CN103252497B - A kind of preparation method of machine tool slider by powder metallurgy - Google Patents
A kind of preparation method of machine tool slider by powder metallurgy Download PDFInfo
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- CN103252497B CN103252497B CN201310120304.7A CN201310120304A CN103252497B CN 103252497 B CN103252497 B CN 103252497B CN 201310120304 A CN201310120304 A CN 201310120304A CN 103252497 B CN103252497 B CN 103252497B
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Abstract
The invention discloses a kind of preparation method of machine tool slider by powder metallurgy, it comprises the following steps: described lathe slide block is made up of the raw material of following weight percentage: the copper of the aluminium of the cerium of the manganese of the graphite of 0.6-0.8%, the carborundum powder of 0.2-0.4%, 0.4-0.6%, the nickel of 0.2-0.4%, 0.2-0.4%, the titanium of 0.2-0.4%, 0.4-0.6%, 1-2% zinc, 5-8%, the modified additive of 1-2%, all the other are iron, the modified additive of the present invention by adding, superfines is provided in mixed material, this superfines can be filled between oarse-grained gap, thus improve the apparent density of compound, and the main component of this superfines is nanometer iron powder and calcium stearate, by the new modified auxiliary agent that the auxiliary agents such as silane coupler obtain, further increase every physical characteristics such as the wearability of goods, wherein plastic of poly vinyl acetate and atoleine add in modified additive as lubricant, enhance the effect of this modified additive in mixing compacting, powder metallurgy structural part compact strength is significantly improved under equal pressing pressure, change raw materials particles combining form and pore shape, the generation of crackle is solved from root.
Description
Technical field
The present invention relates generally to a kind of preparation method of machine tool slider by powder metallurgy, belongs to casting field.
Background technology
Along with the economic development of China, powder metallurgy structure purposes is more and more wider.Powder metallurgy, as a kind of near-net-shape technology, has very large economic advantages when parts that batch is large, dimensional accuracy is high, processing charges are high such as production structure parts.But there is a weakness in powder metallurgy structural part: product not sinter front compact strength very low, cause shaping with handling process in easily there is crackle, and cannot to find out in the fabrication process.This is if vehicle key position part is fatal defect in some application, and result in powder metallurgy structural part and can only be applied on medium to low-risk stressed member, the scope of application is limited by very large.
Powder metallurgy structural part intensity mainly affects by three aspect factors: one is material composition, and two is product densities, three are products shaping with handling process in whether there is crackle.Material composition affects manufacturing cost, and product density affects very large on forming bench and mould loss, and crackle is mainly by pressed compact intensity effect, and is difficult to find out.
Summary of the invention
The object of the invention is exactly the defect in order to make up prior art, provides a kind of preparation method of machine tool slider by powder metallurgy.
The present invention is achieved by the following technical solutions:
A preparation method for machine tool slider by powder metallurgy, it comprises the following steps:
(1) prepare burden: described lathe slide block is made up of the raw material of following weight percentage:
The copper of the aluminium of the cerium of the manganese of the graphite of 0.6-0.8%, the carborundum powder of 0.2-0.4%, 0.4-0.6%, the nickel of 0.2-0.4%, 0.2-0.4%, the titanium of 0.2-0.4%, 0.4-0.6%, 1-2% zinc, 5-8%, the modified additive of 1-2%, all the other are iron;
Described modified additive is made up of the raw material of following weight parts:
Nanometer iron powder 90-100, calcium hydroxide 30-40, stearic acid 30-40, cumyl peroxide 6-8, plastic of poly vinyl acetate 8-10, sorbitan monooleate 2-4, AEO 2-3, atoleine 3-4,1,2-two (triethoxy is silica-based) ethane 0.8-1, water are appropriate;
The preparation method of described modified additive comprises the following steps:
A, by the water of the quality such as the calcium hydroxide of above-mentioned weight portion joins, agitating heating 20-30 minute at 90-110 DEG C, obtains calcium hydroxide aqueous solution;
B, the stearic acid of above-mentioned weight portion is heated to 60-70 DEG C, add the sorbitan monooleate of above-mentioned weight portion, AEO, raised temperature is as 80-85 DEG C, constant temperature stirs 1-2 hour, slowly be added into above-mentioned calcium hydroxide aqueous solution under agitation, continue after interpolation to stir 1-2 hour, obtain mixed liquor;
C, by the nanometer iron powder Granular composite of above-mentioned weight portion in water, obtain the suspension containing nanometer iron powder;
D, the cumyl peroxide adding above-mentioned weight portion in the above-mentioned suspension containing nanometer iron powder, plastic of poly vinyl acetate, atoleine stir 40-50 minute under the speed of 500-600 rev/min, add 1 of above-mentioned weight portion again, the mixed liquor that two (triethoxy the is silica-based) ethane of 2-and step B obtain, high speed 1800-2000 rev/min is stirred 20-30 minute, dry, grind into superfines, obtain described modified additive.
