CN103447545B - Method for preparing iron-based friction material by utilizing vacuum carbothermal in-situ reactive sintering from vanadium-titanium magnetite - Google Patents
Method for preparing iron-based friction material by utilizing vacuum carbothermal in-situ reactive sintering from vanadium-titanium magnetite Download PDFInfo
- Publication number
- CN103447545B CN103447545B CN201310361540.8A CN201310361540A CN103447545B CN 103447545 B CN103447545 B CN 103447545B CN 201310361540 A CN201310361540 A CN 201310361540A CN 103447545 B CN103447545 B CN 103447545B
- Authority
- CN
- China
- Prior art keywords
- powder
- iron
- friction material
- vacuum
- based friction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 53
- 239000002783 friction material Substances 0.000 title claims abstract description 47
- 238000005245 sintering Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 43
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000011065 in-situ storage Methods 0.000 title abstract description 16
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 title abstract 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000000843 powder Substances 0.000 claims abstract description 41
- 238000000498 ball milling Methods 0.000 claims abstract description 38
- 239000012141 concentrate Substances 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000000314 lubricant Substances 0.000 claims abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 21
- 229910052720 vanadium Inorganic materials 0.000 claims description 16
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 16
- 238000005056 compaction Methods 0.000 claims description 15
- 238000009413 insulation Methods 0.000 claims description 12
- 238000010792 warming Methods 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 10
- XIVNZHXRIPJOIZ-UHFFFAOYSA-N octadecanoic acid;zinc Chemical compound [Zn].CCCCCCCCCCCCCCCCCC(O)=O XIVNZHXRIPJOIZ-UHFFFAOYSA-N 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 9
- 230000014759 maintenance of location Effects 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 9
- 150000001298 alcohols Chemical class 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 19
- 239000011812 mixed powder Substances 0.000 abstract description 9
- 239000000203 mixture Substances 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 6
- 238000003825 pressing Methods 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 238000007731 hot pressing Methods 0.000 abstract description 4
- 238000003786 synthesis reaction Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004663 powder metallurgy Methods 0.000 abstract description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 abstract description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 abstract 1
- 238000001272 pressureless sintering Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 10
- 238000000227 grinding Methods 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 5
- 239000000470 constituent Substances 0.000 description 4
- 238000000280 densification Methods 0.000 description 4
- 230000003796 beauty Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
The invention discloses a method for preparing an iron-based friction material by utilizing vacuum carbothermal in-situ reactive sintering from a vanadium-titanium magnetite. The method comprises the following steps of firstly carrying out ball-milling on and uniformly mixing vanadium-titanium magnetite concentrate powder and graphite powder which is utilized as a reducing agent, secondly carrying out vacuum carbothermal pre-reduction on the mixed powder, thirdly carrying out secondary ball-milling on and uniformly mixing the pre-reduced mixed powder, iron powder, graphite powder as a lubricating agent, copper powder, tin powder, lead powder and zinc stearate powder, fourthly carrying out cold-pressing on the mixture to form pressed blanks, and finally placing the pressed blanks in a vacuum sintering furnace to sinter to obtain the iron-based friction material. Because the invention utilizes the technical scheme of the combination of vacuum pre-reduction, cold-pressing and vacuum pressureless sintering, without hot-pressing sintering conditions, the iron-based friction material is prepared from natural vanadium-titanium magnetite concentrate powder; therefore, the blank that the iron-based friction material is prepared by utilizing a vacuum carbothermal in-situ reactive sintering method without the hot-pressing sintering conditions is filled up, the prepared material has the advantages of in-situ synthesis and powder metallurgy technology, and the material preparation can be realized based on the vacuum sintering furnace so that the investment cost of devices is largely reduced.
Description
Technical field
The invention belongs to the preparing technical field of iron-based friction material, be specifically related to a kind of method utilizing vanadium titano-magnetite vacuum carbon hot in-place reaction-sintered to prepare iron-based friction material.
Background technology
Along with the development of modern industry, iron-based friction material because of its have high temperature resistant, intensity is high, the advantage such as inexpensive, in the clutch being widely used in aircraft, tank, automobile, boats and ships, tractor, engineering machinery and lathe etc. or brake.Iron-based friction material is primarily of Iron and Iron Alloy matrix, kollag, rubbing agent three part composition.Matrix composition is based on iron, and the alloying of iron can reduce the plasticity of iron, improves intensity, hardness, high-temperature capability, non-oxidizability; Lubricant component can improve seizure resistance, improves the wearability of material; Rubbing agent can improve material friction coefficient, reduces scratch and the wearing and tearing on antithesis surface.
