CN103866171A - Sintering method of rare earth tungsten electrode blank strip - Google Patents
Sintering method of rare earth tungsten electrode blank strip Download PDFInfo
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- CN103866171A CN103866171A CN201210548813.5A CN201210548813A CN103866171A CN 103866171 A CN103866171 A CN 103866171A CN 201210548813 A CN201210548813 A CN 201210548813A CN 103866171 A CN103866171 A CN 103866171A
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Abstract
The invention discloses a sintering method of a rare earth tungsten electrode blank strip. Firstly, according to the weight percentage of the final product of the electrode components, adding La into a tungsten billet2O3、Y2O3、CeO2Or ZrO2One or more rare earth oxides; feeding the formed rare earth tungsten electrode blank strip into a cavity of a medium-frequency sintering furnace, and introducing hydrogen flow into the cavity(ii) a Starting the intermediate frequency sintering furnace, raising the temperature to 2000-2400 ℃ at a temperature raising rate of 100-300 ℃ per hour, setting more than 2 heat preservation points according to the material condition, and setting the heat preservation time of each heat preservation point to be 2-4 hours; and cutting off a power supply of the intermediate frequency sintering furnace, and taking out the sintered body after the temperature in the cavity is reduced to the normal temperature. The sintering method can provide the rare earth tungsten bars with uniform physical characteristics and high yield in large batch and high efficiency.
Description
Technical field
The present invention relates to powder metallurgical technology, relate in particular to a kind of sintering method of rare-earth tungsten electrode base bar.
Background technology
Tungsten is a kind of refractory metal, and fusing point reaches 3410 ℃, just becomes a kind of special technique so its one-tenth is made to regular shape.Tungsten adds after rare earth element, can effectively improve materials'use performance, but its forming process difficulty obviously increases, and prepare rare-earth tungsten electrode from rare earth tungsten strip and still need through very long technical process, generally comprise sintering → cogging → 203 to swage → 202 swage → 201 swage → chain type wire drawing → aligning → cut-out → polishings.
In prior art scheme, prepare rare-earth tungsten electrode and mainly adopt incipient fusion sintering, incipient fusion sintering is because its sintering process feature, cause tungsten strip thermograde large, sintered density consistence is poor, power consumption, hydrogen-consuming volume are large, sintering cost is high, and incipient fusion bar need cut two ends collet segment (4% left and right), the shortcomings such as lumber recovery reduction.
Summary of the invention
The object of this invention is to provide a kind of sintering method of rare-earth tungsten electrode base bar, adopt this sintering method that the rare earth that physical property is even, lumber recovery is high tungsten rod can in enormous quantities, be high efficiencyly provided.
The object of the invention is to be achieved through the following technical solutions, a kind of sintering method of rare-earth tungsten electrode base bar, described sintering method comprises:
Press the weight percent of final product according to electrode composition, in tungsten strip, add La
2o
3, Y
2o
3, CeO
2or ZrO
2in rare earth oxide one or more;
Rare-earth tungsten electrode base bar after moulding is sent in Median frequency sintering furnace cavity, in cavity, passed into hydrogen stream;
Start described Intermediate frequency sintering furnace, heat up with the temperature rise rate of 100-300 per hour ° C, be warmed up to 2000 ° of C-2400 ° of C, and be incubated a little above according to 2 of material situation settings, and the soaking time of each insulation point is 2-4 hour;
Cut off the power supply of described Intermediate frequency sintering furnace, be reduced to after normal temperature until temperature in cavity, take out sintered compact.
Described rare-earth tungsten electrode base strip adoption isostatic pressing, the base bar weight after moulding is 500-3000g, length 200-800mm.
The weight percent total content of one or more rare earth oxides that add is 0.3-4.0%.
As seen from the above technical solution provided by the invention, first press the weight percent of final product according to electrode composition, in tungsten strip, add La
2o
3, Y
2o
3, CeO
2or ZrO
2in rare earth oxide one or more; Rare-earth tungsten electrode base bar after moulding is sent in Median frequency sintering furnace cavity, in cavity, passed into hydrogen stream; Start described Intermediate frequency sintering furnace, heat up with the temperature rise rate of 100-300 per hour ° C, be warmed up to 2000 ° of C-2400 ° of C, and be incubated a little above according to 2 of material situation settings, and the soaking time of each insulation point is 2-4 hour; Cut off the power supply of described Intermediate frequency sintering furnace, be reduced to after normal temperature until temperature in cavity, take out sintered compact.Adopt this sintering method that the rare earth that physical property is even, lumber recovery is high tungsten rod can in enormous quantities, be high efficiencyly provided.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain other accompanying drawings according to these accompanying drawings.
