Labarai - Gabatarwa ga Sarkar Ɗagawa ta Maki: G80, G100 da G120

Sarƙoƙi da majajjawa masu ɗagawamuhimman abubuwa ne a duk masana'antun gini, masana'antu, hakar ma'adinai, da kuma masana'antun ƙasashen waje. Ayyukansu sun dogara ne akan kimiyyar kayan aiki da injiniyan da aka tsara. Matsayin sarkar G80, G100, da G120 suna wakiltar nau'ikan ƙarfi mafi girma a hankali, wanda aka ayyana ta hanyar ƙaramin ƙarfinsu na tensile (a cikin MPa) wanda aka ninka da 10:

- G80: Mafi ƙarancin ƙarfin tensile 800 MPa

- G100: Mafi ƙarancin ƙarfin juriya na 1,000 MPa

- G120: Mafi ƙarancin ƙarfin juriya na 1,200 MPa

Waɗannan ma'aunan suna bin ƙa'idodin ƙasashen duniya (misali, ASME B30.9, ISO 1834, DIN EN818-2) kuma suna yin bincike da gwaji mai tsauri don tabbatar da aminci a ƙarƙashin nauyin da ke canzawa, yanayin zafi mai tsanani, da muhallin da ke lalata muhalli.

1. Kayan Aiki da Ƙarfe: Kimiyyar da ke Bayan Matsayin Sarƙoƙin Ɗagawa

Sifofin injinan waɗannan sarƙoƙin ɗagawa sun samo asali ne daga zaɓin ƙarfe daidai da kuma maganin zafi.

Matsayi	Kayan tushe	Maganin zafi	Mahimman Abubuwan Haɗawa	Siffofin Tsarin Gine-gine
G80	Karfe mai matsakaicin carbon	Kashewa da Ƙarfafawa	C (0.25-0.35%), Mn	Martensite mai zafi
G100	Karfe mai ƙarfi mai ƙarancin ƙarfe (HSLA)	Kashewa mai sarrafawa	Cr, Mo, V	Bainite/martensite mai laushi
G120	ƙarfe na HSLA mai ƙarfi	Daidaito na daidaita zafin jiki	Cr, Ni, Mo, Nb/V mai ƙananan ƙarfe	Watsawar carbide mai tsanani

Me yasa kuma yadda waɗannan kayan suke da mahimmanci:

- Inganta Ƙarfi: Abubuwan da ke haɗa sinadarai (Cr, Mo, V) suna samar da carbide waɗanda ke hana motsi na katsewa, suna ƙara ƙarfin yawan amfanin ƙasa ba tare da lallashin jurewa ba.

-Juriyar Gajiya: Tsarin ƙananan ƙwayoyin halitta masu kyau a cikin G100/G120 suna hana fara fashewa. Martensite mai zafi na G120 yana ba da mafi kyawun lokacin gajiya (> zagaye 100,000 a 30% WLL).

- Juriyar Sakawa: Taurare saman (misali, taurarewar induction) a cikin G120 yana rage gogewa a cikin aikace-aikacen da ke da ƙarfi kamar ma'adinan draglines.

Yarjejeniyar Walda don Ingancin Sarka

•Shiri Kafin Walda:

o Tsaftace saman haɗin gwiwa don cire iskar oxygen/gurɓatawa.

o A kunna wuta zuwa 200°C (G100/G120) domin hana tsagewar hydrogen.

•Hanyoyin Walda:

Walda ta Laser: Ga sarƙoƙin G120 (misali, ƙarfen Al-Mg-Si), walda mai gefe biyu yana ƙirƙirar yankunan haɗuwa tare da HAZ mai siffar H don rarraba damuwa iri ɗaya.

o Wayar Zafi TIG: Ga sarƙoƙin ƙarfe na tukunyar jirgi (misali, 10Cr9Mo1VNb), walda mai wucewa da yawa yana rage karkacewa.

•Shawara Mai Muhimmanci:A guji lahani na geometric a cikin HAZ - manyan wuraren da ke fara fashewa a ƙasa da 150°C.

Sigogi na Maganin Zafi Bayan Walƙiya (PWHT)

Matsayi	Zafin PWHT	Lokacin Riƙewa	Canjin Tsarin Gine-gine	Inganta Kadara
G80	550-600°C	Awa 2-3	Martensite mai zafi	Rage damuwa, +10% taurin tasiri
G100	740-760°C	Awa 2-4	Yaɗuwar carbide mai kyau	15%↑ Ƙarfin gajiya, HAZ iri ɗaya
G120	760-780°C	Awa 1-2	Yana hana ƙaiƙayi na M₂₃C₆	Yana hana asarar ƙarfi a yanayin zafi mai yawa

Gargaɗi:Wuce digiri 790 na Celsius yana haifar da raguwar ƙarfin carbide → asarar ƙarfi/ƙarfi.

