CN1070601A - 具有高强度的注射成型纯铁烧结材料的制造方法 - Google Patents
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- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000002347 injection Methods 0.000 title claims abstract description 9
- 239000007924 injection Substances 0.000 title claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 5
- 239000011230 binding agent Substances 0.000 claims abstract description 16
- 238000005238 degreasing Methods 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 6
- 238000010298 pulverizing process Methods 0.000 claims abstract description 5
- 238000009766 low-temperature sintering Methods 0.000 claims abstract description 3
- 238000001746 injection moulding Methods 0.000 claims description 17
- 238000003801 milling Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 abstract description 2
- 238000005245 sintering Methods 0.000 description 10
- 239000007787 solid Substances 0.000 description 10
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- 239000000428 dust Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
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- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1017—Multiple heating or additional steps
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- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the subgroups H01L21/06 - H01L21/326
- H01L21/4803—Insulating or insulated parts, e.g. mountings, containers, diamond heatsinks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
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Abstract
具有高强度的注射成型纯铁烧结材料的制造方
法,由以下工艺步骤构成:将纯铁粉末和占总体重量
8—15%的热塑性树脂粘结剂混炼,然后粉碎,由粉
碎后的材料成型得到注射成型体,将该注射成型体在
680—750℃温度下高温脱脂成为预烧结体,其中来
源于粘结剂的碳的含量在0.05%(重量)以下,最后
将该预烧结体在870—910℃下进行低温烧结。
Description
本发明是关于将注射成形体在高温下脱脂、制成碳含量极低的予烧结体,再将该予烧结体在低温下烧结、使之高密度化,从而制造出具有高强度的注射成形纯铁烧结材料的方法。
以往,已知的注射成形纯铁烧结材料的制造方法一般是由以下步骤构成:在平均颗粒直径在15μm以下的羰基铁粉等纯铁粉末中加入占总体重量8-15%的热塑性树脂粘结剂,用捏合机在135℃的温度下加热混炼3小时,待温度降低到室温后在捏合机内将其粉碎,使之成为直径1-5mm左右的颗粒料,用注射成形机在压力为500-700kgf/cm2、颗粒料温度130-145℃、成形周期为20-40秒/次的条件下将上述颗粒料注射成形,制成具有规定形状的成形体,接着,将该注射成形体在例如氢等还原性气氛中于300-500℃温度下脱脂,为了保持形状,在上述粘结剂还剩留10-20%(重量)的时候即停止脱脂,然后,将结果得到的理论密度比为50-70%的脱脂成形体同样在氢等还原气氛中、在1100-1400℃温度下进行长时间(10-20小时)烧结,以便将上述粘结剂完全除去。此外,人们还知道,用这种方法制造的注射成形纯铁烧结材料可以用来作为各种电气电子仪器的结构部件。
近年来,伴随着各种电气电子仪器、设备的减轻劳动、减小重量以及小型化的趋势,要求其结构部件薄壁化,但是,上述现有技术的注射成形纯铁烧结材料不具备足够的强度,因此无法满足这一要求。
鉴于以上所述,要求制造出具有高强度的注射成形纯铁烧结材料。因此,本发明人对此进行了研究,得到了下述研究结果。
如前所述,在现有技术方法中,注射成形体的脱脂是在300-500℃温度下进行的,而且,为了保持形状,在还存留有相当数量的粘结剂的情况下即终止脱脂处理,而在680-750℃的高温下对注射成形体进行脱脂,可将粘结剂几乎全部除掉,得到碳含量在0.05%(重量),以下的预烧结体(理论密度比为60-70%),另外,在现有技术方法中,后续的烧结是在1100-1400℃长时间保持,用现有技术方法只能得到理论密度比为90-95%左右的注射成形纯铁烧结材料,与此相比,如果在870-910℃的较低温度下进行后续烧结,在1-5小时的短时间内即可得到理论密度比为96-99%的高密度注射成形纯铁烧结材料,所得到的注射成形纯铁烧结材料由于上述高密度而具有高的强度。
