CN102980820B - Method for characterizing mixture reinforced thermo plastics (RTP) particle hardness - Google Patents
Method for characterizing mixture reinforced thermo plastics (RTP) particle hardness Download PDFInfo
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Abstract
The invention discloses a method for characterizing mixture reinforced thermo plastics (RTP) particle hardness. The method includes that a way of low pressure compression and sieving is used, low pressure compression is used to damage a particle structure, a brush is used to disperse sampling blocks, a sieving way is used to judge a proportion that the particles is crushed, and therefore hardness of hard alloy mixture particles is characterized in ration, real-time monitor to the hardness of the particles in the mixture RTP particle manufacturing process can be achieved, and the production quality of products is guaranteed. The method has the advantages of being simple, easy to operate, good in reproducibility of data and the like. The hardness of the hard alloy mixture consisting of materials with different constituents or mixture ratios all can be characterized through the method.
Description
Technical field
The present invention relates to Hardmetal materials manufacturing technology field, particularly relate to a kind of method characterizing compound RTP particle hardness.
Background technology
The particle that compound RTP particle refers to WC, Co, the potpourri of adjuvant of a small amount of forming agent and some other necessity is formed through the technological process such as ball milling, drying and granulating, can be directly compressed into hard metal article.
The hardness of current particle mainly adopts the method for microhardness to characterize, but it is inapplicable for compound RTP particle in powder metallurgy, main cause has: one is, compound RTP particle is smaller, and mean grain size, at about 80-200um, measure microhardness, sample must be inlayed, but compound RTP particle edge sample is had any problem, because particle structure belongs to soft-agglomerated more open, very easily pulverized during edge sample; Two are, because of as a same reason, even if inlayed sample, also have no idea to carry out polishing; Three are, because compound RTP particle hardness is very low, measuring error is comparatively large, and result does not have reappearance; Four are, microhardness reaction be individual, embodiment be the hardness of a few particle, and to pay close attention in pressing process be more the soft or hard degree of particle entirety.
Due to, the hardness of compound RTP particle directly affects its suppression performance, and current compound RTP particle hardness is in the industry in the state not having to monitor, thus have impact on the quality of production of product.
Summary of the invention
The object of the invention is to the deficiency overcoming prior art, a kind of method characterizing compound RTP particle hardness is provided, utilize carbide alloy mixture particle hardness low, the feature of easy dispersion, have employed low-pressure compacting screening, thus can the height of quantitatively characterizing carbide alloy mixture particle hardness, can realize, to the real-time monitoring of its particle hardness, ensure that the quality of production of product in compound RTP particle production run; And there is the features such as method is simple, easy to operate, the favorable reproducibility of data.
The technical solution adopted for the present invention to solve the technical problems is: a kind of method characterizing compound RTP particle hardness, comprises the steps:
(1) carbide alloy mixture 40 ~ 60 grams is got;
(2) adopt the standard screen cloth Φ 200*50-0.09/0.063 of GB GB-T 6003 to sieve, remove fine powder;
(3) get the screen overflow 20 grams after screening, use the mould of 15*20mm, with the loading velocity of 5mm/s, unit area press power 3Kg/cm
2, the dwell time is 5 seconds, is pressed into square;
(4) be then the wool brush of 35 ~ 45mm with staple length, brush square gently, make it dispersed, the dynamics of dispersion must rest in powder not crushed when making compacting and do not brushed fragmentation;
(5) the standard screen cloth Φ 200*50-0.09/0.063 of GB GB-T 6003 is adopted to sieve the carbide alloy mixture after dispersion again, under when suppressing, crushed powder enters sieve, comparatively complete particle stays on sieve, measures the weight of screen underflow, is designated as a;
(6) calculate the percentage by weight a/20*100% of screen underflow, and the hardness defining this percentage by weight and carbide alloy mixture particle is inversely proportional to.
A kind of method characterizing compound RTP particle hardness of the present invention, is destroy particle structure with low-pressure compacting, with hairbrush dispersion sample block, judges with method for sieving the ratio that particle is crushed.Carried out the hardness of reaction hard alloy compound particle by the number percent of the weight of screen underflow, screen underflow percentage by weight is less, illustrates that compound particle hardness is higher, more be not easy crushed, otherwise screen underflow percentage by weight is larger, illustrate that compound particle is softer, more crushed.The scope of the percentage by weight of screen underflow is 0 ~ 50%.
The invention has the beneficial effects as follows, owing to have employed the mode of low-pressure compacting screening, particle structure is destroyed with low-pressure compacting, with hairbrush dispersion sample block, the ratio that particle is crushed is judged with method for sieving, thus can the height of quantitatively characterizing carbide alloy mixture particle hardness, can realize, to the real-time monitoring of its particle hardness, ensure that the quality of production of product in compound RTP particle production run; And the hardness of carbide alloy mixture that the raw material of heterogeneity or proportioning is formed can characterize by this method.Compared with prior art, there is following features:
One is, method is simple, easy to operate;
Two are, the favorable reproducibility of data;
Three are, can monitor in real time the compound particle hardness that produced on-site goes out.
