Cov hom thiab kev tsim cov txheej txheem ntawm cov hlau yob tau hloov zuj zus nrog kev nce qib ntawm cov cuab yeej siv hlau thiab kev hloov pauv ntawm cov khoom siv dov zeb. Hauv Nruab Nrab Hnub nyoog, qis-lub zog grey cam khwb cia hlau yob tau siv rau dov mos uas tsis yog-ferrous hlau. Nyob rau hauv nruab nrab- xyoo pua 18th, Tebchaws Askiv tau paub txog kev tsim cov tshuab chilled cam khwb cia hlau yob rau dov steel phaj. Kev nce qib hauv European steelmaking technology nyob rau hauv ib nrab ntawm lub xyoo pua puv 19 yuav tsum tau dov ntawm cov tonnage steel ingots loj dua, thiab lub zog ntawm ob qho tib si grey cam khwb cia hlau thiab chilled cam khwb cia hlau yob tsis txaus. Cov cam khwb cia hlau yob nrog cov ntsiab lus carbon ntawm 0.4% - 0.6% tau tsim tom qab. Lub advent ntawm hnyav forging khoom ntxiv txhim kho lub zog thiab toughness ntawm forged yob nrog no muaj pes tsawg leeg. Thaum pib ntawm lub xyoo pua 20th, kev siv cov khoom siv alloying thiab kev qhia txog kev kho cua sov ua kom zoo dua qub thiab tawv tawv ntawm cam khwb cia thiab forged kub thiab txias dov yob. Qhov sib ntxiv ntawm molybdenum rau cam khwb cia hlau yob rau kub- dov daim hlau thiab strips txhim kho qhov zoo ntawm cov khoom dov. Txoj kev flushing-based composite casting txoj kev txhim kho lub zog tseem ceeb ntawm cam khwb cia yob.
Kev siv ntau ntawm cov ntsiab lus alloying hauv dov zeb yob pib tom qab Tsov Rog Ntiaj Teb Zaum II. Qhov no yog qhov tshwm sim los ntawm kev txhim kho cov khoom siv dov zeb mus rau qhov loj dua, txuas ntxiv, siab - nrawm, thiab kev ua haujlwm tsis siv neeg, nrog rau kev ua kom muaj zog thiab deformation tsis kam ntawm cov ntaub ntawv dov, uas tso cov kev xav tau ntau dua ntawm kev ua haujlwm yob. Thaum lub sij hawm no, semi- steel rolls thiab ductile hlau rolls tshwm. Powdered tungsten carbide yob tau ua tiav tom qab xyoo 1960. Nyob rau hauv thaum ntxov 1970s, lub centrifugal casting tshuab thiab sib txawv kub kub kho tshuab rau yob, dav txhawb nyob rau hauv Nyiv thiab Europe, ho txhim kho tag nrho cov kev ua tau zoo ntawm strip rolls. Composite siab-chromium cam khwb cia hlau yob kuj tau ua tiav hauv cov kub- yob mills. Nyob rau tib lub sijhawm, forged dawb cam khwb cia hlau thiab semi{12}} steel yob tau siv nyob rau hauv Nyiv. Nyob rau xyoo 1980, Tebchaws Europe tau tshaj tawm siab -chromium steel rolls, ultra-tuab rolls txias txias, thiab tshwj xeeb alloy cam khwb cia hlau yob rau ua tiav cov ntu me me thiab cov hlua hlau. Txoj kev loj hlob ntawm kev siv tshuab dov niaj hnub tau txhawb nqa kev txhim kho thiab kev tshawb fawb ntawm ntau dua -kev ua haujlwm yob. Composite rolls nrog lub siab - lub zog, siab - toughness forged steel los yog ductile hlau core thiab ib tug siab - ceev steel txheej txheej, tsim siv centrifugal casting thiab tshiab composite txoj kev xws li nruam casting composite txoj kev (CPC txoj kev), tshuaj tsuag deposition txoj kev (Osprey txoj kev), electroslag, kub welding txheej txheem rolls, tau siv nyob rau hauv tshiab - tiam profile, hlau pas nrig, thiab strip dov mills nyob rau hauv cov teb chaws Europe thiab Nyiv.
Tuam Tshoj tau pib ntau lawm ntawm cam khwb cia yob nyob rau hauv lub xyoo 1930s, tab sis ntau yam yog heev txwv. Thaum xyoo 1950s, Tuam Tshoj thawj qhov tshwj xeeb yob cog tau tsim nyob rau hauv Xingtai, Hebei Xeev. Xyoo 1958, Anshan Iron thiab Steel Company yog thawj zaug hauv ntiaj teb los sim- tsim thiab siv cov hlau yob loj rau thawj dov (1050 hli). Hauv xyoo 1960, kev ua haujlwm txias dov thiab cov hlau forged loj tau ua tiav tiav. Thaum xyoo 1970s, Taiyuan Hlau thiab Hlau Tuam Txhab thiab Tuam Txhab Tuam Txhab Hlau thiab Hlau Tshawb Fawb tau sib koom ua tiav kev sim - tsim cov centrifugally cam khwb cia hlau yob rau cov sawb kub mills thiab kub strip wide steel mills. Xingtai Metallurgical Machinery Roll Co., Ltd. tau ua tiav kev sim- tsim ib nrab- steel ua haujlwm yob rau kub strip wide steel mills thiab ua hauj lwm yob rau txias strip wide steel mills. Nyob rau xyoo 1980, Tuam Tshoj tau ua tiav ntau yam tshiab xws li forged steel txhawb nqa yob, forged semi{19}} hlau thiab forged dawb cam khwb cia hlau yob, hmoov tungsten carbide yob nplhaib, thiab siab - chromium cam khwb cia hlau yob. Los ntawm xyoo 1990, Tuam Tshoj cov yob ntau lawm tau ua tau raws li cov kev xav tau hauv tsev thiab muaj qee qhov kev xa tawm, tab sis ntau yam yuav tsum tau nce ntxiv thiab qhov zoo tseem xav tau los txhim kho.
