CN1693518A - Wear resistance component and manufacturing method therof - Google Patents
Wear resistance component and manufacturing method therof Download PDFInfo
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- CN1693518A CN1693518A CN 200510069015 CN200510069015A CN1693518A CN 1693518 A CN1693518 A CN 1693518A CN 200510069015 CN200510069015 CN 200510069015 CN 200510069015 A CN200510069015 A CN 200510069015A CN 1693518 A CN1693518 A CN 1693518A
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Abstract
The invention provides an abrasion resistant member having high abrasion resistance, and to provide a manufacturing method therefor. The abrasion resistant member consists of a base metal and a hardened layer harder than the base metal formed thereon, wherein the hardened layer comprises 60 to 20 mass% of matrix made of an Fe-Cr-C-based alloy, and 40 to 80 mass% of hard metal particles with an average particle diameter D50 of 60 to 800 [mu]m, dispersed in the matrix of the alloy. Thus obtained abrasion-resistant member disperses a sufficient amount of the hard metal particles having such a size as to sufficiently develop the abrasion resistance in the hardened layer, and consequently provides high abrasion resistance.
Description
Technical field
The wear resistance parts and the manufacturing side thereof that the present invention relates to be used for the abrasion position of various industrial machines go.
Background technology
Have on the parts of wear resistance in requirements such as the track of the transfer roller of conveyance iron and steel or cement, bearing plane linings, use as the wear resistance parts of built-up welding hardened layer on base material.
Above-mentioned hardened layer is known the material that chromium carbide is separated out.In addition, in order further to improve wear resistance, can consider tungsten-carbide powder is scattered in (patent documentation 1) in the hardened layer.
Patent documentation 1: the spy opens flat 11-172408 communique
Summary of the invention
But, the powder of wolfram varbide, because its median size D50 is that 1 μ m is when following, very fine powder in the time of, so though the Vickers' hardness of wolfram varbide (Hv) is 1500, but the hardness of hardened layer of powder that is dispersed with wolfram varbide can not obtain competent hardness but for about 1000Hv, and wear resistance is also insufficient as a result.In addition, so-called median size D50 is meant, is 50% particle footpath with respect to the mass accumulation of whole granular masss.
The present invention is to be the invention that background is finished with the above-mentioned fact, and its purpose is to provide wear resistance parts and the manufacture method thereof with high-wearing feature.
The 1st invention for achieving the above object, be the wear resistance parts that on base material, are formed with the hardened layer harder than this base material, it is characterized in that, this hardened layer mesostroma alloy is 60～20% quality, and the median size D50 that is dispersed with 40～80 quality % quality on this matrix alloy is the superhard alloy particle of 60 μ m～800 μ m.
In addition, the 2nd invention, be in the 1st invention, the chemical ingredients of above-mentioned matrix alloy is, in weight %, C:2.5～6%, Cr:20～40%, V:0～5%, Si:0～5%, Mo:0～15%, Nb:0～15%, Mn:0～4%, B:0.5～3.0%, Ni:0～10%, W:0～10%.
In addition, the 3rd invention, it is the wear resistance member manufacturing method that on base material, is formed with the hardened layer harder than this base material, it is characterized in that, comprise that (a) pulverizes particle diameter greater than the superhard alloy piece of 2.0mm, obtaining median size D50 is the superhard alloy particulate pulverizing process of 60 μ m～800 μ m; (b) superhard alloy particle that will obtain in this pulverizing process and matrix alloy powder mix, and the median size D50 that acquisition contains 40～80% quality is the mixed processes of the superhard alloy particulate built-up welding powder of 60 μ m～800 μ m; (c) be fused on the base material by the built-up welding powder that will obtain in this mixed processes is overlapping, form the built-up welding operation of above-mentioned hardened layer.
The 4th invention is characterised in that, in the 3rd invention, uses with the sintered carbide tools that has given up as above-mentioned superhard alloy piece.
According to above-mentioned the 1st invention, owing in hardened layer, be dispersed with the superhard alloy particle that having of abundant amount can be given full play to the wear resistance size, so can obtain high-wearing feature.
In addition, according to above-mentioned the 2nd invention, because the chemical ingredients of above-mentioned matrix alloy is, in weight %, C:2.5～6%, Cr:20～40%, V:0～5%, Si:0～5%, Mo:0～15%, Nb:0～15%, Mn:0～4%, B:0.5～3.0%, Ni:0～10%, W:0～10% are so can obtain good wear resistance.
