TWI780351B - 獲得具有減少的鉛含量的黃銅胚之方法 - Google Patents
獲得具有減少的鉛含量的黃銅胚之方法 Download PDFInfo
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- 229910001369 Brass Inorganic materials 0.000 title claims abstract description 88
- 239000010951 brass Substances 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000012634 fragment Substances 0.000 claims abstract description 16
- 238000013467 fragmentation Methods 0.000 claims abstract description 9
- 238000006062 fragmentation reaction Methods 0.000 claims abstract description 9
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- 238000002844 melting Methods 0.000 claims abstract description 3
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- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 8
- 150000007524 organic acids Chemical class 0.000 claims description 8
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 235000005985 organic acids Nutrition 0.000 claims description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 235000019260 propionic acid Nutrition 0.000 claims description 4
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 claims description 4
- 210000002257 embryonic structure Anatomy 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 238000011282 treatment Methods 0.000 abstract description 5
- 238000001125 extrusion Methods 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 3
- -1 2-acrylic acid Chemical compound 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
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- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 235000012206 bottled water Nutrition 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
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- 238000007906 compression Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 210000001161 mammalian embryo Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 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
- 238000011160 research Methods 0.000 description 1
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- 239000004576 sand Substances 0.000 description 1
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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
- B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
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- B22F9/00—Making metallic powder or suspensions thereof
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Abstract
一種獲得具有減少的鉛含量的黃銅胚之方法,提供以切削由傳統的黃銅製成的完成或半完成品,藉由取出切片而獲得數個傳統的黃銅切片,且在上述傳統的黃銅切片上執行碎裂處理以獲得數個傳統的黃銅碎片;在上述傳統的黃銅碎片上執行鉛去除處理以獲得具有減少的鉛含量的黃銅碎片;在爐中熔化包括上述具有減少的鉛含量的黃銅碎片;藉由直接或反向擠製熔化的產物,而獲得黃銅胚。
Description
本發明係有關於一種獲得黃銅胚之方法以及因此獲得的黃銅胚;本發明係特別有關於一種具有減少的鉛含量的黃銅胚。
習知若鉛含量(content)少於重量的百分之0.1,黃銅(brass)被定義為「無鉛的」;若鉛含量介於重量的百分之0.1及百分之0.2之間,黃銅被定義為「低鉛含量的」。另一方面,傳統的黃銅一般具有在百分之1.5及百分之3.5之間變化的鉛含量。
眾所皆知地,黃銅(銅(Cu)及鋅(Zn)之合金)係在製造產業中被廣泛使用的材料。首先是因為黃銅極佳的可鑄性,使得可藉由熔化製程以獲得半完成的鑄件;因為黃銅極佳的刀具可切削性(tool machinability),使得可藉由適當手法的切削方式藉由取出切片以完成上述半完成品。
黃銅的可切削性與其中鉛(Pb)的數量(amount)係高度相關。
然而,近年來,存在以無鉛的合金或具有非常低鉛
含量的合金製造特定產品的需求,例如水龍頭(taps)或其他接觸水的構件,尤其若為可飲用的水。此主要原因係需要預防鉛被溶解到水中,導致被認為對健康有害的後果。
因此許多公司的研究及開發工作皆以具有符合類似於傳統黃銅的機械特性及可加工性之定義的無鉛黃銅為目的。
在此方向上,最有希望的方法之一為用石墨粉取代鉛。在此方面,申請人為義大利發明專利No.10 2013 9021 8136 5的擁有人。
更進一步的研究工作聚焦於如何獲得混合有石墨粉的無鉛黃銅碎片。在此情況中,申請人為國際專利號WO-A1-2017/199147的擁有人,此專利係關於無鉛黃銅產物,闡明從無鉛的黃銅切片獲得無鉛的黃銅碎片,上述無鉛的黃銅切片係藉由從機械切削取出切片獲得。
另一方面,本發明關於一種用以獲得相較於以往具有減少的鉛含量的黃銅胚之創新方法以及此黃銅胚。根據本發明,傳統的(亦即具有一般鉛含量的)黃銅切片係被化學及機械處理以降低它們的鉛含量。
一種獲得具有減少的鉛含量的黃銅胚之方法,包括以下步驟:在傳統的黃銅組成的完成品或半完成品上執行機械切削,藉由取出切片,獲得複數個傳統的黃銅切片;在傳統的黃銅切
片上執行碎裂處理以獲得複數個傳統的黃銅碎片;在傳統的黃銅碎片上執行鉛去除處理,以獲得具有減少的鉛含量的複數個黃銅碎片,其中鉛去除處理包括鉛去除浴,例如在水與一或多種有機酸的溶液中,由包括丁酸、丙酸、2-丙烯酸、丙烯酸的酸基中選擇的一種有機酸較佳;在爐中,熔化包括具有減少的鉛含量的黃銅碎片之熔料;藉由直接或反向的方式擠製熔化的產物,獲得黃銅胚;其中如果具有減少的鉛含量的黃銅碎片之鉛含量不夠低,進一步的碎裂處理及進一步的鉛去除處理將被執行,且在進一步的碎裂處理之前,擠壓經過碎裂處理之黃銅碎片。
一種獲得具有減少的鉛含量的黃銅胚之方法,包括以下步驟:在傳統的黃銅組成的完成品或半完成品上執行機械切削,以取出切片,獲得複數個傳統的黃銅切片;在傳統的黃銅切片上執行鉛去除處理,以獲得具有較低鉛含量的複數個黃銅切片,其中鉛去除處理包括鉛去除浴,例如在水與一或多種有機酸的溶液中,由包括丁酸、丙酸、2-丙烯酸、丙烯酸的酸基中選擇的一種有機酸較佳;在具有較低鉛含量的黃銅切片上執行碎裂處理,以獲得具有較低鉛含量的複數個黃銅碎片;在具有較低鉛含量的黃銅碎片上執行進一步的鉛去除處理,以獲得具有減少的鉛含量的複數個黃銅碎片;在爐中,熔化包括具有減少的鉛含量的黃銅碎片之熔料;藉由直接或反向的方式擠製熔化的產物,獲得黃銅胚;其中如果具有減少的鉛含量的黃銅碎片之鉛含量不夠低,進一步的碎裂處理及進一步的鉛去除處理將被執行,且在進一步的碎裂處理之前,擠壓
經過碎裂處理之黃銅碎片。
一種具有減少的鉛含量的黃銅胚,根據前述方法而獲得。
根據本發明的方法之特性及優點將從以下提供的說明書變得顯而易見。
根據本發明,一種獲得具有減少的鉛含量的黃銅胚之方法提供給獲得傳統的黃銅切片的一個步驟。
前述傳統的黃銅切片係藉由在由傳統的黃銅製成的半完成或完成品上執行機械切削而取出切片的成果。
根據構成完成或半完成品的傳統黃銅種類,以及根據取得完成或半完成品的機械製程種類,切片呈現特有的捲曲形狀或更為破碎的外觀。
上述方法更提供傳統的黃銅切片,以在若有必要時洗除塵沙及汙染物(例如冷卻液及/或潤滑劑)之後,經過機械碎裂處理,目的為增加切片的總表面積及佔據的總體積之比例。傳統的黃銅碎片從上述碎裂處理被獲得。
更好的是,前述機械碎裂處理包含傳統的切片之研磨。
