擋(dang)(dang)(dang)板(ban)(ban)(ban)、軌距擋(dang)(dang)(dang)板(ban)(ban)(ban)擋(dang)(dang)(dang)板(ban)(ban)(ban)是鐵路的重要(yao)組成(cheng)部件之(zhi)一,鐵路用(yong)軌距擋(dang)(dang)(dang)板(ban)(ban)(ban)作(zuo)為(wei)異(yi)型斷面鋼材(cai),目前大量采用(yong)熱軋(ya)方法(fa)生(sheng)產(chan),生(sheng)產(chan)工藝比較復雜,操作(zuo)技術水平(ping)要(yao)求較高。隨(sui)著(zhu)我國(guo)鐵路運輸的發展,對鐵路用(yong)軌距擋(dang)(dang)(dang)板(ban)(ban)(ban)的需求也日益增加。
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