30results about How to "High and stable nitrogen yield" patented technology

The invention belongs to the field of steel metallurgy, in particular to a Ti-contained microalloy building steel bar and a production method of the Ti-contained microalloy building steel bar. The Ti-contained microalloy building steel bar and the production method of the Ti-contained microalloy building steel bar aim to solve the problems that in the prior art, the selected vanadium nitride alloyused for preparing nitrogen-contained alloy steel is low in nitrogen content, less in type and the like. The Ti-contained microalloy building steel bar comprises, by weight, 0.15%-0.30% of C, 0.30%-1.00% of Si, 0.60%-1.30% of Mn, 0.0060%-0.0180% of N, not larger than 0.040% of P, not larger than 0.040% of S, 0.010%-0.050% of Ti and the balance Fe and inevitable impurities. The key of the preparation method of the Ti-contained microalloy building steel bar is that N-contained core-spun wires are fed at a furnace rear small platform, and the content of N is adjusted to be the appropriate level.The production method of the Ti-contained microalloy building steel bar is easy to operate, the nitrogen yield is high and stable, the production cost can also be effectively reduced, and the Ti-contained microalloy building steel bar and the production method of the Ti-contained microalloy building steel bar are worthy of application and popularization.

The invention belongs to the field of ferrous metallurgy, and particularly relates to a micro-alloy building steel bar containing Ti and Cr and a production method of the micro-alloy building steel bar. The micro-alloy building steel bar containing Ti and Cr and the production method of the micro-alloy building steel bar aim to solve the problems that the nitrogen content of an existing vanadium nitride alloy which is selected and used for preparing nitrogen-containing alloy steel is low, and the variety is small. The micro-alloy building steel bar comprises the compositions of, by weight, 0.15-0.30% of C, 0.30-1.00% of Si, 0.60-1.30% of Mn, 0.0060-0.0180% of N, less than or equal to 0.040% of P, less than or equal to 0.040% of S, 0.010-0.050% of Ti, 0.10-0.60% of Cr and the balance Fe andunavoidable impurities. The key point of the preparation method of the micro-alloy building steel bar lies in that a cored wire containing N is fed into a small platform behind a furnace, and the content of N is adjusted to be at an appropriate level. According to the production method of the micro-alloy building steel bar, operation is simple, the nitrogen yielding rate is high and stable, the production cost can further be effectively reduced, and the production method is worth being applied and popularized.

The invention belongs to the field of iron and steel metallurgy, and particularly relates to a V-containing microalloy building steel bar and a production method thereof. According to the V-containingmicroalloy building steel bar and the production method thereof, the problems that a vanadium nitride alloy selected by an existing prepared nitrogen-containing alloy steel is low in nitrogen content, few in kind and the like are solved. The bar comprises the compositions of, by weight, 0.15-0.30% of C, 0.30-1.00% of Si, 0.60-1.30% of Mn, 0.0060-0.0180% of N, no more than 0.040% of P, no more than 0.040% of S, 0.010-0.160% of V, and the balance Fe and unavoidable impurities. The preparation method is characterized in that N-containing core-spun yarn is fed into an after-furnace small platform, and N is adjusted to the appropriate level. The method is simple in operation, the nitrogen recovery rate is high, and stability is achieved; and the production cost can further be effectively reduced, and the method is worth using and popularizing.

The invention belongs to the field of iron and steel metallurgy and particularly relates to a microalloy building steel bar containing V and Ti and a production method thereof. The microalloy buildingsteel bar containing V and Ti and the production method thereof are provided aiming at the problems of low nitrogen content, few types and the like of a vanadium nitride alloy which is adopted for preparing nitrogen-containing alloy steel in the prior art. The microalloy building steel bar comprises the components of, by weight, 0.15%-0.30% of C, 0.30%-1.00% of Si, 0.60%-1.30% of Mn, 0.0060%-0.0180% of N, no more than 0.040% of P, no more than 0.040% of S, 0.010%-0.100% of V, 0.010%-0.030% of Ti and the balance Fe and inevitable impurities. The key step of the preparation method of the microalloy building steel bar containing V and Ti is that N-containing cored wires are fed in a small platform behind a furnace, and the N content is adjusted to the appropriate level. The production methodis easy to operate, the nitrogen yield is high and stable, the production cost can be further reduced effectively, and thus the production method is worth applying and popularizing.

