The present invention provides an feed method for electroslag remelting furnace which includes the following steps: mounting a wire in a wire feeder, activating the wire feeder, passing the wire through a straightening machine and an insulating sleeve in sequence, and then stopping the wire feeder; mounting an electrode requiring electroslag on an electroslag furnace and placing the same in a crystallizer; activating a control system to start the electroslag production, the control system processing the acquired weight information, length information, and position information and comparing the same with a preset process parameter to form a comparison result; and the control system sending a control instruction according to the comparison result, and automatically adjusting the wire feeding speed of the wire feeder and the lifting height of the lifter. The wire feeding method according to the present invention has the advantages of simple operation and precise control.

The present invention provides an feed method for electroslag remelting furnace which includes the following steps: mounting a wire in a wire feeder, activating the wire feeder, passing the wire through a straightening machine and an insulating sleeve in sequence, and then stopping the wire feeder; mounting an electrode requiring electroslag on an electroslag furnace and placing the same in a crystallizer; activating a control system to start the electroslag production, the control system processing the acquired weight information, length information, and position information and comparing the same with a preset process parameter to form a comparison result; and the control system sending a control instruction according to the comparison result, and automatically adjusting the wire feeding speed of the wire feeder and the lifting height of the lifter. The wire feeding method according to the present invention has the advantages of simple operation and precise control.

Provided is steel for a wind power gear with improved purity and reliability. The chemical components thereof comprise, in percentages by mass: 0.15-0.19% of C, ≤0.4% of Si, 0.5-0.7% of Mn, ≤0.012% of P, ≤0.006% of S, 1.5-1.8% of Cr, 0.28-0.35% of Mo, 1.4-1.7% of Ni, and 0.02-0.04% of Al, with the balance being Fe and inevitable impurities. A smelting method therefor comprises adding raw materials to a converter for primary melting, transferring same to a refining furnace for refining, carrying out continuous casting after vacuum degassing, and transferring same to a gas protection furnace for electroslag remelting. According to the present invention, a pure electroslag master batch is obtained by continuous casting, and the purity of the material is further improved by means of an electroslag remelting procedure; and the prepared steel material is used in a wind power gear, such that the flaw detection pass rate is significantly increased, large-particle inclusions in the steel material are significantly reduced, and the inclusions are fine and dispersed.

Provided is steel for a wind power gear with improved purity and reliability. The chemical components thereof comprise, in percentages by mass: 0.15-0.19% of C, ≤0.4% of Si, 0.5-0.7% of Mn, ≤0.012% of P, ≤0.006% of S, 1.5-1.8% of Cr, 0.28-0.35% of Mo, 1.4-1.7% of Ni, and 0.02-0.04% of Al, with the balance being Fe and inevitable impurities. A smelting method therefor comprises adding raw materials to a converter for primary melting, transferring same to a refining furnace for refining, carrying out continuous casting after vacuum degassing, and transferring same to a gas protection furnace for electroslag remelting. According to the present invention, a pure electroslag master batch is obtained by continuous casting, and the purity of the material is further improved by means of an electroslag remelting procedure; and the prepared steel material is used in a wind power gear, such that the flaw detection pass rate is significantly increased, large-particle inclusions in the steel material are significantly reduced, and the inclusions are fine and dispersed.

The invention relates to a wear-resistant steel with excellent surface quality, which is composed of C: 0.12-0.20%, Si: ≤0.1%, Mn: 0.6-1.20%, Nb: 0.010-0.040%, V: ≤0.01%, Ti: 0.010%-0.030, Al: ≤0.04%, Ni: ≤0.1%, Cu: ≤0.1%, Cr: 0.10-0.40%, Mo: ≤0.1%, B: 0.001-0.005%, Ca: 0.0010-0.0050%, P: ≤0.010%, S: ≤0.0015%, O: ≤0.0012%, N: ≤0.0035%, H: ≤0.0002%, the balance is Fe, and the carbon equivalent CEV≤0.4; PCM≤0.25. The production process flow is: converter smelting->LF refining->VD or Rh high vacuum degassing->continuous casting->heating->rolling->shot blasting->quenching->tempering. The wear-resistant steel of the invention has better surface quality, and there are no surface defects such as air pit, inclusion, hemp pit and pressed iron oxide scale. The depth of surface spots caused by the peeling off iron oxide scale is ≤0.1 mm, and the surface grinding of steel plate cannot be carried out. Based on element design, non-preheating welding and excellent toughness can be further realized.

