CN102676874A - Material and casting process method for lanthanum-copper bearing retainer - Google Patents
Material and casting process method for lanthanum-copper bearing retainer Download PDFInfo
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- CN102676874A CN102676874A CN2012101908787A CN201210190878A CN102676874A CN 102676874 A CN102676874 A CN 102676874A CN 2012101908787 A CN2012101908787 A CN 2012101908787A CN 201210190878 A CN201210190878 A CN 201210190878A CN 102676874 A CN102676874 A CN 102676874A
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Abstract
The invention discloses a material and a casting process method for a lanthanum-copper bearing retainer. The problems that the conventional rolling mill brass bearing retainer is easily worn and broken and the like are avoided, the internal structure of the material for the retainer is compact, the yield strength is improved by 15.7 percent, the tensile strength is improved by 6.2 percent, the elongation is basically same, and the processability is high; the work efficiency and product quality are obviously improved, a lot of energy and time are saved, and the service life is prolonged; and the method is simple, the production cost is effectively reduced and the method is suitable for promotion. The material for the lanthanum-copper bearing retainer comprises the following chemical compositions in percentage by weight: 57 to 60 percent of Cu, 0.8 to 1.9 percent of Pb, 0.2 to 0.6 percent of single rare earth metal La, less than or equal to 1 percent of impurities and the balance of Zn, wherein the sum of the weight percentage of the components is 100 percent. The casting process method for the lanthanum-copper bearing retainer sequentially comprises the following steps: blending, smelting, adding the single rare earth metal La, and casting.
Description
Technical field
The present invention relates to retainer, especially a kind of material and casting technique of lanthanum copper retainer.
Background technology
At present in the rolling mill bearing industry; The material of large-scale four-line column roller bearing, deep groove ball bearing and angular contact ball bearing adopts brass to process entity retainer mostly; Adopt centrifugally cast process method to produce and this brass retainer blank is general, again through car, bore, mill and be machined to finished product.
Yet interior tissue is loose, the thick uneven situation of crystal grain because brass material occurs in castingprocesses easily, and in casting, has impurity, the more defective of pore, causes brass solid cage wear resistance and intensity to reduce greatly; Learn that through long-term a large amount of investigations in actual use, existing brass retainer wearing and tearing often occur or fracture waits early failure phenomena, and the work-ing life of whole bearing and equipment serviceability are reduced; Therefore; Existing brass retainer quality product is low; Increased maintenance and maintenance cost, production cost is high, the labor energy and time; Thereby reduced working efficiency and existing its casting technique of brass retainer rationally science, development and update are slow inadequately, also cause occurring above-mentioned defective.
The quality critical of brass retainer is its material chemical composition and casting technique thereof, but less to the retainer material improvement for a long time; Some are also arranged to modern technique, but be difficult to be applied to retainer about the copper product innovation.For example: the patent No. 201110340577.3 discloses that " a kind of corrosion-resistant cu-zn-al alloy material; at present process copper zinc-aluminium brass alloys tubing, strip material; be to be matrix with copper zinc yellow copper alloy; through adding elements such as zinc, aluminium, nickel, silicon, boron, manganese, rare earth reaches high abrasion, height is anti-corrosion, high temperature resistant, processing characteristics is good purpose, satisfies the requirement with material of ocean exploitation industry, heat exchange and other special industries.Its chemical ingredients is by weight percentage: copper 74%-78%; Aluminium 1.4%-2.8%; At least a or mishmetal 0.005%-0.15% in nickel 0.2%-1.0%, silicon 0.1%-1.0%, boron 0.003%-0.015%, manganese 0.2%-0.8%, simple substance Rare Earth Lanthanum and the simple substance rare earth cerium, iron≤0.05%, plumbous≤0.05%, unavoidable impurities≤0.05%; Surplus is a zinc, and the each component sum is absolutely; Can produce the corrosion-resistant cu-zn-al alloy plate of material band or the tubing of meeting the need of market respectively through deformation processing.Effectively practiced thrift the energy, reduced production costs." though this material is very advanced; reached high abrasion, height is anti-corrosion, high temperature resistant, processing characteristics is good purpose; satisfy the requirement with material of ocean exploitation industry, heat exchange and other special industries; the mechanical property of this material can't satisfy the specification of quality of retainer, because this YIELD STRENGTH, tensile strength are lower, the ratio of ys and tensile strength is less; So; The occasion that this material can satisfy ocean industry, underground heat heat exchange utilization, sea farming and specific demand is arranged; Be widely used in industries such as sea water desaltination, shipbuilding, but this material is inappropriate for and is applied on the retainer, also do not have the precedent of research and development application on retainer.And the technology very complicated of this material like the inevitable labor time of machining bearing retainer and the energy, reduces working efficiency, and makes the work-ing life of whole bearing and equipment serviceability can not get ensureing, has potential safety hazard.Therefore, the material of existing brass retainer and casting technique thereof are the developing bottlenecks of bearing apparatus, are the insoluble for a long time technical barriers in this area, can not satisfy market and user's demand.