According to the manufacture method of above-mentioned the 3rd invention, owing to having, the wear resistance parts of making in view of the above are dispersed with the superhard alloy particulate hardened layer that having of abundant amount can be given full play to the wear resistance size, so can obtain high-wearing feature.
Description of drawings
Fig. 1 shows the artwork of wear resistance member manufacturing method of the present invention.
Fig. 2 shows the figure that the signal of the built-up welding operation that can be used for Fig. 1 and the manufacturing installation in the refrigerating work procedure constitutes.
Fig. 3 shows the synoptic diagram of the test method of the wear test in 5 hours that is used to estimate wear resistance.
10: manufacturing installation
12: wear resistance plate (wear resistance parts)
14: roller conveyer
16: hopper
18: thickness is adjusted plate
20: preheating machine
22: process furnace
24: Warming machine
26: the built-up welding powder
28: base material
30: hardened layer
40: copper coin
42: No. 6, silica sand
The working of an invention mode
Fig. 1 is the artwork of expression wear resistance member manufacturing method of the present invention.At first, in pulverizing process P1, particle diameter is pulverized greater than the superhard alloy piece of 2.0mm, preparation median size D50 is the superhard alloy particle of 60 μ m～800 μ m.Above-mentioned superhard alloy piece, as the 3rd invention, from the cost aspect, the preferred use with useless sintered carbide tools, and also can make especially in order to make this superhard alloy particle.In addition, the size of superhard alloy piece is that the particle of 60 μ m～800 μ m enough gets final product greatly like that so long as can produce median size D50 by pulverizing, and the upper limit is limited especially.
As superhard alloy, be fit to use WC-Co system, but be not limited to this, as long as WC is a main body, various alloys such as WC-TaC-Co, WC-TiC-Co, WC-TiC-TaC-Co all can use.
When pulverizing, can use the shredding unit of the machinery of ball mill etc.It is that 60 μ m～800 μ m pulverize like that the degree of pulverizing preferably makes median size D50, but also can be after pulverizing by fine powder (for example smaller or equal to 45 μ m powder) or meal (for example more than or equal to 2000 μ m or 1000 μ m powder) are removed with sieve, make median size D50 become 60 μ m～800 μ m.
The reason of superhard alloy particulate median size D50 in above-mentioned scope is, can not give full play to wear resistance if particle diameter is too small, on the contrary, dispersiveness if particle diameter is excessive to matrix worsens, in addition, if the superhard alloy particle becomes excessive with respect to the thickness of hardened layer, then become and peel off easily.In addition, and the thickness of hardened layer between the pass fasten, the superhard alloy particle less than the thickness that is preferably hardened layer 1/3 or below.
In ensuing mixed processes P2, the superhard alloy particle that will obtain in above-mentioned pulverizing process P1 mixes with the ratio of regulation with matrix alloy powder as the matrix components of hardened layer, makes the built-up welding powder.Blending ratio is become, contain the matrix alloy powder of 60～20% quality, contain the superhard alloy particle of 40～80% quality.The reason of determining such blending ratio is, when the superhard alloy particle in the built-up welding powder during greater than 80% quality, the hardened layer of this built-up welding powder institute moulding is easy to generate the crack or peels off, if the superhard alloy particle is less than 40% quality, then the contributive superhard alloy proportion of particles of wear resistance is become too small, can not obtain sufficient abrasion resistance.
As above-mentioned matrix alloy, can use as the known Fe-Cr-C of wear-resisting material is alloy or Ni base self-melting alloy etc., the chemical ingredients that is fit to of this matrix alloy is, for example, in weight %, C (carbon): 2.5～6%, Cr (chromium): 20～40%, V (vanadium): 0～5%, Si (silicon): 0～5%, Mo (molybdenum): 0～15%, Nb (niobium): 0～15%, Mn (manganese): 0～4%, B (boron): 0.5～3.0%, Ni (nickel): 0～10%, W (tungsten): 0～10%.
In ensuing built-up welding operation P3, will in above-mentioned mixed processes P2, obtain overlapping being fused on the base material of built-up welding powder.Then, in ensuing refrigerating work procedure P4, the parts after the built-up welding are cooled off.