Commercial iron-based friction material great majority adopt the preparation of " outer addition " powder metallurgical technique at present, namely with fine chemistry industry powder for raw material (cost is higher), according to the composition proportion of design, each component powder is sampled, obtains material through operations such as mixing, compacting, sintering.Rubbing agent in " outer addition " adopts synthetic powder as raw material.This technique mainly improves the performance of material by sintering densification, the general chemical reaction not forming novel substance occurs, its major defect is: all components are additional, easily interface pollution is there is between these constituent element and matrixes, easily occur in conjunction with bad because of the wetability difference between them, so that constituent element from matrix stripping out, has a strong impact on result of use in friction process.
Situ synthesis techniques is the effective ways preparing metal-base composites that the eighties in 20th century, Later development got up, and it utilizes two or more component to react to each other in the base generation wild phase.Compared with " outer addition ", situ synthesis techniques has the following advantages: generating phase factor is generated in-situ thermodynamically stable phase in the base, and surface no-pollution, avoids the problem with matrix non-wetting, be combined into metallurgical binding with matrix, combines well; Generate phase size and distribute more easy to control, and quantity can adjust in the larger context.
Reaction sintering based on powder metallurgy is a class important in in-situ synthesis, its material constituent element composition not only with powder metallurgic method can adjust flexibly with control, can the advantage such as newly net forming, also there is the above-mentioned advantage of fabricated in situ simultaneously.The existing composite utilizing fabricated in situ to prepare mainly contains TiC/Fe, SiC/Fe, VC/Fe composite etc.The method preparing iron-based friction material is sintered as ZL201210256454.6 discloses a kind of vanadium titano-magnetite reaction in-situ that utilizes.The method is by v-ti magnetite concentrate powder, reducing agent graphite powder, iron powder, lubricant graphite powder, copper powder, glass putty, lead powder, stearic acid zinc powder is by certain mol ratio weighing, then the graphite powder of v-ti magnetite concentrate powder and reducing agent is placed in ball mill to mix, then the graphite powder adding iron powder, copper powder, glass putty, lead powder, zinc stearate and lubricant continues ball milling and to be uniformly mixed powder; Mixed powder is made pressed compact through colding pressing, and is positioned in vacuum hotpressing stove by pressed compact, under sintering pressure is 0.5 ~ 2Mpa, sinter with heating rate 10 ~ 15 DEG C/min, sintering temperature is 1000 ~ 1200 DEG C, and temperature retention time is 2 ~ 4h.Though the blank that reaction in-situ sintering prepares iron-based friction material has been filled up in this invention, make the material of acquisition have the advantage of fabricated in situ and PM technique, and preparation technology is easy, has greatly shortened the manufacturing cycle of material, cost-saving.But blemish in an otherwise perfect thing is the iron-based friction material that hot pressed sintering function that technical scheme disclosed in ZL201210256454.6 must depend on vacuum hotpressing stove just can obtain denseization, the existence of vacuum sintering funace is made to become the prerequisite condition of this technical scheme enforcement, cause preparation condition harsh, equipment investment is large.For how both not have still to utilize vacuum carbon hot in-place reaction sintering to prepare iron-based friction material under hot pressed sintering condition, and the information of the iron-based friction material that densification degree matches in excellence or beauty with it can also be obtained, also there is no bibliographical information at present.
Summary of the invention
The object of the invention is for prior art Problems existing, a kind of method utilizing vanadium titano-magnetite vacuum carbon hot in-place reaction-sintered to prepare iron-based friction material is provided, the method can be prepared not possessing under hot pressed sintering condition, and can obtain the iron-based friction material that densification degree and prior art match in excellence or beauty.