In view of above-mentioned reason, existing brass retainer material and casting technique thereof need be innovated improvement.
Summary of the invention
The objective of the invention is in order to overcome deficiency of the prior art; A kind of material and casting technique of lanthanum copper retainer are provided, have avoided problems such as existing rolling mill bearing brass retainer is easy to wear, fracture, make this retainer material inside organization fine and close more; Ys improves 15.7%; Tensile strength improves 6.2%, and elongation is basic identical, and processing characteristics is good; Obviously increase work efficiency and quality product, practice thrift mass energy and time, increase the service life; Method is simple, effectively reduces production costs, and is convenient to promote.
The present invention is in order to realize above-mentioned purpose; Adopt following technical scheme: a kind of lanthanum copper bearing holder material, its chemical ingredients constitutes by weight percentage: copper Cu57%～60%, plumbous Pb0.8%～1.9%; Simple substance Rare Earth Lanthanum La0.2%～0.6%; Total impurities≤1%, surplus are zinc Zn, and the each component sum is absolutely.
A kind of casting technique of lanthanum copper retainer is accomplished by batching → melting → adding simple substance Rare Earth Lanthanum → casting successively, and concrete process step carries out successively as follows:
Batching: the chemical ingredients according to a kind of lanthanum copper retainer is incited somebody to action according to weight percent: copper Cu57%～60%; Plumbous Pb0.8%～1.9%, simple substance Rare Earth Lanthanum La0.2%～0.6%, surplus is zinc Zn; It is hundred-percent batching that weighing is configured to the each component sum, in place then subsequent use;
Melting: will prepare burden and in the core line frequency furnace is arranged, carry out melting, and add earlier 50% of copper total amount in the batching in the stove, heating up is melted into liquation, and it is remaining 50% to add in the batching copper total amount again, is warming up to 950～1030 ℃; In order to prevent that the copper melt temperature is uneven, the local superheating oxidation, need fully to stir 5～10 minutes, stop to heat up, and adopt charcoal that stove inner melt face is carried out covering protection; When melt temperature is reduced to 900～950 ℃ naturally, add lead and zinc in the batching rapidly, be pressed under the liquation liquid level, do not stop to be stirred to fusing fully; Need carry out the stokehold inspection this moment, the main chemical compositions of inspection liquation, the claimed range that reaches the weight percent in the batching is qualified;
Add the simple substance Rare Earth Lanthanum: be pressed into the simple substance Rare Earth Lanthanum in solution with bell jar; And after slowly stirring 5～10 minutes; Prepare tapping casting immediately, molten metal is stopped in stove surpass one hour, otherwise can weaken the effect of simple substance Rare Earth Lanthanum the material modifying-refining;
The casting: with solution at whizzer top casting retainer blank, 900～950 ℃ of pouring temperatures, casting rate 7～8min/2.5m; Simultaneously with being fixed on the whizzer cooling of lowering the temperature of porous watercooling jacket, cooling water pressure 2～3kg/cm
3, make the cooling of retainer blank rapid and uniform, be cooled to till the solidification forming; Then, with being placed into normal temperature after the demoulding of retainer blank, again through car, bore, mill and be refined to finished product.
A kind of casting technique of lanthanum copper retainer is accomplished by batching → melting → adding simple substance Rare Earth Lanthanum → casting successively, and concrete process step carries out successively as follows:
Batching: the chemical ingredients according to a kind of lanthanum copper retainer is incited somebody to action according to weight percent: copper Cu57%, and plumbous Pb0.8%, simple substance Rare Earth Lanthanum La0.2%, surplus is zinc Zn, it is hundred-percent batching that weighing is configured to the each component sum, in place then subsequent use;
Melting: will prepare burden and in the core line frequency furnace is arranged, carry out melting, and add earlier 50% of copper total amount in the batching in the stove, heating up is melted into liquation, and it is remaining 50% to add in the batching copper total amount again, is warming up to 950 ℃; In order to prevent that the copper melt temperature is uneven, the local superheating oxidation, need fully to stir 5 minutes, stop to heat up, and adopt charcoal that stove inner melt face is carried out covering protection; When melt temperature is reduced to 900 ℃ naturally, add lead and zinc in the batching rapidly, be pressed under the liquation liquid level, do not stop to be stirred to fusing fully; Need carry out the stokehold inspection this moment, the main chemical compositions of inspection liquation, the claimed range that reaches the weight percent in the batching is qualified;
Add the simple substance Rare Earth Lanthanum: be pressed into the simple substance Rare Earth Lanthanum in solution with bell jar, and after slowly stirring 5 minutes, prepare tapping casting immediately, molten metal is stopped surpass one hour, otherwise can weaken the effect of simple substance Rare Earth Lanthanum to the material modifying-refining in stove;
The casting: with solution at whizzer top casting retainer blank, 900 ℃ of pouring temperatures, casting rate 7min/2.5m; Simultaneously with being fixed on the whizzer cooling of lowering the temperature of porous watercooling jacket, cooling water pressure 2kg/cm
3, make the cooling of retainer blank rapid and uniform, be cooled to till the solidification forming; Then, with being placed into normal temperature after the demoulding of retainer blank, again through car, bore, mill and be refined to finished product.