As above-mentioned base material, can use the iron of carbon steel, stainless steel etc. is base material, also can be the light alloy of aluminum or aluminum alloy etc.In addition, different shape such as that the shape of base material can be used is tabular, tubulose under tabular situation, can be tabular, also can be the shape in transverse bend.Under the piped situation, can be straight tube-like, also can be for being formed with the shape of bend.
Overlaying method can use the whole bag of tricks that there is no particular limitation such as gas welding connects, arc welding, electroslag welding, PLASMA ARC WELDING, spraying plating.In addition, also can use, in process furnace, make this built-up welding powder be fused to the method that substrate surface carries out built-up welding by above-mentioned built-up welding powder mounting is formed powder bed on base material.In addition, in order to improve the cohesiveness of base material and hardened layer, can before carry out built-up welding, substrate surface be carried out asperities handle.
Fig. 2 can be used for the figure that the signal of the manufacturing installation 10 of the built-up welding operation P3 of Fig. 1 and refrigerating work procedure P4 constitutes for expression.This manufacturing installation 10 is the examples that can make continuously as the device of the wear resistance plate 12 of wear resistance parts.This manufacturing installation 10 possesses roller conveyer 14, from the upstream side of this roller conveyer 14, is disposed with hopper 16, thickness adjustment plate 18, preheating machine 20, process furnace 22, Warming machine 24.
In hopper 16, drop into synthetic in advance built-up welding powder 26, by on roller conveyer 14 with certain speed moving substrate 28, make that the built-up welding powder 26 in the hopper 16 are supplied on the base material 28 successively.Supply to the thickness of the built-up welding powder 26 on the base material 28, become homogeneous by thickness adjusting plate by making it.
Then, loaded the base material 28 of the built-up welding powder 26 of homogeneous thickness, through preheating machine 20 by conveyance in process furnace 22.Above-mentioned preheating machine 20 for being used to relax rapid temperature variation before process furnace 22, and being set under the relative low temperature and heating.
Then, base material 28 by conveyance in the Warming machine 24 in the downstream side that is arranged on process furnace 22.This Warming machine 24 is for being used to relax rapid temperature variation behind process furnace 22.Then, base material 28 is carried out naturally cooling by further conveyance downstream.
Embodiment
Below, with comparative example embodiments of the invention are described.Native sand milling consumption (g/5h) in the composition of the matrix alloy of embodiment shown in the table 1 and comparative example, superhard alloy particulate adding proportion and median size D50 thereof and the wear test in 5 hours.In addition, superhard alloy particulate adding proportion is, with respect to the built-up welding powder, promptly matrix alloy and superhard alloy particulate add up to the ratio of weight, and the mass percent of each element during matrix alloy is formed is the ratio in matrix alloy.In addition, that base material uses is mild steel plate (SS400), and that the superhard alloy particle uses is WC-8%Co.
Table 1
| The superhard alloy particle | Matrix alloy is formed (wt%) | Soil sand milling consumption (g/5h) | ||||||||||||
| Adding proportion | ??D50 ??(μm) | ??C | ??Si | ??Mn | ??Ni | ??Cr | ??Mo | ??W | ??V | ??Nb | ??B | ??Fe | ||
| Embodiment 1 | ????75％ | ??800 | ??4.0 | ??2.0 | ??2.0 | ??4.5 | ??32.0 | ??3.0 | All the other | ????0.35 | ||||
| Embodiment 2 | ????″ | ??800 | ??4.0 | ??2.0 | ??4.5 | ??34.0 | ??1.8 | All the other | ????0.62 | |||||
