JPH04362152A - Manufacture of ferrous sintered body - Google Patents
Manufacture of ferrous sintered bodyInfo
- Publication number
- JPH04362152A JPH04362152A JP3162291A JP16229191A JPH04362152A JP H04362152 A JPH04362152 A JP H04362152A JP 3162291 A JP3162291 A JP 3162291A JP 16229191 A JP16229191 A JP 16229191A JP H04362152 A JPH04362152 A JP H04362152A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- weight
- sintering
- tin
- iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 title 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000005245 sintering Methods 0.000 claims abstract description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 17
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 13
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 13
- 239000001257 hydrogen Substances 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 abstract description 4
- 239000010949 copper Substances 0.000 abstract description 4
- 239000011812 mixed powder Substances 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 238000010276 construction Methods 0.000 abstract 1
- 229910052718 tin Inorganic materials 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000009766 low-temperature sintering Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- -1 iron-copper-tin-carbon Chemical compound 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- IYRDVAUFQZOLSB-UHFFFAOYSA-N copper iron Chemical compound [Fe].[Cu] IYRDVAUFQZOLSB-UHFFFAOYSA-N 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000009692 water atomization Methods 0.000 description 2
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- QPBIPRLFFSGFRD-UHFFFAOYSA-N [C].[Cu].[Fe] Chemical compound [C].[Cu].[Fe] QPBIPRLFFSGFRD-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、低温焼結を可能とする
一般構造用鉄系焼結体の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing iron-based sintered bodies for general structural use, which enables low-temperature sintering.
【０００２】0002
【従来の技術およびその問題点】鉄系焼結体からなる一
般構造部品は、通常、１１００〜１１５０℃で焼結され
る。これら焼結体において、液相焼結は周知であり、銅
添加の場合の液相発生温度は１０８０℃以上を要する。
しかしながら、これら鉄系焼結体を焼結する際、より低
温焼結が可能であれば、省エネルギー、設備寿命の延長
が図られることになり、重要な課題となっている。BACKGROUND OF THE INVENTION General structural parts made of iron-based sintered bodies are usually sintered at 1100 to 1150°C. In these sintered bodies, liquid phase sintering is well known and requires a liquid phase generation temperature of 1080° C. or higher when copper is added. However, when sintering these iron-based sintered bodies, if lower temperature sintering is possible, energy saving and equipment life extension can be achieved, which is an important issue.
【０００３】より低温での焼結を可能とするに、銅以外
の添加元素として、錫、リン、硼素等が研究ないし、実
用化されている。例えば、鉄−銅急冷凝固粉に錫粉を０
．３〜４重量％添加する方法が特開昭６２−２７０７４
７号公報に開示されている。In order to enable sintering at lower temperatures, tin, phosphorus, boron, etc. have been researched or put into practical use as additive elements other than copper. For example, tin powder is added to iron-copper rapidly solidified powder.
．． A method of adding 3 to 4% by weight is disclosed in JP-A-62-27074.
It is disclosed in Publication No. 7.
【０００４】しかしながら、特開昭６２−２７０７４７
公報記載の発明では、鉄−銅急冷凝固粉に錫粉を０．３
〜４重量％混入しているが、本発明における水アトマイ
ズされたままの乾燥青銅粉中の錫粉量換算値は０．１３
〜０．７５重量％であるのに対して、高価でしかも価格
変動の大きい錫粉を比較的大量に用いるため、低温焼結
によるエネルギーコスト、設備及び設備維持コスト低減
よりも原材料費のコストアップの方が大きく、経済的で
ないという問題点を有する。However, Japanese Patent Application Laid-Open No. 62-270747
In the invention described in the publication, 0.3% of tin powder is added to iron-copper rapidly solidified powder.
