CN106086687A - The preparation method of the sliding bearing that a kind of thermal coefficient of expansion is low - Google Patents

The preparation method of the sliding bearing that a kind of thermal coefficient of expansion is low Download PDF

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Publication number
CN106086687A
CN106086687A CN201610732470.6A CN201610732470A CN106086687A CN 106086687 A CN106086687 A CN 106086687A CN 201610732470 A CN201610732470 A CN 201610732470A CN 106086687 A CN106086687 A CN 106086687A
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China
Prior art keywords
expansion
temperature
sliding bearing
thermal coefficient
low
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Pending
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CN201610732470.6A
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Chinese (zh)
Inventor
李波
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Yinzhou Ningbo Xinhua Meter Motor Fittings Factory
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Yinzhou Ningbo Xinhua Meter Motor Fittings Factory
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Priority to CN201610732470.6A priority Critical patent/CN106086687A/en
Publication of CN106086687A publication Critical patent/CN106086687A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • B22F5/106—Tube or ring forms
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0264—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Sliding-Contact Bearings (AREA)
  • Lubricants (AREA)

Abstract

The invention discloses the preparation method of the low sliding bearing of a kind of thermal coefficient of expansion, including step in detail below: 1) batch mixing, by the powder making grain diameter averagely less than 8 microns of regrinding after following dusty material mixing by weight percentage: graphite 0.2 0.7%, aluminium oxide 0.01 0.03%, holmium 0.001 0.002%, chromium 0.1 0.15%, molybdenum bisuphide 0.2 0.3%, bismuth 0.01 0.05%, copper 0.3 0.5%, boron 0.02 0.03%, zinc stearate 0.3 0.45%, surplus is ferrum；It is relatively low that sliding bearing prepared by the inventive method has coefficient of friction, and anti-wear performance is high, the advantage that thermal coefficient of expansion is low.