Below in conjunction with embodiment, the present invention is described in further detail; But a kind of method characterizing compound RTP particle hardness of the present invention is not limited to embodiment.
Embodiment
Embodiment one
A kind of method characterizing compound RTP particle hardness of the present invention, wherein, compound RTP particle is made up of the adjuvant of 0.8um WC-10%Co-2% paraffin and some other necessity, characterizes the method for this kind of compound RTP particle hardness, comprises the steps:
(1) carbide alloy mixture (namely comprising the compound RTP of the adjuvant of 0.8um WC-10%Co-2% paraffin and some other necessity) 50 grams is got;
(2) adopt the standard screen cloth Φ 200*50-0.09/0.063 of GB GB-T 6003 to sieve, remove fine powder;
(3) get the screen overflow 20 grams after screening, use the mould of 15*20mm, with the loading velocity of 5mm/s, unit area press power 3Kg/cm
2, the dwell time is 5 seconds, is pressed into square; Now in square, powder particle adhesion is very little, and the smaller powder of partial intensities is crushed;
(4) be then the wool brush of 40mm with staple length, brush square gently, make it dispersed, the dynamics of dispersion must rest in powder not crushed when making compacting and do not brushed fragmentation;
(5) by again dispersion after carbide alloy mixture adopt (namely comprising the compound RTP of the adjuvant of 0.8um WC-10%Co-2% paraffin and some other necessity) the standard screen cloth Φ 200*50-0.09/0.063 of GB GB-T 6003 to sieve, under when suppressing, crushed powder enters sieve, comparatively complete particle stays on sieve, measure the weight of screen underflow, be designated as a;
(6) calculate the percentage by weight a/20*100% of screen underflow, and the hardness defining this percentage by weight and carbide alloy mixture particle is inversely proportional to.
A kind of method characterizing compound RTP particle hardness of the present invention, is destroy particle structure with low-pressure compacting, with hairbrush dispersion sample block, judges with method for sieving the ratio that particle is crushed.Carried out the hardness of reaction hard alloy compound particle by the number percent of the weight of screen underflow, screen underflow percentage by weight is less, illustrates that compound particle hardness is higher, more be not easy crushed, otherwise screen underflow percentage by weight is larger, illustrate that compound particle is softer, more crushed.The scope of the percentage by weight of screen underflow is 0 ~ 50%.
Embodiment two
A kind of method characterizing compound RTP particle hardness of the present invention, wherein, compound RTP particle is made up of the adjuvant of 3.5um WC-6%Co-2% paraffin and some other necessity, characterizes the method for this kind of compound RTP particle hardness, comprises the steps:
(1) carbide alloy mixture (namely comprising the compound RTP of the adjuvant of 3.5um WC-6%Co-2% paraffin and some other necessity) 50 grams is got;
(2) adopt the standard screen cloth Φ 200*50-0.09/0.063 of GB GB-T 6003 to sieve, remove fine powder;
(3) get the screen overflow 20 grams after screening, use the mould of 15*20mm, with the loading velocity of 5mm/s, unit area press power 3Kg/cm
2, the dwell time is 5 seconds, is pressed into square; Now in square, powder particle adhesion is very little, and the smaller powder of partial intensities is crushed;
(4) be then the wool brush of 35mm with staple length, brush square gently, make it dispersed, the dynamics of dispersion must rest in powder not crushed when making compacting and do not brushed fragmentation;
(5) by again dispersion after carbide alloy mixture adopt (namely comprising the compound RTP of the adjuvant of 3.5um WC-6%Co-2% paraffin and some other necessity) the standard screen cloth Φ 200*50-0.09/0.063 of GB GB-T 6003 to sieve, under when suppressing, crushed powder enters sieve, comparatively complete particle stays on sieve, measure the weight of screen underflow, be designated as a;
(6) calculate the percentage by weight a/20*100% of screen underflow, and the hardness defining this percentage by weight and carbide alloy mixture particle is inversely proportional to.
