CN109794594A - The production method of wear-resisting Resisting fractre trolley grid section - Google Patents
The production method of wear-resisting Resisting fractre trolley grid section Download PDFInfo
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- CN109794594A CN109794594A CN201910157474.XA CN201910157474A CN109794594A CN 109794594 A CN109794594 A CN 109794594A CN 201910157474 A CN201910157474 A CN 201910157474A CN 109794594 A CN109794594 A CN 109794594A
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Abstract
The production method that the present invention discloses a kind of wear-resisting Resisting fractre trolley grid section, sintering pallet fire grate bar technical field, making step is that low-alloy cast steel and high chromium wear resistance white cast iron are poured into two electro-smeltings respectively, control the temperature and time of two electric furnaces, after melted, first low-alloy cast steel liquid is poured into a casting mold, when low-alloy cast steel liquid naturally cools to critical-temperature, i.e. after low-alloy cast steel liquid reaches solidus, it casts again high chromium wear resistance white cast iron liquid, the weight ratio of the two is controlled, after the two is cast, then is tempered, normalizing heat treatment.Compared with prior art, the trolley grid section that the present invention makes is passed through in sintering plant 2#360m2Production testing of the sintering machine more than 2 years, service life is original monometallic high-chromium cast iron alloy service life more than 4 times, using all not occurring the too fast scaling loss of fire grate bar more than 2 years, being broken the phenomenon that avalanche is scattered, greatly reduces and be sintered cost, improve production efficiency.
Description
Technical field
The present invention relates to sintering pallet fire grate bar technical field, especially a kind of grid section of wear-resisting Resisting fractre trolley
Production method.
Background technique
Sintering industry is being smelted, fire grate bar is the critical component on sintering pallet, and maximum temperature reaches 900 DEG C when work
More than, by quick refrigeration on sintering loop, at work by high-temperature oxydation and gas attack, taken off after surface oxidation
It falls, the gap between grid section becomes larger, and when the gap between grid section is more than 8mm, fire grate bar will fail.The initial stage of oxidation is adjoint
Growth course, gap becomes smaller between grid section, and air permeability is poor, also fire grate bar is caused to fail.Especially sintering machine is using no grate-layer material
The substance that low melting point is had when sintering, under high temperature is adhered on fire grate bar, and the gap of fire grate bar becomes smaller at this time, and air permeability is poor, furnace
Grid section failure.Creep can occur under the action of fire grate bar long-time high temperature and stress, when creep is more than certain size fire grate bar
Failure.Since traditional fire grate bar is hit and is broken using magnesium iron or high-chromium alloy monometallic monoblock cast, poor toughness
It splits.Fire grate bar scaling loss is serious, avalanche is scattered and causes sintering pallet vehicle bottom hollow out, and charge level forms mouse hole not of uniform size, directly
Connect the production efficiency and production cost for influencing sintered ore materials.
Currently, the fire grate bar almost all that China's sintering pallet uses is integrally cast using monometallic material, it is multiple
Close fire grate bar almost without or seldom, therefore, consumption is big, and average life is 3-6 months, and this situation seriously affects
The production efficiency and production cost of sintered ore materials.Therefore, the service life for improving grate bar of sintering machine trolley becomes currently urgently
The a great problem of solution.
Summary of the invention
The present invention provides a kind of production method of wear-resisting Resisting fractre trolley grid section, it can solve the mistake easy to damage of existing fire grate bar
The short problem of effect, service life.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that: its making step is as follows:
A, low-alloy cast steel and high chromium wear resistance white cast iron are selected, pours into two electro-smeltings, the melting of low-alloy cast steel respectively
Temperature is 1480 DEG C -1500 DEG C, and smelting time is 1 hour~1.3 hours, and the smelting temperature of high chromium wear resistance white cast iron is 1520
DEG C -1560 DEG C, smelting time is 1 hour~1.3 hours；B, after melted, low-alloy cast steel liquid and high chromium wear-resistant spoken parts in traditional operas are cast
Iron liquid is successively poured into same casting mold, and low-alloy cast steel liquid of first casting, temperature when which casts is 1420
It DEG C -1450 DEG C, when low-alloy cast steel liquid naturally cools to critical-temperature, i.e., after low-alloy cast steel liquid reaches solidus, then pours
Cast high chromium wear resistance white cast iron liquid, the high chromium wear resistance white cast iron liquid cast when temperature be 1400 DEG C -1450 DEG C, casting it is low
The weight ratio of alloy cast steel liquid and high chromium wear resistance white cast iron liquid is 7.85g/ cm3: 7.9g/ cm3；C, the low-alloy cast steel
After liquid and high chromium wear resistance white cast iron liquid inject, workpiece polishes off dead head after being cooled to room temperature, carries out surface sand removal, then
It is tempered, normalizing heat treatment.