The method utilizing vanadium titano-magnetite vacuum carbon hot in-place reaction-sintered to prepare iron-based friction material provided by the invention, it is characterized in that the processing step of the method and condition as follows:
(1) be 200 ~ 300 object v-ti magnetite concentrate powder, reducing agent graphite powder, iron powder, lubricant graphite powder, copper powder, glass putty, lead powder by granularity, stearic acid zinc powder carries out weighing respectively with the mol ratio of 1:1.69:0.7 ~ 2.65:0.87 ~ 2.69:0 ~ 0.14:0 ~ 0.04:0 ~ 0.03:0.002 ~ 0.004;
(2) the v-ti magnetite concentrate powder after weighing and reducing agent graphite powder are first placed in ball mill ball milling to mix, then the compound after mixing is warming up to 1240 ~ 1290 DEG C with heating rate 8 ~ 12 DEG C/min in vacuum sintering furnace, insulation 1 ~ 4h carries out the hot prereduction of vacuum carbon, obtains prereduction powder;
(3) first prereduction powder and the good iron powder of (1) step weighing, copper powder, glass putty, lead powder are placed in ball mill to carry out secondary ball milling and be mixed to evenly, and then lubricant graphite powder good for (1) step weighing and stearic acid zinc powder added continue ball milling and be mixed to evenly, add suitable alcohols during ball milling;
(4) first secondary ball milling compound is loaded in mould, the pressed compact that relative density is 80 ~ 90% is made through cold compaction, the pressure of cold compaction is 300 ~ 500MPa, then pressed compact is sintered in vacuum sintering furnace with heating rate 8 ~ 12 DEG C/min, sintering temperature is 1100 ~ 1240 DEG C, and temperature retention time is 2 ~ 4h.
Granularity preferably 200 ~ 250 orders of the v-ti magnetite concentrate powder that above method is used.
Heating rate preferably 8 ~ 10 DEG C/min of above method (2) step, pre-reduction temperature preferably 1260 ~ 1290 DEG C, temperature retention time is 2 ~ 3h preferably.
The pressed compact relative density made of above method (4) step cold compaction preferably 85 ~ 90%, the pressure preferably 400 ~ 500MPa of cold compaction.
Heating rate preferably 8 ~ 10 DEG C/min of above method (4) step, sintering temperature preferably 1150 ~ 1220 DEG C, temperature retention time is 2 ~ 3h preferably.
The present invention is with natural minerals---v-ti magnetite concentrate powder is base stock, appropriate graphite powder is added for twice in composition proportion, first time, added graphite was as reducing agent, ferriferous oxide in carbon reduction vanadium titano-magnetite can be realized obtain iron matrix in vacuum pre-reduction, TiO in carbon and vanadium titano-magnetite can be realized again
2, V
2o
5reaction in-situ obtains TiC, VC hard phase rubbing agent.The added graphite of second time is as the lubricant component in iron-based friction material.And Co, Ni of association can be used as the alloy element of iron-based body in vanadium titano-magnetite, the SiO of association
2, A1
20
3, MgO can be used as the rubbing agent of iron-based friction material and remains.
The present invention compared with prior art, has the following advantages:
1, adopt reaction in-situ sintering method to prepare iron-based friction material because the present invention is not only, what also directly utilize is v-ti magnetite resource---the v-ti magnetite concentrate of China's abundant, and be to adopt the technical scheme of vacuum prereduction+cold pressing+vacuum non-pressure sintering to achieve the preparation of iron-based friction material under hot pressed sintering condition not possessing, thus filled up and do not had under hot pressed sintering condition, to utilize vacuum carbon hot in-place reaction sintering to prepare the blank of iron-based friction material, take full advantage of the v-ti magnetite resource of China's abundant, have also obtained the iron-based friction material that density and prior art match in excellence or beauty.
2, because the present invention adopts " vacuum prereduction+cold pressing+vacuum non-pressure sintering " to achieve the sintering densification process of in-situ synthesized reaction and powder metallurgy, thus the iron-based friction material of acquisition is not only made to have the advantage of fabricated in situ and PM technique, and just can realize iron-based friction material preparation based on vacuum sintering furnace, greatly can save equipment investment cost.
Accompanying drawing explanation
Fig. 1 is the X-ray diffractogram of iron-based friction material prepared by the embodiment of the present invention 1.
Fig. 2 is the X-ray diffractogram of iron-based friction material prepared by the embodiment of the present invention 2.
Fig. 3 is the X-ray diffractogram of iron-based friction material prepared by the embodiment of the present invention 3.
Fig. 4 is the X-ray diffractogram of iron-based friction material prepared by the embodiment of the present invention 4.
Fig. 5 is the X-ray diffractogram of iron-based friction material prepared by the embodiment of the present invention 5.
Can find out from above X-ray diffractogram and all generate constituent element required for iron-based friction material through the inventive method reaction in-situ.
