CN101596583B - Compound centrifugal manufacturing method for axial sleeve of bushing - Google Patents
Compound centrifugal manufacturing method for axial sleeve of bushing Download PDFInfo
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- CN101596583B CN101596583B CN2009101598242A CN200910159824A CN101596583B CN 101596583 B CN101596583 B CN 101596583B CN 2009101598242 A CN2009101598242 A CN 2009101598242A CN 200910159824 A CN200910159824 A CN 200910159824A CN 101596583 B CN101596583 B CN 101596583B
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Abstract
The invention discloses a compound centrifugal manufacturing method for an axial sleeve of a bushing, which comprises the following steps: smelting molten metal of an iron-based material and molten metal of a cobalt-base alloy in two smelting furnaces respectively; performing deslagging and deoxidation treatment after the melting down of the molten metal of the iron-based material and the molten metal of the cobalt-base alloy; performing centrifugal casting on the outer layer molten metal of the cobalt-base alloy first, and adding an acid slag protective agent along with the outer layer molten metal of the cobalt-base alloy when the outer layer molten metal of the cobalt-base alloy is cast to 20 to 30 percent of the gross weight of the outer layer molten metal of the cobalt-base alloy needing to be cast; passing 3 to 5 minutes after the outer layer molten metal is cast, and after solidifying the outer layer molten metal of the cobalt-base alloy, casting the inner layer molten metal of the iron-based material until finishing; and under the action of centrifugal force, cooling and solidifying the inner layer molten metal and the outer layer molten metal into a blank of a compound centrifugal axial sleeve of a bushing, and assembling and processing the blank.
Description
Technical field
The present invention relates to the compound centrifugal manufacturing method of axial sleeve of bushing, relate to the compound centrifugal manufacturing method of the axial sleeve of bushing that sinking roller and stable roller use particularly.
Background technology
Hot coating is because the production efficiency height has obtained application comparatively widely in metallurgical and clad steel sheet industry at present.But the used axial sleeve of bushing of roller and stable roller that sinks at present mostly adopts iron-based material, ceramic material or surface spraying material.Yet the iron-based material is not wear-resistant, service life is short, wear surface is coarse, deep trench is arranged; Ceramic material in use is easy to produce because of the cracking that impact causes, service life instability; The sprayed coating thickness of surface spraying material is limited.
Summary of the invention
Technical problem to be solved by this invention provides a kind of compound centrifugal manufacturing method of axial sleeve of bushing of sink roller and stable roller two ends, described axial sleeve of bushing is under the condition of work of hot-dip aluminizing zinc liquid, heat galvanizing liquid, hot dip zinc-aluminium, hot dip fine aluminium liquid etc., have good corrosion-resistant, wear-resistant, wear surface is smooth, heat conductivility, enough intensity, percentage elongation, less thermal coefficient of expansion, low good heat-resistant anti-fatigue parameters such as modulus of elasticity, compare with the ceramic material axial sleeve of bushing with existing iron-based material, life-span and reliable and stable degree improve greatly.
The invention provides a kind of compound centrifugal manufacturing method of axial sleeve of bushing, this method may further comprise the steps: iron molten metal and cobalt-base alloys molten metal are carried out melting respectively in two smelting furnaces; Iron molten metal and cobalt-base alloys molten metal remove slag and deoxidation treatment after melting clearly; Earlier outer cobalt-base alloys molten metal is carried out spun casting, treat that outer cobalt-base alloys molten metal is cast to 20%～30% o'clock of the outer cobalt-base alloys molten metal gross weight that needs casting and adds glass flux shielding agent with outer cobalt-base alloys molten metal; Wait to have cast outer sphere molten metal 3～5 minutes, the iron molten metal of the internal layer material of after outer cobalt-base alloys molten metal solidifies, casting, up to end, inside and outside double layer of metal liquid cooled and solidified under centrifugal action is the blank of centrifugal composite bearing axle sleeve.
According to embodiments of the invention, the component of described cobalt-base alloys is by weight percentage: the Cr of 10%-40%, 0.1%～15% Ni, 0.1%～15% W, 0.1%～10% Mo, 0.01%～5.0% V, 0.01%～5.0% Ti, 0.01%～1.5% C, 0.01%～20% Fe, 0.01%～5.0% Al, 0.1%～3.0% Mn, 0.01%～5.0% Nb, 0.1%～3.0% Si, all the other are Co.
