CN104611634A - Grate bar material of trolley of sinter machine and production method of grate bar material - Google Patents

Grate bar material of trolley of sinter machine and production method of grate bar material Download PDF

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Publication number
CN104611634A
CN104611634A CN201410846594.8A CN201410846594A CN104611634A CN 104611634 A CN104611634 A CN 104611634A CN 201410846594 A CN201410846594 A CN 201410846594A CN 104611634 A CN104611634 A CN 104611634A
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China
Prior art keywords
grate bar
rare earth
bar material
melting
sintering machine
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CN201410846594.8A
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杨楚谋
王群
贾伟峰
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TAOJIANG XINXING FITTINGS CO Ltd
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TAOJIANG XINXING FITTINGS CO Ltd
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Priority to CN201410846594.8A priority Critical patent/CN104611634A/en
Publication of CN104611634A publication Critical patent/CN104611634A/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B22C9/04—Use of lost patterns
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention discloses a grate bar material of a trolley of a sinter machine. The grate bar material is good in usage effect and low in production cost. The grate bar material is characterized by comprising the following chemical components in percentage by mass: 1-1.5% of C, 1.0-2.0% of Si, 16-20% of Cr, 3.0-7.0% of Al, 0.05-0.15% of rare-earth elements, 0.5-1.0% of Mn, less than 0.02% of S, less than 0.05% of P and the balance of Fe, and the sum of all the components is 100%. The production method comprises the steps of modelling, melting and casting. The service life of grate bars produced by the production method disclosed by the invention is equal to or greater than 12 months, the hardness HBS is equal to or greater than 282, and the fracture rate (when the grate bars drop from a 2-meter-high place) is reduced to 0 from about 5% in orignal. The dosage of precious metal such as chromium and nickel is substantially reduced, and the production technology is simplified, so that the direct production cost is reduced by over 20% than that of an original technology; after about 200 tons of the grate bars are produced and used by users, the response is very good, the economic benefits of enterprises are improved, and the market competitiveness is enhanced.

Description

Grate bar of sintering machine trolley material and production method
Technical field
The present invention relates to a kind of alloy and production method thereof, specifically a kind of grate bar of sintering machine trolley material and production method.
Background technology
Grid section is the key fitment on sintering pallet, and the effect of grid section forms channel space with trolley breast plate, holds, carries mineral aggregate.Grid section working environment is severe, is subject to oxidation, wearing and tearing under the hot conditions of 800 DEG C ~ 1000 DEG C, in the processes such as heating, cooling, shock after iterative cycles gradually because of oxidation, wearing and tearing, be out of shape and cause destruction.Its Slope protection is complicated, belongs to consumable accessory, needs a large amount of time and human and material resources during replacing, and the length in grid section work-ing life directly has influence on production operational availability and production cost.
Grid section successively experienced by the process of graphitic cast iron grid section, heat-proof nodular cast iron grid section, high-chromium alloy grid section, multi-element alloyed high-chromium alloy grid section, high temperature steel grid section, in recent years, domestic fire grate bar material is generally towards high-chromium alloy future development, and Be very effective.Although obtain large increase on service life, the level even reaching imported grate bars had, production cost is always all higher relatively.
Summary of the invention
The object of this invention is to provide a kind of result of use good, the grate bar of sintering machine trolley material that production cost is low and production method.
The present invention adopts following technical scheme to realize its goal of the invention, a kind of grate bar of sintering machine trolley material, with element mass percent, its chemical composition comprises ﹪, Al:3.0 ﹪ ~ 7.0, ﹪, Cr:16 ﹪ ~ 20, ﹪, Si:1.0 ﹪ ~ 2.0, C:1 ﹪ ~ 1.5 ﹪, rare earth element: 0.05 ﹪, Mn:0.5 ﹪ ~ 1.0, ﹪ ~ 0.15 ﹪, S < 0.02 ﹪, P < 0.05, surplus is Fe, and each component sum is 100 ﹪.