~4% by weight of tin powder is mixed in, but the equivalent amount of tin powder in the dry bronze powder as water atomized in the present invention is 0.13
~0.75% by weight, but because a relatively large amount of tin powder, which is expensive and whose price fluctuates widely, is used, the cost of raw materials increases more than the reduction in energy costs, equipment, and equipment maintenance costs due to low-temperature sintering. is larger and has the problem of being uneconomical.
【０００５】本発明の目的は、通常の１１００〜１１５
０℃より低い９５０〜１０５０℃の焼結で、十分な強度
を有する、鉄−銅−錫−炭素系焼結体を経済的に製造す
る方法を提供することにある。[0005] The purpose of the present invention is to
The object of the present invention is to provide a method for economically producing an iron-copper-tin-carbon based sintered body having sufficient strength by sintering at a temperature of 950 to 1050°C, which is lower than 0°C.
【０００６】[0006]
【問題点を解決するための手段】本発明は、鉄粉に、錫
９〜１５重量％、２００メッシュ以下の粒度の割合が９
５重量％以上で水素還元減量が０．１８重量％以上であ
る水アトマイズされたままの乾燥青銅粉１．５〜５．０
重量％と、黒鉛粉末１．０重量％以下とを混合して成形
した圧粉体を、非酸化雰囲気中９５０〜１０５０℃で焼
結することにより、前記問題点を解決したものである。[Means for Solving the Problems] The present invention provides iron powder containing 9 to 15% by weight of tin and a particle size of 200 mesh or less at a ratio of 9 to 15% by weight.
Dry bronze powder as water atomized with a hydrogen reduction loss of 0.18% by weight or more at 5% by weight or more 1.5 to 5.0% by weight
The above-mentioned problem is solved by sintering a green compact formed by mixing 1.0% by weight or less of graphite powder and 1.0% by weight or less of graphite powder in a non-oxidizing atmosphere at 950 to 1050°C.
【０００７】本発明に用いられる鉄粉は、一般的に大量
生産されている市販品である。また、本発明で用いる水
アトマイズ青銅粉は水アトマイズされたままのものとす
る。通常、水アトマイズ青銅粉は、水アトマイズされた
ままでは粉末成形工程で問題を生じるので焼鈍工程を加
えて水アトマイズ−乾燥−焼鈍−解砕−分級、調合なる
工程を経て出荷される。この青銅粉は還元雰囲気中で焼
鈍されているので、酸化度の目安となる水素還元減量は
０．２重量％以下、通常は約０．１重量％である。しか
るに本発明では水アトマイズされたままの青銅粉であっ
て、好ましくは粒度が−２００メッシュ以下の割合が９
５重量％以上の微細で水素還元減量が０．１８重量％以
上で僅かに酸化されている乾燥したものとし、これを鉄
粉への添加量が１．５〜５．０重量％となるように添加
する。本発明は、このような特定の水アトマイズ青銅粉
を上記のような量で添加しても粉末成形工程に何らの悪
影響をも及ぼさないことの知見に基づくものである。一
般に、粒度が細かくなるほど焼結されやすくなり、また
酸化されていると還元雰囲気下での焼結時、焼結が促進
される。本発明はこれを利用し、水アトマイズ後、乾燥
された青銅粉を制御された条件の下で使用することによ
り、鉄−銅−錫−炭素系焼結体の９５０〜１０５０℃で
の経済的な低温焼結を実現したものである。[0007] The iron powder used in the present invention is generally a commercially available product that is mass-produced. Further, the water-atomized bronze powder used in the present invention is the water-atomized bronze powder. Usually, water atomized bronze powder causes problems in the powder molding process if water atomized, so it is shipped after undergoing an annealing process, water atomization, drying, annealing, crushing, classification, and blending. Since this bronze powder is annealed in a reducing atmosphere, the hydrogen reduction loss, which is a measure of the degree of oxidation, is 0.2% by weight or less, usually about 0.1% by weight. However, in the present invention, the water atomized bronze powder preferably has a particle size of -200 mesh or less at a ratio of 9.
