Lokacin da tsarin na'ura mai aiki da karfin ruwa ya gaza a cikin rijiyoyin mai na teku - ko kuma lokacin da tarukan famfo suka kama a cikin tsire-tsire masu yawan gishiri - tushen tushen ba shi da wuyar ƙira. Yana da lalata. Ba tsatsa ba. Ba kwalliyar kwalliya ba. Mun ga gidajen bawul suna fashe bayan watanni 18 a cikin mahalli masu wadatar chloride, har ma da ƙayyadaddun ƙayyadaddun ƙarfe da aka buga akan zane. Shi ya sa injiniyoyi a Arewacin Amurka da Turai yanzu suka fara yi tambaya ɗaya: Ina masana'antar sassa masu jure lalata ke zaune a sarkar samar da ku?
Juriya na lalata ba shafi ba ne - an gina shi a cikin gami, tsari, da lissafi
Juriya na gaskiya yana farawa kafin fara injina. Yana rayuwa cikin daidaiton ƙarfe na AMS 5387 cobalt alloy-inda batch-to-batch carbon bambance-bambancen a ƙarƙashin 0.02% ya bambanta tsakanin shekaru 5 na sabis da microcracking wanda bai kai ba. Yana zaune a cikin nozzles na tushen T800 waɗanda ke riƙe da kwanciyar hankali a 650 ° C yayin da yake tsayayya da sulfidation a cikin layukan gas mai tsami. Kuma yana rayuwa a cikin horo don ƙin yin simintin gyaran zafi idan gwajin ultrasonic ya nuna haɗin ƙasa guda ɗaya sama da 0.3 mm.
Mun inganta wannan a duk faɗin ayyukan samarwa na 47 don injin famfo na Jamusanci OEM: sassan da aka ƙera daga yashi-simintin ASTM A487 Grade CA6NM sun nuna tsawon rayuwar sabis na 3.2 × fiye da geometries iri ɗaya daga mai siyarwa ta amfani da remelt ɗin da ba a tantance ba. Me yasa? Abun iya ganowa. Kowane narkakken ƙuri'a yana ɗaukar cikakkun rahotannin PMI, masu lanƙwasa, da bayanan gwajin lalata-ba wai kawai takardar shedar niƙa ba.
Wannan matakin sarrafawa yana buƙatar haɗin kai tsaye. Ba za ku iya fitar da simintin gyare-gyare ba, sannan ku yi tsammanin shagunan CNC za su rama abin da ya haifar da karkatar da kayan aiki. Ba za ku iya dogaro da masu kula da zafi na ɓangare na uku ba lokacin da gidan famfo famfo na piston ɗin ku yana buƙatar tsufa-mataki-biyu a 925°C + 725°C tare da ±3°C haƙuri. Wannan shine dalilin da ya sa masana'antar sassa masu juriya dole ne su mallaki cikakkiyar madauki: karɓar kayan aiki → simintin → damuwa damuwa → daidaitaccen machining → wucewa na ƙarshe ko murfin HVOF.
Rukunin samfura guda huɗu-da dalilin da yasa suke raba yanayin gazawa ɗaya
Mafi yawan ma'anar gazawa a tsakanin bawuloli na matsa lamba, winch center shaft rollers, da cobalt gami matosai ba lissafi ba ne. Rashin daidaituwar mu'amala ne. Musamman:
- CNC inji sassa tare da m GD & T callouts (± 0.01 mm matsayi tolerances) amma jefa substrates tare da saura danniya> 120 MPa;
- Abubuwan da aka gyara na Cobalt-nickel inda bambance-bambancen fadada thermal tsakanin AMS 5387 jiki da Inconel 718 abubuwan da aka saka suna haifar da microgaps yayin hawan hawan zafi;
- Simintin ƙarfe tare da rarraba nodule na graphite mara daidaituwa-wanda ke kaiwa ga ƙwayoyin galvanic da ke cikin gida a cikin yanayin yanayin sulfide mai rigar;
- Bakin karfe simintin gyaran kafa Inda hazo lokaci na sigma ke faruwa saboda rashin kula da yanayin sanyaya bayan walda, ba ƙarancin sinadarai ba.