The sintering method schematic flow sheet of the rare-earth tungsten electrode base bar that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the XRD result schematic diagram of embodiment of the present invention example gained rare-earth tungsten electrode;
Fig. 3 is the static characteristic of arc schematic diagram of embodiment of the present invention example gained rare-earth tungsten electrode.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to protection scope of the present invention.
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in further detail, is illustrated in figure 1 the sintering method schematic flow sheet of the rare-earth tungsten electrode base bar that the embodiment of the present invention provides, described sintering method comprises:
Step 11: press the weight percent of final product according to electrode composition, add lanthanum trioxide La in tungsten strip
2o
3, yttrium oxide Y
2o
3, cerium oxide CeO
2or zirconium white ZrO
2deng in rare earth oxide one or more.
In this step, the weight percent total content scope of one or more above-mentioned added rare earth oxides is 0.3-4.0%.
Step 12: the rare-earth tungsten electrode base bar after moulding is sent in Median frequency sintering furnace cavity, passed into hydrogen stream in cavity.
In this step, described rare-earth tungsten electrode base bar can adopt isostatic pressing, and the base bar weight after moulding is 500-3000g, length 200-800mm.
In specific implementation, because the sintering temperature of Medium frequency induction sintering is lower than incipient fusion sintering, heat up slow, uniform temperature fields, thus can improve tissue and the performance of goods.Here, Intermediate frequency sintering furnace is to utilize the principle of induction heating to heat material, medium mill converts electric energy to alternation magnetic energy, crucible in induction coil or sintered material are subject to the continuous cutting of alternating magnetic field, produce induced current, form eddy current and make crucible or material heating, thereby reach the object of sintering.Traditionally supply frequency is called to high frequency more than 10000Hz, 10000 ~ 1000Hz is called intermediate frequency, below 1000Hz, is called low frequency, and industrial production generally adopts the frequency of 2500Hz.
Step 13: start described Intermediate frequency sintering furnace, be warmed up to default high temperature, and be incubated above a little according to 2 of material situation settings.
In this step, starting after described Intermediate frequency sintering furnace, temperature rise rate that can 100-300 per hour ° C heats up, and is warmed up in 2000 ° of default C-2400 ° of C, and be incubated a little above according to 2 of material situation settings, and the soaking time of each insulation point is 2-4 hour.
Step 14: cut off the power supply of described Intermediate frequency sintering furnace, be reduced to after normal temperature until temperature in cavity, take out sintered compact.
With concrete example, above-mentioned sintering method is elaborated below:
Embodiment 1: first by La
2o
3content is 1.5%, and the weight after isostatic pressing is 500g, and the tungsten strip that length is 200mm is sent in Medium frequency induction furnace cavity, in cavity, passes into hydrogen stream; Start Intermediate frequency sintering furnace, heat up with the temperature rise rate of 100 ° of C per hour, be warmed up to 1200 ° of C, be incubated 2 hours, continue to be warmed up to 2000 ° of C, be incubated 4 hours; Cut off the electricity supply again, after the near normal temperature of temperature in cavity, take out sintered compact.
Embodiment 2: first by CeO
2content is 2%, and the weight after isostatic pressing is 1000g, and the tungsten strip that length is 500mm is sent in Medium frequency induction furnace cavity, in cavity, passes into hydrogen stream; Start Intermediate frequency sintering furnace, heat up with the temperature rise rate of 100 ° of C per hour, be warmed up to 1400 ° of C, be incubated 2 hours, continue to be warmed up to 2400 ° of C, be incubated 2 hours; Cut off the electricity supply, after the near normal temperature of temperature in cavity, take out sintered compact.