A kind of casting technique of lanthanum copper retainer is accomplished by batching → melting → adding simple substance Rare Earth Lanthanum → casting successively, and concrete process step carries out successively as follows:
Batching: the chemical ingredients according to a kind of lanthanum copper retainer is incited somebody to action according to weight percent: copper Cu60%, and plumbous Pb1.9%, simple substance Rare Earth Lanthanum La0.6%, surplus is zinc Zn, it is hundred-percent batching that weighing is configured to the each component sum, in place then subsequent use;
Melting: will prepare burden and in the core line frequency furnace is arranged, carry out melting, and add earlier 50% of copper total amount in the batching in the stove, heating up is melted into liquation, and it is remaining 50% to add in the batching copper total amount again, is warming up to 1030 ℃; In order to prevent that the copper melt temperature is uneven, the local superheating oxidation, need fully to stir 10 minutes, stop to heat up, and adopt charcoal that stove inner melt face is carried out covering protection; When melt temperature is reduced to 950 ℃ naturally, add lead and zinc in the batching rapidly, be pressed under the liquation liquid level, do not stop to be stirred to fusing fully; Need carry out the stokehold inspection this moment, the main chemical compositions of inspection liquation, the claimed range that reaches the weight percent in the batching is qualified;
Add the simple substance Rare Earth Lanthanum: be pressed into the simple substance Rare Earth Lanthanum in solution with bell jar, and after slowly stirring 10 minutes, prepare tapping casting immediately, molten metal is stopped surpass one hour, otherwise can weaken the effect of simple substance Rare Earth Lanthanum to the material modifying-refining in stove;
The casting: with solution at whizzer top casting retainer blank, 950 ℃ of pouring temperatures, casting rate 8min/2.5m; Simultaneously with being fixed on the whizzer cooling of lowering the temperature of porous watercooling jacket, cooling water pressure 3kg/cm
3, make the cooling of retainer blank rapid and uniform, be cooled to till the solidification forming; Then, with being placed into normal temperature after the demoulding of retainer blank, again through car, bore, mill and be refined to finished product.
A kind of casting technique of lanthanum copper retainer is accomplished by batching → melting → adding simple substance Rare Earth Lanthanum → casting successively, and concrete process step carries out successively as follows:
Batching: the chemical ingredients according to a kind of lanthanum copper retainer is incited somebody to action according to weight percent: copper Cu58%, and plumbous Pb1.3%, simple substance Rare Earth Lanthanum La0.35%, surplus is zinc Zn, it is hundred-percent batching that weighing is configured to the each component sum, in place then subsequent use;
Melting: will prepare burden and in the core line frequency furnace is arranged, carry out melting, and add earlier 50% of copper total amount in the batching in the stove, heating up is melted into liquation, and it is remaining 50% to add in the batching copper total amount again, is warming up to 990 ℃; In order to prevent that the copper melt temperature is uneven, the local superheating oxidation, need fully to stir 8 minutes, stop to heat up, and adopt charcoal that stove inner melt face is carried out covering protection; When melt temperature is reduced to 925 ℃ naturally, add lead and zinc in the batching rapidly, be pressed under the liquation liquid level, do not stop to be stirred to fusing fully; Need carry out the stokehold inspection this moment, the main chemical compositions of inspection liquation, the claimed range that reaches the weight percent in the batching is qualified;
Add the simple substance Rare Earth Lanthanum: be pressed into the simple substance Rare Earth Lanthanum in solution with bell jar, and after slowly stirring 8 minutes, prepare tapping casting immediately, molten metal is stopped surpass one hour, otherwise can weaken the effect of simple substance Rare Earth Lanthanum to the material modifying-refining in stove;
The casting: with solution at whizzer top casting retainer blank, 925 ℃ of pouring temperatures, casting rate 7.5min/2.5m; Simultaneously with being fixed on the whizzer cooling of lowering the temperature of porous watercooling jacket, cooling water pressure 2.5kg/cm
3, make the cooling of retainer blank rapid and uniform, be cooled to till the solidification forming; Then, with being placed into normal temperature after the demoulding of retainer blank, again through car, bore, mill and be refined to finished product.