隨後,傳統的切片碎片經過化學處理以減少鉛含量。
前述化學處理包含鉛去除,鉛去除藉由將傳統的黃
銅碎片浸入具有水與一或多種有機酸的溶液之池中而執行。
舉例來說,前述有機酸由包括丁酸、丙酸、2-丙烯酸、丙烯酸的酸基中選擇。
更好的是,上述鉛去除浴被攪拌(agitated),例如藉由超音波或機械。
上述鉛去除處理產生具有減少的鉛含量的黃銅碎片。
根據此方法的較佳實施例,若經過鉛去除浴的黃銅碎片不具有足夠低的鉛含量,碎裂處理及鉛去除處理將再反覆地執行。
根據此方法的其中一種不同的實行,在傳統的、未碎裂的黃銅切片上執行鉛去除處理,且若經過上述鉛去除的切片之鉛含量不夠低,執行後續的碎裂處理(及進一步的鉛去除)。
更好的是,在進一步的碎片處理進行之前,碎片承受擠壓。有利地,這允許鉛去除處理主要作用的碎片之外部表面增加。
根據此方法的另一種不同的實行,在進行鉛去除處理之前,多個碎裂處理及隨後的擠壓反覆地進行。
最終獲得的具有減少的鉛含量的黃銅碎片被使用作為熔爐的熔料,與實質上純的銅及鋅(例如,銅箔及鋅塊)及/或甚至是黃銅碎屑一起較佳,以獲得具有期望的冶金組成的熔化池。
熔化的金屬藉由直接或反向的方式擠製,被用以獲
得胚(billet)。
根據以上描述的方法,獲得的胚接著被用以獲得具有期望的直徑及長度的條材(bar)。
接著藉由使用者使條材經過機械切削以取出切片,且因此獲得的黃銅切片接著再次經過根據本發明的方法。如此一來,藉由反覆地加工,可認為黃銅將逐步地具有越來越低的鉛含量。
創新地,從工業的角度來看,根據本發明的方法係非常有利的,因其允許傳統的(亦即具有一般鉛含量的)黃銅切片被使用以獲得具有減少的鉛含量的黃銅胚。
此外,有利地,藉由條材的使用者,切片之使用允許通常在遠端廠中切削以取出切片,以在主要廠中產生半完成或完成品、切片之碎裂及鉛去除浴。切片從遠端廠被運輸至主要廠。
除此之外,有利地,藉由條材的使用者,取出切片之切削步驟通常在第一遠端廠中執行,以產生半完成或完成品,傳統的黃銅切片被運輸至第二遠端廠,碎裂及鉛去除處理在前述第二遠端廠中執行。最後地,具有減少的鉛含量的黃銅碎片被運輸至主要廠而被熔化,且製造出新的胚。
Claims (5)
- 一種獲得具有減少至小於重量百分比1.5的鉛含量的黃銅胚之方法,包括以下步驟:在傳統的黃銅組成的一完成品或半完成品上執行機械切削,藉由取出切片,獲得複數個傳統的黃銅切片;在該等傳統的黃銅切片上執行一碎裂處理以獲得複數個傳統的黃銅碎片;在該等傳統的黃銅碎片上執行一鉛去除處理,以獲得具有減少的鉛含量的複數個黃銅碎片,其中該鉛去除處理包括一鉛去除浴,在水與一或多種有機酸的一溶液中;在一爐中,熔化包括具有減少的鉛含量的該等黃銅碎片之一熔料;藉由直接或反向的方式擠製該熔化的產物,獲得一黃銅胚;其中如果具有減少的鉛含量的該等黃銅碎片之鉛含量不夠低,一進一步的碎裂處理及一進一步的鉛去除處理將被執行,且在該進一步的碎裂處理之前,擠壓經過該碎裂處理之該等黃銅碎片。
- 如申請專利範圍第1項所述之獲得具有減少的鉛含量的黃銅胚之方法,其中該鉛去除浴被攪拌。
- 如申請專利範圍第2項所述之獲得具有減少的鉛含量的黃銅胚之方法,其中該鉛去除浴藉由超音波攪拌。
- 如申請專利範圍第1項所述之獲得具有減少的鉛含量的黃銅胚之方法,其中該碎裂處理由研磨組成。
- 如申請專利範圍第1項至第4項中任一項所述之獲得具有減少的鉛含量的黃銅胚之方法,其中該有機酸由包括丁酸、丙酸、丙烯酸的酸基中選擇。
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IT102018000008041A IT201800008041A1 (it) | 2018-08-10 | 2018-08-10 | Processo per l’ottenimento di una billetta di ottone a ridotto tenore di piombo e billetta così ottenuta |
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TW528812B (en) * | 1995-08-03 | 2003-04-21 | Europa Mea Lli S P A | Method for obtaining low lead release components made of copper based alloys containing lead and treating aqueous solutions used in the method |
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JP2022502563A (ja) | 2022-01-11 |
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SI3833792T1 (sl) | 2023-01-31 |
IL280783B1 (en) | 2024-03-01 |
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