The present invention is with element mass percent, its chemical composition more preferably comprises ﹪, Al:3.0 ﹪ ~ 4.5, ﹪, Cr:16 ﹪ ~ 18, ﹪, Si:1.6 ﹪ ~ 2.0, C:1 ﹪ ~ 1.3 ﹪, rare earth element: 0.05 ﹪, Mn:0.6 ﹪ ~ 0.9, ﹪ ~ 0.15 ﹪, S < 0.02 ﹪, P < 0.05, surplus is Fe, and each component sum is 100 ﹪.
The present invention is with element mass percent, its chemical composition is selected and comprise C:1.1 ﹪, Si:1.7 ﹪, Cr:17 ﹪, Al:3.0 ﹪, rare earth element most: 0.10 ﹪, Mn:0.8 ﹪, S < 0.02 ﹪, P < 0.05, surplus is Fe, and each component sum is 100 ﹪.
A kind of grate bar of sintering machine trolley material producing method, it comprises the following steps:
(1) moulding: adopt evaporative pattern production technique, shaping with EPS foaming molding, moulding selects 30 order ~ 50 orders to clean sand, puts into sandbox, add sand, vibration ramming by after the model group case after hanging painting, drying;
(2) melting: adopt medium-frequency induction furnace melting, steel scrap, the pig iron are added medium-frequency induction furnace in proportion and carries out melting, to skim after metal charge is melting down sampling analysis, according to the analytical results of spectrum analyzer, metal alloy is added in medium-frequency induction furnace, carry out composition adjustment, when bonded hard ferrite magnet reaches 1520 DEG C ~ 1600 DEG C, add rare earth alloy and carry out operation of tapping a blast furnace;
(3) pour into a mould: during cast, temperature controls at 1470 DEG C ~ 1490 DEG C, vacuum degree control is at-0.03Mpa ~-0.06Mpa, and after cast, the time controling of falling case is at >=6h.
The present invention step (3) in, follow first slow → rear fast → finally slow principle during cast, first seal off gating system with shallow bid molten iron stream when namely starting to pour into a mould, after passage is opened, want Quick pouring, being involved in of minimizing air; When sound of bleeding reduce, disappear time to slow down pouring speed, strengthen feeding capacity and also prevent molten metal from overflowing, cause and waste and security incident.
Owing to adopting technique scheme, the present invention achieves goal of the invention preferably, the grid section of production work-ing life >=12 months, hardness HBS >=282, the rate that fractures (2 meters high fall) is reduced to zero by about 5 original ﹪; Owing to significantly decreasing the consumption as the noble metal such as chromium, nickel, and simplify production technique, its direct production cost have dropped 20 more than ﹪ than former technique, user is handed over to use through producing nearly 200 tons of grid sections, reaction is good, improves the economic benefit of enterprise, enhances the market competitiveness.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1:
A kind of grate bar of sintering machine trolley material, with element mass percent, its chemical composition comprises ﹪, Al:3.0 ﹪ ~ 7.0, ﹪, Cr:16 ﹪ ~ 20, ﹪, Si:1.0 ﹪ ~ 2.0, C:1 ﹪ ~ 1.5 ﹪, rare earth element: 0.05 ﹪, Mn:0.5 ﹪ ~ 1.0, ﹪ ~ 0.15 ﹪, S < 0.02 ﹪, P < 0.05, surplus is Fe, and each component sum is 100 ﹪.
Grid section failure cause analysis: one is the high temperature oxidation that grid section is subject to air at work, comes off after surface oxidation, makes excessive clearance between grid section, when losing efficacy more than grid section during 10 ㎜ in gap.Two is that sinter machine operationally adopts when working without grate-layer material, and at high temperature have low melting point and be attached on grid section, cause gap smaller between grid section, ventilate and be deteriorated, grid section lost efficacy.Three is under high temperature and stress, creep occurs for a long time when grid section, and when exceeding certain size, grid section lost efficacy.Four is grid section poor toughness, and transporting, install, rupture when being subject to external force collision, grid section lost efficacy.Five is that grid section is subject to the wearing and tearing of agglomerate and lost efficacy.According to statistics, the main failure forms of grid section is ablation and fractures, and sum of the two accounts for about 80 ﹪ of the sum that lost efficacy.Therefore, when casting Technology Design, first should be in optimized selection from material composition, to improve its intensity and corrosion resistance.
