CN1904116A - Particle cutting knife material and its preparation method - Google Patents
Particle cutting knife material and its preparation method Download PDFInfo
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- CN1904116A CN1904116A CN 200610041391 CN200610041391A CN1904116A CN 1904116 A CN1904116 A CN 1904116A CN 200610041391 CN200610041391 CN 200610041391 CN 200610041391 A CN200610041391 A CN 200610041391A CN 1904116 A CN1904116 A CN 1904116A
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Abstract
This invention relates to a material of grain cutting knife, and its process. The materials includes matrix martensitic stainless steel 96-98% and TiC2-4%. The TiC distributes in matrix stainless steel. The process includes prepare append stuff, smelting basis material, adding size reduction material, ingot casting slag, etc. The material can reunion TiC particles from matrix alloy and the TiC particles are well-distributed. The TiC particles form the stereoplasm phase which can boost the wear resistance greatly. Experiment has proved this material can still work when temperature is above100DEG C, and it can substitute sitaile alloy at low cost.
Description
Technical field
The present invention relates to a kind of composite stainless steel, especially a kind of hardened stainless steel that is used to make granules cut moving knife and so on cutter also relates to its preparation method simultaneously, belongs to the metal composite technical field.
Background technology
The cutting tool of granules cut moving knife that PET industry is used and so on is worked under water, changes difficulty, requires life cycle long, and the edge of a knife is sharp, wear-resistant, corrosion-resistant.At present, the edge of a knife material of this type of large-scale cutter mainly adopts the not good enough cobalt base alloy of machining property (being commonly called as Si Taile alloy STELLITE12#) built-up welding to form, promptly elder generation's circumference on the matrix steel is opened one group of groove along bus, follow built-up welding cobalt base alloy in groove, mill the body material between the adjacent built-up welding cobalt base alloy again, expose cobalt base alloy, at last at cobalt base alloy grinding cutting edge.Its manufacturing process complexity not only, and cost an arm and a leg because of containing the rare metal cobalt in the material (about 500 yuan/Kg).
Retrieval finds, application number is that to disclose a kind of be wear-resisting aluminum matrix composite and the preparation technology thereof who strengthens body with the titanium carbide granule for patent of invention that ZL99114272.1, name are called " titanium carbide reinforced antiwear aluminium alloy and preparation technology thereof ".Application number is ZL94111234.9, and it is wear resistant copper-based matrix material and the preparation technology thereof who strengthens body with the titanium carbide granule that the patent of invention that name is called " high-strength wear-resistant complex brass and preparation technology thereof " then discloses a kind of.Hence one can see that, and titanium carbide has rational action effect to the performance such as wear-resisting that strengthens metallic substance.Yet aluminium base or copper base metal obviously is not suitable as the material to fix a cutting tool.
Summary of the invention
The objective of the invention is to propose a kind of cost economy, corrosion-resistant, wear-resistant, intensity is high, impact-resistant particle cutting knife material, provides its preparation method simultaneously, thereby replace the Si Taile alloy, satisfy the needs that PET industry is cut under water.
In order to reach above purpose, the applicant passes through experiment screening repeatedly, solved that the matrix steel are determined, the compound TiC of going out particle in matrix alloy, and make the disperse of TiC uniform particles, select reasonable proportioning, draft a series of problems such as preparation method, determined following particle cutting knife material, this cutter material is grouped into by the one-tenth of following volume percent
Matrix Martensite Stainless Steel 96-98%
TiC 2-4％
Wherein TiC is with 10-10
2The nm disperse is distributed in the matrix stainless steel.The matrix stainless steel can be various Martensite Stainless Steels, and especially with 2Cr13 performance the best, and 2Cr13 accounts for 97vol%, cutting performance was best when TiC accounted for 3vol%.
Usually the stainless composition of matrix is:
C:0.1～0.34%; Cr:12～14%; Si≤0.60%; Ni≤0.60%; Mn :≤0.60%; S≤0.03%, surplus are Fe.
The preparation method of above cutter material is:
1) material---with Ti, C, Fe superfine grinding, particle diameter is less than 0.1 millimeter, to prepare interpolation;
2), melting body material---Martensite Stainless Steel is put into the melting equipment melting;
3), add that pulverised material---after the body material fusing, by above finished product proportion requirement, add and pulverize back Ti, C, Fe powder, temperature is controlled at 1800 ℃-2000 ℃, forms 10-10
2The disperse distribution TiC of nm;
4), ingot casting electroslag---high temperature electroslag behind the ingot casting, get rid of the ingot casting internal porosity.
After adopting the present invention, can be in matrix alloy compoundly go out the TiC particle, and make very even dispersion of TiC particle, form the hard phase in the material, thereby reach the purpose of strengthening material.Experiment showed, the granules cut moving knife operation under water made from the above TiC dispersion-strengthened stainless steel that is made of matrix alloy and 2-4vol%TiC, envrionment temperature is near 100 ℃, and is corrosion-resistant and mechanical property is all very good, and cost is more much lower than Si Taile alloy.