In above-mentioned technical proposal, more specific scheme may also is that the low-alloy cast steel liquid reaches the temperature of solidus
It is 750 DEG C~850 DEG C.
Further: the low-alloy cast steel uses ZGD410-620 low-alloy cast steel, and tensile strength is prolonged for 630MPa.
Stretching rate is 35%, ballistic work 34J.
Further: its hardness of the high chromium wear resistance white cast iron is 60HRC, ballistic work 4J, operating temperature 900
℃。
Further: the electric furnace is medium-frequency induction furnace or electric arc furnaces.
Due to the adoption of the above technical scheme, compared with prior art, the present invention having the following beneficial effects:
1, since trolley grid section of the invention is with low-alloy cast steel for female base, and height is fused in female base critical state lower surface
Chrome wear-resistant white cast iron is combined, and the anti-impact of low-alloy cast steel is not only maintained using the trolley grid section as made of the method
Hit, high tenacity the characteristics of, can effectively prevent fire grate bar and be broken because of shock, and high chromium wear resistance white cast iron by tempering+just
Have the characteristics that anti-oxidant, antiwear property is strong after fiery modifier treatment.
2, this trolley grid section is passed through in Liuzhou Steel (group) limited liability company sintering plant 2#360m2Sintering machine is more than 2 years
Production testing, service life are original monometallic high-chromium cast iron alloy service life more than 4 times, using all not occurring more than 2 years
The phenomenon that too fast scaling loss of fire grate bar, fracture avalanche are scattered greatly reduces sintering cost, improves production efficiency.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the A-A cross-sectional view of Fig. 1.
Each serial number name is as follows:
1. fire grate bar ontology working face；1-1. high-chromium alloy iron layer, 1-2. lower layer are GD410-620 steel；2. banking pin;3.
Left support foot；4. right support foot；5. left limit block;6. right limit block.
Specific embodiment
Below in conjunction with attached Example, the invention will be further described.But the present invention is not limited to following embodiments.
The production method of the wear-resisting Resisting fractre trolley grid section of the present embodiment 1, the steps include:
A, low-alloy cast steel and high chromium wear resistance white cast iron are selected, pours into melting in two medium-frequency induction furnaces, low-alloy respectively
The smelting temperature of cast steel is 1480 DEG C, and smelting time is 1 hour, and the smelting temperature of high chromium wear resistance white cast iron is 1520 DEG C, is melted
Refining the time is 1 hour；Wherein, low-alloy cast steel uses ZGD410-620 low-alloy cast steel, and tensile strength is 630MPa. extension
Rate is 35%, ballistic work 34J, its hardness of high chromium wear resistance white cast iron is 60HRC, and ballistic work 4J, operating temperature is 900 DEG C；
B, after melted, low-alloy cast steel liquid and high chromium wear resistance white cast iron liquid are successively poured into same casting mold, low conjunction of first casting
Golden cast steel liquid, temperature when which casts is 1420 DEG C, when low-alloy cast steel liquid naturally cools to critical-temperature
At 750 DEG C, after low-alloy cast steel liquid just reaches solidus, casting high chromium wear resistance white cast iron liquid, the high chromium wear-resistant are white at once
Temperature when mouth liquid cast-iron casting is 1450 DEG C, and the low-alloy cast steel liquid of casting and the weight ratio of high chromium wear resistance white cast iron liquid are
7.85g/ cm3: 7.9g/ cm3；C, after low-alloy cast steel liquid and high chromium wear resistance white cast iron liquid inject, workpiece is cooled to room
Dead head is polished off after temperature, carries out surface sand removal, then is tempered, normalizing heat treatment.