The determination of principal element:
C:C element is the element had the greatest impact to hardness, C is the principal element generating eutectic carbides, eutectic carbides plays Main Function in wear resistance, C content is higher, and eutectic carbides quantity is more, more favourable to wear resistance, but simultaneously to mechanical property, especially impelling strength has a negative impact, and therefore, C content is comparatively suitable at 1 ﹪ ~ 1.5 ﹪.
Table 1: the impact of carbon content On Impact Toughness and hardness
C﹪ 0.8 1.0 1.2 1.4 1.6
ak J/cm 2 10.2 8.4 7.9 6.7 6.0
HRC 47.8 50.6 51.2 52.5 52.3
Si:Si is non-carbide formers, and it significantly reduces perviousness on the one hand, and likely occur iron element phase, too much Si will make toughness decline on the other hand, and occur peeling phenomenon in wear process.To being oxidized restraining effect, Si (is greater than 900 DEG C) when temperature is larger and could forms fine and close zone of oxidation, Si suitable in grid section can improve antioxidant property to a certain extent, but along with the increase matrix hardness of Si content increases thereupon, and fragility also increases thereupon, for taking into account impelling strength and oxidation-resistance, Si content controls at 1.0 ﹪ ~ 2.0 ﹪.
Cr: why high-chromium alloy cast-iron has higher resistance toheat, mainly Cr add the Cr making alloy extexine generate one deck densification under high temperature action 2o 3, alloy oxidation process is stoped to turn to internal oxidation by external oxidation, under the high temperature conditions, due to the effect by stress etc., oxide film and layer crack, crackle is that internal oxidation provides air supply channel, high-chromium alloy cast-iron itself has repair ability to crackle, Cr content is higher, repair ability is stronger, but Cr content is separated out more than there being frangible compounds during 30 ﹪, destroy toughness of material, in addition, Cr too high levels, melting difficulty, have sub-fraction fritter ferrochrome to float over iron liquid surface to be difficult to melt, castability worsens, cost increases, consider, Cr is controlled at 16 ﹪ ~ 20 ﹪.
Table 2: chromium content is on the impact of performance and oxidation rate
Table 3: chromium content is on the impact of tempered-hardness
Cr content ﹪ 14～17 17～19 20～25 ＞25
As cast condition 35.6 39.8 43.4 46.2
550℃×220h 28.9 33.6 37.0 40.3
250℃×220h 26.8 31.6 34.8 37.9
Al: refractory alloy at high temperature collapse mode has oxidation and growth distortion two kinds, under high temperature, Al can at metallic surface rapid oxidation, significantly improve high-temperature oxidation resistance, Al can also make α → γ transformation temperature improve simultaneously, and pearlite decomposition temperature can be improved, temperature perlite, makes alloy have the ability of high temperature resistance growth.By adding Al element, the problem of Alloy Anti oxidisability deficiency can be made up further, rate of oxidation is obviously reduced.But Al add-on is many, castability worsens, and inclusion increases, therefore Al selects to control at 3.0 ﹪ ~ 7.0 ﹪.
Rare earth element: its effect of rare earth is deoxidation and desulfuration, thus suppress inclusion in the segregation of crystal boundary, the growth of carbide is suppressed.Because Rare-Earth Element Chemistry character is very active, preferential sulphur, oxygen, nitrogen can generate rare earth compound, under proper condition floating in slag, inclusion be reduced, can refinement matrix, purification phase interface, raising phase boundary resistance to corrosion.Through the contrast of spiral-line specimen length, 1520 DEG C ~ 1550 DEG C time, add rare earth can improve spiral-line specimen length 55.6 ﹪, when 1480 DEG C ~ 1550 DEG C cast, 52.0 ﹪ can be improved, improve the mobility of molten steel.
