CN105132831A - Iron-based powder metallurgy self-lubricating material and heating furnace charge pad sliding plate using same - Google Patents
Iron-based powder metallurgy self-lubricating material and heating furnace charge pad sliding plate using same Download PDFInfo
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- CN105132831A CN105132831A CN201510574832.9A CN201510574832A CN105132831A CN 105132831 A CN105132831 A CN 105132831A CN 201510574832 A CN201510574832 A CN 201510574832A CN 105132831 A CN105132831 A CN 105132831A
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Abstract
The invention discloses an iron-based powder metallurgy self-lubricating material which comprises the following components in percentage by mass: 10-12.4 percent of manganese, 14.12-17.71 percent of sulfur, 7.82-9.15 percent of chromium, 2.91-3.84 percent of nickel, 0.91-3.04 percent of molybdenum, 2.1-5.1 percent of graphite, 1.8-2.36 percent of oxygen and the balance of iron. The invention further discloses a preparation method of the iron-based powder metallurgy self-lubricating material and a heating furnace charge pad sliding plate using the material. The iron-based powder metallurgy self-lubricating material can ensure the self-lubricating performance at 500-650 DEG C, has high strength, moderate hardness and toughness and a low expansion coefficient, can meet the requirements of preset working conditions, and is prolonged in service life and reduced in production cost.
Description
Technical field
The present invention relates to the process furnace backing strap slide plate of a kind of ferrous based powder metallurgical self-lubricating material and preparation method and this material of use.
Background technology
At present, the aluminum slab process furnace of aluminium processing industry is that backing strap slide block moves and carries aluminum slab on guide rail by the backing strap slide block be supported on guide rail to complete transport, and they pass through and are heated to rolling temperature about 650 DEG C in process furnace; Existing backing strap slide plate, comprises slide plate chair and several inserts, and slide plate chair is provided with the open holes of more than one notch cuttype and several insert hole, and be provided with a cylindrical insert in each insert hole, cylindrical insert and insert hole are shrink-fit; During use, aluminum slab is placed on several backing strap slide plate, its inserts and guide rail contact; Therefore inserts requires to have certain self lubricity, be convenient to travelling workpiece in stove, have certain intensity and toughness, be convenient to load-bearing, wear-resisting and bear thermal shocking, its hardness again can not be too high simultaneously, as higher than or close to the hardness of guide rail, way rub is very fast, as high and affect production in changed guide rail cost, and its coefficient of expansion is less than normal, in order to avoid burst slide plate chair when being heated, affect its work-ing life; And existing ferrous based powder metallurgical self-lubricating material, as kept the self lubricity of its hot stage, its hardness, the coefficient of expansion are all higher, toughness is also poor, above-mentioned requirements cannot be met simultaneously, easily cause guide rail or backing strap slider damage, increase cost and affect production.
Summary of the invention
The object of the invention is for prior art above shortcomings, the process furnace backing strap slide plate of a kind of ferrous based powder metallurgical self-lubricating material and preparation method and this material of use is provided, it can ensure its self lubricity between 500-650 DEG C, and there is higher intensity, moderate hardness and toughness and the lower coefficient of expansion, the needs of default operating mode can be met, and increase the service life, reduce production cost.
For achieving the above object, ferrous based powder metallurgical self-lubricating material of the present invention, is characterized in that comprising following component: manganese 10-12.4%; Sulphur 14.12-17.71%; Chromium 7.82-9.15%; Nickel 2.91-3.84%; Molybdenum 0.91-3.04%; Graphite 2.1-5.1%, oxygen 1.8-2.36%, all the other are iron, are more than mass percent;
The preparation method of above-mentioned ferrous based powder metallurgical self-lubricating material, it is characterized in that comprising the following steps: A) batch mixing: will the sulfuration manganese powder of component described in claim 1, sulfuration iron powder, Z 250 powder, chromium powder, nickel powder, molybdenum powder, Graphite Powder 99 and iron powder Homogeneous phase mixing 4-6 hour be comprised, wherein the granularity of graphite is 50-100 order, the granularity of Z 250 and iron powder is 100-200 order, the granularity of nickel powder is 200-250 order, and the granularity of all the other powders is 250-300 order; B) suppress: loaded in forming mould by powder after mixing and suppress, pressure is 35-40t, dwell time 1-2 minute, obtains blank; C) sinter: blank is adopted gas shield sintering at sintering oven, sintering temperature 900-1000 DEG C, insulation 45-90 minute; D) squeezing shaping: sintered products is extruded by mould, pressure is 40-45t, dwell time 0.5-1 minute, makes product more fine and close and controls physical dimension, forming smooth protective membrane on surface; E) flood: grease product being put into the molybdenumdisulphide of 190-210 DEG C floods, and absorbs certain grease.
