CN1931478A - Molybdenum base cermet containing SiC, Fe, C and Cr - Google Patents
Molybdenum base cermet containing SiC, Fe, C and Cr Download PDFInfo
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- CN1931478A CN1931478A CN 200610069828 CN200610069828A CN1931478A CN 1931478 A CN1931478 A CN 1931478A CN 200610069828 CN200610069828 CN 200610069828 CN 200610069828 A CN200610069828 A CN 200610069828A CN 1931478 A CN1931478 A CN 1931478A
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Abstract
The Mo base cermets containing SiC, Fe, C and Cr is prepared through crushing Mo, SiC, Fe, C and Cr powder to size thinner than 0.5 micron, pressing into compact and sintering to form. The Mo base cermets containing SiC, Fe, C and Cr has hardness and wear resistance higher than common ferromolybdenum material and impact toughness higher than SiC ceramic material. The preparation process includes the steps of ball milling to crush, pressing in mold to form and sintering at no-oxygen condition.
Description
One, technical field
The invention belongs to the cermet material field, particularly relate to the molybdenum-based cermet material of a kind of silicon carbide-containing, iron, carbon, chromium.
Two, background technology
Silicon carbide ceramics has high hardness and wearability, but toughness is relatively poor, is easy to fragmentation when being hit.Adopt the silicon carbide ceramics of crystal grain thinning technology and increase density technology, toughness is improved, but with respect to metal material, its toughness index also differs greatly.United States Patent (USP) 20030167969 discloses the cermet of a kind of polynary pottery and metallic combination, and the excellent toughness of metal component can be arranged, and the high rigidity and the high-wearing feature of ceramic material can be arranged again.But it is different that polynary pottery requires sintering temperature separately, brings difficulty to sintering process.Chinese patent 92114875.5 discloses a kind of from spreading the cermet of sintering, but adopts from the technology that spreads sintering industrial applications in a large number.
Three, summary of the invention
In order to overcome the hardness and the not high enough shortcoming of wearability of silicon carbide ceramics impact toughness low and molybdenum and iron material, the invention provides the molybdenum-based cermet material of a kind of silicon carbide-containing, iron, carbon, chromium.
The present invention utilizes molybdenum, iron, carbon, chromium element reacting to each other in sintering, forms the compound and the solid solution of molybdenum, iron, carbon, chromium.Can obtain hardness and be higher than common metal, and fragility is far below the material of pottery.Utilize the phase transformation characteristics of metal solid solution, can improve mechanical property by heat treatment.With the compound and the ceramic combination of molybdenum, iron, carbon, chromium,, can obtain impact toughness height, hardness height and the good cermet of wearability through rational heat treatment.
The technical solution adopted in the present invention is: the characteristic that molybdenum, iron, carbon, evanohm had is combined with the characteristic of silicon carbide ceramics, and both learn from other's strong points to offset one's weaknesses mutually, can obtain that impact toughness is higher, hardness is higher, wearability preferred metal pottery.By the solubility of heat treatment change solid solution, improve the hardness and the wearability of alloy thing phase.Adopt the powder stock of aluminium, iron, carbon, chromium, carborundum, mix by a certain percentage,, then sintered body is heat-treated by ball milling, pressed compact and thermal sintering to powder.
Concrete preparation technology is as follows:
(1) batching and mix
Commercially pure molybdenum, iron, carbon, chromium, carborundum powder powder stock are mixed by a certain percentage the concrete ratio range of material powder following (percentage by weight):
SiC 9～50％
Fe 10～45％
Mo 40～80％
C 0.3～1％
Al 0.3～3％
Cr 5～10％
In the prescription with SiC 35～55%; Fe 15～20%; Mo 43～60%; C 0.5～0.8%; Al 0.5～2%; Mechanical property the best during Cr 6～7% scopes.
Aluminium in the above-mentioned prescription, chromium are sintering agent and effect with the aspects such as grain growth of drawing up; The adding of molybdenum can obviously improve the material impact toughness; Iron can form solid solution and alloy cpd with other element that adds, and helps the raising of intensity and impact toughness index; Carborundum can improve the hardness and the wearability of material.
(2) powder process
The mill jar of mixed powder being put into ball mill carries out ball milling.The ball milling time is different and different according to the granularity of starting powder, generally at 4～6 hours.The granularity of powder can be used after less than 0.5 μ m.
(3) pressed compact
The powder that mill is good adds 5% animal gelatine as interim forming agent, makes pressed compact by mold pressing.
(4) thermal sintering
Under oxygen free condition pressed compact is heated to 1600～1900 ℃ of scopes and carries out sintering, the temperature retention time during sintering is relevant with the size of pressed compact size, and general insulation is 3～5 hours.Cool off with the stove cooling behind the sintering.