The production method of the wear-resisting Resisting fractre trolley grid section of the present embodiment 2, the steps include:
A, low-alloy cast steel and high chromium wear resistance white cast iron are selected, pours into melting in two electric arc furnaces respectively, low-alloy cast steel
Smelting temperature is 1500 DEG C, and smelting time is 1.3 hours, and the smelting temperature of high chromium wear resistance white cast iron is 1560 DEG C, when melting
Between be 1.3 hours；Wherein, low-alloy cast steel uses ZGD410-620 low-alloy cast steel, and tensile strength is 630MPa. elongation percentage
It is 35%, ballistic work 34J, its hardness of high chromium wear resistance white cast iron is 60HRC, and ballistic work 4J, operating temperature is 900 DEG C；B,
After melted, low-alloy cast steel liquid and high chromium wear resistance white cast iron liquid are successively poured into same casting mold, low-alloy of first casting
Cast steel liquid, temperature when which casts is 1450 DEG C, when low-alloy cast steel liquid naturally cools to critical-temperature 750
DEG C when, after low-alloy cast steel liquid just reaches solidus, at once cast high chromium wear resistance white cast iron liquid, the high chromium wear-resistant spoken parts in traditional operas casting
Temperature when iron liquid is cast is 1450 DEG C, and the low-alloy cast steel liquid of casting and the weight ratio of high chromium wear resistance white cast iron liquid are
7.85g/ cm3: 7.9g/ cm3；C, after low-alloy cast steel liquid and high chromium wear resistance white cast iron liquid inject, workpiece is cooled to room
Dead head is polished off after temperature, carries out surface sand removal, then is tempered, normalizing heat treatment.
The trolley fire grate bar that embodiment 1 and embodiment 2 are made is as shown in Figure 1-Figure 3, it includes fire grate bar ontology, furnace
Grid section ontology working face 1 is combined by the upper and lower, and upper layer is high chromium wear resistance white cast iron 1-1, and lower layer is low-alloy casting
Steel 1-2,1 lower end two sides of fire grate bar ontology working face are equipped with left support foot 3 and right support foot 4, the bottom of left support foot 3 and right support foot 4 to
Outer bending is stretched out, and the top two sides of fire grate bar ontology working face 1 are respectively sleeved on left limit block 5 and right limit block 6, fire grate bar sheet
The top middle section of the working face 1 of body and limited block equal-height position are equipped at intervals with two banking pins 2.
The trolley grid section worked it out by this production method, through being sintered 2# in Liuzhou Steel (group) limited liability company
Production testing of the 360m2 sintering machine more than 2 years, service life are original monometallic high-chromium cast iron alloy service life more than 4 times,
Using all not occurring the too fast scaling loss of fire grate bar more than 2 years, being broken the phenomenon that avalanche is scattered, greatly reduces and be sintered cost, mention
High production efficiency.
Claims (5)
1. a kind of production method of wear-resisting Resisting fractre trolley grid section, it is characterised in that: its making step is as follows:
A, low-alloy cast steel and high chromium wear resistance white cast iron are selected, pours into two electro-smeltings, the melting of low-alloy cast steel respectively
Temperature is 1480 DEG C -1500 DEG C, and smelting time is 1 hour~1.3 hours, and the smelting temperature of high chromium wear resistance white cast iron is 1520
DEG C -1560 DEG C, smelting time is 1 hour~1.3 hours；B, after melted, low-alloy cast steel liquid and high chromium wear-resistant spoken parts in traditional operas are cast
Iron liquid is successively poured into same casting mold, and low-alloy cast steel liquid of first casting, temperature when which casts is 1420
It DEG C -1450 DEG C, when low-alloy cast steel liquid naturally cools to critical-temperature, i.e., after low-alloy cast steel liquid reaches solidus, then pours
Cast high chromium wear resistance white cast iron liquid, the high chromium wear resistance white cast iron liquid cast when temperature be 1400 DEG C -1450 DEG C, casting it is low
The weight ratio of alloy cast steel liquid and high chromium wear resistance white cast iron liquid is 7.85g/cm3: 7.9g/cm3；C, the low-alloy cast steel liquid
After the injection of high chromium wear resistance white cast iron liquid, workpiece polishes off dead head after being cooled to room temperature, carries out surface sand removal, then do
Tempering, normalizing heat treatment.
2. the production method of wear-resisting Resisting fractre trolley grid section according to claim 1, it is characterised in that: the low-alloy casting
The temperature that molten steel reaches solidus is 750 DEG C~850 DEG C.