Description of drawings
Fig. 1 is according to axial sleeve of bushing structural representation of the present invention.
Fig. 2 is the structural representation according to the layering of axial sleeve of bushing of the present invention.
Fig. 3 is that axial sleeve of bushing according to the present invention cuts open into semicircular structural representation vertically.
Fig. 4 is the structural representation that adds flange according to axial sleeve of bushing of the present invention end.
Fig. 5 is the structural representation that adds flange and end cap according to axial sleeve of bushing of the present invention end.
Fig. 6 A is the corrosion proof photo that illustrates according to axial sleeve of bushing of the present invention.
Fig. 6 B is the corrosion proof photo that illustrates according to the axial sleeve of bushing of prior art.
The specific embodiment
Describe in detail below in conjunction with embodiment and accompanying drawing compound centrifugal manufacturing method axial sleeve of bushing of the present invention.
Manufacture method according to centrifugal composite bearing axle sleeve of the present invention comprises the steps: iron molten metal and cobalt-base alloys molten metal are carried out melting respectively in two smelting furnaces; Iron molten metal and cobalt-base alloys molten metal remove slag and deoxidation treatment after melting clearly; Earlier outer cobalt-base alloys molten metal is carried out spun casting, treat that outer cobalt-base alloys molten metal is cast to 20%～30% o'clock of the outer cobalt-base alloys molten metal gross weight that needs casting and adds glass flux shielding agent with outer cobalt-base alloys molten metal; Wait to have cast outer sphere molten metal 3～5 minutes, the iron molten metal of the internal layer material of after outer cobalt-base alloys molten metal solidifies, casting, up to end, inside and outside double layer of metal liquid cooled and solidified under centrifugal action is the blank of centrifugal composite bearing axle sleeve.
In the present invention, the adding of glass flux shielding agent lasts till that always the casting of outer cobalt-base alloys molten metal finishes.Glass flux shielding agent adds the back fusing, evenly covers the molten steel inner surface, prevents the oxidation of inner surface molten metal.Determine the consumption of glass flux shielding agent, make glass flux shielding agent can cover the inner surface of whole cobalt-base alloys molten metals of casting fully; For example, cover the inner surface of whole cobalt-base alloys molten metals of casting with the thickness of 0.1cm～1.5cm.Alternatively, the addition of glass flux shielding agent is 30% of the whole cobalt-base alloys molten metal volumes that will cast.
Manufacture method according to centrifugal composite bearing axle sleeve of the present invention, the thickness ratio of iron and working surface layers (cobalt-base alloys) is preferably: iron accounts for the 50-95% of gross thickness, the 3-49% that cobalt-base alloys accounts for gross thickness, and the transition zone between iron and the cobalt-base alloys accounts for the 0.01-10% of gross thickness.In addition, above-mentioned iron can be ferrite, austenite or ferrite and austenitic duplex stainless steel.
According to the manufacture method of the blank of centrifugal composite bearing axle sleeve of the present invention, after the blank moulding of centrifugal composite bearing axle sleeve, it is carried out machining.Machining comprises carries out roughing and retrofit to its ectonexine surface, end face and end face chamfering.
In an embodiment of the present invention, can use in refining furnace such as electric arc furnaces, (high, in, power frequency) induction furnace, vaccum sensitive stove, AOD refining furnace, VOD refining furnace, LF ladle refining furnace and the melting furnace one or both as smelting furnace.
The present invention adopts the component of the working surface layers in the axial sleeve of bushing of sinking roller and stable roller to be by weight percentage: the Cr of 10%-40%, 0.1%～15% Ni, 0.1%～15% W, 0.1%～10% Mo, 0.01%～5.0% V, 0.01%～5.0% Ti, 0.01%～1.5% C, 0.01%～20% Fe, 0.01%～5.0% Al, 0.1%～3.0% Mn, 0.01%～5.0% Nb, 0.1%～3.0% Si, all the other are Co.
Below with the effect of each component in the working surface layers of specific explanations axial sleeve of bushing.