Technological principle of the present invention is:
A, in matrix brass smelting process, add the simple substance Rare Earth Lanthanum and carry out to eliminate the impurity in the brass material when modifying-refining is handled; When containing impurity elements such as O, S, P when matrix brass; The simple substance Rare Earth Lanthanum can be produced HMP, low-density rare earth compound with impurity elements such as O, S, P; Easy emersion molten surface and being eliminated, thus purified the purity of matrix brass;
B, simple substance Rare Earth Lanthanum add in the brass, can be formed with one deck in the metallic surface as thin as a wafer and fine and close rare earth oxide, can stop Cu, the diffusion of Zn atom in liquation, reduce fusing speed, thereby have delayed intergranular corrosion, have improved the Dezincification corrosion performance of alloy;
C, simple substance Rare Earth Lanthanum can play the effect of pricking nail crystal grain in brass casting process of setting, rare earth atom elder generation nucleation becomes tiny crystal grain; Stop growing up of crystal grain; Organize densification more, in retainer blank (cast tube) process of cooling, add again and put porous mesh water jacket, accelerated speed of cooling and made cooling more even; Avoid the generation of thick column crystal, wait axle thin brilliant uniformly and form.
The simple substance Rare Earth Lanthanum has significant values in copper alloy; Can play degassing removal of impurities, improve the effect of the microstructure of copper; Make the α in the copper tissue tiny and even, improve the intensity and the hardness of matrix, strengthen the thermostability of Cu alloy material with β distribution mutually; Can also improve simultaneously the anti-corrosion and wear resisting property of copper alloy, reduce defectives such as impurity in the casting, loose and pore.
The invention has the beneficial effects as follows: technology is simply good, and design science is reasonable, and process for processing is easy, and is swift to operate reliable, safe and convenient to use; Avoided problems such as existing rolling mill bearing brass retainer is easy to wear, fracture, made this retainer material inside organization fine and close more, ys improves 15.7%, and tensile strength improves 6.2%, and elongation is basic identical, and processing characteristics is good; Obviously improve working efficiency and quality product, practiced thrift mass energy and time, prolonged work-ing life; Method is simple, effectively reduces production costs, and is convenient to promote.Guarantee that equipment is reliable stable, eliminated potential safety hazard.
The long-term a large amount of experiments of process are learnt: lanthanum copper bearing holder material of the present invention (2#) contrasts as follows with the mechanical property of market brass retainer material (1#):
Check in knowledge through long-term a large amount of the sight: the image comparison of the metallographic structure that lanthanum copper bearing holder material of the present invention and the micro-sight of market brass retainer material are looked into is following:
α and β present thick long lath mutually and distribute in the market brass as-cast structure, and tissue looseness, crystal grain are thick inhomogeneous, and impurity, pore are more.Add the rotten back of rare earth α and β obviously refinement mutually, thick lath-shaped α disappears with β mutually, become short and small sheet or etc. a shape crystal grain; Tissue tight, crystal grain are tiny evenly, and impurity, pore seldom are difficult to find.
Follow the tracks of discovery through nearly 1 year practical application effect; A kind of lanthanum copper retainer with casting technique making of the present invention; Phenomenons such as retainer weares and teares fast, fracture do not appear in the rolling mill bearing use again; The work-ing life and the equipment reliability of operation of a whole set of bearing are significantly improved, significantly reduce maintenance and maintenance cost, practiced thrift mass energy and time; Thereby significantly increase work efficiency and quality product.
The present invention is mainly used in and produces the rolling mill bearing solid cage, is adapted to the technical field of high speed, heavy duty, friction, wearing and tearing.Production cost is low, invests for a short time, is convenient to promote.Thereby satisfied market and user's demand, solved the insoluble for a long time technical barrier in this area.
Embodiment
Below in conjunction with embodiment and embodiment the present invention is done further explain:
Embodiment 1:
A kind of lanthanum copper bearing holder material, its chemical ingredients constitutes by weight percentage: copper Cu57%～60%, plumbous Pb0.8%～1.9%, simple substance Rare Earth Lanthanum La0.2%～0.6%, total impurities≤1%, surplus is zinc Zn, the each component sum is absolutely.
