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鋼(gang)(gang)(gang)材(cai)應用廣(guang)泛、品種繁多(duo),根據(ju)斷面(mian)形狀的不同(tong),鋼(gang)(gang)(gang)材(cai)一般分(fen)為型材(cai)、板材(cai)、管材(cai)和金屬(shu)制品四大(da)(da)類。鋼(gang)(gang)(gang)材(cai)是(shi)(shi)鋼(gang)(gang)(gang)錠、鋼(gang)(gang)(gang)坯或鋼(gang)(gang)(gang)材(cai)通(tong)過壓力加(jia)工(gong)(gong)(gong)制成的一定形狀、尺寸(cun)和性(xing)能的材(cai)料。大(da)(da)部分(fen)鋼(gang)(gang)(gang)材(cai)加(jia)工(gong)(gong)(gong)都是(shi)(shi)通(tong)過壓力加(jia)工(gong)(gong)(gong),使被加(jia)工(gong)(gong)(gong)的鋼(gang)(gang)(gang)(坯、錠等(deng))產生塑性(xing)變形。根據(ju)鋼(gang)(gang)(gang)材(cai)加(jia)工(gong)(gong)(gong)溫(wen)度不同(tong),可以分(fen)為冷加(jia)工(gong)(gong)(gong)和熱加(jia)工(gong)(gong)(gong)兩種。