11results about How to "Spheroidizing effect is stable" patented technology

The invention relates to a preparation method of a low-magnesium nodulizer, and the preparation method belongs to the technical field of nodular cast iron. The preparation method takes magnesium powder, yttrium powder, cerium powder and calcium powder as raw materials, and prepares the low-magnesium nodulizer; the magnesium is a basic graphite spheroidizing element, the chemical property of magnesium is active, the desulfurization and deoxygenation capacity is high, the generated sulfide and oxide are high in melting points, low in density and prone to float out of molten iron to be removed, the spheroidizing capacity of rare earth elements such as yttrium and cerium is high, the added rare earth elements such as yttrium and cerium can play a good auxiliary spheroidizing role, the added yttrium and cerium elements can reduce the adding amount of magnesium and possible black slag defects, and a stable spheroidizing effect can be achieved even if the sulfur content of molten base iron ishigh; and by adding calcium into the molten iron, the effects of deoxidizing, desulfurizing and improving the surface tension of the molten iron can be achieved, the adding amount of main spheroidizing elements can be reduced, and the spheroidizing effect is enhanced.

The invention relates to a ductile iron rare earth Mg-Si nodularizer used in the conventional pour-over process spheroidization treatment of the ductile iron production process. The raw materials contain magnesium ingot, silicon calcium alloy, silicon barium alloy, rare earth ferrosilicon alloy and 75 ferrosilicon and comprise the following components by weight percent: 10-14% of Mg, 1.0-4.0% of Re, 35-50% of Si, 2.0-6.0% of Ca or Ca and Ba and the balance Fe. The nodularizer is produced by the conventional mix-melting method, is irregularly massive and has the grain size between 3-25mm to 5-40mm. By using the nodularizer of the invention, the magnesium content can be increased, the spheroidization treatment cost can be significantly reduced; and the spheroidization quality is stable, the roundness of graphite nodules is good, Re, Ca and Ba are added to realize the functions of purifying molten iron, promoting graphitization, delaying degradated spheroidization, promote nucleation to form fine-grained structure and the like.

The invention discloses an integrated convenient-to-hang environment-friendly high-performance liquid alloy half-pressure container and a using method. The container comprises a container body capable of turning over, a receiving trough matched with the container body is arranged at the upper end of the container body, a cantilever is connected to the top end of the receiving trough and mounted on a frame which is connected with two side faces of the container body, an iron filling hole communicated with the inside of the container body is formed in the receiving trough, and a slag avoiding mouth communicated with the inside of the container body is connected to the side face of the container body. The container and the using method have the advantages that environmental protection and greenness are realized, and local environmental pollution is reduced by more than 90%; magnesium absorption rate and nodulizing grade are high; consumption of nodulizing agents is less, and heat insulation effect is good; nodulizing effect is stable; iron liquid is basically lossless; physical properties of castings are improved; a container cover is omitted, so that labor intensity of workers is reduced.

The invention discloses a cast iron spheroidizing treatment system which comprises a spheroidizing ladle and a feeding mechanism for feeding a spheroidizing agent to the bottom of an inner cavity of the spheroidizing ladle. A lining of the spheroidizing ladle comprises a reinforcing part formed by mechanical pressing, the reinforcing part is at least arranged at the bottom of the inner cavity of aspheroidizing bag body, and a viscous filling layer is arranged between the reinforcing part and the side wall of the spheroidizing ladle body. The feeding mechanism comprises a containing part for containing the spheroidizing agent, a hoisting part for vertically hoisting the containing part and a driving part for driving the containing part to enter the bottom of the spheroidizing ladle downwards and leave the spheroidizing ladle upwards; and the containing part is provided with a release valve plate capable of being opened to release the spheroidizing agent after entering the bottom of thespheroidizing ladle. The lining of the spheroidizing ladle is prefabricated, so that the bottom of the ladle lining is more compact, the strength of the bottom of the ladle lining is greatly improved, and the time spent by replacing a new ladle lining is saved. Through the arrangement of the feeding mechanism, the spheroidizing agent makes sufficient contact with molten iron for reaction, the absorption rate of the spheroidizing agent is improved, the spheroidizing effect is stable, and the spheroidizing quality is high.