Description

The preparation method of the sliding bearing that a kind of thermal coefficient of expansion is low
Technical field
The present invention relates to the preparation method of the low sliding bearing of a kind of thermal coefficient of expansion.
Background technology
Existing sliding bearing is compared with rolling bearing, and owing to coefficient of friction is higher, anti-wear performance is not enough, thermal coefficient of expansion High factor and seriously hinder its development.And in the parts that some low speed, loading demands are the highest, sliding bearing has quality Little, the advantage such as Stability Analysis of Structures, especially combine the characteristic of oil-free lubrication and develop that to be provided simultaneously with coefficient of friction relatively low, anti-wear performance Height, thermal coefficient of expansion is low, and the sliding bearing of oil-free lubrication has important practical significance.
Summary of the invention
The technical problem to be solved is, the shortcoming overcoming above prior art: provide a kind of coefficient of friction relatively Low, anti-wear performance is high, the preparation method of the sliding bearing that the thermal coefficient of expansion of oil-free lubrication is low.
The technical solution of the present invention is as follows: the preparation method of the sliding bearing that a kind of thermal coefficient of expansion is low, including with Lower concrete steps:
1) batch mixing, makes grain diameter averagely less than 8 microns by regrinding after following dusty material mixing by weight percentage Powder: graphite 0.2-0.7%, aluminium oxide 0.01-0.03%, holmium 0.001-0.002%, chromium 0.1-0.15%, molybdenum bisuphide 0.2-0.3%, bismuth 0.01-0.05%, copper 0.3-0.5%, boron 0.02-0.03%, zinc stearate 0.3-0.45%, surplus For ferrum；
2) compacting, uses the mode that one or many is filled, and in mould, the pressure with 600-750MPa suppresses the 130-260 second Molding；
3) sintering, first presintering 1-2 hour at a temperature of 600-800 DEG C, whole under 150-200MPa pressure in mould the most again Shape, sinters 1-3 hour at 1100-1250 DEG C, then divides the two-stage to lower the temperature, and the cooling rate of first stage is maintained at 2.5-3.5 DEG C/min, drop to temper when 400-450 DEG C at temperature, then naturally cool to immerse when 200 ± 20 DEG C Oil temperature is oil immersion in the deep fat of 110-130 DEG C.
As optimization, in step 1), the most each blend ingredients is: graphite 0.2%, aluminium oxide 0.01%, Holmium 0.001%, chromium 0.15%, molybdenum bisuphide 0.25%, bismuth 0.01%, copper 0.3%, boron 0.02%, zinc stearate 0.45%, surplus is ferrum.
The present invention compared with the existing technology provides the benefit that: the present invention is made between raw material by scientific and reasonable formula Tissue morphology well with guarantee bearing under high temperature, high pressure indeformable, carry high abrasion resistance strength, reduce coefficient of friction, especially Its thermal coefficient of expansion can be greatly reduced and realize the purpose without lubricating oil.By the technical program, the hardness of bearing surface is put down All can reach 350-362HB, temperature is at 350 DEG C, and the coefficient of friction after 12 hours is still less than 0.1, and thermal coefficient of expansion is down to 1.12×10-6/℃。
Detailed description of the invention
With specific embodiment, the present invention is described in further details below, but the present invention is not only limited to real in detail below Execute example.
Embodiment one
1) batch mixing, makes grain diameter averagely less than 8 microns by regrinding after following dusty material mixing by weight percentage Powder: graphite 0.2-0.7%, aluminium oxide 0.01-0.03%, holmium 0.001-0.002%, chromium 0.1-0.15%, molybdenum bisuphide 0.2-0.3%, bismuth 0.01-0.05%, copper 0.3-0.5%, boron 0.02-0.03%, zinc stearate 0.3-0.45%, surplus For ferrum；
2) compacting, uses the mode that one or many is filled, and in mould, the pressure with 600-750MPa suppresses the 130-260 second Molding；
3) sintering, first presintering 1-2 hour at a temperature of 600-800 DEG C, the most again with 150-200MPa pressure in mould Lower shaping, sinters 1-3 hour at 1100-1250 DEG C, then divides the two-stage to lower the temperature, and the cooling rate of first stage keeps At 2.5-3.5 DEG C/min, drop to temper when 400-450 DEG C at temperature, then naturally cool to leaching when 200 ± 20 DEG C Enter oil temperature oil immersion in the deep fat of 110-130 DEG C.
Embodiment two
1) batch mixing, makes grain diameter averagely less than 8 microns by regrinding after following dusty material mixing by weight percentage Powder: graphite 0.5%, aluminium oxide 0.02%, holmium 0.001%, chromium 0.15%, molybdenum bisuphide 0.3%, bismuth 0.05%, copper 0.5%, boron 0.02%, zinc stearate 0.3%, surplus is ferrum；
2) compacting, uses the mode that one or many is filled, and in mould, the pressure with 750MPa suppresses molding in 260 seconds；
3) sintering, first presintering 1-2 hour at a temperature of 800 DEG C, the most again with shaping under 200MPa pressure in mould, then Sintering 3 hours at 1250 DEG C, then divide the two-stage to lower the temperature, the cooling rate of first stage is maintained at 2.5 DEG C/min, in temperature Temper when degree drops to 450 DEG C, then naturally cools to immerse oil temperature oil in the hot engine oil of 130 DEG C when 200 ± 20 DEG C Leaching.
Embodiment three
1) batch mixing, makes grain diameter averagely less than 8 microns by regrinding after following dusty material mixing by weight percentage Powder: graphite 0.2%, aluminium oxide 0.01%, holmium 0.001%, chromium 0.15%, molybdenum bisuphide 0.25%, bismuth 0.01%, Copper 0.3%, boron 0.02%, zinc stearate 0.45%, surplus is ferrum.
2) compacting, uses the mode that one or many is filled, and in mould, the pressure with 600MPa suppresses molding in 260 seconds；
3) sintering, first presintering 2 hours at a temperature of 600 DEG C, the most again with shaping under 150MPa pressure in mould, then at Sintering 1 hour at 1250 DEG C, then divide the two-stage to lower the temperature, the cooling rate of first stage is maintained at 3.5 DEG C/min, in temperature Temper when dropping to 450 DEG C, then naturally cools to immerse oil temperature oil immersion in the deep fat of 130 DEG C when 200 ± 20 DEG C；Survey The hardness of the present embodiment bearing surface averagely can reach 350-362HB, temperature at 350 DEG C, the coefficient of friction after 12 hours Still less than 0.1, thermal coefficient of expansion is down to 1.12 × 10-6/℃。
Below it is only that inventive feature implements example, scope is not constituted any limitation.All employings are same The technical scheme replaced Deng exchange or equivalence and formed, within the scope of all falling within rights protection of the present invention.