The invention belongs to the field of steel metallurgy and particularly relates to a Ti-containing microalloy constructional steel bar material and a LF furnace production method thereof. The Ti-containing microalloy constructional steel bar material and the LF furnace production method thereof aim at solving the problems that at present, vanadium nitride alloys selected for producing nitrogen-containing alloy steel are low in nitrogen content, small in number of varieties and the like. The bar material comprises, by weight percentage, 0.15-0.30% of C, 0.30-1.00% of Si, 0.60-1.30% of Mn, 0.0060-0.0180% of N, less than or equal to 0.040% of P, less than or equal to 0.040% of S, 0.010-0.050% of Ti and the balance Fe and inevitable impurities. According to the production method of the Ti-containing microalloy constructional steel bar material, the key point lies in that a N-containing core-spun yarn is fed into a LF furnace after refining is completed, and the N content is adjusted to theproper level. The method is easy to operate, high in nitrogen yield, stable, capable of effectively lowering production cost and worthy of being applied and popularized.

The invention belongs to the field of ferrous metallurgy, and particularly relates to a V and Cr containing microalloy building steel wire rod and a production method thereof. The V and Cr containingmicroalloy building steel wire rod and the production method thereof are provided according to the problems that vanadium nitride alloys selected for preparing nitrogen containing alloy steel in the prior art are low in nitrogen content, few in kind and the like. The steel wire rod comprises, by weight percent, 0.15%-0.30% of C, 0.30%-1.00% of Si, 0.60%-1.30% of Mn, 0.0060%-0.0180% of N, not larger than 0.040% of P, not larger than 0.040% of S, 0.010%-0.160% of V, 0.10%-0.60% of Cr and the balance Fe and inevitable impurities. The preparation method of the steel wire rod is characterized in that an N containing cored wire is fed into a furnace rear small platform, and N is adjusted to the proper level. The method is simple in operation, the nitrogen yield is high and stable, the productioncost can be effectively reduced, and the method is worthy of use and popularization.

The invention belongs to the field of iron and steel metallurgy, and particularly relates to a building steel bar containing V, Ti and Cr microalloys as well as an LF (ladle furnace) production methodof the building steel bar. In order to solve the problems that vanadium nitride alloys selected for the preparation of nitrogen alloy steel are low in nitrogen content, and the types of the vanadiumnitride alloys are less, the building steel bar and the LF production method are provided. The building steel bar comprises the following components in percentage by weight: 0.15-0.30% of C, 0.30-1.00% of Si, 0.60-1.30% of Mn, 0.0060-0.0180% of N, not more than 0.040% of P, not more than 0.040% of S, 0.010-0.100% of V, 0.010-0.030% of Ti, 0.10-060% of Cr, and the balance Fe and inevitable impurities. The key of a method for preparing the building steel bar is to feed a nitrogen-containing cored wire into a steel ladle after LF refining so as to adjust the nitrogen content to an appropriate level; the LF production method is simple to operate; the nitrogen yield is high and stable; furthermore, the production cost can be effectively reduced; and the building steel bar and the LF productionmethod are worthy of popularization and utilization.