Detailed description of the invention
Embodiment given below is specifically described the present invention and further illustrates; can not be interpreted as limiting the scope of the invention, some nonessential improvement that the person skilled in the art in this field makes the present invention according to the invention described above content and adjustment still belong to protection scope of the present invention.
What deserves to be explained is, the coefficient of friction of the iron-based friction material prepared by following examples measures according to JB/T7269-1994; Density measures according to GB/T10421-2002; Apparent hardness measures according to GB/T231.1-2002; Cross-breaking strength measures according to GB/T5319-2002.
Embodiment 1
Be 200 order v-ti magnetite concentrate powder 100g(molal quantitys 1 by granularity) and reducing agent graphite powder 20.28g(molal quantity 1.69) put into ball mill, Ceramic Balls is added by ratio of grinding media to material 2:1, then ball milling mixing 3h under rotating speed 200rpm, inserted in vacuum sintering furnace by ball milling compound and be warming up to 1290 DEG C with heating rate 8 DEG C/min, insulation 2h carries out the hot prereduction of vacuum carbon; First by vacuum prereduction powder and iron powder 73.36g(molal quantity 1.31), copper powder 8.96g(molal quantity 0.14), glass putty 2.38g(molal quantity 0.02), lead powder 2.07g(molal quantity 0.01) and appropriate alcohol put into ball mill, continue by ratio of grinding media to material 2:1 ball milling mixing 3h under rotating speed 300rpm, then lubricant graphite powder 10.44g(molal quantity 0.87 is added) and stearic acid zinc powder 1.90g(molal quantity 0.003) continue ball milling evenly, discharging; First loaded in mould by secondary ball milling mixed powder, under 300MPa pressure, cold compaction makes the pressed compact that relative density is 87%, then pressed compact is placed in vacuum sintering furnace, is warming up to 1150 DEG C with heating rate 10 DEG C/min, and insulation 3h sinters.
The coefficient of friction of iron-based friction material prepared by the present embodiment is 0.32, and wear rate is 4.9 × 10
-7cm
3/ J, density is 4.2g/cm
3, apparent hardness is 45HB, and cross-breaking strength is 59N/mm
2.
Embodiment 2
Be 300 order v-ti magnetite concentrate powder 100g(molal quantitys 1 by granularity) and reducing agent graphite powder 20.28g(molal quantity 1.69) put into ball mill, Ceramic Balls is added by ratio of grinding media to material 2:1, then ball milling mixing 3h under rotating speed 200rpm, inserted in vacuum sintering furnace by ball milling compound and be warming up to 1290 DEG C with heating rate 10 DEG C/min, insulation 2h carries out the hot prereduction of vacuum carbon; First by vacuum prereduction powder and iron powder 73.36g(molal quantity 1.31), copper powder 8.96g(molal quantity 0.14), glass putty 2.38g(molal quantity 0.02), lead powder 2.07g(molal quantity 0.01) and appropriate alcohol put into ball mill, continue by ratio of grinding media to material 2:1 ball milling mixing 3h under rotating speed 300rpm, then lubricant graphite powder 10.44g(molal quantity 0.87 is added) and stearic acid zinc powder 1.90g(molal quantity 0.003) continue ball milling evenly, discharging; First loaded in mould by secondary ball milling mixed powder, under 300MPa pressure, cold compaction makes the pressed compact that relative density is 80%, then pressed compact is placed in vacuum sintering furnace, is warming up to 1200 DEG C with heating rate 8 DEG C/min, and insulation 2h sinters.
The coefficient of friction of iron-based friction material prepared by the present embodiment is 0.27, and wear rate is 4.4 × 10
-7cm
3/ J, density is 4.8g/cm
3, apparent hardness is 30HB, and cross-breaking strength is 57N/mm
2.
Embodiment 3
Be 250 order v-ti magnetite concentrate powder 100g(molal quantitys 1 by granularity) and reducing agent graphite powder 20.28g(molal quantity 1.69) put into ball mill, Ceramic Balls is added by ratio of grinding media to material 2:1, then ball milling mixing 2h under rotating speed 400rpm, inserted in vacuum sintering furnace by ball milling compound and be warming up to 1260 DEG C with heating rate 9 DEG C/min, insulation 1h carries out the hot prereduction of vacuum carbon; First by vacuum prereduction powder and iron powder 39.2g(molal quantity 0.7), glass putty 4.76g(molal quantity 0.04), lead powder 2.07g(molal quantity 0.01) and appropriate alcohol put into ball mill, continue by ratio of grinding media to material 2:1 ball milling mixing 2h under rotating speed 350rpm, then lubricant graphite powder 18.49g(molal quantity 1.54 is added) and stearic acid zinc powder 1.26g(molal quantity 0.002) continue ball milling evenly, discharging; First loaded in mould by secondary ball milling mixed powder, under 400MPa pressure, cold compaction makes the pressed compact that relative density is 90%, then pressed compact is placed in vacuum sintering furnace, is warming up to 1100 DEG C with heating rate 12 DEG C/min, and insulation 4h sinters.