Embodiment three
A kind of method characterizing compound RTP particle hardness of the present invention, wherein, compound RTP particle is made up of the adjuvant of 10.0um WC-12%Co-2% paraffin and some other necessity, characterizes the method for this kind of compound RTP particle hardness, comprises the steps:
(1) carbide alloy mixture (namely comprising the compound RTP of the adjuvant of 10.0um WC-12%Co-2% paraffin and some other necessity) 50 grams is got;
(2) adopt the standard screen cloth Φ 200*50-0.09/0.063 of GB GB-T 6003 to sieve, remove fine powder;
(3) get the screen overflow 20 grams after screening, use the mould of 15*20mm, with the loading velocity of 5mm/s, unit area press power 3Kg/cm
2, the dwell time is 5 seconds, is pressed into square; Now in square, powder particle adhesion is very little, and the smaller powder of partial intensities is crushed;
(4) be then the wool brush of 45mm with staple length, brush square gently, make it dispersed, the dynamics of dispersion must rest in powder not crushed when making compacting and do not brushed fragmentation;
(5) by again dispersion after carbide alloy mixture adopt (namely comprising the compound RTP of the adjuvant of 10.0um WC-12%Co-2% paraffin and some other necessity) the standard screen cloth Φ 200*50-0.09/0.063 of GB GB-T 6003 to sieve, under when suppressing, crushed powder enters sieve, comparatively complete particle stays on sieve, measure the weight of screen underflow, be designated as a;
(6) calculate the percentage by weight a/20*100% of screen underflow, and the hardness defining this percentage by weight and carbide alloy mixture particle is inversely proportional to.
A kind of method characterizing compound RTP particle hardness of the present invention, the hardness of the carbide alloy mixture that the raw material of heterogeneity or proportioning is formed can characterize by this method.
Above-described embodiment is only used for further illustrating a kind of method characterizing compound RTP particle hardness of the present invention; but the present invention is not limited to embodiment; every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all fall in the protection domain of technical solution of the present invention.
Claims (1)
1. characterize a method for compound RTP particle hardness, it is characterized in that: comprise the steps:
(1) carbide alloy mixture 40 ~ 60 grams is got;
(2) adopt the standard screen cloth Φ 200*50-0.09/0.063 of GB GB-T 6003 to sieve, remove fine powder;
(3) get the screen overflow 20 grams after screening, use the mould of 15*20mm, with the loading velocity of 5mm/s, unit area press power 3Kg/cm
2, the dwell time is 5 seconds, is pressed into square;
(4) be then the wool brush of 35 ~ 45mm with staple length, brush square gently, make it dispersed, the dynamics of dispersion must rest in powder not crushed when making compacting and do not brushed fragmentation;
(5) the standard screen cloth Φ 200*50-0.09/0.063 of GB GB-T 6003 is adopted to sieve the carbide alloy mixture after dispersion again, under when suppressing, crushed powder enters sieve, comparatively complete particle stays on sieve, measures the weight of screen underflow, is designated as a;
(6) calculate the percentage by weight a/20*100% of screen underflow, and the hardness defining this percentage by weight and carbide alloy mixture particle is inversely proportional to.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210458555.1A CN102980820B (en) | 2012-11-14 | 2012-11-14 | Method for characterizing mixture reinforced thermo plastics (RTP) particle hardness |
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| CN201210458555.1A CN102980820B (en) | 2012-11-14 | 2012-11-14 | Method for characterizing mixture reinforced thermo plastics (RTP) particle hardness |
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| CN102980820B true CN102980820B (en) | 2015-01-21 |
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| CN109142032B (en) * | 2018-09-28 | 2020-12-01 | 湖州达立智能设备制造有限公司 | Physical tester for screening agricultural materials and testing hardness by lowering potential energy |
| CN117705621B (en) * | 2024-02-06 | 2024-04-16 | 深圳市春旺新材料股份有限公司 | Hardness detection device of water-absorbing particulate matter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5950341A (en) * | 1982-09-16 | 1984-03-23 | Mitsubishi Heavy Ind Ltd | Method for testing milling property |
| CN1538162A (en) * | 2002-11-08 | 2004-10-20 | 无锡粮食机械厂 | Wheat grain hardness measuring instrument |
| CN201397275Y (en) * | 2009-03-26 | 2010-02-03 | 湘潭巨发颜料化工有限公司 | Device used for detecting rigidity of pigment granulation product |
-
2012
- 2012-11-14 CN CN201210458555.1A patent/CN102980820B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5950341A (en) * | 1982-09-16 | 1984-03-23 | Mitsubishi Heavy Ind Ltd | Method for testing milling property |
| CN1538162A (en) * | 2002-11-08 | 2004-10-20 | 无锡粮食机械厂 | Wheat grain hardness measuring instrument |
| CN201397275Y (en) * | 2009-03-26 | 2010-02-03 | 湘潭巨发颜料化工有限公司 | Device used for detecting rigidity of pigment granulation product |
Non-Patent Citations (3)
| Title |
|---|
| 《WC-Co硬质合金硬度和冲击韧性影响因素的变量搜索试验》;张正富, 等;《金属热处理》;20110531;全文 * |
| 《中国超细晶硬质合金及原料制备技术进展》;吴冲浒 等;《中国材料进展》;20120430;全文 * |
| 《公路工程集料试验规程 JTG E42-2005》;中华人民共和国交通部;《中华人民共和国行业标准》;20050303;35-36页 * |
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