Selective oxidation control method for hot galvanizing dual-phase steel

• Main Authors: ZHANG DAN, LI GUANXIONG, REN QIUHONG, WANG DAOJIN, LIN YINGZHE, ZHENG YANKUN, LIU SHUNMING, LUO XING, GUO MIN, ZHENG XIAOFEI, WANG BAOYONG, LI YAN, WU XUESONG, HAN BANGCAI
• Format: Patent
• Language: Chinese; English
• Published: 13.06.2017
• Subjects: CHEMISTRY; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS

The invention discloses a selective oxidation control method for hot galvanizing dual-phase steel and belongs to the technical field of cold rolling. The selective oxidation control method for the hot galvanizing dual-phase steel comprises the following steps that at least three injecting points are formed in an injecting pipe, injected into the heating section of an annealing furnace, of a humidifier; one end of a nitrogen outlet pipe communicates with the injecting pipe, and a leading in point is arranged on the other end of the nitrogen outlet pipe; the nitrogen leading in point is connected to a high-pressure point, and nitrogen drives vapor of the humidifier to enter the heating section of the annealing furnace through the injecting point; and the hydrogen content of the heating section of the annealing furnace is reduced. According to the selective oxidation control method for the hot galvanizing dual-phase steel, the heating section of the annealing furnace reaches a higher dew point, external oxidatio