drawing explanation
Fig. 1 is the structural representation of liner plate casting mould of the present invention, wherein (1) die cavity, (2) rising head, (3) water-glass sand, (4) common sandbox, (5) venting plug, (6) metal type dies, (7) cover layer of sand, (8) Sha Kou is penetrated, (9) riser neck, (10) rising head seat, (11) steam vent.
Detailed description of the invention
The metal type sand-covering casting technique of a kind of high manganese steel lining plate, comprises the following steps:
(1) design of metal mold and processing
According to the inside and outside metal mold shape of cast shape design, adopting casting pig or spheroidal graphite cast-iron moulding, by machine-tooled method molding, metal mold wall thickness control is at 15mm;Whole mould is made up of the top box of waterglass sand mold and the nowel of metal mold;Top box is provided with dead head, and waterglass sand mold is provided with passage, and passage spacing is 80mm, has and leads to die cavity, also has and does not lead to die cavity;Nowel is provided with and emits mouth region, emits and is provided with rising head seat in mouth region, and rising head seat surrounding is waterglass sand mold, and rising head seat is corresponding with rising head, and rising head seat is connected with liner plate die cavity by riser neck;What metal mold lower end was provided with that liner plate die cavity is connected penetrates Sha Kou, and diameter of phi is 12mm, and tilts 2 ° to liner plate die cavity direction;The distribution of metal mold surrounding has several steam vent connected with liner plate die cavity, is provided with venting plug in steam vent;
(2) metal type sand-covering
Layer of sand is covered by penetrating sand machine by what cover that sand injects that liner plate die cavity inner surface is provided with 10mm compressing air for power, shooting pressure controls at 0.5MPa, the described sand that covers is resin sand, adopt the low aerofluxus self-hardening furan resin of nitrogen-free, the proportioning of its resin sand is: yellow ground 98%, self-hardening furan resin 1.985%, sulfonic acid solid agent 0.015%;
(3) preheating of metal mold
The preheating of metal mold carries out on portable oven, toasts 15min, winter proper extension baking time, temperature controls at 220 DEG C;
(4) melting casting
The composition design of the steel preparing high manganese steel lining plate is as follows: C1.30%, Si0.85%, Mn14.5%, Cr1.86%, Mo0.98%, B0.54%, Y0.031%, Sc0.042%, P≤0.04%, S≤0.03%, surplus is Fe;
Steel scrap, the pig iron, foundry returns are put in smelting furnace and melted, smelting temperature is 1520 DEG C, it is subsequently adding ferrosilicon, ferromanganese, ferro-boron and ferrochrome adjusting component extremely above-mentioned scope, molten steel can be gone out after aluminium deoxidation, the rare earth ferrosilicon alloy of Metal Weight 1.5% it is previously added in casting ladle, by the method that pours, molten steel is carried out microalloying and Metamorphism treatment, adjust pouring temperature to 1480 DEG C, and be poured in the metal mold that step (3) preheats by dead head;
(5) cooling and post processing
After cast air-cooled to 300 DEG C with lower open die knockout removing from mould, after sand removal, grinding process, namely obtain manganese foundry goods.
The proportioning of described water-glass sand is: yellow ground 63%, do not come sand 15%, waterglass 6%, α starch 1.5%, yellow soil 5%, sodium bentonite 5%, modified tree ash 0.5%, water 4%.
Described modified tree ash is prepared by following methods: takes a certain amount of tree ash and adds in high-speed mixer, add be equivalent to the polyisobutylene of tree ash weight 2%, 3% sodium lignin sulfonate, 4% nano-silicon lime stone, 0.5% Di(dioctylpyrophosphato) ethylene titanate, with 3000rpm high-speed stirred 20min in 90 DEG C of water-baths, drying, attrition grinding becomes superfines.
The trade mark of described self-hardening furan resin and sulfonic acid solid agent respectively XY90-0, XY-GS03, produce by Suzhou Xingye Material Technology Co., Ltd..
After testing, the mechanical property of the high manganese steel lining plate that the present embodiment is produced is: hardness 125.7HRC, impact flexibility 93.5J/cm2

Claims (4)