A fine powder of 5% by weight or more, slightly oxidized and with a hydrogen reduction loss of 0.18% by weight or more, and the amount added to the iron powder is 1.5 to 5.0% by weight. Add to. The present invention is based on the finding that the addition of such specific water atomized bronze powder in the above amount does not have any adverse effect on the powder compacting process. Generally, the finer the particle size, the easier it is to sinter, and if it is oxidized, sintering will be promoted during sintering in a reducing atmosphere. The present invention takes advantage of this, and by using water atomized and dried bronze powder under controlled conditions, it is possible to economically produce iron-copper-tin-carbon based sintered bodies at 950-1050℃. This achieved low-temperature sintering.
【０００８】なお、上記青銅粉の粒度が−２００メッシ
ュのものの割合が９５重量％未満であると、９００〜１
０５０℃での低温焼結時に焼結品の機械的特性が劣り、
また水素還元減量が０．１８重量％未満でも同様に特性
が劣るようになる。水素還元減量を０．３重量％以上に
すると機械的強度はさらに向上するが、０．３重量％以
上にするには青銅粉の強制的な酸化が必要になり、この
制御が難しくなり、経済的でなくなる。[0008] If the proportion of the bronze powder having a particle size of -200 mesh is less than 95% by weight,
The mechanical properties of the sintered product are poor during low-temperature sintering at 050℃,
Furthermore, if the hydrogen reduction loss is less than 0.18% by weight, the properties will be similarly inferior. Mechanical strength is further improved when the hydrogen reduction loss is increased to 0.3% by weight or more; however, increasing the hydrogen reduction loss to 0.3% by weight or more requires forced oxidation of the bronze powder, which becomes difficult to control and therefore economically disadvantageous. It becomes irrelevant.
【０００９】液相焼結作用を利用する水アトマイズされ
たままの乾燥青銅粉の組成については、Ｃｕ−１０重量
％Ｓｎ組成が一般的であり、Ｓｎ量を増やすほど融点が
下がって、より低温での焼結が可能であるが、高価なＳ
ｎ量が増えて経済的でなくなるので、組成については９
〜１５重量％Ｓｎが好ましい。また、水アトマイズされ
たままの乾燥青銅粉の添加量については、１．５重量％
未満では鉄−銅−錫−炭素系焼結体の引張強さは比較例
１に示す現行の１１３０℃で焼結した鉄−銅−炭素焼結
体の引張強さに比較しても十分でなく、１．５重量％以
上が好ましい。また、添加量が増えるほど引張強さは向
上するが、５重量％を超えるとその効果が著しくなくな
り、また経済的でなくなるので、１．５〜５．０重量％
の範囲が好ましい。[0009] Regarding the composition of dry bronze powder that has been water atomized and uses liquid phase sintering, a Cu-10% by weight Sn composition is generally used. Sintering is possible, but expensive S
Since the amount of n increases and it becomes uneconomical, the composition should be 9.
~15% by weight Sn is preferred. In addition, the amount of dry bronze powder added after water atomization is 1.5% by weight.
If the temperature is lower than The content is preferably 1.5% by weight or more. In addition, the tensile strength improves as the amount added increases, but if it exceeds 5% by weight, the effect will be significantly lost and it will become uneconomical, so 1.5 to 5.0% by weight
A range of is preferred.
【００１０】焼結温度については、９５０℃未満では引
張強さは十分でなく、１０５０℃を超すと、焼結コスト
は鉄−銅−炭素系圧粉体を１１００〜１１５０℃で焼結
する場合と大差なくなり、経済的でないため、焼結温度
は９５０〜１０５０℃の範囲が好ましい。Regarding the sintering temperature, if the tensile strength is lower than 950°C, the tensile strength will not be sufficient, and if it exceeds 1050°C, the sintering cost will be lower than when iron-copper-carbon compact is sintered at 1100 to 1150°C. The sintering temperature is preferably in the range of 950 to 1050°C because there is not much difference between the two and it is not economical.
【００１１】黒鉛粉末の添加量については、他の一般的
な焼結機械構造用部品と同じく１．０重量％以下とする
。The amount of graphite powder added is 1.0% by weight or less, as in other general sintered mechanical structural parts.
【００１２】0012
【発明の効果】以上のような本発明によれば、微細で制
御された水素還元減量を持つ水アトマイズされたままの
乾燥青銅粉の液相焼結作用により、９５０〜１０５０℃
で低温焼結して鉄−銅−錫−炭素系焼結体を製造した場
合に、１１００〜１１５０℃において焼結した鉄−銅−
炭素系焼結体と同程度以上の引張強度が得られ、しかも
低温焼結により、焼結炉のエネルギー費、設備費及び設
備維持費の節減ができ、焼結体に含有されることになる
高価な錫の使用量が従来に比べて少ないので、より経済
的に鉄−銅−錫−炭素系焼結体が製造できる。Effects of the Invention According to the present invention as described above, by the liquid phase sintering action of dry bronze powder that has been water atomized and has a fine and controlled hydrogen reduction loss, it is possible to
When an iron-copper-tin-carbon-based sintered body is produced by low-temperature sintering at 1100 to 1150°C,
Tensile strength comparable to or higher than that of carbon-based sintered bodies can be obtained, and low-temperature sintering reduces energy costs, equipment costs, and equipment maintenance costs for sintering furnaces, and it is included in sintered bodies. Since the amount of expensive tin used is smaller than in the past, iron-copper-tin-carbon based sintered bodies can be produced more economically.
【００１３】[0013]
【実施例１】市販の鉄粉９７．７重量％に、水素還元減
量が０．１９重量％、２００メッシュ以下の粒度の割合
が９８重量％である水アトマイズされたままの乾燥した
Ｃｕ−１０重量％Ｓｎ青銅粉を２．０重量％と、市販の
黒鉛粉０．３重量％と、鉄−青銅−炭素混合粉１００重
量％に対して、１．０重量％の潤滑剤（ステアリン酸亜
鉛）とを混合し、焼結密度が６．３ｇ／ｃｍ３となるよ
うに成形して、ＲＸガス（ブタン変性ガス）中１０００
℃で焼結した。この鉄−１．８重量％銅−０．２重量％
錫−０．３重量％炭素焼結体の引張強さは表１に示すよ
うに２０．５ｋｇｆ／ｍｍ２であった。[Example 1] Dry water atomized Cu-10 containing commercially available iron powder of 97.7% by weight, hydrogen reduction loss of 0.19% by weight, and particle size ratio of 200 mesh or less of 98% by weight. 2.0% by weight of Sn bronze powder, 0.3% by weight of commercially available graphite powder, and 100% by weight of iron-bronze-carbon mixed powder, 1.0% by weight of lubricant (zinc stearate) ), molded to have a sintered density of 6.3 g/cm3, and sintered in RX gas (butane modified gas) at 1000 g/cm3.
Sintered at °C. This iron - 1.8% by weight, copper - 0.2% by weight
The tensile strength of the tin-0.3% by weight carbon sintered body was 20.5 kgf/mm2 as shown in Table 1.
【００１４】[0014]
【実施例２】市販の鉄粉に、水素還元減量が０．２６重
量％、２００メッシュ以下の粒度の割合が９９．８重量
％である水アトマイズされたままの乾燥したＣｕ−１０
重量％Ｓｎ青銅粉をそれぞれ２重量％、３重量％、５重
量％添加し、黒鉛粉０．３重量％一定、潤滑剤（ステア
リン酸亜鉛）を鉄−青銅−炭素混合粉に対して１重量％
一定でそれぞれ添加して混合し、焼結密度が６．３ｇ／
ｃｍ３となるように成形してＲＸガス中１０００℃及び
１０５０℃で焼結した。得られた焼結体の引張強さと乾
燥Ｃｕ−１０重量％Ｓｎ青銅粉添加量及び焼結温度との
関係を表１に示す。この表１に見られるように、引っ張
り強さは２１〜２６ｋｇｆ／ｍｍ２であった。[Example 2] Dry Cu-10, which has been water atomized and has a hydrogen reduction loss of 0.26% by weight and a particle size of 200 mesh or less of 99.8% by weight, is added to commercially available iron powder.