Embodiment
Embodiment one
In the present embodiment, the applicant plans to develop a kind of novel material-TiC dispersion-strengthened stainless steel, to substitute the high cobalt base alloy (being commonly called as Si Taile alloy STELLITE) of price, is used for granules cut moving knife.The technical problem underlying that triturating solves is as follows:
1. the matrix steel are determined: need not thermal treatment after the cobalt base alloy welding of the prior art, the edge of a knife can reach certain degree of hardness, and good corrosion resistance is wear-resistant, the intensity height, but with high costs.By experiment, selected the Martensite Stainless Steel such as 18-8 stainless steel, 1Cr13 stainless steel, 2Cr13 stainless steel, 3Cr13 stainless steel, 4Cr13 of good corrosion resistance.Wherein the most desirable with the experiment effect of 2Cr13.
2. the synthetic TiC particle of original position in the stainless steel steel melt: the base material of TiC particle strengthening material adopts the existing report of copper, aluminium or cast iron, but is how matrix makes the TiC particle with submicron or nano level (10-10 with the stainless steel
2Nm) the disperse distribution is a difficult problem always.According to the physical metallurgy ultimate principle, the strengthening phase particle size is more little in the matrix, and strengthening effect is good more, and for cutter, wear resistance is good more, sharp more beyond doubt, and the cut material section is smooth more.Through experiment, adopt and in the stainless steel base material, to add particle diameter less than 0.1 millimeter Ti, C, Fe, by melting, can realize that required TiC particle in-situ is synthetic;
3. matrix components in proportions control: the experiment back determines that the composition of cutter material is repeatedly: C:0.1～0.34% Cr:12～14% Si≤0.60% Ni≤0.60% Mn :≤0.60% S≤0.03%0.TiC:2-4%, surplus is Fe.
4. preparation technology: can finish the preparation of required cutter material according to following steps
1) material---with Ti, C, Fe superfine grinding, particle diameter is less than 0.1 millimeter, to prepare interpolation;
2), the melting body material---selecting stainless steel 2Cr13 for use is body material, carries out melting in vacuum or medium-frequency induction furnace;
3), add pulverised material---in the body material of fusing, press the proportion requirement of body material 97vol%, synthetic back Ti3vol%, add and pulverize back Ti, C, Fe powder, temperature is controlled at more than 1800 ℃ and (is no more than 2000 ℃), forms the disperse distribution TiC of 10-102nm;
4), the ingot casting electroslag---pore and small amount of impurities can't be avoided in the ingot casting inside behind the synthetic TiC, increase high-temperature electric resistance furnace electroslag operation one for this reason, get rid of pore elimination subsurface defect.
This be matrix with the stainless steel, by original position synthesis technique disperse ultra-fine (submicron is to nano level) the TiC particulate material that in matrix, is evenly distributed, obtain bigger raising in intensity, hardness, aspect performance such as heat-resisting, wear-resistant, corrosion-resistant, still has simultaneously higher plasticity and toughness, therefore very be suitable as the material of granules cut moving knife and so on cutting tool, and can be widely used in the mechanical component of work under the harsh working condition such as chemical industry, chemical fibre.Owing to do not contain rare precious metals so low price.Test shows, its room-temperature mechanical property is: б b 〉=720Mpa; б 0.2 〉=410MPa; δ 〉=20%, high temperature (700 ℃); Mechanical property: б b 〉=350Mpa; б 0.2 〉=140MPa; δ 〉=30%; Creep-resistant property (600 ℃, 260MPa); Creep rupture life L 〉=200h, high temperature (850 ℃) antioxidant property: 100h oxidation weight gain≤4mg/cm2; Abrasion resistance properties: other improves 2 times in the part life-span than 18 8 series stainless steels, improves 1-2 doubly than the heat-resistance stainless steel that is used under the same working condition, can replace expensive cobalt base alloy fully.Granules cut moving knife after making prolongs 30-50% than cobalt base alloy cutter work-ing life.And in using, production line is confirmed.
In addition, what deserves to be mentioned is that cutter material of the present invention has the ideal machining property, be embedded in after fully can mechanical workout and form cutting edge in the cutter hub, machinable still after the thermal treatment, thus be convenient to the manufacturing of cutter.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (6)
1. particle cutting knife material is grouped into by the one-tenth of following volume percent:
Matrix Martensite Stainless Steel 96-98%
TiC 2-4％
Wherein TiC is with 10-10
2The nm disperse is distributed in the matrix stainless steel.
2. according to the described particle cutting knife material of claim 1, it is characterized in that: described matrix Martensite Stainless Steel is one of 18-8 stainless steel, 1Cr13 stainless steel, 2Cr13 stainless steel, 3Cr13 stainless steel, 4Cr13 stainless steel.
3. according to the described particle cutting knife material of claim 1, it is characterized in that: the composition of described matrix Martensite Stainless Steel is
C:0.1～0.34%; Cr:12～14%; Si≤0.60%; Ni≤0.60%; Mn :≤0.60%; S≤0.03%, surplus are Fe.