| Embodiment 3 | ????″ | ??800 | ??5.6 | ??1.2 | ??21.0 | ?10.0 | ?8.0 | ?9.0 | ??2.5 | All the other | ????0.40 | |||
| Embodiment 4 | ????″ | ??800 | ??4.2 | ??1.0 | ??22.0 | ?6.0 | ?3.0 | ??2.5 | All the other | ????0.41 | ||||
| Embodiment 5 | ????″ | ??800 | ??3.5 | ??2.0 | ??30.0 | ??3.0 | All the other | ????0.50 | ||||||
| Embodiment 6 | ????″ | ??80 | ??4.0 | ??2.0 | ??2.0 | ??4.5 | ??32.0 | ??3.0 | All the other | ????0.67 | ||||
| Embodiment 7 | ????″ | ??200 | ??4.0 | ??2.0 | ??2.0 | ??4.5 | ??32.0 | ??3.0 | All the other | ????1.49 | ||||
| Embodiment 8 | ????50％ | ??800 | ??4.0 | ??2.0 | ??2.0 | ??4.5 | ??32.0 | ??3.0 | All the other | ????1.73 | ||||
| Embodiment 9 | ????″ | ??800 | ??4.0 | ??2.0 | ??4.5 | ??34.0 | ??1.8 | All the other | ????1.91 | |||||
| | ????″ | ??800 | ??5.6 | ??1.2 | ??21.0 | ?10.0 | ?8.0 | ?9.0 | ??2.5 | All the other | ????0.79 | |||
| Embodiment 11 | ????″ | ??800 | ??4.2 | ??1.0 | ??22.0 | ?6.0 | ?3.0 | ??2.5 | All the other | ????0.84 | ||||
| | ????″ | ??800 | ??3.5 | ??2.0 | ??30.0 | ??3.0 | All the other | ????1.33 | ||||||
| Embodiment 13 | ????″ | ??80 | ??4.0 | ??2.0 | ??2.0 | ??4.5 | ??32.0 | ??3.0 | All the other | ????1.88 | ||||
| | ????″ | ??200 | ??4.0 | ??2.0 | ??2.0 | ??4.5 | ??32.0 | ??3.0 | All the other | ????1.65 | ||||
| Comparative example 1 | ????75％ | ??20 | ??4.0 | ??2.0 | ??2.0 | ??4.5 | ??32.0 | ??3.0 | All the other | ????4.12 | ||||
| Comparative example 2 | ????50％ | ??20 | ??4.0 | ??2.0 | ??2.0 | ??4.5 | ??32.0 | ??3.0 | All the other | ????4.44 | ||||
| Comparative example 3 | ????25％ | ??800 | ??4.0 | ??2.0 | ??2.0 | ??4.5 | ??32.0 | ??3.0 | All the other | ????2.48 | ||||
| Comparative example 4 | ????″ | ??80 | ??4.0 | ??2.0 | ??2.0 | ??4?5 | ??32.0 | ??3.0 | All the other | ????2.82 | ||||
Above-mentioned median size D50, for by utilizing 19 kinds of sieves (8,10,12,14,16,20,24,28,32,36,42,50,60,80,100,145,200,250,350 order) to sieve, measure the weight of each screen overflow, making transverse axis is particle diameter, and the longitudinal axis is the value that the granularity accumulation curve of cumulative frequency (%) is obtained.Table 2 illustrates median size D50=800 μ m, the 200 μ m that are displayed in Table 1, the superhard alloy particulate size-grade distribution of 80 μ m, 20 μ m.
Table 2
| Median size D50 (μ m) | The size-grade distribution of superhard alloy | ||||
| ?0～45μm | ?45～150μm | ?150～350μm | ?350～1000μm | ?1000～2000μm | |
| ????800 | ????2.4％ | ????9.6％ | ????16.6％ | ????42.1％ | ????29.3％ |
| ????200 | ????0.1％ | ????5.6％ | ????78.0％ | ????16.2％ | ????0.1％ |
| ????80 | ????18.6％ | ????79.4％ | ????2.0％ | ????0.0％ | ????0.0％ |
| ????20 | ????84.6％ | ????15.4％ | ????0.0％ | ????0.0％ | ????0.0％ |
In addition, wear test in above-mentioned 5 hours, shown in the synoptic diagram of Fig. 3, be on discoid copper coin 40, to be paved with No. 6, silica sand (42), make wear resistance plate 12 (2cm * 2cm), hardened layer 30 is applied with the state of the loading (4kg) of regulation down and downwards, slides along copper coin 40, and continue 5 hours test.
In table 1, matrix alloy is formed identical, median size D50 is also identical, and the comparison between the comparison between the different embodiment 1 of superhard alloy particulate adding proportion, embodiment 8, comparative example 3 and embodiment 6, embodiment 13, the comparative example 4 as can be known, if superhard alloy particulate adding proportion is too small, it is big that then native sand milling consumption becomes, and promptly wear resistance becomes insufficient.In addition,, make it, then as mentioned above, can produce the crack or peel off, so that can't carry out the test of native sand milling consumption more than or equal to 85% if increase superhard alloy particulate adding proportion.