3. the production method of wear-resisting Resisting fractre trolley grid section according to claim 1 or 2, it is characterised in that: the low conjunction
Golden cast steel uses ZGD410-620 low-alloy cast steel, and tensile strength is that 630MPa. elongation percentage is 35%, ballistic work 34J.
4. the production method of wear-resisting Resisting fractre trolley grid section according to claim 3, it is characterised in that: the high chromium wear-resistant
Its hardness of white cast-iron is 60HRC, and ballistic work 4J, operating temperature is 900 DEG C.
5. the production method of wear-resisting Resisting fractre trolley grid section according to claim 4, it is characterised in that: during the electric furnace is
Frequency electric induction furnace or electric arc furnaces.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080057428A (en) * | 2006-12-20 | 2008-06-25 | 재단법인 포항산업과학연구원 | Grate bar manufacturing method using triple liquid casting |
| KR20080057427A (en) * | 2006-12-20 | 2008-06-25 | 재단법인 포항산업과학연구원 | Grate bar manufacturing method using duo liquid casting |
| CN101698230A (en) * | 2009-10-24 | 2010-04-28 | 内蒙古科技大学 | Method for preparing surface composite sinterer grate bars |
| CN201715862U (en) * | 2010-06-22 | 2011-01-19 | 宝山钢铁股份有限公司 | Composite reinforced sintering machine trolley grate bar |
| CN103422030A (en) * | 2013-07-19 | 2013-12-04 | 燕山大学 | High-chromium alloy for sintering pallet bar grate and manufacturing method of high-chromium alloy |
| CN103506607A (en) * | 2012-06-19 | 2014-01-15 | 高邮市四方机械有限公司 | Wear-resisting casting and production process thereof |
| CN105296872A (en) * | 2015-11-13 | 2016-02-03 | 丹阳嘉伟耐磨材料科技有限公司 | Bimetal composite high-tenacity, high-boron and high-chrome steel hammer and preparing method thereof |
| CN105908071A (en) * | 2016-05-20 | 2016-08-31 | 衡阳鸿宇机械制造有限公司 | Alloy material for manufacturing hammerhead by double-molten-metal compounding, pouring and molding sand forming and manufacturing method of double-molten-metal compounded hammerhead |
| DE102017105106A1 (en) * | 2016-03-11 | 2017-09-14 | Tiska Gmbh | COMPOSITE STEEL BAR |
-
2019
- 2019-03-01 CN CN201910157474.XA patent/CN109794594A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080057428A (en) * | 2006-12-20 | 2008-06-25 | 재단법인 포항산업과학연구원 | Grate bar manufacturing method using triple liquid casting |
| KR20080057427A (en) * | 2006-12-20 | 2008-06-25 | 재단법인 포항산업과학연구원 | Grate bar manufacturing method using duo liquid casting |
| CN101698230A (en) * | 2009-10-24 | 2010-04-28 | 内蒙古科技大学 | Method for preparing surface composite sinterer grate bars |
| CN201715862U (en) * | 2010-06-22 | 2011-01-19 | 宝山钢铁股份有限公司 | Composite reinforced sintering machine trolley grate bar |
| CN103506607A (en) * | 2012-06-19 | 2014-01-15 | 高邮市四方机械有限公司 | Wear-resisting casting and production process thereof |
| CN103422030A (en) * | 2013-07-19 | 2013-12-04 | 燕山大学 | High-chromium alloy for sintering pallet bar grate and manufacturing method of high-chromium alloy |
| CN105296872A (en) * | 2015-11-13 | 2016-02-03 | 丹阳嘉伟耐磨材料科技有限公司 | Bimetal composite high-tenacity, high-boron and high-chrome steel hammer and preparing method thereof |
| DE102017105106A1 (en) * | 2016-03-11 | 2017-09-14 | Tiska Gmbh | COMPOSITE STEEL BAR |
| CN105908071A (en) * | 2016-05-20 | 2016-08-31 | 衡阳鸿宇机械制造有限公司 | Alloy material for manufacturing hammerhead by double-molten-metal compounding, pouring and molding sand forming and manufacturing method of double-molten-metal compounded hammerhead |
Non-Patent Citations (1)
| Title |
|---|
| 李爽等: "国内烧结机篦条的发展现状及前景", 《热加工工艺》 * |
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Application publication date: 20190524 |