The coefficient of friction of iron-based friction material prepared by the present embodiment is 0.27, and wear rate is 3.8 × 10
-7cm
3/ J, density is 5.2g/cm
3, apparent hardness is 70HB, and cross-breaking strength is 68N/mm
2.
Embodiment 4
Be 230 order v-ti magnetite concentrate powder 100g(molal quantitys 1 by granularity) and reducing agent graphite powder 20.28g(molal quantity 1.69) put into ball mill, Ceramic Balls is added by ratio of grinding media to material 2:1, then ball milling mixing 3h under rotating speed 200rpm, inserted in vacuum sintering furnace by ball milling compound and be warming up to 1270 DEG C with heating rate 12 DEG C/min, insulation 3h carries out the hot prereduction of vacuum carbon; First by vacuum prereduction powder and iron powder 39.2g(molal quantity 0.7), glass putty 4.76g(molal quantity 0.04) and appropriate alcohol put into ball mill, continue by ratio of grinding media to material 2:1 ball milling mixing 3h under rotating speed 300rpm, then lubricant graphite powder 18.49g(molal quantity 1.54 is added) and stearic acid zinc powder 1.26g(molal quantity 0.002) continue ball milling evenly, discharging; First loaded in mould by secondary ball milling mixed powder, under 450MPa pressure, cold compaction makes the pressed compact that relative density is 85%, then pressed compact is placed in vacuum sintering furnace, is warming up to 1220 DEG C with heating rate 9 DEG C/min, and insulation 2h sinters.
The coefficient of friction of iron-based friction material prepared by the present embodiment is 0.27, and wear rate is 3.5 × 10
-7cm
3/ J, density is 5.6g/cm
3, apparent hardness is 90HB, and cross-breaking strength is 75N/mm
2.
Embodiment 5
Be 200 order v-ti magnetite concentrate powder 100g(molal quantitys 1 by granularity) and reducing agent graphite powder 20.28g(molal quantity 1.69) put into ball mill, Ceramic Balls is added by ratio of grinding media to material 2:1, then ball milling mixing 3h under rotating speed 200rpm, inserted in vacuum sintering furnace by ball milling compound and be warming up to 1240 DEG C with heating rate 10 DEG C/min, insulation 4h carries out the hot prereduction of vacuum carbon; First by vacuum prereduction powder and iron powder 148.4g(molal quantity 2.65), copper powder 5.12g(molal quantity 0.08), lead powder 6.21g(molal quantity 0.03) and appropriate alcohol put into ball mill, continue by ratio of grinding media to material 2:1 ball milling mixing 2h under rotating speed 350rpm, then lubricant graphite powder 32.28g(molal quantity 2.69 is added) and stearic acid zinc powder 2.53g(molal quantity 0.004) continue ball milling evenly, discharging; First loaded in mould by secondary ball milling mixed powder, under 500MPa pressure, cold compaction makes the pressed compact that relative density is 81%, then pressed compact is placed in vacuum sintering furnace, is warming up to 1240 DEG C with heating rate 8 DEG C/min, and insulation 2.5h sinters.
The coefficient of friction of iron-based friction material prepared by the present embodiment is 0.29, and wear rate is 4.7 × 10
-7cm
3/ J, density is 4.7g/cm
3, apparent hardness is 50HB, and cross-breaking strength is 62N/mm
2.