Embodiment 3: first by La
2o
3, Y
2o
3, CeO
2the total content of three kinds of rare earth oxides is 2.2%, and the weight after isostatic pressing is 1500g, and the tungsten strip that length is 400mm is sent in Medium frequency induction furnace cavity, in cavity, passes into hydrogen stream; Start Intermediate frequency sintering furnace, heat up with the temperature rise rate of 200 ° of C per hour, be warmed up to 1200 ° of C, be incubated 2 hours, continue to be warmed up to 2200 ° of C, be incubated 3 hours; Cut off the electricity supply, after the near normal temperature of temperature in cavity, take out sintered compact.
The rare-earth tungsten electrode base bar obtaining according to above-mentioned three embodiment, as shown in the table is the test density of above-mentioned three embodiment gained rare-earth tungsten electrode base bars:
Table 1
The XRD result schematic diagram of embodiment of the present invention example gained rare-earth tungsten electrode as shown in Figure 2, is illustrated in figure 3 the static characteristic of arc schematic diagram of embodiment of the present invention example gained rare-earth tungsten electrode.From above-mentioned test result: described in the embodiment of the present invention, sintering method compares to incipient fusion sintering, save energy, formation efficiency is high, and high through tungsten rod even density and the sintered density of sintering of the present invention, and processing characteristics is good, and yield rate is high.
The above; only for preferably embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (3)
1. a sintering method for rare-earth tungsten electrode base bar, is characterized in that, described sintering method comprises:
Press the weight percent of final product according to electrode composition, in tungsten strip, add La
2o
3, Y
2o
3, CeO
2or ZrO
2in rare earth oxide one or more;
Rare-earth tungsten electrode base bar after moulding is sent in Median frequency sintering furnace cavity, in cavity, passed into hydrogen stream;
Start described Intermediate frequency sintering furnace, heat up with the temperature rise rate of 100-300 per hour ° C, be warmed up to 2000 ° of C-2400 ° of C, and be incubated a little above according to 2 of material situation settings, and the soaking time of each insulation point is 2-4 hour;
Cut off the power supply of described Intermediate frequency sintering furnace, be reduced to after normal temperature until temperature in cavity, take out sintered compact.
2. the sintering method of rare-earth tungsten electrode base bar according to claim 1, is characterized in that, described rare-earth tungsten electrode base strip adoption isostatic pressing, and the base bar weight after moulding is 500-3000g, length 200-800mm.
3. the sintering method of rare-earth tungsten electrode base bar according to claim 1, is characterized in that,
The weight percent total content of one or more rare earth oxides that add is 0.3-4.0%.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104117673A (en) * | 2014-08-14 | 2014-10-29 | 山东华业钨钼股份有限公司 | Method for sintering tungsten blank bars through intermediate frequency furnace |
| CN105328178A (en) * | 2015-09-25 | 2016-02-17 | 北矿新材科技有限公司 | Preparation method of intermediate-frequency sintering thorium-tungsten billets |
| CN106834780A (en) * | 2017-01-20 | 2017-06-13 | 赣州有色冶金研究所 | A kind of W-REO alloys and preparation method thereof |
| CN106956088A (en) * | 2017-04-11 | 2017-07-18 | 北京天鹏钨钼科技有限公司 | Tungsten electrode core wire containing multielement rare earth element and preparation method thereof |
| CN107604186A (en) * | 2017-09-15 | 2018-01-19 | 江西理工大学 | A kind of composite rare-earth oxide strengthens tungsten base high-specific-gravity alloy composite and preparation method thereof |
| CN107988539A (en) * | 2017-11-28 | 2018-05-04 | 北京工业大学 | A kind of quick method for preparing high-compactness fine grained texture xenon flash lamp electrode |
