CN101758173A - Pig mold of pig machine - Google Patents
Pig mold of pig machine Download PDFInfo
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- CN101758173A CN101758173A CN200910172703A CN200910172703A CN101758173A CN 101758173 A CN101758173 A CN 101758173A CN 200910172703 A CN200910172703 A CN 200910172703A CN 200910172703 A CN200910172703 A CN 200910172703A CN 101758173 A CN101758173 A CN 101758173A
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Abstract
The invention discloses a pig mold of a pig machine. The material of the pig mold is characterized in that 0.02-0.2 weight percent of La and 0.02-0.1 weight percent of Ce are added to cast steel ZG270-500, and rare-earth elements are added to further improve the mechanical property of the cast steel, and meanwhile, the corrosion resisting property and the heat resistance are also improved; a large arc molding cavity structure is adopted as a pig mold structure, wherein the wall thickness of the molding cavity of the pig mold is 30-45mm, the radius R of the large arc of the longitudinal outer wall of the molding cavity is 135-165mm, and the radius r of the large arc of the longitudinal inner wall is 90-115mm. The offset of the wall thickness of the molding cavity of the pig mold is +/-3mm (not including the edge and the position of partition ribs of the pig mold), and the molding cavity smoothly transits, which can avoid thermal stress concentration to high limit and relieve thermal fatigue breakdown. Practices prove that by adopting the pig mold of the pig machine, the service life is prolonged by more than 2 times, the frequencies of changing the pig mold during halt maintenance are obviously reduced, the comprehensive productive capacity of the pig machine is obviously improved, the operating cost of the equipment of manufacturers is greatly reduced, and the economic benefits are obviously improved. The invention has higher popularization and application values.
Description
Technical field
The present invention relates to the used a kind of pig mold of blast furnace corollary equipment pig machine.
Background technology
Pig machine is the equipment that the molten iron of blast furnace production is cast as the definite shape iron block, and pig mold accounts for 1/3rd of pig machine complete machine weight, is the attrition component of pig machine key.Pig mold is fixed on the driving-chain, about 1250 ℃ high temperature liquid iron is in molten iron trough flows into the pig mold of pig machine, molten iron is along with moving through the cooling of shower water cooled region of chain belt cast iron block in the pig mold, temperature was about 500 ℃ when iron block broke away from pig mold, and temperature was reduced to about 200 ℃ when pig mold turned back to pour point once more.As seen pig mold is in the chilling of frequent variations, anxious hot state for a long time under working condition, and condition of work is very abominable.The failure mechanism of pig mold belongs to heat fatigue and destroys.At present,, easily cause pig mold to destroy and lost efficacy, shorten the service life of pig mold greatly, directly the equipment operating cost and the economic benefit of influence use producer because of heat fatigue because that pig mold structural design and material are selected for use is unreasonable.
The cavity structure of pig mold is for falling isosceles trapezoid at present, and the deviation of wall thickness is bigger, and hypotenuse and base knuckle are R40, easily produces stress and concentrates, and easily cracks in the use; The material that pig mold adopts is common grey iron, heat-resisting cast iron etc., poor toughness, and easy fracture often will be put into reinforcing bar in pig mold, the fracture tendency of opposing casting pig and heat-resisting cast iron, and cause the casting technique complexity.
In view of the foregoing, it is very urgent to develop long-lived pig mold.
Summary of the invention
The present invention is intended to solve technical problems such as severe crack that above-mentioned pig mold in use is prone to or fracture; by innovative design to pig mold overall structure and material; prolong the service life of pig mold; reduce the pig machine fault power time, thereby improve the integrated production capacity of pig machine.
The technical scheme that the present invention takes is as follows:
According to pig mold rapid heat cycle and local applying working condition condition uneven in temperature,, think that the pig mold major cause of failure is due to the CYCLIC LOADING of thermal stress causes that the heat fatigue of pig mold destroys by analysis, judgement to pig mold fracture main cause.Should improve from material and structure two aspects.
1. material: existing material (gray iron, heat-resisting iron, spheroidal graphite cast-iron, cast steel etc.) commonly used is compared, find that cast steel characteristic is a kind of preferably material, and after in cast steel, adding rare earth element, more can further promote its performance.Comparison by analysis, it is more reasonable that the pig mold material is designed to ZG270-500 special alloy cast steel new material.The material of this kind pig mold is that the lanthanum (La) of adding gross mass 0.02%～0.2% in cast steel ZG270-500 and 0.02%～0.1% cerium (Ce) are made, the adding of these two kinds of rare earth elements has further promoted the mechanical performance of cast steel, anti-corrosion, heat resistance also increases simultaneously, can prolong the service life of pig mold effectively.