Claims (8)
1. utilize vanadium titano-magnetite vacuum carbon hot in-place reaction-sintered to prepare the method for iron-based friction material, it is characterized in that the processing step of the method and condition as follows:
(1) be 200 ~ 300 object v-ti magnetite concentrate powder, reducing agent graphite powder, iron powder, lubricant graphite powder, copper powder, glass putty, lead powder by granularity, stearic acid zinc powder carries out weighing respectively with the mol ratio of 1:1.69:0.7 ~ 2.65:0.87 ~ 2.69:0 ~ 0.14:0 ~ 0.04:0 ~ 0.03:0.002 ~ 0.004;
(2) the v-ti magnetite concentrate powder after weighing and reducing agent graphite powder are first placed in ball mill ball milling to mix, then the compound after mixing is warming up to 1240 ~ 1290 DEG C with heating rate 8 ~ 12 DEG C/min in vacuum sintering furnace, insulation 1 ~ 4h carries out the hot prereduction of vacuum carbon, obtains prereduction powder;
(3) first prereduction powder and the good iron powder of (1) step weighing, copper powder, glass putty, lead powder are placed in ball mill to carry out secondary ball milling and be mixed to evenly, and then lubricant graphite powder good for (1) step weighing and stearic acid zinc powder added continue ball milling and be mixed to evenly, add suitable alcohols during ball milling;
(4) first secondary ball milling compound is loaded in mould, the pressed compact that relative density is 80 ~ 90% is made through cold compaction, the pressure of cold compaction is 300 ~ 500MPa, then pressed compact is sintered in vacuum sintering furnace with heating rate 8 ~ 12 DEG C/min, sintering temperature is 1100 ~ 1240 DEG C, and temperature retention time is 2 ~ 4h.
2. the method utilizing vanadium titano-magnetite vacuum carbon hot in-place reaction-sintered to prepare iron-based friction material according to claim 1, is characterized in that granularity preferably 200 ~ 250 orders of the v-ti magnetite concentrate powder that the method is used.
3. the method utilizing vanadium titano-magnetite vacuum carbon hot in-place reaction-sintered to prepare iron-based friction material according to claim 1 and 2, the heating rate that it is characterized in that the method (2) step is 8 ~ 10 DEG C/min, pre-reduction temperature is 1260 ~ 1290 DEG C, and temperature retention time is 2 ~ 3h.
4. the method utilizing vanadium titano-magnetite vacuum carbon hot in-place reaction-sintered to prepare iron-based friction material according to claim 1 and 2, it is characterized in that the pressed compact relative density that the method (4) step cold compaction is made is 85 ~ 90%, the pressure of cold compaction is 400 ~ 500MPa.
5. the method utilizing vanadium titano-magnetite vacuum carbon hot in-place reaction-sintered to prepare iron-based friction material according to claim 3, it is characterized in that the pressed compact relative density that the method (4) step cold compaction is made is 85 ~ 90%, the pressure of cold compaction is 400 ~ 500MPa.
6. the method utilizing vanadium titano-magnetite vacuum carbon hot in-place reaction-sintered to prepare iron-based friction material according to claim 1 and 2, the heating rate that it is characterized in that the method (4) step is 8 ~ 10 DEG C/min, sintering temperature is 1150 ~ 1220 DEG C, and temperature retention time is 2 ~ 3h.
7. the method utilizing vanadium titano-magnetite vacuum carbon hot in-place reaction-sintered to prepare iron-based friction material according to claim 3, the heating rate that it is characterized in that the method (4) step is 8 ~ 10 DEG C/min, sintering temperature is 1150 ~ 1220 DEG C, and temperature retention time is 2 ~ 3h.