The present invention generates molybdenumdisulphide by sintering, and adsorb molybdenumdisulphide grease by dipping by the micropore in product after sintering, molybdenumdisulphide has good lubricity, the self lubricity of its hot stage can be ensured, molybdenum, the hard wild phase that chromium and nickel are formed is uniformly distributed with iron-based, jointly can improve the intensity of matrix, wear resisting property and corrosion resistance nature, and the impact reduced matrix toughness, nickel also has the little characteristic of the coefficient of expansion, nickel and manganese can strengthen matrix toughness, bear thermal shocking, and hardness is relatively low, avoid in use cracking, increase the service life, reduce production cost,
As a further improvement on the present invention, the shielding gas used in preparation method is nitrogen or ammonia;
As a further improvement on the present invention, in step e) after again product is put into slushing oil and floods; Can corrosion be avoided, increase the service life;
The present invention uses the process furnace backing strap slide plate of above-mentioned ferrous based powder metallurgical self-lubricating material, comprise slide plate chair and several inserts, slide plate chair is provided with the open holes of more than one notch cuttype and several insert hole, each inserts is located in respective insert hole, it is characterized in that each inserts all adopts ferrous based powder metallurgical self-lubricating material according to claim 1, inserts excircle is provided with the raised line of several axis, raised line and insert hole are shrink-fit, inserts excircle and insert hole are running fit, and the lower surface of slide plate chair is higher than the lower surface of inserts.
Each inserts of process furnace backing strap slide plate is shrink-fit by the raised line of its several axis and insert hole, inserts excircle and insert hole are running fit, not only be convenient to processing, only need lower pressure to be pressed in insert hole by inserts, during use, deformation space is there is between inserts and slide plate chair, effectively can eliminate thermal stresses, add that its coefficient of expansion is less than normal, can avoid bursting slide plate chair, not easily crack, increase the service life; This inserts is self lubricity material, its lower surface and guide rail contact, can travelling workpiece easily, and its hardness, lower than guide rail, can reduce the wearing and tearing of guide rail; Have higher intensity, moderate hardness and toughness, be convenient to load-bearing, wear-resisting and bear thermal shocking, self not easily cracks simultaneously.
In sum, the present invention can ensure its self lubricity between 500-650 DEG C, and has higher intensity, moderate hardness and toughness and the lower coefficient of expansion, can meet the needs of default operating mode, and increase the service life, and reduces production cost.
Accompanying drawing explanation
Fig. 1 is the front view of the process furnace backing strap slide plate using ferrous based powder metallurgical self-lubricating material of the present invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
Fig. 4 is the front view of each inserts in Fig. 1.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is further detailed explanation.
Embodiment one
A kind of ferrous based powder metallurgical self-lubricating material, comprises following component: manganese 10%; Sulphur 17.71%; Chromium 8.65%; Nickel 2.91%; Molybdenum 3.04%; Graphite 3.61%, oxygen 1.8%, all the other are iron, are more than mass percent;
The preparation method of above-mentioned ferrous based powder metallurgical self-lubricating material, comprise the following steps: A) batch mixing: will the sulfuration manganese powder of said components, sulfuration iron powder, Z 250 powder, chromium powder, nickel powder, molybdenum powder, Graphite Powder 99 and iron powder Homogeneous phase mixing 4-6 hour in ball mill be comprised, wherein the granularity of graphite is 50 orders, the granularity of Z 250 and iron powder is 200 orders, the granularity of nickel powder is 225 orders, and the granularity of all the other powders is 250 orders; B) suppress: loaded in forming mould by powder after mixing and suppress, pressure is 35t, 2 minutes dwell times, obtains blank; C) sinter: blank is adopted nitrogen protective sintering at sintering oven, sintering temperature 900 DEG C, be incubated 90 minutes; D) squeezing shaping: sintered products is extruded by mould, pressure is 40t, 1 minute dwell time, makes product more fine and close and controls physical dimension, forming smooth protective membrane on surface; E) flood: grease product first being put into the molybdenumdisulphide of 190 DEG C floods, and absorbs certain grease, then slushing oil will be put into flood.
Embodiment two
A kind of ferrous based powder metallurgical self-lubricating material, comprises following component: manganese 12.4%; Sulphur 16.31%; Chromium 7.82%; Nickel 3.84%; Molybdenum 2.06%; Graphite 2.1%, oxygen 2.36%, all the other are iron, are more than mass percent;
The preparation method of above-mentioned ferrous based powder metallurgical self-lubricating material, comprise the following steps: A) batch mixing: will the sulfuration manganese powder of said components, sulfuration iron powder, Z 250 powder, chromium powder, nickel powder, molybdenum powder, Graphite Powder 99 and iron powder Homogeneous phase mixing 4-6 hour in ball mill be comprised, wherein the granularity of graphite is 100 orders, the granularity of Z 250 and iron powder is 100 orders, the granularity of nickel powder is 200 orders, and the granularity of all the other powders is 300 orders; B) suppress: loaded in forming mould by powder after mixing and suppress, pressure is 40t, 1 minute dwell time, obtains blank; C) sinter: blank is adopted nitrogen protective sintering at sintering oven, sintering temperature 1000 DEG C, be incubated 45 minutes; D) squeezing shaping: sintered products is extruded by mould, pressure is 45t, 0.5 minute dwell time, makes product more fine and close and controls physical dimension, forming smooth protective membrane on surface; E) flood: grease product first being put into the molybdenumdisulphide of 200 DEG C floods, and absorbs certain grease, then slushing oil will be put into flood.