In addition, matrix alloy is formed identical, superhard alloy particulate adding proportion is also identical, and the comparison between the comparison between the different embodiment 1 of median size D50, embodiment 6, comparative example 1 and embodiment 8, embodiment 13, the comparative example 14 as can be known, even superhard alloy particulate adding proportion is big, if median size D50 is too small, then wear resistance is also insufficient.In addition, if owing to make median size D50 greater than 800 μ m, then the concavo-convex of surface becomes excessive, in addition, the dispersion of matrix alloy become insufficient, so be inappropriate.
And then, from the comparison of embodiment 1～7 and embodiment 8～14, as can be known,, then can obtain and the irrelevant sufficient abrasion resistance of the composition of matrix alloy if the size of median size D50 and superhard alloy particulate adding proportion are suitable.
Then, in table 3, illustrated, made superhard alloy particulate adding proportion, when indeclinable in its median size D50, the matrix alloy consists of identical conditions, the relation between the composition of the matrix alloy of embodiment and comparative example and its wear resistance are estimated.This wear resistance evaluation be based on the same wear test of wear test in above-mentioned 5 hours in the evaluation of native sand milling consumption etc.
Table 3
| The superhard alloy particle | Matrix alloy is formed (wt%) | The result | Estimate | |||
| Soil sand milling consumption (g/5h) | Make | |||||
| Adding proportion | ?D50 | ??C????Si????Mn????Ni???Cr????Mo????W????V????Nb????B????Fe | ||||
| Comparative example 21 embodiment 21 embodiment 22 comparative examples 22 | ??50％ ??50％ ??50％ ??50％ | ??800μm ??800μm ??800μm ??800μm | 2.0 2.0 30.0 3.0 all the other 2.5 2.0 30.0 3.0 all the other 6.0 2.0 30.0 3.0 all the other 6.5 2.0 30.0 3.0 all the other | ????10 ????1.5 ????0.6 ????-- | The welding of possibility possibility possibility, stress rupture | The low wear resistance excellent abrasive resistance of wear resistance well can not be made |
| Comparative example 23 embodiment 23 embodiment 24 comparative examples 24 | ??50％ ??50％ ??50％ ??50％ | ??800μm ??800μm ??800μm ??800μm | 3.5 2.0 15.0 3.0 all the other 3.5 2.0 20.0 3.0 all the other 3.5 2.0 40.0 3.0 all the other 3.5 2.0 50.0 3.0 all the other | ????10 ????1.7 ????1.5 ????1.5 | May | The low wear resistance excellent abrasive resistance good result of wear resistance is constant, meaningless |
| Comparative example 25 embodiment 25 embodiment 26 comparative examples 26 | ??50％ ??50％ ??50％ ??50％ | ??800μm ??800μm ??800μm ??800μm | 3.5 2.0 30.0 0.3 all the other 3.5 2.0 30.0 0.5 all the other 3.5 2.0 30.0 3.0 all the other 3.5 2.0 30.0 3.5 all the other | ????10 ????1.73 ????0.79 ????-- | The welding of possibility possibility possibility, stress rupture | The low wear resistance excellent abrasive resistance of wear resistance well can not be made |
In table 3, from embodiment 21 and comparative example 21, as can be known, if the ratio of the C in the chemical ingredients of matrix alloy beyond the lower limit of the scope of 2.5～6.0% weight or the upper limit time, then wear resistance descends or defective products takes place and can not make in the contrast of embodiment 22 and comparative example 22.In addition, from embodiment 23 and comparative example 23, as can be known, if the ratio of Cr beyond the lower limit of the scope of 20～40% weight or the upper limit time, then wear resistance descends or effect does not change and unsaturated in the contrast of embodiment 24 and comparative example 24, and it is nonsensical that increment becomes.In addition, from embodiment 25 and comparative example 25, as can be known, if the ratio of B beyond the lower limit of the scope of 0.3～3.0% weight or the upper limit time, then wear resistance descends or defective products takes place and can not make in the contrast of embodiment 26 and comparative example 26.