(2) suppress: put into cold stamping die after being mixed by each raw material of above-mentioned weight portion, at the pressure 1-3 minute of 800-900MPa, make blank of colding pressing;
(3) sinter: be under the condition of vacuum, reducing atmosphere or inert atmosphere in sintering atmosphere, above-mentioned blank of colding pressing is sintered under the pressure of 1-5MPa, temperature schedule is: first pre-burning 5-10 minute at 300-500 DEG C, then with the speed raised temperature of 5-7 DEG C/minute, when temperature reaches 700-800 DEG C, constant temperature 15-25 minute, again with the speed raised temperature of 3-5 DEG C/minute, when temperature reaches 900-1050 DEG C, constant temperature 1-2 hour, and then cool to normal temperature with the speed of 4-6 DEG C/minute reduction temperature, obtain the semi-finished product of lathe slide block;
(4) heat treatment: the semi-finished product sintered being heated to temperature is 850-900 DEG C, insulation 1-3 hour, then enter oil groove quenching, oil temperature is 45-55 DEG C, sends into tempering furnace tempering 1-2 hour, temperature 300-400 DEG C after quenching;
(5) immersion oil: pour in bucket by 32# machine oil, the semi-finished product after above-mentioned heat treatment, to 80-95 DEG C, are put into wire basket by electricity consumption heat pipes heat, hang in fill machine oil and in the metal bucket of heating, soak to hang out after 25-35 minute to drain, and obtain described lathe slide block.
Advantage of the present invention is:
The modified additive of the present invention by adding, superfines is provided in mixed material, this superfines can be filled between oarse-grained gap, thus improve the apparent density of compound, and the main component of this superfines is nanometer iron powder and calcium stearate, pass through silane coupler, the new modified auxiliary agent that the auxiliary agents such as cumyl peroxide obtain, further increase every physical characteristics such as the wearability of goods, wherein plastic of poly vinyl acetate and atoleine add in modified additive as lubricant, enhance the effect of this modified additive in mixing compacting, powder metallurgy structural part compact strength is significantly improved under equal pressing pressure, change raw materials particles combining form and pore shape, the generation of crackle is solved from root.