Embodiment three
A kind of ferrous based powder metallurgical self-lubricating material, comprises following component: manganese 11.2%; Sulphur 14.12%; Chromium 9.15%; Nickel 3.36%; Molybdenum 0.91%; Graphite 5.1%, oxygen 2.16%, all the other are iron, are more than mass percent;
The preparation method of above-mentioned ferrous based powder metallurgical self-lubricating material, comprise the following steps: A) batch mixing: will the sulfuration manganese powder of said components, sulfuration iron powder, Z 250 powder, chromium powder, nickel powder, molybdenum powder, Graphite Powder 99 and iron powder Homogeneous phase mixing 4-6 hour in ball mill be comprised, wherein the granularity of graphite is 75 orders, the granularity of Z 250 and iron powder is 150 orders, the granularity of nickel powder is 250 orders, and the granularity of all the other powders is 260 orders; B) suppress: loaded in forming mould by powder after mixing and suppress, pressure is 40t, 1 minute dwell time, obtains blank; C) sinter: blank is adopted nitrogen protective sintering at sintering oven, sintering temperature 950 DEG C, be incubated 70 minutes; D) squeezing shaping: sintered products is extruded by mould, pressure is 43t, 0.75 minute dwell time, makes product more fine and close and controls physical dimension, forming smooth protective membrane on surface; E) flood: grease product first being put into the molybdenumdisulphide of 210 DEG C floods, and absorbs certain grease, then slushing oil will be put into flood.
As shown in Figures 1 to 4, the present invention uses the process furnace backing strap slide plate of above-mentioned ferrous based powder metallurgical self-lubricating material, comprise slide plate chair 1 and several inserts 2, slide plate chair 1 is provided with the open holes 3 of two notch cuttypes and several insert hole, each inserts 2 is located in respective insert hole, each inserts 2 all adopts the arbitrary ferrous based powder metallurgical self-lubricating material in embodiment one to three, each inserts 2 excircle is provided with the raised line 4 of five axis, described raised line 4 is trilateral, and five raised lines 4 are uniform on inserts excircle; Raised line 4 and insert hole are shrink-fit, and inserts 2 excircle and insert hole are running fit, and the lower surface of slide plate chair 1 is higher than the lower surface of inserts 2;
Each inserts 2 of the present invention is shrink-fit by the raised line of its five axis 4 with insert hole, inserts 2 excircle and insert hole are running fit, not only be convenient to processing, only need lower pressure can be pressed in insert hole by inserts 2, during use, between inserts 2 and slide plate chair 1, there is deformation space, effectively can eliminate thermal stresses, not easily crack, increase the service life, the lower surface of slide plate chair 1 higher than the lower surface of inserts 2, the lower surface of inserts 2 and guide rail contact, inserts 2 adopts ferrous based powder metallurgical self-lubricating material of the present invention, molybdenumdisulphide is generated by sintering, numerous micropores is there is in inserts 2 after adding sintering, molybdenumdisulphide grease is adsorbed by micropore by dipping, molybdenumdisulphide has good lubricity, molybdenumdisulphide expanded by heating in use in micropore, overflow from micropore, its self lubricity at 500 DEG C of-650 DEG C of hot stages can be ensured, molybdenum, the hard wild phase that chromium and nickel are formed is uniformly distributed with iron-based, both the intensity of matrix can jointly have been improved, wear resisting property and corrosion resistance nature, be uniformly distributed and reduce the impact on matrix toughness, nickel also has the little characteristic of the coefficient of expansion, the coefficient of expansion of inserts 2 can be controlled at smaller value, be only the 1/3-1/4 of general steel alloy, can avoid bursting slide plate chair 1, nickel and manganese can strengthen matrix toughness, bear thermal shocking, and hardness is relatively low, between HRB30-40, lower than the hardness (HRC45-50) of guide rail, moderate both having avoided of hardness in use self cracks, and reduces again the wearing and tearing of guide rail, meets the needs of operating mode, increase the service life, reduce production cost.