1. the metal type sand-covering casting technique of a high manganese steel lining plate, it is characterised in that comprise the following steps:
(1) design of metal mold and processing
According to the inside and outside metal mold shape of cast shape design, adopting casting pig or spheroidal graphite cast-iron moulding, by machine-tooled method molding, metal mold wall thickness control is at 15-20mm;Whole mould is made up of the top box of waterglass sand mold and the nowel of metal mold;Top box is provided with dead head, and waterglass sand mold is provided with passage, and passage spacing is 50-100mm, has and leads to die cavity, also has and does not lead to die cavity;Nowel is provided with and emits mouth region, emits and is provided with rising head seat in mouth region, and rising head seat surrounding is waterglass sand mold, and rising head seat is corresponding with rising head, and rising head seat is connected with liner plate die cavity by riser neck;What metal mold lower end was provided with that liner plate die cavity is connected penetrates Sha Kou, and diameter of phi is 10-15mm, and tilts 1-3 ° to liner plate die cavity direction;The distribution of metal mold surrounding has several steam vent connected with liner plate die cavity, is provided with venting plug in steam vent;
Metal type sand-covering
Layer of sand is covered by penetrating sand machine by what cover that sand injects that liner plate die cavity inner surface is provided with 5-15mm compressing air for power, shooting pressure controls at 0.4-0.6MPa, the described sand that covers is resin sand, adopting the low aerofluxus self-hardening furan resin of nitrogen-free, the proportioning of its resin sand is: yellow ground 98%, self-hardening furan resin 1.985%, sulfonic acid solid agent 0.015%;
The preheating of metal mold
The preheating of metal mold carries out on portable oven, toasts 15-20min, winter proper extension baking time, temperature controls at 180-250 DEG C;
Melting is cast
The composition design of the steel preparing high manganese steel lining plate is as follows: C1.10-1.45%, Si0.50-1.20%, Mn12.0-16.0%, Cr1.50-2.50%, Mo0.80-1.20%, B0.40-0.60%, Y0.02-0.04%, Sc0.03-0.05%, P≤0.04%, S≤0.03%, surplus is Fe;
Steel scrap, the pig iron, foundry returns are put in smelting furnace and melted, smelting temperature is 1480-1520 DEG C, it is subsequently adding ferrosilicon, ferromanganese, ferro-boron and ferrochrome adjusting component extremely above-mentioned scope, molten steel can be gone out after aluminium deoxidation, the rare earth ferrosilicon alloy of Metal Weight 1.2-1.5% it is previously added in casting ladle, by the method that pours, molten steel is carried out microalloying and Metamorphism treatment, adjust pouring temperature to 1460-1480 DEG C, and be poured in the metal mold that step (3) preheats by dead head;
Cooling and post processing
After cast air-cooled to 300 DEG C with lower open die knockout removing from mould, after sand removal, grinding process, namely obtain manganese foundry goods.
2. the metal type sand-covering casting technique of a kind of high manganese steel lining plate according to claim 1, it is characterized in that, the proportioning of described water-glass sand is: yellow ground 63%, do not come sand 15%, waterglass 6%, α starch 1.5%, yellow soil 5%, sodium bentonite 5%, modified tree ash 0.5%, water 4%.
3. the metal type sand-covering casting technique of a kind of high manganese steel lining plate according to claim 2, it is characterized in that, described modified tree ash is prepared by following methods: takes a certain amount of tree ash and adds in high-speed mixer, add the Di(dioctylpyrophosphato) ethylene titanate being equivalent to the polyisobutylene of tree ash weight 2-3%, the sodium lignin sulfonate of 2-3%, the nano-silicon lime stone of 3-5%, 0.4-0.6%, with 2000-3000rpm high-speed stirred 20-30min in 80-90 DEG C of water-bath, drying, attrition grinding becomes superfines.
4. the metal type sand-covering casting technique of a kind of high manganese steel lining plate according to claim 1, it is characterized in that, the trade mark of described self-hardening furan resin and sulfonic acid solid agent respectively XY90-0, XY-GS03, produce by Suzhou Xingye Material Technology Co., Ltd..
CN201310076877.4A 2013-03-11 2013-03-11 A kind of metal type sand-covering casting technique of high manganese steel lining plate Active CN103157768B (en)

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