Embodiment 2:
A kind of casting technique of lanthanum copper retainer is accomplished by batching → melting → adding simple substance Rare Earth Lanthanum → casting successively, and concrete process step carries out successively as follows:
Batching: the chemical ingredients according to a kind of lanthanum copper retainer is incited somebody to action according to weight percent: copper Cu57%～60%; Plumbous Pb0.8%～1.9%, simple substance Rare Earth Lanthanum La0.2%～0.6%, surplus is zinc Zn; It is hundred-percent batching that weighing is configured to the each component sum, in place then subsequent use;
Melting: will prepare burden and in the core line frequency furnace is arranged, carry out melting, and add earlier 50% of copper total amount in the batching in the stove, heating up is melted into liquation, and it is remaining 50% to add in the batching copper total amount again, is warming up to 950～1030 ℃; In order to prevent that the copper melt temperature is uneven, the local superheating oxidation, need fully to stir 5～10 minutes, stop to heat up, and adopt charcoal that stove inner melt face is carried out covering protection; When melt temperature is reduced to 900～950 ℃ naturally, add lead and zinc in the batching rapidly, be pressed under the liquation liquid level, do not stop to be stirred to fusing fully; Need carry out the stokehold inspection this moment, the main chemical compositions of inspection liquation, the claimed range that reaches the weight percent in the batching is qualified;
Add the simple substance Rare Earth Lanthanum: be pressed into the simple substance Rare Earth Lanthanum in solution with bell jar; And after slowly stirring 5～10 minutes; Prepare tapping casting immediately, molten metal is stopped in stove surpass one hour, otherwise can weaken the effect of simple substance Rare Earth Lanthanum the material modifying-refining;
The casting: with solution at whizzer top casting retainer blank, 900～950 ℃ of pouring temperatures, casting rate 7～8min/2.5m; Simultaneously with being fixed on the whizzer cooling of lowering the temperature of porous watercooling jacket, cooling water pressure 2～3kg/cm
3, make the cooling of retainer blank rapid and uniform, be cooled to till the solidification forming; Then, with being placed into normal temperature after the demoulding of retainer blank, again through car, bore, mill and be refined to finished product.
Embodiment 3:
A kind of casting technique of lanthanum copper retainer is accomplished by batching → melting → adding simple substance Rare Earth Lanthanum → casting successively, and concrete process step carries out successively as follows:
Batching: the chemical ingredients according to a kind of lanthanum copper retainer is incited somebody to action according to weight percent: copper Cu57%, and plumbous Pb0.8%, simple substance Rare Earth Lanthanum La0.2%, surplus is zinc Zn, it is hundred-percent batching that weighing is configured to the each component sum, in place then subsequent use;
Melting: will prepare burden and in the core line frequency furnace is arranged, carry out melting, and add earlier 50% of copper total amount in the batching in the stove, heating up is melted into liquation, and it is remaining 50% to add in the batching copper total amount again, is warming up to 950 ℃; In order to prevent that the copper melt temperature is uneven, the local superheating oxidation, need fully to stir 5 minutes, stop to heat up, and adopt charcoal that stove inner melt face is carried out covering protection; When melt temperature is reduced to 900 ℃ naturally, add lead and zinc in the batching rapidly, be pressed under the liquation liquid level, do not stop to be stirred to fusing fully; Need carry out the stokehold inspection this moment, the main chemical compositions of inspection liquation, the claimed range that reaches the weight percent in the batching is qualified;
Add the simple substance Rare Earth Lanthanum: be pressed into the simple substance Rare Earth Lanthanum in solution with bell jar, and after slowly stirring 5 minutes, prepare tapping casting immediately, molten metal is stopped surpass one hour, otherwise can weaken the effect of simple substance Rare Earth Lanthanum to the material modifying-refining in stove;
The casting: with solution at whizzer top casting retainer blank, 900 ℃ of pouring temperatures, casting rate 7min/2.5m; Simultaneously with being fixed on the whizzer cooling of lowering the temperature of porous watercooling jacket, cooling water pressure 2kg/cm
3, make the cooling of retainer blank rapid and uniform, be cooled to till the solidification forming; Then, with being placed into normal temperature after the demoulding of retainer blank, again through car, bore, mill and be refined to finished product.