Rare earth add the shape that also can change crystal boundary inclusion, make its subglobular, extend the stress rupture time at double, significantly reduce creep rate, simultaneously also can improve Cr 2o 3layer and the adhesivity of matrix, suppress Cr 2o 3the decline of layer, reduces constant temperature oxidation.Rare earth can also alleviate coming off of oxide film to a certain extent.But as excessive in added, the amount of inclusions will be made to increase, reduce alloy ductility, and cost is increased, therefore control its rare-earth residual amount 0.05 ﹪ ~ 0.15 ﹪.
Table 4: content of rare earth is on the impact of oxidation rate
RE﹪ 0.01 0.03
Oxidation weight gain/g.m ～2.h ～1(1000℃×100h) 0.29 1.08
Mn:Mn has deoxidation, separation of flow effect, effectively in eliminating the non-metallic inclusion in molten metal, the form improving inclusion and issue, thus improves matrix strength and toughness, but unfavorable on the impact of its oxidation-resistance, therefore selects Mn content to be 0.5 ﹪ ~ 1.0 ﹪
S, P are harmful element, especially larger to heat-stable material harm, strictly must control, determine that its content is S < 0.02 ﹪, P < 0.05.
The present invention is with element mass percent, its chemical composition more preferably comprises ﹪, Al:3.0 ﹪ ~ 4.5, ﹪, Cr:16 ﹪ ~ 18, ﹪, Si:1.6 ﹪ ~ 2.0, C:1 ﹪ ~ 1.3 ﹪, rare earth element: 0.05 ﹪, Mn:0.6 ﹪ ~ 0.9, ﹪ ~ 0.15 ﹪, S < 0.02 ﹪, P < 0.05, surplus is Fe, and each component sum is 100 ﹪.
The present invention is with element mass percent, its chemical composition is selected and comprise C:1.1 ﹪, Si:1.7 ﹪, Cr:17 ﹪, Al:3.0 ﹪, rare earth element most: 0.10 ﹪, Mn:0.8 ﹪, S < 0.02 ﹪, P < 0.05, surplus is Fe, and each component sum is 100 ﹪.
The present embodiment selects chemical composition to comprise C:1.1 ﹪, Si:1.7 ﹪, Cr:17 ﹪, Al:3.0 ﹪, rare earth element: 0.10 ﹪, Mn:0.8 ﹪, S < 0.02 ﹪, P < 0.05, surplus is Fe, and each component sum is 100 ﹪.
A kind of grate bar of sintering machine trolley material producing method, it comprises the following steps:
(1) moulding: adopt evaporative pattern production technique, shaping with EPS foaming molding, moulding selects 30 order ~ 50 orders to clean sand, puts into sandbox, add sand, vibration ramming by after the model group case after hanging painting, drying;
The present embodiment moulding selects 40 orders to be the scouring sand of Main Components, during moulding, sand temperature control is at≤75 DEG C, the model be up to the standards adopts water-based paint to be coated with, coat-thickness controls 0.5 ㎜ ~ 0.7 ㎜ (the present embodiment is 0.6 ㎜), putting of bake process attention model, during model group case, cemented side seam alcohol-base paint carries out benefit brush.
(2) melting: adopt medium-frequency induction furnace melting, steel scrap, the pig iron are added medium-frequency induction furnace in proportion and carries out melting, to skim after metal charge is melting down sampling analysis, according to the analytical results of spectrum analyzer, metal alloy is added in medium-frequency induction furnace, carry out composition adjustment, when bonded hard ferrite magnet reaches 1520 DEG C ~ 1600 DEG C, add rare earth alloy and carry out operation of tapping a blast furnace;
Medium frequency induction melting furnace energising 4min ~ 8min, starts the power first reaching about 60 ﹪, after rush of current stops, gradually power is increased to maximum value.
Along with crucible bottom is load melting, note at any time smashing material, prevent " bridging ", reduce iron liquid oxidation, and continue to add furnace charge.
When the furnace charge of 95 ﹪ melts complete, get iron liquid sample and carry out spectroscopic analysis, and the furnace charge of all the other 5 ﹪ and metal alloy material are added in stove.Whole furnace charge molten finish after, reduce power to 40 ﹪ ~ 60 ﹪, turndown is skimmed.