Chromium (Cr) is the important alloying element of cobalt-base alloys, and high chromium content guarantees the non-oxidizability and the corrosion resistance of alloy, chromium and cobalt can form a series of different tissues structures mutually and intermetallic compound.Chromium and carbon form Cr easily simultaneously
7C
3, Cr
23C
6Carbide reinforced phase and solution strengthening matrix, chromium can significantly improve the room temperature and the mechanical behavior under high temperature of cobalt-base alloys.Chromium content is crossed the low resistance to high temperature corrosion performance that will reduce cobalt-base alloys, and the chromium too high levels will reduce the creep rupture strength of cobalt-base alloys.In the present invention, preferably, the content of chromium is 10% to 40% by weight in the cobalt-base alloys.More preferably, take into account room temperature and mechanicals behavior under high temperature such as corrosion resistance, resistance to high temperature corrosion performance, creep rupture strength, the content of chromium is decided to be 20%-30%.
Nickel (Ni) solid solution well in the Co matrix, nickel are as the essential element of stable alpha-Co and fault quantity in cobalt-base alloys, might form Co in cobalt-base alloys
3Ni and CoNi
3Ordered phase, nickel can improve toughness, but can not improve the intensity of cobalt-base alloys, no invigoration effect.In the present invention, preferably, the content of nickel is less than 15% by weight in the cobalt-base alloys.If the content of Ni surpasses 15%, then will to a certain degree reduce the intensity of cobalt-base alloys.Preferably, the content of nickel is 0.1% to 10% by weight.
The alloying element of carbon and adding such as Cr, W, Mo etc. form carbide, obtain certain tissue and intensity.In the present invention, the content of carbon is 0.01% to 1.5% by weight.
Iron is the element of strong stable alpha-Co, and γ-Fe and infinitely solid solution of α-Co.Increase with iron-holder that hardness as, cobalt-base alloys descends, magnetic conductivity increases, and iron promotes intermetallic compound σ in the cobalt-base alloys to reach the generation of skeleton shape carbide mutually.In the present invention, preferably, the content of iron is 0.01%～20% by weight, more preferably is 0.01%～15%.
Tungsten can promote carbide form to strengthen the second phase invigoration effect, and itself again can the solution strengthening matrix, is the solution strengthening element.Cobalt and tungsten can form WCo
3, W
6Co
7Phase in the middle of two kinds.Along with variation of temperature, the solubility of tungsten changes.In the present invention, preferably, the content of tungsten is 0.1% to 15% by weight.More preferably, the content of tungsten is 0.1% to 10%.
Molybdenum also can promote carbide form to strengthen the second phase invigoration effect, and is similar with the effect of tungsten, and itself also can the solution strengthening matrix, is the solution strengthening element.But molybdenum is harmful to the high-temperature corrosion resistance of cobalt-base alloys.In the present invention, preferably, the content of molybdenum is 0.1% to 10% by weight.More preferably, the content of molybdenum is 0.1% to 5.5%.
The solid solution of vanadium (V) element and precipitation strength matrix, and heat resistance is improved significantly.Simultaneously can reduce the generation that alloy is the fire check of hot stage to a certain extent before cool to room temperature, promptly avoid cracking to a certain extent.In the present invention, the content of vanadium is 0.01% to 5.0% by weight.More preferably, the content of vanadium is 0.01% to 3.0%.
The solid solution of titanium (Ti) element and precipitation strength matrix, and heat resistance is improved significantly.In the present invention, the content of titanium is 0.01% to 5.0% by weight.More preferably, the content of titanium is 0.01% to 3.0%.
Aluminium (Al) has deoxidation, anti-oxidant, solution strengthening effect.In the present invention, the content of aluminium is 0.01% to 5.0% by weight.More preferably, the content of aluminium is 0.01% to 3.0%.
Manganese (Mn) improves the flowability and the casting character of alloy, can play deoxidation, slag making.In the present invention, the content of manganese is 0.1% to 3.0% by weight.More preferably, the content of manganese is 0.1% to 2.0%.
Carbon, nitrogen, oxygen in niobium (Nb) and the metal have extremely strong affinity, and the energy crystal grain thinning improves the intensity of metal and improves plasticity and toughness, improves resistance to corrosion simultaneously significantly.In the present invention, the content of niobium is 0.01% to 5.0% by weight.More preferably, the content of niobium is 0.01% to 3.0%.
Silicon (Si) also can improve the flowability and the casting character of alloy, can play deoxidation, slag making.In the present invention, the content of silicon is 0.1% to 3.0% by weight.More preferably, the content of silicon is 0.1% to 2.0%.
