一、熱軋工字鋼和焊接工字鋼的區別在哪里
1、熱軋工字鋼就是經過熱軋工藝處理的,具有工字形截面的實心長條鋼材。主要用在大(da)跨度平面、拱形屋頂鋼(gang)梁及(ji)行車、大(da)型施工(gong)腳手架等。熱軋工(gong)字鋼(gang)因(yin)經過(guo)高溫加熱軋制而成,所以強度不(bu)是很高,但(dan)塑(su)形和(he)可焊性(xing)好,自由扭轉(zhuan)剛度高,在日常(chang)生活中更為常(chang)見。
2、焊接工字鋼的(de)(de)的(de)(de)生產過程就是將厚度(du)適中的(de)(de)帶鋼截成需要的(de)(de)寬度(du),再(zai)將它們(men)在(zai)焊(han)接機上將邊部和腰部焊(han)接在(zai)一起。
3、兩者最大的區別(bie)就是(shi)工(gong)藝不同(tong),熱(re)軋(ya)是(shi)一種(zhong)高效的金(jin)屬(shu)(shu)加工(gong)方法,它可(ke)以大幅度提高金(jin)屬(shu)(shu)材(cai)料(liao)的強(qiang)度和(he)(he)硬度,同(tong)時還能改善其(qi)(qi)塑性和(he)(he)韌(ren)性。熱(re)軋(ya)的過(guo)程(cheng)中,金(jin)屬(shu)(shu)材(cai)料(liao)會(hui)經歷多次輥軋(ya),從(cong)而逐漸形(xing)(xing)成所需(xu)的形(xing)(xing)狀和(he)(he)尺寸。熱(re)軋(ya)還可(ke)以使(shi)金(jin)屬(shu)(shu)材(cai)料(liao)表面形(xing)(xing)成一層(ceng)(ceng)氧(yang)化皮,這(zhe)層(ceng)(ceng)氧(yang)化皮可(ke)以保護金(jin)屬(shu)(shu)材(cai)料(liao)不受腐蝕和(he)(he)氧(yang)化的影響。與(yu)熱(re)軋(ya)相比,焊(han)接(jie)是(shi)一種(zhong)更為靈活(huo)的金(jin)屬(shu)(shu)加工(gong)方法。焊(han)接(jie)可(ke)以將不同(tong)種(zhong)類的金(jin)屬(shu)(shu)材(cai)料(liao)連接(jie)在一起,從(cong)而形(xing)(xing)成更為復(fu)雜的結構。焊(han)接(jie)還可(ke)以在不破(po)壞金(jin)屬(shu)(shu)材(cai)料(liao)的情況下進(jin)行修(xiu)補和(he)(he)加固,從(cong)而延(yan)長其(qi)(qi)使(shi)用壽命。焊(han)接(jie)的過(guo)程(cheng)中,需(xu)要(yao)使(shi)用一定的熱(re)源和(he)(he)壓力(li),以使(shi)金(jin)屬(shu)(shu)材(cai)料(liao)達到熔點并連接(jie)在一起。
二、熱軋工字鋼和焊接工字鋼哪個好
前文已經簡單了(le)解到熱軋(ya)(ya)工字(zi)鋼(gang)和焊接工字(zi)鋼(gang)主要(yao)區別在于工藝,那么熱軋(ya)(ya)工字(zi)鋼(gang)和焊接工字(zi)鋼(gang)哪個好呢?
在規格和材料相同的(de)情(qing)況下(xia)(xia),熱軋(ya)工(gong)(gong)(gong)字(zi)鋼(gang)(gang)可(ke)以代替(ti)焊接(jie)工(gong)(gong)(gong)字(zi)鋼(gang)(gang),而(er)且前者(zhe)(zhe)的(de)質量(liang)優于后者(zhe)(zhe)。一般情(qing)況下(xia)(xia),在結構設計中,多高層建筑宜(yi)(yi)采用(yong)(yong)熱軋(ya)工(gong)(gong)(gong)字(zi)鋼(gang)(gang),門(men)式剛架結構的(de)輕鋼(gang)(gang)廠(chang)房宜(yi)(yi)采用(yong)(yong)焊接(jie)變截面工(gong)(gong)(gong)字(zi)鋼(gang)(gang)。鋼(gang)(gang)材消耗(hao)指標較(jiao)好,但工(gong)(gong)(gong)程造價并沒有節省多少,原(yuan)因是熱軋(ya)工(gong)(gong)(gong)字(zi)鋼(gang)(gang)加工(gong)(gong)(gong)量(liang)小(xiao),工(gong)(gong)(gong)期略短。如果(guo)計算綜合經濟效益(包括項(xiang)目投(tou)入使用(yong)(yong)后的(de)項(xiang)目),在工(gong)(gong)(gong)期起決定性作用(yong)(yong)的(de)情(qing)況下(xia)(xia),可(ke)選(xuan)(xuan)擇熱軋(ya)鋼(gang)(gang)材。工(gong)(gong)(gong)字(zi)鋼(gang)(gang),但是當(dang)工(gong)(gong)(gong)期要(yao)求不(bu)嚴格或一些形象工(gong)(gong)(gong)程時,可(ke)以根據節約資源(yuan)的(de)原(yuan)則選(xuan)(xuan)用(yong)(yong)焊接(jie)工(gong)(gong)(gong)字(zi)鋼(gang)(gang)。