When temperature reaches 1520 DEG C ~ 1600 DEG C (the present embodiment is 1580 DEG C), add aluminium row and carry out deoxidation, meanwhile, in the hot metal ladle through preheating, add rare earth alloy, power failure is tapped a blast furnace.
(3) pour into a mould: during cast, temperature controls at 1470 DEG C ~ 1490 DEG C, vacuum degree control is at-0.03Mpa ~-0.06Mpa, and after cast, the time controling of falling case is at >=6h.
Before cast: check sandbox vacuum, determine No leakage, vacuum value is stablized, and vacuum tightness is-0.05Mpa, carries out pouring operation after reaching processing requirement.
Cast: through deoxidation, skim after iron liquid leave standstill after 2 minutes and pour into a mould, during cast, temperature is 1480 DEG C, and the whole duration of pouring of every iron clad water controlled within 8 minutes.
Step (3) in, follow first slow → rear fast → finally slow principle during cast, first seal off gating system with shallow bid molten iron stream when namely starting to pour into a mould, after passage is opened, want Quick pouring, being involved in of minimizing air; When sound of bleeding reduce, disappear time to slow down pouring speed, strengthen feeding capacity and also prevent molten metal from overflowing, cause and waste and security incident.
After cast: continue to keep vacuum after 5 minutes ~ 10 minutes (the present embodiment is 8 minutes), exit or close vacuum.
Table 5: the grid section Main Numerical that the present invention and prior art are produced contrasts
Note: the rate of fractureing refers to that grid section is the level of state at 2 meters high and freely falls the fracture ratio on normal concrete ground.
The present embodiment prepare grid section work-ing life >=12 months, hardness HBS >=282, the rate that fractures (2 meters high fall) is reduced to zero by original about 5 ﹪; Owing to significantly decreasing the consumption as the noble metal such as chromium, nickel, and simplify production technique, its direct production cost have dropped 20 more than ﹪ than former technique, uses through user, and reaction is good, improves the economic benefit of enterprise, enhances the market competitiveness.
Embodiment 2:
The present embodiment selects chemical composition to comprise C:1.3 ﹪, Si:1.2 ﹪, Cr:17 ﹪, Al:6.0 ﹪, rare earth element: 0.08 ﹪, Mn:0.9 ﹪, S < 0.02 ﹪, P < 0.05, surplus is Fe, and each component sum is 100 ﹪.
Remaining with embodiment 1.
Embodiment 3:
The present embodiment selects chemical composition to comprise C:1.1 ﹪, Si:1.8 ﹪, Cr:19 ﹪, Al:4.5 ﹪, rare earth element: 0.15 ﹪, Mn:0.6 ﹪, S < 0.02 ﹪, P < 0.05, surplus is Fe, and each component sum is 100 ﹪.
Remaining with embodiment 1.
Embodiment 4:
The present embodiment selects chemical composition to comprise C:1.4 ﹪, Si:1.7 ﹪, Cr:20 ﹪, Al:5.3 ﹪, rare earth element: 0.1 ﹪, Mn:0.8 ﹪, S < 0.02 ﹪, P < 0.05, surplus is Fe, and each component sum is 100 ﹪.
Remaining with embodiment 1.

Claims (5)

1. a grate bar of sintering machine trolley material, it is characterized in that with element mass percent, its chemical composition comprises ﹪, Al:3.0 ﹪ ~ 7.0, ﹪, Cr:16 ﹪ ~ 20, ﹪, Si:1.0 ﹪ ~ 2.0, C:1 ﹪ ~ 1.5 ﹪, rare earth element: 0.05 ﹪, Mn:0.5 ﹪ ~ 1.0, ﹪ ~ 0.15 ﹪, S < 0.02 ﹪, P < 0.05, surplus is Fe, and each component sum is 100 ﹪.
2. grate bar of sintering machine trolley material according to claim 1, it is characterized in that with element mass percent, its chemical composition more preferably comprises ﹪, Al:3.0 ﹪ ~ 4.5, ﹪, Cr:16 ﹪ ~ 18, ﹪, Si:1.6 ﹪ ~ 2.0, C:1 ﹪ ~ 1.3 ﹪, rare earth element: 0.05 ﹪, Mn:0.6 ﹪ ~ 0.9, ﹪ ~ 0.15 ﹪, S < 0.02 ﹪, P < 0.05, surplus is Fe, and each component sum is 100 ﹪.