Fig. 1 to Fig. 5 shows the structure according to axial sleeve of bushing of the present invention.With reference to Fig. 4 as can be known, added flange 20, thereby be convenient to install, weld and use in the end of axle sleeve 10, thus the serviceability of raising axial sleeve of bushing.
In addition,, added flange 20 and end cap 30 respectively, thereby helped protecting centre bore and prevent axial motion, improved the serviceability of axial sleeve of bushing at the both ends of axle sleeve 10 with reference to Fig. 5.
With reference to Fig. 2, comprise three-decker according to the axial sleeve of bushing of the embodiment of the invention, that is, and iron layer 1, alloy transition layer 2 and cobalt-based alloy layer (that is working surface layers) 3.The axial sleeve of bushing of described three-decker is by above-mentioned centrifugal complex method manufacturing.
To specifically illustrate specific embodiments of the invention below.
Embodiment 1
Centrifugal compound sinking roller and stable roller bearing shell axle sleeve bottom matrix are the 00cr17Ni14Mo2 stainless steel, and chemical composition is for containing C≤0.03%, Cr16%-18%, Ni10%-14%, Mo2.00%-3.00%, Mn≤2.00%, Si≤1.00% by weight; Its working surface layers is a cobalt-base alloys, cobalt-base alloys contains by weight percentage: Si 0.5%, Mn 0.3%, C 0.6%, Al 0.5%, P＜0.07%, S＜0.07%, V 0.1%, Ti 0.1%, Cr 25%, Fe 6%, Ni 5%, Nb 1.5%, W 3%, Mo 3%, all the other are Co.The axial sleeve of bushing of prior art is starkly lower than axial sleeve of bushing of the present invention service time service time at identical unit, and axial sleeve of bushing of the present invention service time is that they are more than 3 times.
Centrifugal compound sinking roller and stable roller bearing shell axle sleeve bottom matrix are austenite heat-resistance stainless steel SUS316, and chemical composition is C≤0.08%, Cr 16%-18%, Ni 10%-14%, Mo 2.00%-3.00%, Mn≤2.00%, Si≤1.00%; Its working surface layers is a cobalt-base alloys, and the cobalt-base alloys composition is: Al 0.5%, Si 0.4%, Mn 0.7%, C 0.6%, Cr 20%, Fe 12%, Ni 3%, Nb 1.0%, W5%, Mo 2%, V0.2%, Ti0.2%, all the other are Co.The axial sleeve of bushing of prior art is starkly lower than axial sleeve of bushing of the present invention service time service time at identical unit, and axial sleeve of bushing of the present invention service time is that they are more than 3 times.
Centrifugal compound sinking roller and stable roller bearing shell axle sleeve bottom matrix are heat-resistance stainless steel ZG07Cr19Ni9, and chemical composition is C 0.07%, Cr 18-21%, and Ni 8.0-11.0%, Mn 1.5%, and Si 1.5%, P≤0.040%, S≤0.030%; Its working surface layers is a cobalt-base alloys, and the cobalt-base alloys composition is: Al 0.8%, Si 1.0%, C 1.5%, Mn 0.7%, Cr 26%, Fe 12%, Ni 3%, Nb 1.0%, W5%, Mo 2%, V 0.2%, Ti 0.2%, all the other are Co.The axial sleeve of bushing of prior art is starkly lower than axial sleeve of bushing of the present invention service time service time at identical unit, and axial sleeve of bushing of the present invention service time is that they are more than 3 times.
Fig. 6 A shows the corrosion proof photo according to axial sleeve of bushing of the present invention.Fig. 6 A is cobalt-base alloys according to the present invention soaks 58 days rear interfaces in the hot-dip aluminizing zinc pot a pattern, and wherein, the left side is a cobalt-base alloys, and the right is an aluminium zinc liquid.As can be seen from Figure 6A, the processing tool marks still exist, and the interface is clear.
Fig. 6 B shows the corrosion resistance photo according to the axial sleeve of bushing of prior art.Fig. 6 B is ferrous alloy soaks 1 day rear interface in the hot-dip aluminizing zinc pot a pattern.Wherein, the left side is a ferrous alloy, and the right is an aluminium zinc liquid.As can be seen from Figure 6B, the interface is difficult to because of heavy corrosion distinguish.