Detailed description of the invention
Embodiment 1
A preparation method for machine tool slider by powder metallurgy, it comprises the following steps:
(1) prepare burden: described lathe slide block is made up of the raw material of following weight percentage:
The graphite of 0.8%, the carborundum powder of 0.4%, 0.6% manganese, 0.4% nickel, 0.4% cerium, 0.4% titanium, 0.6% aluminium, 2% zinc, 8% copper, 2% modified additive, all the other are iron;
Described modified additive is made up of the raw material of following weight parts:
Nanometer iron powder 100, calcium hydroxide 30-40, stearic acid 40, cumyl peroxide 8, plastic of poly vinyl acetate 10, sorbitan monooleate 4, AEO 3, atoleine 3-4,1,2-two (triethoxy is silica-based) ethane 0.8, water are appropriate;
The preparation method of described modified additive comprises the following steps:
A, by the water of the quality such as the calcium hydroxide of above-mentioned weight portion joins, agitating heating 20-30 minute at 110 DEG C, obtains calcium hydroxide aqueous solution;
B, the stearic acid of above-mentioned weight portion is heated to 70 DEG C, add the sorbitan monooleate of above-mentioned weight portion, AEO, raised temperature is as 85 DEG C, constant temperature stirs 2 hours, slowly be added into above-mentioned calcium hydroxide aqueous solution under agitation, continue stirring after interpolation 2 hours, obtain mixed liquor;
C, by the nanometer iron powder Granular composite of above-mentioned weight portion in water, obtain the suspension containing nanometer iron powder;
D, the cumyl peroxide adding above-mentioned weight portion in the above-mentioned suspension containing nanometer iron powder, plastic of poly vinyl acetate, atoleine stir 50 minutes under the speed of 600 revs/min, add 1 of above-mentioned weight portion again, the mixed liquor that two (triethoxy the is silica-based) ethane of 2-and step B obtain, 2000 revs/min are stirred 30 minutes at a high speed, dry, grind into superfines, obtain described modified additive.
(2) suppress: after being mixed by each raw material of above-mentioned weight portion, put into cold stamping die, in the pressure system 3 minutes of 900MPa, make blank of colding pressing;
(3) sinter: be under the condition of vacuum, reducing atmosphere or inert atmosphere in sintering atmosphere, above-mentioned blank of colding pressing is sintered under the pressure of 5MPa, temperature schedule is: first pre-burning 10 minutes at 500 DEG C, then with the speed raised temperature of 7 DEG C/minute, when temperature reaches 800 DEG C, constant temperature 15-25 minute, again with the speed raised temperature of 5 DEG C/minute, when temperature reaches 1050 DEG C, constant temperature 1-2 hour, and then cool to normal temperature with the speed of 4-6 DEG C/minute reduction temperature, obtain the semi-finished product of lathe slide block;
(4) heat treatment: the semi-finished product sintered being heated to temperature is 900 DEG C, is incubated 3 hours, and then enter oil groove quenching, oil temperature is 55 DEG C, sends into tempering furnace tempering 2 hours, temperature 400 DEG C after quenching;
(5) immersion oil: pour in bucket by 32# machine oil, the semi-finished product after above-mentioned heat treatment are put into wire basket by electricity consumption heat pipes heat to 95 DEG C, hang in fill machine oil and in the metal bucket of heating, soak to hang out after 35 minutes to drain, and obtain described lathe slide block.
Performance test:
Ultimate tensile strength intensity σ b (MPa): 815
Yield strength σ s (MPa): 510
Percentage elongation δ 5 (%): 16.7
Contraction percentage of area ψ (%): 39.
Claims (1)
1. a preparation method for machine tool slider by powder metallurgy, is characterized in that it comprises the following steps:
(1) prepare burden: described lathe slide block is made up of the raw material of following weight percentage: the copper of the aluminium of the cerium of the manganese of the graphite of 0.6-0.8%, the carborundum powder of 0.2-0.4%, 0.4-0.6%, the nickel of 0.2-0.4%, 0.2-0.4%, the titanium of 0.2-0.4%, 0.4-0.6%, 1-2% zinc, 5-8%, the modified additive of 1-2%, all the other are iron; Described modified additive is made up of the raw material of following weight parts: nanometer iron powder 90-100, calcium hydroxide 30-40, stearic acid 30-40, cumyl peroxide 6-8, plastic of poly vinyl acetate 8-10, sorbitan monooleate 2-4, AEO 2-3, atoleine 3-4,1,2-two (triethoxy is silica-based) ethane 0.8-1, water are appropriate; The preparation method of described modified additive comprises the following steps: A, by the water of the quality such as the calcium hydroxide of above-mentioned weight portion joins, agitating heating 20-30 minute at 90-110 DEG C, obtains calcium hydroxide aqueous solution; B, the stearic acid of above-mentioned weight portion is heated to 60-70 DEG C, add the sorbitan monooleate of above-mentioned weight portion, AEO, raised temperature is as 80-85 DEG C, constant temperature stirs 1-2 hour, slowly be added into above-mentioned calcium hydroxide aqueous solution under agitation, continue after interpolation to stir 1-2 hour, obtain mixed liquor; C, by the nanometer iron powder Granular composite of above-mentioned weight portion in water, obtain the suspension containing nanometer iron powder; D, the cumyl peroxide adding above-mentioned weight portion in the above-mentioned suspension containing nanometer iron powder, plastic of poly vinyl acetate, atoleine stir 40-50 minute under the speed of 500-600 rev/min, add 1 of above-mentioned weight portion again, the mixed liquor that two (triethoxy the is silica-based) ethane of 2-and step B obtain, high speed 1800-2000 rev/min is stirred 20-30 minute, dry, grind into superfines, obtain described modified additive;
(2) suppress: put into cold stamping die after being mixed by each raw material of above-mentioned weight portion, at the pressure 1-3 minute of 800-900MPa, make blank of colding pressing;
(3) sinter: be under the condition of vacuum, reducing atmosphere or inert atmosphere in sintering atmosphere, above-mentioned blank of colding pressing is sintered under the pressure of 1-5MPa, temperature schedule is: first pre-burning 5-10 minute at 300-500 DEG C, then with the speed raised temperature of 5-7 DEG C/minute, when temperature reaches 700-800 DEG C, constant temperature 15-25 minute, again with the speed raised temperature of 3-5 DEG C/minute, when temperature reaches 900-1050 DEG C, constant temperature 1-2 hour, and then reduce temperature to normal temperature with the speed of 4-6 DEG C/minute, obtain the semi-finished product of lathe slide block;
(4) heat treatment: the semi-finished product sintered being heated to temperature is 850-900 DEG C, insulation 1-3 hour, then enter oil groove quenching, oil temperature is 45-55 DEG C, sends into tempering furnace tempering 1-2 hour, temperature 300-400 DEG C after quenching;
(5) immersion oil: pour in bucket by 32# machine oil, the semi-finished product after above-mentioned heat treatment, to 80-95 DEG C, are put into wire basket by electricity consumption heat pipes heat, hang in fill machine oil and in the metal bucket of heating, soak to hang out after 25-35 minute to drain, and obtain described lathe slide block.
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| CN103567435A (en) * | 2013-10-10 | 2014-02-12 | 铜陵国方水暖科技有限责任公司 | Powder metallurgy flange and preparation method thereof |
| CN103540854B (en) * | 2013-10-11 | 2016-08-17 | 芜湖市鸿坤汽车零部件有限公司 | A kind of sintered metal powder bearing steel and preparation method thereof |
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| CN106086669A (en) * | 2016-06-13 | 2016-11-09 | 芜湖三刀材料科技有限公司 | A kind of wear-resistant gear and preparation method |
| CN105886929A (en) * | 2016-06-14 | 2016-08-24 | 芜湖三刀材料科技有限公司 | Iron-based insert material and preparation method |
| CN105886906A (en) * | 2016-06-27 | 2016-08-24 | 芜湖三刀材料科技有限公司 | Wear-resistant lining material and preparation method |
| CN114180605B (en) * | 2021-12-31 | 2024-02-06 | 青海创信电子材料有限公司 | Preparation method of magnesium oxide particles |
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| WO2002075171A1 (en) * | 2001-03-16 | 2002-09-26 | Sundram Fasteners Limited | Conrod and a method of producing the same |
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Effective date of registration: 20170822 Address after: 226600 No. 108 South Town Road, Haian County, Jiangsu, Nantong Patentee after: Haian Yingqiu Powder Metallurg Co., Ltd. Address before: Elu Jin Fan Yang Zhen 241200 Anhui city of Wuhu province Fanchang County No. 230 Building 8 Room 401 Patentee before: Wu Jianping |
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