The invention belongs to the field of steel and iron metallurgy, and in particular, relates to a V and Cr-contained microalloy construction steel rod and a preparation method thereof. Aiming at the problems of low nitrogen content and few types of vanadium nitride alloys selected for traditional preparation of nitrogen-contained alloy steel, the invention provides the V and Cr-contained microalloyconstruction steel rod and the preparation method thereof. The rod comprises the following components in percentage by weight: 0.15-0.30% of C, 0.30-1.00% of Si, 0.60-1.30% of Mn, 0.0060-0.0180% of N, P not more than 0.040%, S not more than 0.040%, 0.010-0.160% of V, 0.10-0.60% of Cr, and the balance of Fe and inevitable impurities. The preparation method is characterized in that N-contained core-spun yarns are fed in a small platform after a furnace and N is adjusted to a proper level. The method is simple in operation; the nitrogen yield is high and stable; the production cost can be effectively reduced; and the method deserves popularization and application.

The invention belongs to the field of steel metallurgy and particularly relates to a microalloy building steel wire rod containing V, Ti and Cr and a production method of the microalloy building steelwire rod. The microalloy building steel wire rod containing V, Ti and Cr and the production method of the microalloy building steel wire rod are provided for solving the problems that vanadium nitride alloys are adopted for preparing nitrogen-containing alloy steel at present, the nitrogen content is low, and kinds are few. The steel wire rod includes, by weight, 0.15%-0.30% of C, 0.30%-1.00% ofSi, 0.60%-1.30% of Mn, 0.0060%-0.0180% of N, smaller than or equal to 0.040% of P, smaller than or equal to 0.040% of S, 0.010%-0.100% of V, 0.010%-0.030% of Ti, 0.10%-0.60% of Cr and the balance Fe and inevitable impurities. The preparing method of the microalloy building steel wire rod containing V, Ti and Cr is characterized in that N-containing core spun yarn is fed into a small platform behind a furnace, and N is adjusted to the proper level. The method is easy to operate, the nitrogen yield is high and stable, the production cost can also be effectively reduced, and the method is worthyof application and popularization.

The invention belongs to the field of steel and iron metallurgy, and in particular, relates to a V, Nb, Ti and Cr-contained microalloy construction steel rod and a preparation method thereof. Aiming at the problems of low nitrogen content and few types of vanadium nitride alloys selected for traditional preparation of nitrogen-contained alloy steel, the invention provides the V, Nb, Ti and Cr-contained microalloy construction steel rod and the preparation method thereof. The rod comprises the following components in percentage by weight: 0.15-0.30% of C, 0.30-1.00% of Si, 0.60-1.30% of Mn, 0.0060-0.0180% of N, P not more than 0.040%, S not more than 0.040%, 0.010-0.080% of V, 0.010-0.030% of Nb, 0.010-0.030% of Ti, 0.10-0.60% of Cr, and the balance of Fe and inevitable impurities. The preparation method is characterized in that N-contained core-spun yarns are fed in a small platform after a furnace and N is adjusted to a proper level. The method is simple in operation; the nitrogen yield is high and stable; the production cost can be effectively reduced; and the method deserves popularization and application.

The invention belongs to the field of steel metallurgy and particularly relates to a V-containing microalloy building steel wire rod and an LF furnace production method of the V-containing microalloybuilding steel wire rod. The V-containing microalloy building steel wire rod and the LF furnace production method of the V-containing microalloy building steel wire rod are provided for solving the problems that vanadium nitride alloys are adopted for preparing nitrogen-containing alloy steel at present, the nitrogen content is low, and kinds are few. The steel wire rod includes, by weight, 0.15%-0.30% of C, 0.30%-1.00% of Si, 0.60%-1.30% of Mn, 0.0060%-0.0180% of N, smaller than or equal to 0.040% of P, smaller than or equal to 0.040% of S, 0.010%-0.160% of V and the balance Fe and inevitableimpurities. The preparing method of the V-containing microalloy building steel wire rod is characterized in that N-containing core spun yarn is fed into a LF furnace, and N is adjusted to the properlevel. The method is easy to operate, the nitrogen yield is high and stable, the production cost can also be effectively reduced, and the method is worthy of application and popularization.