Claims (2)

1. the preparation method of the sliding bearing that a thermal coefficient of expansion is low, it is characterised in that: include step in detail below:
1) batch mixing, makes grain diameter averagely less than 8 microns by regrinding after following dusty material mixing by weight percentage Powder: graphite 0.2-0.7%, aluminium oxide 0.01-0.03%, holmium 0.001-0.002%, chromium 0.1-0.15%, molybdenum bisuphide 0.2-0.3%, bismuth 0.01-0.05%, copper 0.3-0.5%, boron 0.02-0.03%, zinc stearate 0.3-0.45%, surplus For ferrum；
2) compacting, uses the mode that one or many is filled, and in mould, the pressure with 600-750MPa suppresses the 130-260 second Molding；
3) sintering, first presintering 1-2 hour at a temperature of 600-800 DEG C, the most again with 150-200MPa pressure in mould Lower shaping, sinters 1-3 hour at 1100-1250 DEG C, then divides the two-stage to lower the temperature, and the cooling rate of first stage keeps At 2.5-3.5 DEG C/min, drop to temper when 400-450 DEG C at temperature, then naturally cool to leaching when 200 ± 20 DEG C Enter oil temperature oil immersion in the deep fat of 110-130 DEG C.
The preparation method of the sliding bearing that thermal coefficient of expansion the most according to claim 1 is low, it is characterised in that: step 1) In, the most each blend ingredients is: graphite 0.2%, aluminium oxide 0.01%, holmium 0.001%, chromium 0.15%, two sulfur Changing molybdenum 0.25%, bismuth 0.01%, copper 0.3%, boron 0.02%, zinc stearate 0.45%, surplus is ferrum.
CN201610732470.6A 2016-08-27 2016-08-27 The preparation method of the sliding bearing that a kind of thermal coefficient of expansion is low Pending CN106086687A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107824780A (en) * 2017-10-20 2018-03-23 广西银英生物质能源科技开发股份有限公司 Powder metallurgy material for bearing and preparation method thereof
CN108883472A (en) * 2016-03-04 2018-11-23 大冶美有限公司 Cu base sintered sliding material and its manufacturing method
US10745780B2 (en) 2014-09-04 2020-08-18 Diamet Corporation Cu-based sintered bearing and production method for Cu-based sintered bearing

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102974825A (en) * 2012-11-22 2013-03-20 浙江明磊工具实业有限公司 Manufacturing method of drill bit
CN102996638A (en) * 2012-11-22 2013-03-27 宁波市群星粉末冶金有限公司 Ceramimetallurgical oil-free lubrication bearing
CN102994879A (en) * 2012-11-22 2013-03-27 宁波市群星粉末冶金有限公司 Ceramimetallurgical oil-free lubrication bearing and manufacturing method thereof
CN103008643A (en) * 2012-11-22 2013-04-03 宁波市群星粉末冶金有限公司 Method for manufacturing oil-free lubrication bearing for powder metallurgy

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102974825A (en) * 2012-11-22 2013-03-20 浙江明磊工具实业有限公司 Manufacturing method of drill bit
CN102996638A (en) * 2012-11-22 2013-03-27 宁波市群星粉末冶金有限公司 Ceramimetallurgical oil-free lubrication bearing
CN102994879A (en) * 2012-11-22 2013-03-27 宁波市群星粉末冶金有限公司 Ceramimetallurgical oil-free lubrication bearing and manufacturing method thereof
CN103008643A (en) * 2012-11-22 2013-04-03 宁波市群星粉末冶金有限公司 Method for manufacturing oil-free lubrication bearing for powder metallurgy

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10745780B2 (en) 2014-09-04 2020-08-18 Diamet Corporation Cu-based sintered bearing and production method for Cu-based sintered bearing
CN108883472A (en) * 2016-03-04 2018-11-23 大冶美有限公司 Cu base sintered sliding material and its manufacturing method
CN108883472B (en) * 2016-03-04 2020-08-18 大冶美有限公司 Cu-based sintered sliding material and method for producing same
US10941465B2 (en) 2016-03-04 2021-03-09 Diamet Corporation Cu-based sintered sliding material, and production method therefor
CN107824780A (en) * 2017-10-20 2018-03-23 广西银英生物质能源科技开发股份有限公司 Powder metallurgy material for bearing and preparation method thereof

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Application publication date: 20161109