Outstanding effect of the present invention is: the molybdenum-based cermet hardness and the wearability of silicon carbide-containing, iron, carbon, chromium is higher than iron, molybdenum is an alloy, and impact toughness is higher than silicon carbide ceramics.After heat treatment, wherein the hardness and the wearability of middle solid solution are improved metal mutually.The distribution of carborundum phase is comparatively even, makes material have high antiwear property, and the toughness of being apt to material is received in the existence mutually of iron and molybdenum.
Cermet of the present invention is mainly used in the wear-resisting and shock resistance member under the etching condition, for example the elbow of the housing of slush pump and impeller, chemical industry equipment mesohigh pipeline, the wear member of ocean machinery etc. under the corrosive environment.
Four, the specific embodiment
Embodiment 1
Commercially pure iron, molybdenum, carbon, boron, Zirconium dioxide powder raw material are carried out proportioning and mixing, concrete proportioning following (percentage by weight):
SiC 21％
Fe 13％
Mo 60％
C 0.4％
Al 0.6％
Cr 5％
Utilize the pendulum-type ball mill that above-mentioned powder is carried out ball milling.Powder particle size less than 0.5 μ m after, add 5% animal gelatine as interim forming agent, become pressed compact by mold pressing.Pressed compact is put into sintering furnace be heated to 1600 ℃, be incubated 3 hours, come out of the stove after being chilled to room temperature with stove.
Embodiment 2
Powder stock carries out proportioning and mixing with embodiment 1, concrete proportioning following (percentage by weight):
SiC 30％
Fe 30％
Mo 30％
C 0.5％
Al 0.5％
Cr 9％
All the other processes are identical with embodiment 1, and difference is that sintering temperature is 1800 ℃, is incubated 4 hours.
Embodiment 3
The same routine embodiment 1 of powder stock carries out proportioning and mixing, concrete proportioning following (percentage by weight):
SiC 40％
Fe 24％
Mo 30％
C 0.7％
Al 0.3％
Cr 5％
All the other processes are identical with embodiment 1, and difference is that sintering temperature is 1900 ℃, is incubated 2 hours.
Claims (2)
1. the molybdenum-based cermet material of a silicon carbide-containing, iron, carbon, chromium is characterized by this ceramic-metallic proportioning and is (percentage by weight): SiC 9～50%; Fe 10～45%; Mo 40～80%; C 0.3～1%; Al 0.3～3%; Cr 5～10%.
2. according to claim 1, the molybdenum-based cermet material of silicon carbide-containing, iron, carbon, chromium is characterized in that the best proportioning of this cermet material is (percentage by weight): SiC 35～55%; Fe 15～20%; Mo 43～60%; C 0.5～0.8%; Al 0.5～2%; Cr 6～7%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100698288A CN100484661C (en) | 2006-08-16 | 2006-08-16 | Molybdenum base cermet containing SiC, Fe, C and Cr |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100698288A CN100484661C (en) | 2006-08-16 | 2006-08-16 | Molybdenum base cermet containing SiC, Fe, C and Cr |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1931478A true CN1931478A (en) | 2007-03-21 |
| CN100484661C CN100484661C (en) | 2009-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100698288A Expired - Fee Related CN100484661C (en) | 2006-08-16 | 2006-08-16 | Molybdenum base cermet containing SiC, Fe, C and Cr |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108963262A (en) * | 2018-07-19 | 2018-12-07 | 合肥连森裕腾新材料科技开发有限公司 | A kind of amendatory metal matrix ceramic composites of conductivity |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1003718B (en) * | 1987-10-12 | 1989-03-29 | 冶金工业部钢铁研究总院 | Molybdenum-based metal ceramic die material for hot rolling |
| RU2084425C1 (en) * | 1992-12-30 | 1997-07-20 | Государственный научно-исследовательский институт конструкционных материалов на основе графита | Method of manufacturing articles from carbon-silicon carbide composite material and carbon-silicon carbide composite material |
| CN1046317C (en) * | 1992-12-31 | 1999-11-10 | 北京科技大学 | Technique for mfg. cermet |
| WO1994021835A1 (en) * | 1993-03-23 | 1994-09-29 | Krupp Widia Gmbh | Cermet and method of producing it |
| CN1133603C (en) * | 2001-11-07 | 2004-01-07 | 华中科技大学 | Composite cermet and its preparing process |
| CN1180110C (en) * | 2002-12-02 | 2004-12-15 | 株洲硬质合金集团有限公司 | Metal ceramic and its preparation method |
| CN1260385C (en) * | 2002-12-05 | 2006-06-21 | 天津理工学院 | Silicide alloy-titanium carbide cermet |
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2006
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108963262A (en) * | 2018-07-19 | 2018-12-07 | 合肥连森裕腾新材料科技开发有限公司 | A kind of amendatory metal matrix ceramic composites of conductivity |
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| CN100484661C (en) | 2009-05-06 |
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Granted publication date: 20090506 Termination date: 20110816 |