Embodiment 4:
A kind of casting technique of lanthanum copper retainer is accomplished by batching → melting → adding simple substance Rare Earth Lanthanum → casting successively, and concrete process step carries out successively as follows:
Batching: the chemical ingredients according to a kind of lanthanum copper retainer is incited somebody to action according to weight percent: copper Cu60%, and plumbous Pb1.9%, simple substance Rare Earth Lanthanum La0.6%, surplus is zinc Zn, it is hundred-percent batching that weighing is configured to the each component sum, in place then subsequent use;
Melting: will prepare burden and in the core line frequency furnace is arranged, carry out melting, and add earlier 50% of copper total amount in the batching in the stove, heating up is melted into liquation, and it is remaining 50% to add in the batching copper total amount again, is warming up to 1030 ℃; In order to prevent that the copper melt temperature is uneven, the local superheating oxidation, need fully to stir 10 minutes, stop to heat up, and adopt charcoal that stove inner melt face is carried out covering protection; When melt temperature is reduced to 950 ℃ naturally, add lead and zinc in the batching rapidly, be pressed under the liquation liquid level, do not stop to be stirred to fusing fully; Need carry out the stokehold inspection this moment, the main chemical compositions of inspection liquation, the claimed range that reaches the weight percent in the batching is qualified;
Add the simple substance Rare Earth Lanthanum: be pressed into the simple substance Rare Earth Lanthanum in solution with bell jar, and after slowly stirring 10 minutes, prepare tapping casting immediately, molten metal is stopped surpass one hour, otherwise can weaken the effect of simple substance Rare Earth Lanthanum to the material modifying-refining in stove;
The casting: with solution at whizzer top casting retainer blank, 950 ℃ of pouring temperatures, casting rate 8min/2.5m; Simultaneously with being fixed on the whizzer cooling of lowering the temperature of porous watercooling jacket, cooling water pressure 3kg/cm
3, make the cooling of retainer blank rapid and uniform, be cooled to till the solidification forming; Then, with being placed into normal temperature after the demoulding of retainer blank, again through car, bore, mill and be refined to finished product.
Embodiment 5:
A kind of casting technique of lanthanum copper retainer is accomplished by batching → melting → adding simple substance Rare Earth Lanthanum → casting successively, and concrete process step carries out successively as follows:
Batching: the chemical ingredients according to a kind of lanthanum copper retainer is incited somebody to action according to weight percent: copper Cu58%, and plumbous Pb1.3%, simple substance Rare Earth Lanthanum La0.35%, surplus is zinc Zn, it is hundred-percent batching that weighing is configured to the each component sum, in place then subsequent use;
Melting: will prepare burden and in the core line frequency furnace is arranged, carry out melting, and add earlier 50% of copper total amount in the batching in the stove, heating up is melted into liquation, and it is remaining 50% to add in the batching copper total amount again, is warming up to 990 ℃; In order to prevent that the copper melt temperature is uneven, the local superheating oxidation, need fully to stir 8 minutes, stop to heat up, and adopt charcoal that stove inner melt face is carried out covering protection; When melt temperature is reduced to 925 ℃ naturally, add lead and zinc in the batching rapidly, be pressed under the liquation liquid level, do not stop to be stirred to fusing fully; Need carry out the stokehold inspection this moment, the main chemical compositions of inspection liquation, the claimed range that reaches the weight percent in the batching is qualified;
Add the simple substance Rare Earth Lanthanum: be pressed into the simple substance Rare Earth Lanthanum in solution with bell jar, and after slowly stirring 8 minutes, prepare tapping casting immediately, molten metal is stopped surpass one hour, otherwise can weaken the effect of simple substance Rare Earth Lanthanum to the material modifying-refining in stove;
The casting: with solution at whizzer top casting retainer blank, 925 ℃ of pouring temperatures, casting rate 7.5min/2.5m; Simultaneously with being fixed on the whizzer cooling of lowering the temperature of porous watercooling jacket, cooling water pressure 2.5kg/cm
3, make the cooling of retainer blank rapid and uniform, be cooled to till the solidification forming; Then, with being placed into normal temperature after the demoulding of retainer blank, again through car, bore, mill and be refined to finished product.
Claims (5)
1. lanthanum copper bearing holder material, it is characterized in that: its chemical ingredients constitutes by weight percentage: copper Cu57%～60%, plumbous Pb0.8%～1.9%; Simple substance Rare Earth Lanthanum La0.2%～0.6%; Total impurities≤1%, surplus are zinc Zn, and the each component sum is absolutely.
2. the casting technique of a lanthanum copper retainer, it is characterized in that: accomplished successively by batching → melting → adding simple substance Rare Earth Lanthanum → casting, concrete process step carries out successively as follows:
Batching: the chemical ingredients according to a kind of lanthanum copper retainer is incited somebody to action according to weight percent: copper Cu57%～60%; Plumbous Pb0.8%～1.9%, simple substance Rare Earth Lanthanum La0.2%～0.6%, surplus is zinc Zn; It is hundred-percent batching that weighing is configured to the each component sum, in place then subsequent use;
Melting: will prepare burden and in the core line frequency furnace is arranged, carry out melting, and add earlier 50% of copper total amount in the batching in the stove, heating up is melted into liquation, and it is remaining 50% to add in the batching copper total amount again, is warming up to 950～1030 ℃; In order to prevent that the copper melt temperature is uneven, the local superheating oxidation, need fully to stir 5～10 minutes, stop to heat up, and adopt charcoal that stove inner melt face is carried out covering protection; When melt temperature is reduced to 900～950 ℃ naturally, add lead and zinc in the batching rapidly, be pressed under the liquation liquid level, do not stop to be stirred to fusing fully; Need carry out the stokehold inspection this moment, the main chemical compositions of inspection liquation, the claimed range that reaches the weight percent in the batching is qualified;
Add the simple substance Rare Earth Lanthanum: be pressed into the simple substance Rare Earth Lanthanum in solution with bell jar; And after slowly stirring 5～10 minutes; Prepare tapping casting immediately, molten metal is stopped in stove surpass one hour, otherwise can weaken the effect of simple substance Rare Earth Lanthanum the material modifying-refining;
The casting: with solution at whizzer top casting retainer blank, 900～950 ℃ of pouring temperatures, casting rate 7～8min/2.5m; Simultaneously with being fixed on the whizzer cooling of lowering the temperature of porous watercooling jacket, cooling water pressure 2～3kg/cm
3, make the cooling of retainer blank rapid and uniform, be cooled to till the solidification forming; Then, with being placed into normal temperature after the demoulding of retainer blank, again through car, bore, mill and be refined to finished product.
3. the casting technique of a kind of lanthanum copper retainer according to claim 2 is characterized in that: accomplished successively by batching → melting → adding simple substance Rare Earth Lanthanum → casting, concrete process step carries out successively as follows:
Batching: the chemical ingredients according to a kind of lanthanum copper retainer is incited somebody to action according to weight percent: copper Cu57%, and plumbous Pb0.8%, simple substance Rare Earth Lanthanum La0.2%, surplus is zinc Zn, it is hundred-percent batching that weighing is configured to the each component sum, in place then subsequent use;
Melting: will prepare burden and in the core line frequency furnace is arranged, carry out melting, and add earlier 50% of copper total amount in the batching in the stove, heating up is melted into liquation, and it is remaining 50% to add in the batching copper total amount again, is warming up to 950 ℃; In order to prevent that the copper melt temperature is uneven, the local superheating oxidation, need fully to stir 5 minutes, stop to heat up, and adopt charcoal that stove inner melt face is carried out covering protection; When melt temperature is reduced to 900 ℃ naturally, add lead and zinc in the batching rapidly, be pressed under the liquation liquid level, do not stop to be stirred to fusing fully; Need carry out the stokehold inspection this moment, the main chemical compositions of inspection liquation, the claimed range that reaches the weight percent in the batching is qualified;
Add the simple substance Rare Earth Lanthanum: be pressed into the simple substance Rare Earth Lanthanum in solution with bell jar, and after slowly stirring 5 minutes, prepare tapping casting immediately, molten metal is stopped surpass one hour, otherwise can weaken the effect of simple substance Rare Earth Lanthanum to the material modifying-refining in stove;
The casting: with solution at whizzer top casting retainer blank, 900 ℃ of pouring temperatures, casting rate 7min/2.5m; Simultaneously with being fixed on the whizzer cooling of lowering the temperature of porous watercooling jacket, cooling water pressure 2kg/cm
3, make the cooling of retainer blank rapid and uniform, be cooled to till the solidification forming; Then, with being placed into normal temperature after the demoulding of retainer blank, again through car, bore, mill and be refined to finished product.
4. the casting technique of a kind of lanthanum copper retainer according to claim 2 is characterized in that: accomplished successively by batching → melting → adding simple substance Rare Earth Lanthanum → casting, concrete process step carries out successively as follows:
Batching: the chemical ingredients according to a kind of lanthanum copper retainer is incited somebody to action according to weight percent: copper Cu60%, and plumbous Pb1.9%, simple substance Rare Earth Lanthanum La0.6%, surplus is zinc Zn, it is hundred-percent batching that weighing is configured to the each component sum, in place then subsequent use;
Melting: will prepare burden and in the core line frequency furnace is arranged, carry out melting, and add earlier 50% of copper total amount in the batching in the stove, heating up is melted into liquation, and it is remaining 50% to add in the batching copper total amount again, is warming up to 1030 ℃; In order to prevent that the copper melt temperature is uneven, the local superheating oxidation, need fully to stir 10 minutes, stop to heat up, and adopt charcoal that stove inner melt face is carried out covering protection; When melt temperature is reduced to 950 ℃ naturally, add lead and zinc in the batching rapidly, be pressed under the liquation liquid level, do not stop to be stirred to fusing fully; Need carry out the stokehold inspection this moment, the main chemical compositions of inspection liquation, the claimed range that reaches the weight percent in the batching is qualified;
Add the simple substance Rare Earth Lanthanum: be pressed into the simple substance Rare Earth Lanthanum in solution with bell jar, and after slowly stirring 10 minutes, prepare tapping casting immediately, molten metal is stopped surpass one hour, otherwise can weaken the effect of simple substance Rare Earth Lanthanum to the material modifying-refining in stove;
The casting: with solution at whizzer top casting retainer blank, 950 ℃ of pouring temperatures, casting rate 8min/2.5m; Simultaneously with being fixed on the whizzer cooling of lowering the temperature of porous watercooling jacket, cooling water pressure 3kg/cm
3, make the cooling of retainer blank rapid and uniform, be cooled to till the solidification forming; Then, with being placed into normal temperature after the demoulding of retainer blank, again through car, bore, mill and be refined to finished product.