2. Aikin Ɗaga Sarkoki a Cikin Matsanancin Yanayi

Muhalli daban-daban suna buƙatar mafita na kayan da aka keɓance.

Juriyar Zafin Jiki:

- G80:Aiki mai dorewa har zuwa 200°C; tare da asarar ƙarfi mai sauri sama da 400°C saboda juyawar zafin jiki.

- G100/G120:Sarkoki Suna riƙe da ƙarfi kashi 80% a zafin jiki na 300°C; maki na musamman (misali, tare da ƙarin Si/Mo) suna jure wa raguwar raguwa zuwa -40°C don amfani da arctic.

Juriyar Tsatsa:

- G80:Yana da saurin tsatsa; yana buƙatar shafa mai akai-akai a wurare masu danshi.

- G100/G120:Zaɓuɓɓukan sun haɗa da galvanization (wanda aka yi da zinc) ko nau'ikan ƙarfe marasa ƙarfe (misali, 316L ga masana'antun ruwa/sunadarai). G100 mai galvanized yana jure wa gwaje-gwajen feshi na gishiri sama da sa'o'i 500.

Gajiya da Taurin Tasiri:

- G80:Ya isa ga nauyin da ba ya tsayawa; taurin tasirin ≈25 J a -20°C.

- G120:Tauri na musamman (>40 J) saboda ƙarin Ni/Cr; ya dace da ɗagawa mai ƙarfi (misali, cranes na wurin jiragen ruwa).

3. Jagorar Zaɓin Takamaiman Aikace-aikace

Zaɓar maki mai kyau yana inganta aminci da inganci wajen amfani da shi.

Aikace-aikace	Daraja da aka ba da shawarar	Dalili
Gine-gine na Gabaɗaya	G80	Yana da sauƙin amfani ga matsakaicin kaya/wuraren busasshiyar hanya; misali, shimfidar wuri.
Ɗaga Ruwa a Teku/Ruwa	G100 (Galvanized)	Yana da ƙarfi sosai + juriya ga tsatsa; yana tsayayya da rijiyoyin ruwa na teku.
Haƙar ma'adinai/haƙar ma'adinai	G120	Yana ƙara juriya ga lalacewa wajen sarrafa duwatsu masu abrasive; yana tsira daga nauyin buguwa.
Zafin Jiki Mai Tsayi (misali, Masana'antar Karfe)	G100 (Nau'in da aka yi wa zafi magani)	Yana riƙe ƙarfi kusa da tanderu (har zuwa 300°C).
Masu Ɗagawa Masu Muhimmanci	G120	Mai jure gajiya don ɗagawa daga helikwafta ko shigar da kayan aiki masu juyawa.

4. Fahimtar Rigakafin Kasawa da Kulawa

- Rashin Gajiya:Mafi yawan amfani da shi a cikin lodawa mai zagaye. Mafi kyawun juriyar yaduwar fasa na G120 yana rage wannan haɗarin.

- Tsaftace Tsatsa:Ƙarfin sassauci; majajjawan G100 masu galvanized suna dawwama na tsawon lokaci 3× a wuraren bakin teku idan aka kwatanta da G80 da ba a rufe shi ba.

- Dubawa:ASME tana buƙatar duba duk wata don ganin tsagewa, lalacewa, ko tsayin daka fiye da kashi 10%, ko kuma tsawon lokaci. Yi amfani da gwajin ƙwayoyin maganadisu don hanyoyin haɗin G100/G120.

5. Ƙarfafa Sabbin Abubuwa da Abubuwan da Za Su Faru Nan Gaba

- Sarkoki Masu Wayo:Sarƙoƙi na G120 tare da na'urori masu auna matsin lamba da aka haɗa don sa ido kan kaya a ainihin lokaci.

- Rufi:Rufin Nano-ceramic akan G120 don tsawaita rayuwar sabis a cikin yanayin acidic.

- Kimiyyar Kayan Aiki:Bincike kan nau'ikan ƙarfe masu ƙarfi na Austenitic don ɗagawa mai ƙarfi (-196°C LNG aikace-aikace).

Kammalawa: Daidaita Matsayin Sarka da Bukatunku

- Zaɓi G80don lif ɗin da ba sa lalatawa, masu sauƙin amfani da farashi.

- Kayyade G100don yanayin lalata/mai ƙarfi wanda ke buƙatar daidaiton ƙarfi da karko.

- Zaɓi G120a cikin mawuyacin yanayi: gajiya mai yawa, gogewa, ko madaidaicin ɗagawa mai mahimmanci.

Bayani na Ƙarshe: Koyaushe fifita sarƙoƙi masu takardar shaida tare da maganin zafi da za a iya gano su. Zaɓi mai kyau yana hana mummunan lalacewa - kimiyyar kayan aiki ita ce ginshiƙin kare lafiyar ɗagawa.

Lokacin Saƙo: Yuni-17-2025