3. grate bar of sintering machine trolley material according to claim 1, it is characterized in that with element mass percent, its chemical composition is selected and comprise C:1.1 ﹪, Si:1.7 ﹪, Cr:17 ﹪, Al:3.0 ﹪, rare earth element most: 0.10 ﹪, Mn:0.8 ﹪, S < 0.02 ﹪, P < 0.05, surplus is Fe, and each component sum is 100 ﹪.
4. a grate bar of sintering machine trolley material producing method, is characterized in that it comprises the following steps:
(1) moulding: adopt evaporative pattern production technique, shaping with EPS foaming molding, moulding selects 30 order ~ 50 orders to clean sand, puts into sandbox, add sand, vibration ramming by after the model group case after hanging painting, drying;
(2) melting: adopt medium-frequency induction furnace melting, steel scrap, the pig iron are added medium-frequency induction furnace in proportion and carries out melting, to skim after metal charge is melting down sampling analysis, according to the analytical results of spectrum analyzer, metal alloy is added in medium-frequency induction furnace, carry out composition adjustment, when bonded hard ferrite magnet reaches 1520 DEG C ~ 1600 DEG C, add rare earth alloy and carry out operation of tapping a blast furnace;
(3) pour into a mould: during cast, temperature controls at 1470 DEG C ~ 1490 DEG C, vacuum degree control is at-0.03Mpa ~-0.06Mpa, and after cast, the time controling of falling case is at >=6h.
5. grate bar of sintering machine trolley material producing method according to claim 1, it is characterized in that step (3) in, first slow → rear fast → finally slow principle is followed during cast, first gating system is sealed off with shallow bid molten iron stream when namely starting to pour into a mould, after passage is opened, want Quick pouring, reduce being involved in of air; When sound of bleeding reduce, disappear time to slow down pouring speed, strengthen feeding capacity and also prevent molten metal from overflowing, cause and waste and security incident.
CN201410846594.8A 2014-12-31 2014-12-31 Grate bar material of trolley of sinter machine and production method of grate bar material Pending CN104611634A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109516819A (en) * 2018-12-10 2019-03-26 河北利镔通用设备有限公司 Grid section of refractory coating and preparation method thereof is fired on a kind of refractory coating, surface
CN109530618A (en) * 2019-01-08 2019-03-29 长沙威尔保新材料有限公司 A kind of preparation method of the fire grate bar on sintering pallet

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1037741A (en) * 1988-05-13 1989-12-06 山东工业大学 The heat-resisting chromium steel of a kind of stove
CN101368248A (en) * 2007-08-15 2009-02-18 北京北科德瑞冶金工程技术有限公司 Heat-resisting alloy steel for grate plate and method of producing the same
CN101380663A (en) * 2008-08-19 2009-03-11 侯马市模范机械制造有限公司 Precision casting method of lost foam hollow-shell
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1037741A (en) * 1988-05-13 1989-12-06 山东工业大学 The heat-resisting chromium steel of a kind of stove
CN101368248A (en) * 2007-08-15 2009-02-18 北京北科德瑞冶金工程技术有限公司 Heat-resisting alloy steel for grate plate and method of producing the same
CN101380663A (en) * 2008-08-19 2009-03-11 侯马市模范机械制造有限公司 Precision casting method of lost foam hollow-shell
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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109516819A (en) * 2018-12-10 2019-03-26 河北利镔通用设备有限公司 Grid section of refractory coating and preparation method thereof is fired on a kind of refractory coating, surface
CN109530618A (en) * 2019-01-08 2019-03-29 长沙威尔保新材料有限公司 A kind of preparation method of the fire grate bar on sintering pallet
WO2020143107A1 (en) * 2019-01-08 2020-07-16 长沙威尔保新材料有限公司 Preparation method for grate bar for sintering machine trolley

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