JP2016191145A - 焼結ばめを用いた黄銅又は青銅を有する複合材部品の製造方法 - Google Patents
焼結ばめを用いた黄銅又は青銅を有する複合材部品の製造方法 Download PDFInfo
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- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 title claims abstract description 40
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- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 239000011701 zinc Substances 0.000 claims description 6
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
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- 239000010703 silicon Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
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- 238000005266 casting Methods 0.000 claims description 4
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- 238000009740 moulding (composite fabrication) Methods 0.000 claims 1
- 230000004044 response Effects 0.000 abstract description 6
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 3
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- 239000007769 metal material Substances 0.000 abstract description 2
- 230000002093 peripheral effect Effects 0.000 description 10
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- 241000784732 Lycaena phlaeas Species 0.000 description 1
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- 238000009826 distribution Methods 0.000 description 1
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
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- B22F7/04—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal
- B22F2007/042—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal characterised by the layer forming method
- B22F2007/045—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal characterised by the layer forming method accompanied by fusion or impregnation
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Abstract
【解決手段】黄銅や青銅が焼結中に寸法収縮又は寸法拡張を示すというユニークな焼結応答をし、対照的に、他の粉末金属材料の大部分は、有効な焼結後に寸法収縮のみを示す。この寸法変化のフレキシビリティを利用して、従来見られなかった構造的配置と寸法変化による機械的接合による複合材部品を製造する方法。黄銅及び青銅からなる粉末金属を圧縮し成形し、前記未焼結粉末金属成形体を、鉄を含む部分に隣接して位置付け、前記未焼結銅含有粉末成形体を焼結し、焼結銅金金粉末金属を形成し、鉄との複合部材を形成する方法。
【選択図】図1
Description
本出願は、2015年3月6日に出願された米国暫定特許出願第62/129,144号の出願日の利益を主張し、内容全体を参照することにより本明細書に組み込む。
適用しない。
Claims (27)
- 焼結銅合金粉末金属部分と鉄を含む部分を有する複合材部品の形成方法であって、
銅と少なくとも1つの合金化元素を含む前記銅含有粉末金属を圧縮して、未焼結銅含有粉末金属成形体を形成するステップと、
前記鉄を含む部分に隣接して前記未焼結銅含有粉末金属成形体を位置付けるステップと、
前記未焼結銅含有粉末金属成形体を焼結して、焼結銅合金粉末金属部分を形成するステップと、を備え、
前記銅含有粉末金属の前記少なくとも1つの合金化元素が、黄銅及び青銅からなるグループから選択された材料組成を備えた前記焼結銅含有粉末金属部分を提供し、