8. the method utilizing vanadium titano-magnetite vacuum carbon hot in-place reaction-sintered to prepare iron-based friction material according to claim 5, the heating rate that it is characterized in that the method (4) step is 8 ~ 10 DEG C/min, sintering temperature is 1150 ~ 1220 DEG C, and temperature retention time is 2 ~ 3h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310361540.8A CN103447545B (en) | 2013-08-19 | 2013-08-19 | Method for preparing iron-based friction material by utilizing vacuum carbothermal in-situ reactive sintering from vanadium-titanium magnetite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310361540.8A CN103447545B (en) | 2013-08-19 | 2013-08-19 | Method for preparing iron-based friction material by utilizing vacuum carbothermal in-situ reactive sintering from vanadium-titanium magnetite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103447545A CN103447545A (en) | 2013-12-18 |
| CN103447545B true CN103447545B (en) | 2015-07-15 |
Family
ID=49730603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310361540.8A Expired - Fee Related CN103447545B (en) | 2013-08-19 | 2013-08-19 | Method for preparing iron-based friction material by utilizing vacuum carbothermal in-situ reactive sintering from vanadium-titanium magnetite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103447545B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105986139B (en) * | 2015-03-04 | 2018-02-09 | 海南大学 | A kind of titanium carbide ceramic and preparation method thereof |
| CN109385567B (en) * | 2018-10-23 | 2020-06-23 | 四川工程职业技术学院 | Method for preparing diffusion self-lubricating metal ceramic sintered body by using vanadium titano-magnetite |
| CN109207785A (en) * | 2018-10-25 | 2019-01-15 | 四川工程职业技术学院 | A method of high temperature sweating self-lubricating composite is prepared with vanadium titano-magnetite |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102676796A (en) * | 2012-05-23 | 2012-09-19 | 北京矿冶研究总院 | Method for processing vanadium titano-magnetite |
| CN102732773A (en) * | 2012-07-24 | 2012-10-17 | 四川大学 | Method for preparing iron-based friction material by vanadium titano-magnetite in-situ reaction sintering |
| CN102787188A (en) * | 2011-05-20 | 2012-11-21 | 王洪东 | Process for smelting vanadium-containing pig iron by high-silicon vanadium titanomagnetite concentrate powder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009287677A (en) * | 2008-05-29 | 2009-12-10 | Nissan Motor Co Ltd | High friction material |
-
2013
- 2013-08-19 CN CN201310361540.8A patent/CN103447545B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787188A (en) * | 2011-05-20 | 2012-11-21 | 王洪东 | Process for smelting vanadium-containing pig iron by high-silicon vanadium titanomagnetite concentrate powder |
| CN102676796A (en) * | 2012-05-23 | 2012-09-19 | 北京矿冶研究总院 | Method for processing vanadium titano-magnetite |
| CN102732773A (en) * | 2012-07-24 | 2012-10-17 | 四川大学 | Method for preparing iron-based friction material by vanadium titano-magnetite in-situ reaction sintering |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103447545A (en) | 2013-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102094132B (en) | Method for preparing B4C-Al composite material | |
| CN109338199B (en) | Ceramic particle reinforced high-entropy alloy and preparation method thereof | |
| CN108823478A (en) | Ultra-fine high-entropy alloy Binder Phase cermet and preparation method thereof | |
| CN104164587B (en) | A kind of dispersed and strengthened copper-based composite material of densification | |
| CN110218928B (en) | High-strength and high-toughness Mo2FeB2Base cermet and method for preparing same | |
| CN102787267A (en) | Multiple boride metal ceramic based on high-entropy alloy adhesion agent and preparation method thereof | |
| CN105463291A (en) | Fully-prealloyed powder and preparation method thereof | |
| CN108706973B (en) | Preparation method of high-strength high-thermal-conductivity graphite material | |
| CN101824574A (en) | Method for preparing extra-coarse grained carbide alloy | |
| CN103464764B (en) | Metal matrix wear-resistant corrosion-resistant surface coating composite and preparation method thereof | |
| CN103741000A (en) | Ultra-fine crystal gradient alloy with rich-cobalt surface and preparation method thereof | |
| CN106011581A (en) | Vanadium-containing non-magnetic Ti(C, N)-based metal ceramic and preparation method thereof | |
| CN101967577B (en) | Method for preparing tungsten-based alloy | |
| CN103447545B (en) | Method for preparing iron-based friction material by utilizing vacuum carbothermal in-situ reactive sintering from vanadium-titanium magnetite | |
| CN102732773B (en) | Method for preparing iron-based friction material by vanadium titano-magnetite in-situ reaction sintering | |
| CN101362204B (en) | Preparation method of tungsten billet for rolled plate | |
| CN104451325B (en) | Process for preparing Mo2FeB2-based metal ceramic | |
| CN106244852B (en) | A kind of Ti 8Si alloys of Zr alloyings and preparation method thereof | |
| CN101525716B (en) | Iron aluminide intermetallic compound-titanium diboride composite material and preparation method thereof | |
| CN103422005B (en) | A kind of method utilizing vanadium titano-magnetite carbon hot in-place reaction sintering to prepare iron-based friction material | |
| CN102031411B (en) | Method for preparing compact W-Cu composite material at low temperature | |
| CN104531999A (en) | Method for preparing vanadium-nitrogen alloy | |
| CN110106419A (en) | A kind of device and method preparing composite material of molybdenum and copper | |
| CN103934453B (en) | Utilize the method for modified metal power forging gasoline engine connecting rod blank | |
| CN115259859B (en) | Boron carbide bulletproof ceramic material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |