The back up roll is a roll inotsigira basarolluye ndiro guru uye rinorema kupfuura mamwe ose rinoshandiswa muzvigayo. Therollinogona kutsigira yepakatirollnechinangwa chekudzivisa kutsauka kwebhuku rekushanda uye kukanganisa pane goho uye kunaka kweplate uye strip rolling mill. Hunhu hwemhando yebackup roll kuoma kwepamusoro, kuomarara kwakanaka uye yakadzika yakaomeswa layer ye roll body, kusimba kwakanaka uye kusimba kwe roll mutsipa uye roll body. iyo backup roll ine yakakwirira kupfeka kuramba uye peeling kuramba, yakasimba anti-tsaona. Masimbi akaumbwa e1000mm kana pasi anogadzirwa ne86CrMoV7 uye 9Cr2Mo. Kabhoni yayo inosvika 0.80% kusvika 0.95% uye Cr yemukati i2%.Inogona kushandiswa kune mamwe magiyo madiki. Cr4 neCr5 back up rolls ine kabhoni yemukati ye 0.4% kusvika 0.6% uye Cr yemukati ye4% kusvika 5%, yakakodzera kune yakakwirira-kumhanya simbi uye semi-yakakwira-kumhanya simbi yekushanda.

Kune mamwe zvigayo zvidiki, mabhegi esimbi ekuchengetedza e1000mm kana mashoma anogadzirwa ne86CrMoV7 uye 9Cr2Mo, kabhoni yemukati i0.80% kusvika 0.95% uye Cr yemukati i2%.
Simbi yeCr4 uye Cr5 backup rolls ine kabhoni yemukati ye0.4% kusvika 0.6% uye Cr yemukati ye4% kusvika 5%. Iyo yakaomeswa, kupfeka kuramba, kupenengura, kusaneta uye kusaita tsaona zvimisikidzo zvemabheji ekuchengetedza zvinobvisa chiitiko chekupenengura cheiyo roll body surface uye roll cutoff tsaona. Cr4, Cr5 simbi yekuchengeta mipumburu yakanakira simbi inomhanya uye semi-yakakwira-kumhanya simbi yekushanda mipumburu.

Hunhu hweHigh-speed steel roll (HSS roll)

1. High-speed steel roll zvinhu zvine alloy zvinhu zvakakwirira zvakadai sevanadium, tungsten, chromium, molybdenum, uye niobium. Mhando dzema carbides muchimiro chemupumburu anonyanya MC uye M2C. Kuenzanisa ne ductile iron rolls ne-high-nickel-chromium rolls, iyo simbi inodarika vhoriyamu yakakwira nguva imwe neimwe, iyo inochengetedza nguva yekuchinja kwemapumburu, inovandudza mashandiro echigayo uye inoderedza mutengo wekugadzira.

2. High-speed simbi mipumburu ine kunaka kwekushisa kugadzikana. Pakutenderera tembiricha, iyo roll pamusoro ine yakanyanya kuoma uye yakanaka kupfeka kuramba.
High-speed simbi mipumburu ine kunaka kuomarara, uye kuoma kubva pamusoro pemuviri we roll kusvika mukati meiyo dhizaini yekushanda hakuwanzo kuderera, nekudaro kuve nechokwadi kuti mipumburu ine zvakaenzana kunaka kupfeka kusagadzikana kubva kunze kusvika mukati.

3. Munguva yekushandiswa kwepamusoro-speed iron rolls, pasi pemamiriro akanaka ekutonhora, firimu yakaonda uye dense oxide inoumbwa pamusoro pemuviri wepumburu. Iyi yunifomu, yakaonda uye dense oxide firimu inogona kuvapo kwenguva yakareba isina kudonha, ichiita iyo yepamusoro-yekumhanya simbi rolls kupfeka-inodzivirira kuvandudzwa zvakanyanya.

4. High-speed simbi mipumburu ane yakakura zvinhu kuwedzera coefficient uye yakanaka thermal conductivity. Iyo HSS rolls inoramba ichiderera nekuda kwekuwedzera kweiyo yakakwirira-kumhanya simbi zvinhu pachavo. Munguva yekukungurusa, shanduko yegorofu inoputika idiki, uye kuwirirana kwegomba uku kunochengetedzwa kwenguva yakareba, kunyanya kana kukungurutsa bhari kana rebar, izvo zvinonyanya kutungamira kudzora kushivirira kwakashata kweiyo rolling material.
5. Nheyo ye centrifugally cast high-speed steel roll inogadzirwa nealloy ductile iron, saka, simba remutsipa repumburu rakasimba.

Application
Bar rolling mill, splitter mill rack, high-speed waya tsvimbo yekupedzisa chigayo, inopisa-yakakungurutswa nhete yekupedzisa chigayo, chikamu uye groove steel rolling mill.