それによって、前記焼結銅合金粉末金属部分を形成するための前記未焼結銅合金粉末金属成形体の焼結中に、前記未焼結銅合金粉末金属成形体の寸法変化が、前記焼結銅合金粉末金属部分と前記鉄を含む部分との締まりばめ(interference fit)をもたらし、前記焼結銅合金粉末金属部分と前記鉄を含む部分とを一体に接合して、前記複合材部品を形成することを特徴とする方法。 - 前記焼結銅合金粉末金属部分の材料組成によって、前記未焼結銅合金粉末金属成形体の前記焼結銅合金粉末金属部分への焼結中の寸法変化が、寸法の増加を伴って、締まりばめを生じさせることを特徴とする請求項1に記載の方法。
- 前記鉄を含む部分に隣接して前記未焼結銅含有粉末金属成形体を位置付けるステップが、前記鉄を含む部分の開口の内側に前記未焼結銅含有粉末金属成形体を位置付けるステップを含むことを特徴とする請求項1に記載の方法。
- 焼結に際し、前記未焼結銅含有粉末金属成形体が焼結されて前記焼結銅合金粉末金属部分を形成するにつれて前記未焼結膨張銅含有粉末金属成形体が膨張して、前記焼結銅合金粉末金属部分の外周と前記鉄を含む部分の内周の間で締まりばめが形成されることを特徴とする請求項3に記載の方法。
- 焼結中に、前記未焼結銅含有粉末金属成形体の周囲長が増加して、前記焼結銅合金金属部分を形成することを特徴とする請求項4に記載の方法。
- 前記鉄を含む部分に隣接して前記未焼結銅含有粉末金属成形体を位置付けるステップが、前記未焼結銅含有粉末金属成形体の開口の内側に前記鉄を含む部分を位置付けるステップを含むことを特徴とする請求項1に記載の方法。
- 焼結に際し、前記未焼結銅含有粉末金属成形体が焼結されて前記焼結銅合金粉末金属部分を形成するにつれて前記未焼結膨張銅含有粉末金属成形体が収縮して、前記焼結銅合金粉末金属部分の内周と前記鉄を含む部分の外周の間で締まりばめが形成されることを特徴とする請求項6に記載の方法。
- 焼結中に、前記未焼結銅含有粉末金属成形体の周囲長が減少して、前記焼結銅合金金属部分を形成することを特徴とする請求項7に記載の方法。
- 前記少なくとも1つの合金化元素が亜鉛を含み、前記焼結銅合金粉末金属部分の材料組成が黄銅であることを特徴とする請求項1に記載の方法。
- 前記少なくとも1つの合金化元素が、スズ、アルミニウム、シリコン、及びニッケルからなるグループから選択され、前記焼結銅合金粉末金属部分の材料組成が青銅であることを特徴とする請求項1に記載の方法。
- 前記焼結銅合金粉末金属部分が環状で、前記鉄を含む部分が環状であることを特徴とする請求項1に記載の方法。
- 前記鉄を含む部分が、鉄、鉄合金、鉄鋼、及び鉄鋼合金の少なくとも1つであることを特徴とする請求項1に記載の方法。
- 鍛造(wrought forming)、鋳造(casting)、又は粉末冶金を用いて前記鉄を含む部分を形成するステップをさらに備えたことを特徴とする請求項1に記載の方法。
- 前記複合材部品がベアリングであって、前記焼結銅合金粉末金属部分がベアリング面を備えていることを特徴とする請求項1に記載の方法。
- 前記焼結ステップの間、前記複合材部品の前記鉄を含む部分をオーステナイト化する温度で前記未焼結銅含有粉末金属成形体の焼結が行われ、
前記方法が、焼結後、前記複合材部品を冷却するステップをさらに備え、
少なくとも前記オーステナイトの幾つかをマルテンサイトに転移させるのに十分なほど迅速に前記冷却が行われることを特徴とする請求項1に記載の方法。 - 前記複合材部品の前記鉄を含む部分において前記マルテンサイトを焼き戻しする(tempering)ステップをさらに備えたことを特徴とする請求項15に記載の方法。
- 前記焼結銅合金粉末金属部分をサイジング(sizing)するステップと、前記焼結銅合金粉末金属部分に油を含浸するステップと、をさらに備えたことを特徴とする請求項1に記載の方法。
- 青銅と黄銅からなるグループから選択された材料組成を備えた焼結銅合金粉末金属部分と、
鉄を含む部分と、を備えた複合材部品であって、
前記焼結銅合金粉末金属部分を形成するための未焼結銅含有粉末金属成形体の焼結中の前記未焼結銅含有粉末金属成形体の寸法変化の結果として、前記焼結銅合金粉末金属部分に隣接した前記鉄を含む部分が前記焼結銅合金粉末金属部分と締まりばめを形成することを特徴とする複合材部品。 - 前記鉄を含む部分が前記焼結銅合金粉末金属部分の開口に設けられ、前記焼結銅合金粉末金属部分の内周と前記鉄を含む部分の外周が締まりばめを形成することを特徴とする請求項18に記載の複合材部品。
- 前記焼結銅合金粉末金属部分が前記鉄を含む部分の開口に設けられ、前記鉄を含む部分の内周と前記焼結銅合金粉末金属部分の外周が締まりばめを形成することを特徴とする請求項18に記載の複合材部品。
- 前記焼結銅合金粉末金属部分が黄銅で、合金化元素として亜鉛を含んでいることを特徴とする請求項18に記載の複合材部品。
- 前記焼結銅合金粉末金属部分が青銅で、合金化元素としてスズ、アルミニウム、シリコン、及びニッケルのうちの1つ以上を含んでいることを特徴とする請求項18に記載の複合材部品。
- 前記鉄を含む部分が、鉄、鉄合金、鉄鋼、及び鉄鋼合金の少なくとも1つであることを特徴とする請求項18に記載の複合材部品。
- 前記鉄を含む部分が、鍛造、鋳造、又は粉末冶金を用いて形成されていることを特徴とする請求項18に記載の複合材部品。
- 前記焼結銅合金粉末金属部分が環状で、前記鉄を含む部分が環状であることを特徴とする請求項18に記載の複合材部品。
- 前記複合材部品がベアリングであって、前記焼結銅合金粉末金属部分がベアリング面を備えていることを特徴とする請求項18に記載の複合材部品。
- 前記焼結銅合金粉末金属部分が油で含浸されていることを特徴とする請求項18に記載の複合材部品。
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