| CN108772558A (en) * | 2018-06-15 | 2018-11-09 | 赣州有色冶金研究所 | A kind of compound tungsten crucible of multielement rare earth and its preparation method and application |
| CN110788318A (en) * | 2019-10-29 | 2020-02-14 | 安泰天龙（宝鸡）钨钼科技有限公司 | Preparation method of high-density rare earth tungsten electrode |
| CN111041315A (en) * | 2019-11-27 | 2020-04-21 | 洛阳爱科麦钨钼科技股份有限公司 | Quaternary composite rare earth tungsten alloy electrode material and preparation method thereof |
| CN112011703A (en) * | 2020-09-04 | 2020-12-01 | 合肥工业大学 | High-hardness composite oxide dispersion strengthening ODS tungsten alloy and preparation method thereof |
| CN112159920A (en) * | 2020-09-02 | 2021-01-01 | 鹤山市沃得钨钼实业有限公司 | Rare earth tungsten alloy electrode material and preparation method thereof |
| CN114196862A (en) * | 2021-12-21 | 2022-03-18 | 厦门欧斯拓科技有限公司 | Rare earth composite material |
| CN114250394A (en) * | 2021-12-21 | 2022-03-29 | 厦门欧斯拓科技有限公司 | Energy-releasing destroying element and preparation method thereof |
| CN114657481A (en) * | 2022-03-08 | 2022-06-24 | 厦门欧斯拓科技有限公司 | Preparation method of rare earth composite material |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104117673B (en) * | 2014-08-14 | 2016-08-17 | 山东华业钨钼股份有限公司 | The method of intermediate frequency furnace sintered tungsten billet |
| CN104117673A (en) * | 2014-08-14 | 2014-10-29 | 山东华业钨钼股份有限公司 | Method for sintering tungsten blank bars through intermediate frequency furnace |
| CN105328178A (en) * | 2015-09-25 | 2016-02-17 | 北矿新材科技有限公司 | Preparation method of intermediate-frequency sintering thorium-tungsten billets |
| CN105328178B (en) * | 2015-09-25 | 2017-10-31 | 北矿新材科技有限公司 | A kind of preparation method of Median frequency sintering thorium tungsten strip |
| CN106834780A (en) * | 2017-01-20 | 2017-06-13 | 赣州有色冶金研究所 | A kind of W-REO alloys and preparation method thereof |
| CN106956088B (en) * | 2017-04-11 | 2019-03-15 | 北京天鹏钨钼科技有限公司 | Tungsten electrode core wire containing multielement rare earth element and preparation method thereof |
| CN106956088A (en) * | 2017-04-11 | 2017-07-18 | 北京天鹏钨钼科技有限公司 | Tungsten electrode core wire containing multielement rare earth element and preparation method thereof |
| CN107604186A (en) * | 2017-09-15 | 2018-01-19 | 江西理工大学 | A kind of composite rare-earth oxide strengthens tungsten base high-specific-gravity alloy composite and preparation method thereof |
| CN107988539A (en) * | 2017-11-28 | 2018-05-04 | 北京工业大学 | A kind of quick method for preparing high-compactness fine grained texture xenon flash lamp electrode |
| CN108772558A (en) * | 2018-06-15 | 2018-11-09 | 赣州有色冶金研究所 | A kind of compound tungsten crucible of multielement rare earth and its preparation method and application |
| CN110788318A (en) * | 2019-10-29 | 2020-02-14 | 安泰天龙（宝鸡）钨钼科技有限公司 | Preparation method of high-density rare earth tungsten electrode |
| CN110788318B (en) * | 2019-10-29 | 2022-08-12 | 安泰天龙（宝鸡）钨钼科技有限公司 | Preparation method of high-density rare earth tungsten electrode |
| CN111041315A (en) * | 2019-11-27 | 2020-04-21 | 洛阳爱科麦钨钼科技股份有限公司 | Quaternary composite rare earth tungsten alloy electrode material and preparation method thereof |
| CN112159920A (en) * | 2020-09-02 | 2021-01-01 | 鹤山市沃得钨钼实业有限公司 | Rare earth tungsten alloy electrode material and preparation method thereof |
| CN112011703A (en) * | 2020-09-04 | 2020-12-01 | 合肥工业大学 | High-hardness composite oxide dispersion strengthening ODS tungsten alloy and preparation method thereof |
| CN114196862A (en) * | 2021-12-21 | 2022-03-18 | 厦门欧斯拓科技有限公司 | Rare earth composite material |
| CN114250394A (en) * | 2021-12-21 | 2022-03-29 | 厦门欧斯拓科技有限公司 | Energy-releasing destroying element and preparation method thereof |
| CN114250394B (en) * | 2021-12-21 | 2022-07-15 | 厦门欧斯拓科技有限公司 | Energy-releasing wound-destroying element and preparation method thereof |
| CN114657481A (en) * | 2022-03-08 | 2022-06-24 | 厦门欧斯拓科技有限公司 | Preparation method of rare earth composite material |
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