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45#無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)(guan)為優質(zhi)碳(tan)素結(jie)構(gou)用(yong)(yong)(yong)鋼(gang) 硬度(du)不高(gao)(gao)易切削加(jia)工模具(ju)中(zhong)常用(yong)(yong)(yong)來做模板(ban)梢子導柱等(deng)但(dan)須熱處(chu)理 45號(hao)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)鋼(gang)淬火(huo)(huo)后沒有回火(huo)(huo)之(zhi)前(qian)，硬度(du)大于(yu)(yu)HRC55(限(xian)高(gao)(gao)可達HRC62)為合格。實際應(ying)用(yong)(yong)(yong)的限(xian)高(gao)(gao)硬度(du)為HRC55(高(gao)(gao)頻(pin)淬火(huo)(huo)HRC58)。45#無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)鋼(gang)管(guan)(guan)(guan)(guan)(guan)不要(yao)采用(yong)(yong)(yong)滲碳(tan)淬火(huo)(huo)的熱處(chu)理工藝。調質(zhi)處(chu)理后零件(jian)具(ju)有良(liang)好的綜合機(ji)械(xie)(xie)性能，廣泛應(ying)用(yong)(yong)(yong)于(yu)(yu)各種重(zhong)要(yao)的結(jie)構(gou)零件(jian)，特別是(shi)(shi)那些在交變負荷下工作的連桿、螺栓、齒輪及(ji)軸類等(deng)。但(dan)表面硬度(du)較低，不耐(nai)磨。可用(yong)(yong)(yong)調質(zhi)+表面淬火(huo)(huo)提(ti)高(gao)(gao)零件(jian)表面硬度(du)。結(jie)構(gou)用(yong)(yong)(yong)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(GB/T8162-2008)是(shi)(shi)用(yong)(yong)(yong)于(yu)(yu)一(yi)(yi)般結(jie)構(gou)和(he)機(ji)械(xie)(xie)結(jie)構(gou)的無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)。流體輸送用(yong)(yong)(yong)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(GB/T8163-2008)是(shi)(shi)用(yong)(yong)(yong)于(yu)(yu)輸送水、油、氣等(deng)流體的一(yi)(yi)般無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)。低中(zhong)壓(ya)鍋爐(lu)用(yong)(yong)(yong)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(GB3087-2008)是(shi)(shi)用(yong)(yong)(yong)于(yu)(yu)制造各種結(jie)構(gou)低中(zhong)壓(ya)鍋爐(lu)過熱蒸(zheng)汽管(guan)(guan)(guan)(guan)(guan)、沸水管(guan)(guan)(guan)(guan)(guan)及(ji)機(ji)車鍋爐(lu)用(yong)(yong)(yong)過熱蒸(zheng)汽管(guan)(guan)(guan)(guan)(guan)、大煙管(guan)(guan)(guan)(guan)(guan)、小(xiao)煙管(guan)(guan)(guan)(guan)(guan)和(he)拱磚(zhuan)管(guan)(guan)(guan)(guan)(guan)用(yong)(yong)(yong)的優質(zhi)碳(tan)素結(jie)構(gou)鋼(gang)熱軋和(he)冷拔(ba)(軋)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)。高(gao)(gao)壓(ya)鍋爐(lu)用(yong)(yong)(yong)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(GB5310-2008)是(shi)(shi)用(yong)(yong)(yong)于(yu)(yu)制造高(gao)(gao)壓(ya)及(ji)其(qi)以(yi)上壓(ya)力的水管(guan)(guan)(guan)(guan)(guan)鍋爐(lu)受熱面用(yong)(yong)(yong)的優質(zhi)碳(tan)素鋼(gang)、合金(jin)鋼(gang)和(he)不銹耐(nai)熱鋼(gang)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)。化(hua)肥設備(bei)用(yong)(yong)(yong)高(gao)(gao)壓(ya)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)(GB6479-2000)是(shi)(shi)適用(yong)(yong)(yong)于(yu)(yu)工作溫度(du)為-40~400℃、工作壓(ya)力為10~30Ma的化(hua)工設備(bei)和(he)管(guan)(guan)(guan)(guan)(guan)道的優質(zhi)碳(tan)素結(jie)構(gou)鋼(gang)和(he)合金(jin)鋼(gang)無(wu)(wu)(wu)(wu)縫(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(guan)(guan)(guan)。

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