2. structure: change the former isosceles trapezoid of falling the forming cavity of orthodrome structure into, more can reduce the zone that the pig mold upper stress is concentrated and strain is concentrated effectively.Utilize finite element analysis software, optimize the structural design of pig mold, adopt the design of two circular arcs, make pig mold wall thickness uniformity, wall thickness deviation is ± 3 millimeters (except the edge of pig mold and muscle places).Reduce the thermograde that each surface of pig mold exists because of wall unevenness.The thermograde maximum often exists strain to concentrate, the generation that causes heat fatigue to destroy easily.Thermograde is controlled in the reasonable range, can effectively reduces the intensity that strain is concentrated, thereby the heat fatigue that can slow down pig mold is effectively destroyed.For this reason, with forming cavity vertically in the size Control of circular arc r at 90～115mm, vertically external arc R is controlled at 135～165mm, the two cooperation can make the pig mold heat affected zone, and wall thickness is more even everywhere, transition is more level and smooth, can avoid thermal stress to concentrate to greatest extent, slows down heat fatigue and destroys; Analyze through the finite element simulation of Temperature simultaneously, adopt reasonably forming cavity wall thickness dimension 30～45mm, the thermograde of pig mold can be controlled at the most in the reasonable range, can dwindle its inside and outside surface temperature difference everywhere during work, thereby slow down the generation that heat fatigue is destroyed effectively, the long-life of finally realizing pig mold.
The normal temperature performance of several materials commonly used of pig mold relatively sees the following form:
The present invention uses checking by the enforcement of above technical scheme and the operating mode of pig machine: improved more than the twice service life of pig mold, changes the pig mold number of times and obviously reduce.The integrated production capacity of pig machine significantly improves, and uses the equipment operating cost of producer to reduce remarkable in economical benefits greatly.
Description of drawings
Fig. 1 is the front view of this pig mold of pig machine;
Fig. 2 is the A-A view of this pig mold of pig machine;
Fig. 3 is the vertical view of this pig mold of pig machine.
The specific embodiment
Introduce embodiments of the invention below in conjunction with accompanying drawing.
Embodiment 1:
The material of pig mold is to add the lanthanum (La) of gross mass 0.06% and 0.04% cerium (Ce) in cast steel ZG270-500, and the adding of rare earth element has promoted the mechanical performance of cast steel, and pig mold is anti-corrosion, heat resistance also increases.
The structure of pig mold, through the temperature field simulation analysis, wall thickness dimension adopts 40mm, and the vertical outer wall orthodrome of forming cavity R is 150mm, and vertically inwall orthodrome r is 110mm.The wall thickness deviation of pig mold forming cavity is ± 3 millimeters (except the edge of pig mold and muscle places).The thermograde of pig mold can be controlled at the most in the reasonable range, can dwindle its inside and outside surface temperature difference everywhere during work, thereby slow down effectively the generation that heat fatigue is destroyed, the long-life of finally having realized pig mold.
Embodiment 2:
The material of pig mold is to add the lanthanum (La) of gross mass 0.12% and 0.06% cerium (Ce) in cast steel ZG270-500, and the mechanical performance of pig mold is improved significantly, and anti-corrosion, heat resistance also increases.
The structure of pig mold, through the temperature field simulation analysis, wall thickness dimension adopts 38mm, and the vertical outer wall orthodrome of forming cavity R is 117mm, and vertically inwall orthodrome r is 79mm.The wall thickness deviation of pig mold forming cavity is ± 3 millimeters (except the edge of pig mold and muscle places).The temperature difference on its inside and outside surface obviously reduces during pig mold work, has slowed down the generation that heat fatigue is destroyed, the long-life of having realized pig mold.
Claims (4)
1. pig mold of pig machine is characterized in that: it is to add the orthodrome forming cavity pig mold that rare earth element is made in ZG270-500.
2. pig mold of pig machine according to claim 1 is characterized in that: described pig mold material is to add the rare-earth elements La of gross mass 0.02%～0.2% and 0.02%～0.1% rare earth element ce among the ZG270-500.