4. according to described particle cutting knife material of claim 1 and preparation method thereof, it is characterized in that: described Martensite Stainless Steel is 2Cr13, and the volume percent of described 2Cr13 is 97%, and the volume percent of TiC is 3%.
5. according to the preparation method of the described particle cutting knife material of claim 1, it is characterized in that: may further comprise the steps
1) material---with Ti, C, Fe superfine grinding, particle diameter is less than 0.1 millimeter, to prepare interpolation;
2), melting body material---Martensite Stainless Steel is put into the melting equipment melting;
3)---after the body material fusing, by above finished product proportion requirement, add and pulverize back Ti, C, Fe powder, temperature is controlled at 1800 ℃---, forms 10-10 by 2000 ℃, to add pulverised material
2The disperse distribution TiC of nm;
4), ingot casting electroslag---high temperature electroslag behind the ingot casting, get rid of ingot casting internal porosity and defective.
6. according to the preparation method of the described particle cutting knife material of claim 5, it is characterized in that: described Martensite Stainless Steel is 2Cr13, and the volume percent of described 2Cr13 is 97%, and the volume percent of TiC is 3%.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100413917A CN100387747C (en) | 2006-08-21 | 2006-08-21 | Particle cutting knife material and its preparation method |
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| CNB2006100413917A CN100387747C (en) | 2006-08-21 | 2006-08-21 | Particle cutting knife material and its preparation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102575311A (en) * | 2009-10-12 | 2012-07-11 | 斯奈克玛 | Heat treatment of martensitic stainless steel after remelting under a layer of slag |
| CN103820730A (en) * | 2013-11-11 | 2014-05-28 | 常熟市迅达粉末冶金有限公司 | High-performance powder metallurgy stainless steel and preparation method thereof |
| CN103993271A (en) * | 2014-05-06 | 2014-08-20 | 中国科学院金属研究所 | Method for improving liquid metal corrosion resistance of martensitic heat-resistant steel |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1086991A (en) * | 1977-08-22 | 1980-10-07 | Harry Tanczyn | Abrasion resistant stainless steel |
| US4174967A (en) * | 1978-01-27 | 1979-11-20 | Chromalloy American Corporation | Titanium carbide tool steel composition for hot-work application |
| JPH0771742B2 (en) * | 1992-03-30 | 1995-08-02 | 株式会社神戸製鋼所 | Joining method of titanium carbide sintered alloy and stainless steel |
| JPH10588A (en) * | 1996-06-12 | 1998-01-06 | Japan Steel Works Ltd:The | Cutter blade, its manufacture, and pellet manufacturing device |
| CN1079443C (en) * | 1999-06-24 | 2002-02-20 | 东南大学 | Titanium carbide reinforced antiwear aluminium alloy and its preparing process |
| JP4216526B2 (en) * | 2002-05-16 | 2009-01-28 | 株式会社神戸製鋼所 | Pelletizer knife |
| CN1261608C (en) * | 2003-09-12 | 2006-06-28 | 沈阳工业大学 | In-situ synthesize (TiW) C granule reinforced Fe base composition and its preparation metod |
| CN100348757C (en) * | 2004-12-14 | 2007-11-14 | 中国科学院金属研究所 | Corrosion- and wear- proof metal ceramic composite material plastic pelletizing knife |
| CN100497688C (en) * | 2005-12-27 | 2009-06-10 | 北京航空航天大学 | Method of preparing TiC-FeNiCrMo composite material using aluminothermic-fast solidification technology |
-
2006
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102575311A (en) * | 2009-10-12 | 2012-07-11 | 斯奈克玛 | Heat treatment of martensitic stainless steel after remelting under a layer of slag |
| US8808474B2 (en) | 2009-10-12 | 2014-08-19 | Snecma | Heat treatment of martensitic stainless steel after remelting under a layer of slag |
| CN102575311B (en) * | 2009-10-12 | 2014-12-10 | 斯奈克玛 | Heat treatment of martensitic stainless steel after remelting under a layer of slag |
| CN103820730A (en) * | 2013-11-11 | 2014-05-28 | 常熟市迅达粉末冶金有限公司 | High-performance powder metallurgy stainless steel and preparation method thereof |
| CN103820730B (en) * | 2013-11-11 | 2016-01-06 | 常熟市迅达粉末冶金有限公司 | A kind of high-performance powder metallurgy stainless steel and preparation method thereof |
| CN103993271A (en) * | 2014-05-06 | 2014-08-20 | 中国科学院金属研究所 | Method for improving liquid metal corrosion resistance of martensitic heat-resistant steel |
| CN103993271B (en) * | 2014-05-06 | 2016-04-06 | 中国科学院金属研究所 | A kind of method improving the resistance to liquid metal corrosion of martensite heat-resistant steel |
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| CN100387747C (en) | 2008-05-14 |
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