Weight% Sn bronze powder was added at 2%, 3%, and 5% by weight, respectively, graphite powder was constant at 0.3% by weight, and lubricant (zinc stearate) was added at 1% by weight relative to the iron-bronze-carbon mixed powder. %
By adding each at a constant rate and mixing, the sintered density was 6.3g/
It was molded to a size of cm3 and sintered at 1000°C and 1050°C in RX gas. Table 1 shows the relationship between the tensile strength of the obtained sintered body, the amount of dry Cu-10% by weight Sn bronze powder added, and the sintering temperature. As seen in Table 1, the tensile strength was 21 to 26 kgf/mm2.
【００１５】[0015]
【比較例１】水アトマイズされたままの乾燥したＣｕ−
１０重量％Ｓｎ青銅粉の代わりに、市販の電解銅粉を用
い、１１３０℃で焼結した以外は実施例１と同様に処理
した場合の、鉄−２重量％銅−０．３重量％炭素焼結体
の引張強さは表１に示すように、２１ｋｇｆ／ｍｍ２で
あった。[Comparative Example 1] Dried Cu- as water atomized
Iron-2 wt% copper-0.3 wt% carbon when treated in the same manner as in Example 1 except that commercially available electrolytic copper powder was used instead of the 10 wt% Sn bronze powder and sintered at 1130°C. As shown in Table 1, the tensile strength of the sintered body was 21 kgf/mm2.
【００１６】[0016]
【比較例２】２００メッシュ以下の粒度の割合が９２重
量％であること以外は実施例１と同様に処理した場合の
、焼結体の引張強さは表１に示すように１９ｋｇｆ／ｍ
ｍ２であった。[Comparative Example 2] When treated in the same manner as in Example 1 except that the proportion of particles with a particle size of 200 mesh or less was 92% by weight, the tensile strength of the sintered body was 19 kgf/m as shown in Table 1.
It was m2.
【００１７】[0017]
【比較例３】水アトマイズされたままの乾燥したＣｕ−
１０重量％Ｓｎ青銅粉の代わりに、水素還元減量が０．
１１重量％である水アトマイズして乾燥後、焼鈍処理さ
れた市販の水アトマイズＣｕ−１０重量％Ｓｎ青銅粉を
用いた以外は実施例１と同様に処理した場合の、焼結体
の引張強さは表１に示すように１８ｋｇｆ／ｍｍ２であ
った。[Comparative Example 3] Dry Cu- as water atomized
Instead of 10 wt% Sn bronze powder, hydrogen reduction loss is 0.
Tensile strength of the sintered body when treated in the same manner as in Example 1 except that commercially available water atomized Cu-10 wt% Sn bronze powder, which was atomized with 11 wt% water, dried, and then annealed, was used. As shown in Table 1, the strength was 18 kgf/mm2.
【００１８】[0018]
【比較例４】水アトマイズされたままの乾燥したＣｕ−
１０重量％Ｓｎ青銅粉の代わりに、市販の電解銅粉と３
３０メッシュ以下の粒度のアトマイズ錫粉とを混合した
Ｃｕ−１０重量％Ｓｎ混合粉を用いた以外は実施例１と
同様に処理した場合の、焼結体の引張強さは表１に示す
ように、１９ｋｇｆ／ｍｍ２であった。[Comparative Example 4] Dry Cu- as water atomized
Instead of 10% by weight Sn bronze powder, commercially available electrolytic copper powder and 3
Table 1 shows the tensile strength of the sintered body when treated in the same manner as in Example 1 except that Cu-10% by weight Sn mixed powder mixed with atomized tin powder with a particle size of 30 mesh or less was used. It was 19 kgf/mm2.