3. pig mold of pig machine according to claim 1 is characterized in that: described pig mold forming cavity wall thickness is 30～45mm, and the vertical outer wall orthodrome of forming cavity R is 135～165mm, and vertically inwall orthodrome r is 90～115mm.
4. pig mold of pig machine according to claim 1 is characterized in that: the wall thickness deviation of described pig mold forming cavity is ± 3 millimeters (except the edge of pig mold and muscle place).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101727031A CN101758173B (en) | 2009-11-25 | 2009-11-25 | Pig mold of pig machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101727031A CN101758173B (en) | 2009-11-25 | 2009-11-25 | Pig mold of pig machine |
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| Publication Number | Publication Date |
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| CN101758173A true CN101758173A (en) | 2010-06-30 |
| CN101758173B CN101758173B (en) | 2011-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101727031A Active CN101758173B (en) | 2009-11-25 | 2009-11-25 | Pig mold of pig machine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554144A (en) * | 2012-03-07 | 2012-07-11 | 四川川投峨眉铁合金（集团）有限责任公司 | Tiled butting type ingot mold and casting method thereof |
| CN102554147A (en) * | 2012-03-07 | 2012-07-11 | 四川川投峨眉铁合金（集团）有限责任公司 | Combined type ingot mould and casting method thereof |
| CN103706768A (en) * | 2013-12-20 | 2014-04-09 | 世林（漯河）冶金设备有限公司 | Casting machine used for casting special materials |
| CN103706761A (en) * | 2013-12-20 | 2014-04-09 | 世林（漯河）冶金设备有限公司 | Casting die of casting machine for alloy materials or non-metallic materials |
| CN103769552A (en) * | 2014-01-06 | 2014-05-07 | 世林（漯河）冶金设备有限公司 | Long-service-life, safe and reliable forging cast iron die for pig casting machine and manufacturing method thereof |
| CN112792150A (en) * | 2020-12-23 | 2021-05-14 | 东北轻合金有限责任公司 | Extrusion method of 7150 alloy profile |
| CN112916812A (en) * | 2021-01-29 | 2021-06-08 | 焦作市迈科冶金机械工程技术咨询有限公司 | Ultra-thick rail type iron alloy molten iron casting equipment |
-
2009
- 2009-11-25 CN CN2009101727031A patent/CN101758173B/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554144A (en) * | 2012-03-07 | 2012-07-11 | 四川川投峨眉铁合金（集团）有限责任公司 | Tiled butting type ingot mold and casting method thereof |
| CN102554147A (en) * | 2012-03-07 | 2012-07-11 | 四川川投峨眉铁合金（集团）有限责任公司 | Combined type ingot mould and casting method thereof |
| CN102554144B (en) * | 2012-03-07 | 2013-11-13 | 四川川投峨眉铁合金（集团）有限责任公司 | Tiled butting type ingot mold and casting method thereof |
| CN102554147B (en) * | 2012-03-07 | 2013-11-13 | 四川川投峨眉铁合金（集团）有限责任公司 | Combined type ingot mould and casting method thereof |
| CN103706768A (en) * | 2013-12-20 | 2014-04-09 | 世林（漯河）冶金设备有限公司 | Casting machine used for casting special materials |
| CN103706761A (en) * | 2013-12-20 | 2014-04-09 | 世林（漯河）冶金设备有限公司 | Casting die of casting machine for alloy materials or non-metallic materials |
| CN103769552A (en) * | 2014-01-06 | 2014-05-07 | 世林（漯河）冶金设备有限公司 | Long-service-life, safe and reliable forging cast iron die for pig casting machine and manufacturing method thereof |
| CN103769552B (en) * | 2014-01-06 | 2016-08-10 | 世林（漯河）冶金设备有限公司 | Long-life safety reliable for pig machine forges pig mold and manufacture method thereof |
| CN112792150A (en) * | 2020-12-23 | 2021-05-14 | 东北轻合金有限责任公司 | Extrusion method of 7150 alloy profile |
| CN112792150B (en) * | 2020-12-23 | 2023-04-07 | 东北轻合金有限责任公司 | Extrusion method of 7150 alloy profile |
| CN112916812A (en) * | 2021-01-29 | 2021-06-08 | 焦作市迈科冶金机械工程技术咨询有限公司 | Ultra-thick rail type iron alloy molten iron casting equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101758173B (en) | 2011-07-13 |
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