The invention relates to a wear-resistant steel with excellent surface quality, which is composed of C: 0.12-0.20%, Si: ≤0.1%, Mn: 0.6-1.20%, Nb: 0.010-0.040%, V: ≤0.01%, Ti: 0.010%-0.030, Al: ≤0.04%, Ni: ≤0.1%, Cu: ≤0.1%, Cr: 0.10-0.40%, Mo: ≤0.1%, B: 0.001-0.005%, Ca: 0.0010-0.0050%, P: ≤0.010%, S: ≤0.0015%, O: ≤0.0012%, N: ≤0.0035%, H: ≤0.0002%, the balance is Fe, and the carbon equivalent CEV≤0.4; PCM≤0.25. The production process flow is: converter smelting->LF refining->VD or Rh high vacuum degassing->continuous casting->heating->rolling->shot blasting->quenching->tempering. The wear-resistant steel of the invention has better surface quality, and there are no surface defects such as air pit, inclusion, hemp pit and pressed iron oxide scale. The depth of surface spots caused by the peeling off iron oxide scale is ≤0.1 mm, and the surface grinding of steel plate cannot be carried out. Based on element design, non-preheating welding and excellent toughness can be further realized.

A chromium-bearing, cobalt-based alloys amenable to wrought processing has improved resistance to both chloride-induced crevice corrosion and galling. The alloy contains up to 3.545 wt. % nickel, 0.242 to 0.298 wt. % nitrogen, and may contain 22.0 to 30.0 wt. % chromium, 3.0 to 10.0 wt. % molybdenum, up to 5.0 wt. % tungsten, up to 7 wt. % iron, 0.5 to 2.0 wt. % manganese, 0.5 to 2.0 wt. % silicon, 0.02 to 0.11 wt. % carbon, 0.005 to 0.205 wt. % aluminum, and the balance is cobalt plus impurities.

A process for smelting steel for ultrafine carborundum sawing wires, comprising: 1) in a vacuum induction furnace, using pure iron and low-phosphorus pig iron as raw materials to be melted into molten steel under the protection of argon; vacuumizing and smelting, and degassing; using silicon iron as a deoxidizer to adjust components of the molten steel; and casting a circular ingot in vacuum; 2) cleaning the surface of the circular ingot to produce an electrode bar; 3) remelting and smelting the electrode bar as raw material to a cylindrical electroslag ingot in an electroslag furnace, wherein the electroslag protecting slag comprises: CaF.sub.2: 45-55%, Al.sub.2O.sub.3: 15-25%, SiO.sub.2: 20-25%, Na.sub.2O: 2-4%, and K.sub.2O: 1-2%; 4) forging the electroslag ingot to a square billet; and 5) rolling the forged billet to a steel wire rod, and the steel wire rod comprising [C]: 0.92-1.1%, [Si]: 0.3-0.4%, [Mn]: 0.5-0.8%, [Al]<0.0008%, [N]<0.005%, [S]<0.01%, and [P]<0.015%.

A process for smelting steel for ultrafine carborundum sawing wires, comprising: 1) in a vacuum induction furnace, using pure iron and low-phosphorus pig iron as raw materials to be melted into molten steel under the protection of argon; vacuumizing and smelting, and degassing; using silicon iron as a deoxidizer to adjust components of the molten steel; and casting a circular ingot in vacuum; 2) cleaning the surface of the circular ingot to produce an electrode bar; 3) remelting and smelting the electrode bar as raw material to a cylindrical electroslag ingot in an electroslag furnace, wherein the electroslag protecting slag comprises: CaF.sub.2: 45-55%, Al.sub.2O.sub.3: 15-25%, SiO.sub.2: 20-25%, Na.sub.2O: 2-4%, and K.sub.2O: 1-2%; 4) forging the electroslag ingot to a square billet; and 5) rolling the forged billet to a steel wire rod, and the steel wire rod comprising [C]: 0.92-1.1%, [Si]: 0.3-0.4%, [Mn]: 0.5-0.8%, [Al]<0.0008%, [N]<0.005%, [S]<0.01%, and [P]<0.015%.

Disclosed is a steel composition including specified ranges of Ni; Mo; Co; Mo+Co+Si+Mn+Cu+W+V+Nb+Zr+Ta+Cr+C; Co+Mo; Ni+Co+Mo; and traces of Al; Ti; N; Si; Mn; C; S; P; B; H; O; Cr; Cu; W; Zr; Ca; Mg; Nb; V; and Ta in specified ranges; the remainder being iron and impurities. The inclusion population, as observed by image analysis over a polished surface measuring 650 mm.sup.2 if hot-formed or hot-rolled; and measuring 800 mm.sup.2 if cold-rolled, does not contain non-metallic inclusions of diameter >10 μm, and, in the case of a hot-rolled sheet, does not contain more than four non-metallic inclusions of diameter 5-10 μm over 100 mm.sup.2, the observation being performed by image analysis over a polished surface measuring 650 mm.sup.2.