Mun kama duka huɗun a cikin binciken kwanan nan na masu samar da kayayyaki 12 suna yin tayin kan tsarin ci gaban abin hawa. Kayan aiki guda ɗaya kawai - wanda aka sanye shi da dakunan gwaje-gwajen ƙarfe na cikin gida, taswirar yanayin zafi mai alaƙa da CMM, da kuma tabbatar da ƙarfin ƙarfi na ISO 17025 - sun haɗu da madaidaicin lalatawar aiki: yoyowar sifili bayan zagayowar 2,000 a mashaya 350 a cikin ruwan tekun roba.
Me yasa "lalata mai jurewa" yana nufin komai ba tare da horon tsari ba
Wasu dillalai suna faɗin iyawar "masana'antar sassa masu jurewa" - amma isar da daidaitattun ayyukan CNC. Hakan ya gaza saboda:
Na farko, cobalt gami kamar T800 suna buƙatar kayan aikin carbide tare da kusurwar rake mara kyau na 8 ° da ruwan sanyi a matsi na mashaya 65 - ba saitunan tsoho na kanti ba. Na biyu, simintin saka hannun jari yana buƙatar HIP (matsawar isostatic mai zafi) a 1150°C/150 MPa don rufe microporosity wanda ya zama hanyoyin electrolyte. Na uku, abubuwan gamawa saman: Ra 0.4 μm akan wurin zama na bawul yana rage ƙaddamarwar lalata ta hanyar 70% da Ra 1.6 μm, kowane ingantaccen NACE MR0175/ISO 15156.
Muna gudanar da kowane ɓangaren cobalt ta hanyar gwaje-gwaje masu zaman kansu guda uku: pre-machining (PMI + girman hatsi), bayan-machining (CMM + fenti penetrant), da ƙarshe (fasa gishiri ta ASTM B117 + electrochemical impedance spectroscopy). Idan EIS ya nuna juriya na canja wurin caji ƙasa da 12 kΩ·cm², ɓangaren jigilar kaya-ba azaman “mai jure lalata ba,” amma azaman “sake yin aikin da ake buƙata.” Babu ware.
Dubi bayan ƙayyadaddun ƙayyadaddun bayanai-duba abin da ya tsira daga aika aika ta duniya
Masana'antar sassa masu juriya da lalata suna samun taken ta a fagen, ba dakin gwaje-gwaje ba. Muna bin diddigin dawowar filin: 92% na sassan famfo na AMS 5387 da aka girka a cikin tsire-tsire na tsiro na kudu maso gabashin Asiya sun kai shekaru 4+ ba tare da kulawa ba. Rashin gazawar sifili ya faru a cikin raka'a 1,842 da aka tura a cikin matsugunan ruwan tekun Arewa - duk da fallasa zuwa 3.5% NaCl, 12 ppm H₂, da lodin keken keke har zuwa mashaya 700.
Wannan amincin ya samo asali ne daga yanke shawara da aka yanke kafin guntu na farko ya tashi: samo cobalt daga matatun da aka tabbatar a Finland - ba haɗe-haɗe ba; tabbatar da simintin simintin gyare-gyare a kan ainihin taswirorin ƙananan tsarin; da kuma sanya wuraren bincike inda a zahiri ke tasowa - ba kawai a ƙofofin ba. Lokacin da kuke buƙatar sassan da ba kawai sun haɗu da ASTM G48 ko ISO 9223 Class C5 ba-I, kuna buƙatar abokin tarayya wanda ke ɗaukar juriyar lalata azaman kimiyyar lissafi, ba talla ba.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. yana aiki azaman masana'anta mai jure lalata da aka kafa a cikin sakamako masu iya aunawa-ba alƙawura ba. Wurin da ya dace da ISO a cikin Qingdao yana ba da daidaiton ƙima, amincin ƙarfe, da bayanan gano abubuwan abubuwan da ke aiki inda gazawa ba zaɓi bane. Don ƙwararrun hanyoyin masana'antu masu mahimmancin manufa, ɗorewa yana farawa da yadda zurfin juriya na lalata -ba ƙayyadadden ƙayyadaddun bayanai ba.
