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[提要]  新修訂的《混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》已將HRB400級(jí)鋼筋作為混凝土結(jié)構(gòu)中的主導(dǎo)鋼筋，結(jié)合首鋼總公司對(duì)HRB400級(jí)鋼筋的研制和生產(chǎn)，介紹了其微合金化機(jī)理、性能和工程應(yīng)用。采用釩氮微合金化工藝生產(chǎn)的HRB400級(jí)鋼筋強(qiáng)度高、延性好、焊接性能良好、質(zhì)量穩(wěn)定、強(qiáng)度價(jià)格比高。試設(shè)計(jì)表明，將其應(yīng)用于混凝土工程具有良好的經(jīng)濟(jì)效益和社會(huì)效益。
[關(guān)鍵詞]  HRB400級(jí)鋼筋  微合金化  性能  工程應(yīng)用

Based on its development and production in Shougang General Company, the microalloying mechanism, performance and engineering application of HRB400 steel bar are briefly described. V-N microalloyed HRB400 steel bar has many advantages such as high strength, high ductility, perfect welding performance, stable quality and high strength-cost ratio. The application of HRB400 steel bar in concrete structure will generate perfect economic and social benefits.
Keywords:  HRB400 steel bars; microalloying; performance; engineering application