本发明是基于上述研究结果而做出的,其特征是,在纯铁粉末中加入占总体重量8-15%的热塑性树脂粘结剂,将其加热混炼,在室温下粉碎后,用注射成形机制成成形体,接着将上述注射成形体在680-750℃的温度下高温脱脂,使来源于上述粘结剂的碳的含量在0.05%(重量)以下,形成预烧结体,然后将该预烧结体在870-910℃的温度下低温烧结,从而制成具有高强度的注射成形纯铁烧结材料。
下面说明在本发明的方法中将制造条件做上述限定的根据。
(a)粘结剂的比例
粘结剂的比例如不足8%(重量)则不能确保注射成形性,反之,如这一比例超过15%(重量),则不能制成具有96%以上理论密度比的高密度注射成形纯铁烧结材料,不能保证所要求的高强度,因此将粘结剂的比例定为8-15%(重量)。
(b)脱脂温度
脱脂温度如果低于680℃,预烧结不充分、难以保持形状,而且脱脂需要很长时间;反之,脱脂温度如超过750℃,要想使烧结后的注射成形纯铁烧结材料达到理论密度比为96%以上的高密度是不可能的,因此将这一温度定为680-750℃。
(c)预烧结体的碳含量
如果降低预烧结体的碳含量,纯铁烧结材料的理论密度比就会提高,碳含量如果超过0.05%(重量),纯铁烧结材料的理论密度比就达不到96%,不能保证高强度,因此将该含量定为0.05%(重量)以下。
(d)烧结温度
烧结温度在870℃以下时,不仅烧结不充分,而且不能使纯铁烧结材料的密度提高,反之,如果该温度超过910℃也不能实现所希望的密度提高,而且由于晶粒长大,不能够得到所希望的高强度,因此将烧结温度定在870-910℃。
实施例
下面,通过实施例来说明本发明的方法。
将具有表1中所示平均颗粒直径的羰基铁粉与热塑性树脂粘结剂按表1中所示的比例混合,热塑性树脂粘结剂是以乙烯乙酸乙烯共聚物和石蜡为主要成份构成。用捏和机在135℃温度下将上述混合物加热混炼3小时,再用捏和机在室温下将其粉碎,制成以颗粒大小分布在1-5mm范围内的颗粒为主体的颗粒料,然后,用注射成形机在压力为600kgf/cm2、颗粒料温度140℃、成形周期为30秒/次的条件下将上述颗粒料注射成形,形成平面尺寸为30mm×40mm、厚度1.5mm的注射成形体,在表1中所示的条件下对该注射成形体进行脱脂处理,得到具有表1中所示理论密度比及碳含量的预烧结体或脱脂成形体,然后按表1中所示的条件对其进行烧结处理,从而实施本发明方法1-5和现有技术方法1-5,分别制成注射成形纯铁烧结材料。
随后,测定所得到的纯铁烧结材料的理论密度比和抗拉强度,测试结果示于表2中。
表2
由表1和表2中所示的结果可以看出,采用本发明的方法1-5制造的纯铁烧结材料均比按现有技术方法1-5制造的纯铁烧结材料的密度高,因而具有更高的强度。
前已述及,采用本发明的方法可以制造具有高强度的注射成形纯铁烧结材料,因而在用作各种电气、电子仪器设备的结构部件时可以实现薄壁化,有助于节省劳力、减轻重量以及机器的小型化,在工业生产上带来了有益的效果。
Claims (1)
1、具有高强度的注射成形纯铁烧结材料的制造方法,其特征是,在纯铁粉末中加入占总体重量8-15%的热塑性树脂粘结剂,加热混炼、在室温下粉碎后用注射成形机使之成为成形体,接着在680-750℃温度下将上述注射成形体高温脱脂,形成预烧结体,其中来源于上述粘结剂的碳的含量在0.05%(重量)以下,然后将该预烧结体在870-910℃温度下进行低温烧结。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP200113/91 | 1991-07-15 | ||
JP3200113A JPH0521220A (ja) | 1991-07-15 | 1991-07-15 | 高い残留磁束密度を有する射出成形純鉄焼結軟磁性材の製造法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1070601A true CN1070601A (zh) | 1993-04-07 |
CN1030290C CN1030290C (zh) | 1995-11-22 |
Family
ID=16419048
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN92109517A Expired - Fee Related CN1030290C (zh) | 1991-07-15 | 1992-07-15 | 具有高强度的注射成型纯铁烧结材料的制造方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US5277867A (zh) |
EP (1) | EP0523651B1 (zh) |
JP (1) | JPH0521220A (zh) |
KR (1) | KR930002024A (zh) |
CN (1) | CN1030290C (zh) |
DE (1) | DE69217753D1 (zh) |
MY (1) | MY107712A (zh) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101264517B (zh) * | 2007-03-15 | 2011-04-13 | 精工爱普生株式会社 | 成形体形成用组合物、脱脂体及烧结体 |
CN102695471A (zh) * | 2009-08-27 | 2012-09-26 | Wdt沃尔茨口腔科技有限公司 | 用于由牙科用金属粉末制造假牙部件的方法 |
CN105733499A (zh) * | 2016-01-29 | 2016-07-06 | 合肥工业大学 | 一种用于高强度金属注射成型的粘结剂组元及其制备方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5988689A (en) * | 1997-12-26 | 1999-11-23 | Central Plastics Company | Heat-shrinkable electrofusion fittings and methods |
JP2002098599A (ja) * | 2000-09-27 | 2002-04-05 | Toyoda Mach Works Ltd | トルクセンサ |