【００１９】[0019]
【比較例５】水アトマイズされたままの乾燥したＣｕ−
１０重量％Ｓｎ青銅粉の添加量を１．０重量％とし、焼
結温度を９００℃、１０００℃、１０５０℃及び１１３
０℃とした以外は実施例２と同様に処理した場合の、焼
結体の引張強さは表１に示すように１４〜２１ｋｇｆ／
ｍｍ２であった。[Comparative Example 5] Dried Cu- as water atomized
The amount of 10% by weight Sn bronze powder added was 1.0% by weight, and the sintering temperatures were 900°C, 1000°C, 1050°C, and 113°C.
When treated in the same manner as in Example 2 except that the temperature was 0°C, the tensile strength of the sintered body was 14 to 21 kgf/ as shown in Table 1.
It was mm2.
【００２０】[0020]
【比較例６】焼結温度を９００℃とした以外は実施例２
と同様に処理した場合の引張強さは表１に示すように１
６〜１９ｋｇｆ／ｍｍ２であった。[Comparative Example 6] Example 2 except that the sintering temperature was 900°C
The tensile strength when treated in the same manner as 1 is as shown in Table 1.
It was 6 to 19 kgf/mm2.
【００２１】[0021]
【表１】[Table 1]
Claims (1)
ッシュ以下の粒度の割合が９５重量％以上で水素還元減
量が０．１８重量％以上である水アトマイズされたまま
の乾燥青銅粉１．５〜５．０重量％と、黒鉛粉末１．０
重量％以下とを混合して成形した圧粉体を、非酸化雰囲
気中９５０〜１０５０℃で焼結することを特徴とする鉄
系焼結体の製造方法。Claim 1: Dry bronze powder that has been water atomized, which contains iron powder, 9 to 15% by weight of tin, the proportion of particles with a particle size of 200 mesh or less is 95% by weight or more, and the hydrogen reduction loss is 0.18% by weight or more. 1.5-5.0% by weight and graphite powder 1.0
1. A method for producing an iron-based sintered body, which comprises sintering a green compact formed by mixing and molding a powder of not more than 90% by weight at 950 to 1050°C in a non-oxidizing atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3162291A JPH04362152A (en) | 1991-06-07 | 1991-06-07 | Manufacture of ferrous sintered body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3162291A JPH04362152A (en) | 1991-06-07 | 1991-06-07 | Manufacture of ferrous sintered body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04362152A true JPH04362152A (en) | 1992-12-15 |
Family
ID=15751699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3162291A Pending JPH04362152A (en) | 1991-06-07 | 1991-06-07 | Manufacture of ferrous sintered body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04362152A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2026028533A1 (en) * | 2024-07-30 | 2026-02-05 | Ｊｆｅスチール株式会社 | Iron-based powder mixture for powder metallurgy and method for producing iron-based sintered body |
| WO2026028534A1 (en) * | 2024-07-30 | 2026-02-05 | Ｊｆｅスチール株式会社 | Iron-based powder mixture for powder metallurgy and method for producing iron-based sintered body |
-
1991
- 1991-06-07 JP JP3162291A patent/JPH04362152A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2026028533A1 (en) * | 2024-07-30 | 2026-02-05 | Ｊｆｅスチール株式会社 | Iron-based powder mixture for powder metallurgy and method for producing iron-based sintered body |
| WO2026028534A1 (en) * | 2024-07-30 | 2026-02-05 | Ｊｆｅスチール株式会社 | Iron-based powder mixture for powder metallurgy and method for producing iron-based sintered body |
| JPWO2026028534A1 (en) * | 2024-07-30 | 2026-02-05 | ||
| JPWO2026028533A1 (en) * | 2024-07-30 | 2026-02-05 |
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