The axial sleeve of bushing bottom matrix of roller and stable roller of sinking according to an embodiment of the invention is irons such as stainless steel, its working surface layers is a cobalt-base alloys, under the corrosion and abrasive conditions of liquid metal, it is good to have intensity, percentage elongation, characteristics such as thermal coefficient of expansion is lower, the heat-resistant anti-fatigue performance is good, wear-resistant, long service life, wear surface are level and smooth improve a lot than existing axial sleeve of bushing preferably; Adopt complex technique simultaneously, reduced the cobalt-base alloys consumption, thereby also reduced cost.
Claims (7)
1. the compound centrifugal manufacturing method of an axial sleeve of bushing, this method may further comprise the steps:
Iron molten metal and cobalt-base alloys molten metal are carried out melting respectively in two smelting furnaces;
Iron molten metal and cobalt-base alloys molten metal remove slag and deoxidation treatment after melting clearly;
Earlier outer cobalt-base alloys molten metal is carried out spun casting, treat that outer cobalt-base alloys molten metal is cast to 20%～30% o'clock of the outer cobalt-base alloys molten metal gross weight that needs casting and adds glass flux shielding agent with outer cobalt-base alloys molten metal;
Wait to have cast after the outer cobalt-base alloys molten metal, the iron molten metal of the internal layer material of after outer cobalt-base alloys molten metal solidifies, casting, up to end, inside and outside double layer of metal liquid cooled and solidified under centrifugal action is the blank of centrifugal composite bearing axle sleeve,
Wherein, the component of described cobalt-base alloys is by weight percentage: the Cr of 10%-40%, 0.1%～15% Ni, 0.1%～15% W, 0.1%～10% Mo, 0.01%～5.0% V, 0.01%～5.0% Ti, 0.01%～1.5% C, 0.01%～20% Fe, 0.01%～5.0% Al, 0.1%～3.0% Mn, 0.01%～5.0% Nb, 0.1%～3.0% Si, all the other are Co.
2. the method for claim 1 is characterized in that after the blank moulding of centrifugal composite bearing axle sleeve it being carried out machining.
3. method as claimed in claim 2, it is characterized in that machining comprises carries out roughing and retrofit to its ectonexine surface, end face and end face chamfering.
4. the method for claim 1 is characterized in that using in electric arc furnaces, Efco-Northrup furnace, intermediate frequency furnace, power frequency induction furnace, vaccum sensitive stove, AOD refining furnace, VOD refining furnace, the LF ladle refining furnace one or both as smelting furnace.
5. the method for claim 1 is characterized in that described axial sleeve of bushing be used to sink roller or stable roller.
6. the method for claim 1, it is characterized in that the described iron and the thickness ratio of cobalt-base alloys are: iron accounts for the 50-95% of gross thickness, the 3-49% that cobalt-base alloys accounts for gross thickness, and the transition zone between iron and the cobalt-base alloys accounts for the 0.01-10% of gross thickness.
7. the method for claim 1 is characterized in that described iron is ferrite, austenite or austenite-ferrite stainless steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101598242A CN101596583B (en) | 2009-07-10 | 2009-07-10 | Compound centrifugal manufacturing method for axial sleeve of bushing |
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|---|---|---|---|
| CN2009101598242A CN101596583B (en) | 2009-07-10 | 2009-07-10 | Compound centrifugal manufacturing method for axial sleeve of bushing |
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| CN101596583B true CN101596583B (en) | 2011-04-13 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817848B (en) * | 2011-06-08 | 2015-05-06 | 广东美芝制冷设备有限公司 | Sliding plate of rotary compressor, and manufacturing method thereof |
| CN103418759B (en) * | 2013-08-06 | 2015-05-20 | 宝鸡海吉钛镍有限公司 | Method with glass as covering heat preservation agent for vacuum nickel ingot casting and special mould |
| CN104128588B (en) * | 2014-06-25 | 2016-02-24 | 西安交通大学 | A kind of semisolid continuous casting of composite bearing and electro-magnetic forming jockey |
| CN106636762B (en) * | 2016-12-30 | 2018-07-06 | 江苏鑫信润科技股份有限公司 | High-performance cobalt base superalloy brush filament material |
| CN107790667A (en) * | 2017-10-22 | 2018-03-13 | 郭新 | Stabilizing roller centre spinning method |
| CN113388758A (en) * | 2021-05-31 | 2021-09-14 | 芜湖舍达激光科技有限公司 | High-temperature corrosion resistant and long-service-life hard alloy shaft sleeve |
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