DE102013010237A1 (de) * | 2013-06-18 | 2014-12-18 | Elino Industrie-Ofenbau Gmbh | Verfahren und Anlage zum Entbindern und Sintern von Teilen |
CN104043835A (zh) * | 2014-06-03 | 2014-09-17 | 宝得粉末注射成形(常熟)有限公司 | 电脑针织横编机用的压脚控制凸轮的加工方法 |
KR102326946B1 (ko) | 2020-10-15 | 2021-11-16 | 이남호 | 낱개형 쌈장 및 이의 제조방법 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3411902A (en) * | 1968-01-22 | 1968-11-19 | Mallory & Co Inc P R | Method of producing infiltrated contact material |
US4492671A (en) * | 1982-03-15 | 1985-01-08 | Leland Stanford Junior University | Method for consolidation of iron-based alloy powder by cyclic phase transformation under pressure |
DE3587977T2 (de) * | 1984-02-28 | 1995-05-18 | Sumitomo Spec Metals | Dauermagnete. |
US4885133A (en) * | 1986-01-14 | 1989-12-05 | Sumitomo Electric Industries, Ltd. | Wear-resistant sintered iron-based alloy and process for producing the same |
JPH0686608B2 (ja) * | 1987-12-14 | 1994-11-02 | 川崎製鉄株式会社 | 金属粉末射出成形による鉄焼結体の製造方法 |
WO1989012112A1 (en) * | 1988-05-30 | 1989-12-14 | Kawasaki Steel Corporation | SINTERED MAGNETIC Fe-Co MATERIAL AND PROCESS FOR ITS PRODUCTION |
JPH0647684B2 (ja) * | 1989-01-20 | 1994-06-22 | 川崎製鉄株式会社 | 射出成形体の脱脂方法 |
JPH0394045A (ja) * | 1989-09-06 | 1991-04-18 | Brother Ind Ltd | 低膨脹焼結合金成形品 |
-
1991
- 1991-07-15 JP JP3200113A patent/JPH0521220A/ja not_active Withdrawn
-
1992
- 1992-07-14 KR KR1019920012511A patent/KR930002024A/ko not_active Application Discontinuation
- 1992-07-14 MY MYPI92001205A patent/MY107712A/en unknown
- 1992-07-15 EP EP92112061A patent/EP0523651B1/en not_active Expired - Lifetime
- 1992-07-15 CN CN92109517A patent/CN1030290C/zh not_active Expired - Fee Related
- 1992-07-15 US US07/914,856 patent/US5277867A/en not_active Expired - Fee Related
- 1992-07-15 DE DE69217753T patent/DE69217753D1/de not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101264517B (zh) * | 2007-03-15 | 2011-04-13 | 精工爱普生株式会社 | 成形体形成用组合物、脱脂体及烧结体 |
CN102695471A (zh) * | 2009-08-27 | 2012-09-26 | Wdt沃尔茨口腔科技有限公司 | 用于由牙科用金属粉末制造假牙部件的方法 |
CN102695471B (zh) * | 2009-08-27 | 2015-05-13 | Wdt沃尔茨口腔科技有限公司 | 用于由牙科用金属粉末制造假牙部件的方法 |
CN105733499A (zh) * | 2016-01-29 | 2016-07-06 | 合肥工业大学 | 一种用于高强度金属注射成型的粘结剂组元及其制备方法 |
CN105733499B (zh) * | 2016-01-29 | 2018-05-11 | 合肥工业大学 | 一种用于高强度金属注射成型的粘结剂组元及其制备方法 |
Also Published As
Publication number | Publication date |
---|---|
JPH0521220A (ja) | 1993-01-29 |
EP0523651A2 (en) | 1993-01-20 |
KR930002024A (ko) | 1993-02-22 |
CN1030290C (zh) | 1995-11-22 |
EP0523651A3 (en) | 1993-04-21 |
EP0523651B1 (en) | 1997-03-05 |
MY107712A (en) | 1996-05-30 |
DE69217753D1 (de) | 1997-04-10 |
US5277867A (en) | 1994-01-11 |
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