Embodiments of the present invention more than have been described, and the present invention is not limited in above-mentioned embodiment, also can implements with the various changes of carrying out according to those skilled in the art's knowledge, the mode of improvement.
Claims (4)
1. wear resistance parts, be the wear resistance parts that on base material, are formed with the hardened layer harder than this base material, it is characterized in that, this hardened layer mesostroma alloy is 60～20% quality, and the median size D50 that is dispersed with 40～80 quality % quality on this matrix alloy is the superhard alloy particle of 60 μ m～800 μ m.
2. wear resistance parts as claimed in claim 1, wherein the chemical ingredients of above-mentioned matrix alloy is, in weight %, C:2.5～6%, Cr:20～40%, V:0～5%, Si:0～5%, Mo:0～15%, Nb:0～15%, Mn:0～4%, B:0.5～3.0%, Ni:0～10%, W:0～10%.
3. wear resistance member manufacturing method, it is the wear resistance member manufacturing method that on base material, is formed with the hardened layer harder than this base material, it is characterized in that, comprise that (a) pulverizes particle diameter greater than the superhard alloy piece of 2.0mm, obtaining median size D50 is the superhard alloy particulate pulverizing process of 60 μ m～800 μ m; (b) superhard alloy particle that will obtain in this pulverizing process and matrix alloy powder mix, and the median size D50 that acquisition contains 40～80% quality is the mixed processes of the superhard alloy particulate built-up welding powder of 60 μ m～800 μ m; (c) be fused on the base material by the built-up welding powder that will obtain in this mixed processes is overlapping, form the built-up welding operation of above-mentioned hardened layer.
4. wear resistance member manufacturing method as claimed in claim 3 is characterized in that using with the sintered carbide tools that has given up as above-mentioned superhard alloy piece.
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| JP137486/2004 | 2004-05-06 | ||
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910418A (en) * | 2012-09-28 | 2013-02-06 | 北京二七轨道交通装备有限责任公司 | Roller guide rail and manufacturing method thereof, chain transmission system and subgrade treating vehicle |
| CN105838961A (en) * | 2016-04-20 | 2016-08-10 | 苏州市相城区明达复合材料厂 | Abrasion-resistant metal blade for cutting |
| CN106001853A (en) * | 2015-03-27 | 2016-10-12 | 朴基弘 | Method for forming hard metal cemented carbide layer by welding work pieces with cemented carbide powder |
| CN113490757A (en) * | 2019-03-27 | 2021-10-08 | 日本碍子株式会社 | Wear-resistant part material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102006045481B3 (en) * | 2006-09-22 | 2008-03-06 | H.C. Starck Gmbh | metal powder |
| JP6762698B2 (en) * | 2015-10-01 | 2020-09-30 | キヤノン株式会社 | Mixing processing equipment, mixing processing method and toner manufacturing method |
| JP2017205803A (en) * | 2016-05-20 | 2017-11-24 | 株式会社フジコー | Manufacturing method and manufacturing apparatus of welding liner, and welding liner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH08249B2 (en) * | 1987-04-11 | 1996-01-10 | 株式会社クボタ | Sliding member with excellent seizure resistance and wear resistance |
| JPH04337046A (en) * | 1991-05-14 | 1992-11-25 | Japan Steel Works Ltd:The | Wear resistant composite material and formation of wear resistant lining layer |
| JPH0913177A (en) * | 1995-06-29 | 1997-01-14 | Tokushu Denkyoku Kk | Cermet build-up metallic parts by welding and production thereof |
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2004
- 2004-05-06 JP JP2004137486A patent/JP2005320557A/en active Pending
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910418A (en) * | 2012-09-28 | 2013-02-06 | 北京二七轨道交通装备有限责任公司 | Roller guide rail and manufacturing method thereof, chain transmission system and subgrade treating vehicle |
| CN106001853A (en) * | 2015-03-27 | 2016-10-12 | 朴基弘 | Method for forming hard metal cemented carbide layer by welding work pieces with cemented carbide powder |
| CN105838961A (en) * | 2016-04-20 | 2016-08-10 | 苏州市相城区明达复合材料厂 | Abrasion-resistant metal blade for cutting |
| CN113490757A (en) * | 2019-03-27 | 2021-10-08 | 日本碍子株式会社 | Wear-resistant part material |
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| JP2005320557A (en) | 2005-11-17 |
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