5. the casting technique of a kind of lanthanum copper retainer according to claim 2 is characterized in that: accomplished successively by batching → melting → adding simple substance Rare Earth Lanthanum → casting, concrete process step carries out successively as follows:
Batching: the chemical ingredients according to a kind of lanthanum copper retainer is incited somebody to action according to weight percent: copper Cu58%, and plumbous Pb1.3%, simple substance Rare Earth Lanthanum La0.35%, surplus is zinc Zn, it is hundred-percent batching that weighing is configured to the each component sum, in place then subsequent use;
Melting: will prepare burden and in the core line frequency furnace is arranged, carry out melting, and add earlier 50% of copper total amount in the batching in the stove, heating up is melted into liquation, and it is remaining 50% to add in the batching copper total amount again, is warming up to 990 ℃; In order to prevent that the copper melt temperature is uneven, the local superheating oxidation, need fully to stir 8 minutes, stop to heat up, and adopt charcoal that stove inner melt face is carried out covering protection; When melt temperature is reduced to 925 ℃ naturally, add lead and zinc in the batching rapidly, be pressed under the liquation liquid level, do not stop to be stirred to fusing fully; Need carry out the stokehold inspection this moment, the main chemical compositions of inspection liquation, the claimed range that reaches the weight percent in the batching is qualified;
Add the simple substance Rare Earth Lanthanum: be pressed into the simple substance Rare Earth Lanthanum in solution with bell jar, and after slowly stirring 8 minutes, prepare tapping casting immediately, molten metal is stopped surpass one hour, otherwise can weaken the effect of simple substance Rare Earth Lanthanum to the material modifying-refining in stove;
The casting: with solution at whizzer top casting retainer blank, 925 ℃ of pouring temperatures, casting rate 7.5min/2.5m; Simultaneously with being fixed on the whizzer cooling of lowering the temperature of porous watercooling jacket, cooling water pressure 2.5kg/cm
3, make the cooling of retainer blank rapid and uniform, be cooled to till the solidification forming; Then, with being placed into normal temperature after the demoulding of retainer blank, again through car, bore, mill and be refined to finished product.
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| CN2012101908787A CN102676874A (en) | 2012-06-12 | 2012-06-12 | Material and casting process method for lanthanum-copper bearing retainer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104630552A (en) * | 2015-01-12 | 2015-05-20 | 洛阳Lyc轴承有限公司 | Manganese brass retainer for mechanical and mine bearings |
| CN105240408A (en) * | 2015-09-28 | 2016-01-13 | 苏州市大力电器有限公司 | Method for manufacturing high-performance bearing retainer |
| WO2018028090A1 (en) * | 2016-08-09 | 2018-02-15 | 苏州天兼新材料科技有限公司 | Casting material for abrasion-resistant pump block of nuclear-powered steam turbine and manufacturing method therefor |
| CN108531756A (en) * | 2018-04-16 | 2018-09-14 | 东莞市德景五金钮扣有限公司 | A kind of production technology improving brass material tensile strength and crystal grain refinement |
| CN112048636A (en) * | 2020-09-02 | 2020-12-08 | 瑞安市五星铜业有限公司 | Method for improving tensile strength and grain refinement of brass strip material |
| CN113560504A (en) * | 2021-07-20 | 2021-10-29 | 浙江中精轴承有限公司 | Retainer edge-turning-free forming method based on composite process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104630552A (en) * | 2015-01-12 | 2015-05-20 | 洛阳Lyc轴承有限公司 | Manganese brass retainer for mechanical and mine bearings |
| CN105240408A (en) * | 2015-09-28 | 2016-01-13 | 苏州市大力电器有限公司 | Method for manufacturing high-performance bearing retainer |
| WO2018028090A1 (en) * | 2016-08-09 | 2018-02-15 | 苏州天兼新材料科技有限公司 | Casting material for abrasion-resistant pump block of nuclear-powered steam turbine and manufacturing method therefor |
| CN108531756A (en) * | 2018-04-16 | 2018-09-14 | 东莞市德景五金钮扣有限公司 | A kind of production technology improving brass material tensile strength and crystal grain refinement |
| CN112048636A (en) * | 2020-09-02 | 2020-12-08 | 瑞安市五星铜业有限公司 | Method for improving tensile strength and grain refinement of brass strip material |
| CN113560504A (en) * | 2021-07-20 | 2021-10-29 | 浙江中精轴承有限公司 | Retainer edge-turning-free forming method based on composite process |
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