Claims (5)
1. a ferrous based powder metallurgical self-lubricating material, is characterized in that comprising following component: manganese 10-12.4%; Sulphur 14.12-17.71%; Chromium 7.82-9.15%; Nickel 2.91-3.84%; Molybdenum 0.91-3.04%; Graphite 2.1-5.1%, oxygen 1.8-2.36%, all the other are iron, are more than mass percent.
2. the preparation method of ferrous based powder metallurgical self-lubricating material as claimed in claim 1, it is characterized in that comprising the following steps: A) batch mixing: will the sulfuration manganese powder of component described in claim 1, sulfuration iron powder, Z 250 powder, chromium powder, nickel powder, molybdenum powder, Graphite Powder 99 and iron powder Homogeneous phase mixing 4-6 hour be comprised, wherein the granularity of graphite is 50-100 order, the granularity of Z 250 and iron powder is 100-200 order, the granularity of nickel powder is 200-250 order, and the granularity of all the other powders is 250-300 order; B) suppress: loaded in forming mould by powder after mixing and suppress, pressure is 35-40t, dwell time 1-2 minute, obtains blank; C) sinter: blank is adopted gas shield sintering at sintering oven, sintering temperature 900-1000 DEG C, insulation 45-90 minute; D) squeezing shaping: sintered products is extruded by mould, pressure is 40-45t, dwell time 0.5-1 minute, makes product more fine and close and controls physical dimension, forming smooth protective membrane on surface; E) flood: grease product being put into the molybdenumdisulphide of 190-210 DEG C floods, and absorbs certain grease.
3. the preparation method of ferrous based powder metallurgical self-lubricating material as claimed in claim 2, is characterized in that step C) in shielding gas be nitrogen or ammonia.
4. the preparation method of as claimed in claim 2 or claim 3 ferrous based powder metallurgical self-lubricating material, is characterized in that in step e) after again product is put into slushing oil and floods.
5. use the process furnace backing strap slide plate of ferrous based powder metallurgical self-lubricating material as claimed in claim 1, comprise slide plate chair and several inserts, slide plate chair is provided with the open holes of more than one notch cuttype and several insert hole, each inserts is located in respective insert hole, it is characterized in that each inserts all adopts ferrous based powder metallurgical self-lubricating material according to claim 1, inserts excircle is provided with the raised line of several axis, raised line and insert hole are shrink-fit, inserts excircle and insert hole are running fit, and the lower surface of slide plate chair is higher than the lower surface of inserts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510574832.9A CN105132831B (en) | 2015-09-11 | 2015-09-11 | Iron-based powder metallurgy self-lubricating material and heating furnace charge pad sliding plate using same |
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| CN201510574832.9A CN105132831B (en) | 2015-09-11 | 2015-09-11 | Iron-based powder metallurgy self-lubricating material and heating furnace charge pad sliding plate using same |
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| CN105132831B CN105132831B (en) | 2017-03-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108504949A (en) * | 2018-04-26 | 2018-09-07 | 中南大学 | A kind of iron-based self-lubricating wear-resistant alloy material and preparation method thereof |
| CN113309786A (en) * | 2021-04-13 | 2021-08-27 | 中国核电工程有限公司 | Sliding bearing, stirring device and mixer settler |
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| CN1818117A (en) * | 2006-03-14 | 2006-08-16 | 钢铁研究总院 | Self-lubricating heat-resistnat and wear-resistant materials |
| CN102383056A (en) * | 2011-09-26 | 2012-03-21 | 上海应用技术学院 | Novel iron-based self-lubricating material and preparation method thereof |
| CN104141087A (en) * | 2014-07-28 | 2014-11-12 | 宁国市开源电力耐磨材料有限公司 | Heat-resisting and wear-resisting iron-based self-lubricating material |
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2015
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Patent Citations (5)
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| JPS6456846A (en) * | 1987-08-27 | 1989-03-03 | Brother Ind Ltd | Production of self-lubricating composite material |
| JPS6483639A (en) * | 1987-09-26 | 1989-03-29 | Brother Ind Ltd | Manufacture of self-lubricative composite material |
| CN1818117A (en) * | 2006-03-14 | 2006-08-16 | 钢铁研究总院 | Self-lubricating heat-resistnat and wear-resistant materials |
| CN102383056A (en) * | 2011-09-26 | 2012-03-21 | 上海应用技术学院 | Novel iron-based self-lubricating material and preparation method thereof |
| CN104141087A (en) * | 2014-07-28 | 2014-11-12 | 宁国市开源电力耐磨材料有限公司 | Heat-resisting and wear-resisting iron-based self-lubricating material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108504949A (en) * | 2018-04-26 | 2018-09-07 | 中南大学 | A kind of iron-based self-lubricating wear-resistant alloy material and preparation method thereof |
| CN113309786A (en) * | 2021-04-13 | 2021-08-27 | 中国核电工程有限公司 | Sliding bearing, stirring device and mixer settler |
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| CN105132831B (en) | 2017-03-22 |
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