A dot-graphite cast iron contanis C (2.2-3.6 wt.%), Si (1.0-1.8), Mn (0.4-1.2) and Fe (rest). It is prepared through smelting iron in copola furnace while controlling the contents of C, Si and Mn, adding modifier (SiFe, RE-SiFe, SiCa, Or AlBiSb alloy) to casting lalde, laying aside for 3-5 min, skimming, and casting at 1350 deg.C. The performance of its casting is higher than that of nodular graphite cast iron.

The invention discloses a method for producing a core part of a centrifugal roller by a spheroidizing process, and belongs to the field of roller cores. The method comprises the following steps: a, adding raw materials into a smelting furnace for smelting; b, discharging molten iron after reaching a tapping temperature, entering a molten iron ladle, and transferring the molten iron ladle to a side absorption type dust removal station through a crane; c, pouring the molten iron in the ladle into a pouring ladle filled with a spheroidizing agent for spheroidizing; d, performing slagging-off and temperature control on the molten iron in the pouring ladle; e, performing pouring on the roller core, wherein the tapping temperature of the molten iron in the step b is 1,420-1,540 DEG C and the spheroidizing temperature for pouring the molten iron into the pouring ladle in the step c is 1,380-1,510 DEG C. The method for producing the core part of the centrifugal roller reduces production cost, alleviates pollution and meets environmental protection and clean production requirements.

The invention discloses an integrated convenient-to-hang environment-friendly high-performance liquid alloy half-pressure container and a using method. The container comprises a container body capable of turning over, a receiving trough matched with the container body is arranged at the upper end of the container body, a cantilever is connected to the top end of the receiving trough and mounted on a frame which is connected with two side faces of the container body, an iron filling hole communicated with the inside of the container body is formed in the receiving trough, and a slag avoiding mouth communicated with the inside of the container body is connected to the side face of the container body. The container and the using method have the advantages that environmental protection and greenness are realized, and local environmental pollution is reduced by more than 90%; magnesium absorption rate and nodulizing grade are high; consumption of nodulizing agents is less, and heat insulation effect is good; nodulizing effect is stable; iron liquid is basically lossless; physical properties of castings are improved; a container cover is omitted, so that labor intensity of workers is reduced.

The invention discloses a cast iron spheroidizing treatment system, which comprises a spheroidizing bag and a feeding mechanism for feeding a nodulizing agent to the bottom of the inner cavity of the spheroidizing bag. The lining of the spheroidizing package includes a reinforcement part obtained by mechanical pressing, the reinforcement part is at least arranged at the bottom of the inner cavity of the spheroidizing package body, and a viscous filling layer is arranged between the reinforcement part and the side wall of the spheroidizing package body. The dispensing mechanism includes an accommodating part for containing the nodulizer, a hoisting part for vertically hoisting the accommodating part, and a driving part for driving the accommodating part to enter the bottom of the spheroidizing bag downwards and leave the nodulizing bag upwards; the accommodating part has The release valve plate for releasing the nodulizing agent can be opened after the bottom of the nodulizing bag. The inner lining of the spheroidizing bag is prefabricated, which makes the bottom of the bag substrate more compact, greatly improves the strength of the bottom of the bag substrate, and saves time for replacing a new bag lining. Through the setting of the feeding mechanism, the nodulizer can be fully contacted and reacted with the molten iron, the absorption rate of the nodulizer can be improved, the spheroidization effect is stable, and the spheroidization quality is high.

The invention relates to a nodular cast iron rare-earth magnesium silicon nodularizer, comprising the following components by weight percent: 12-15% of Mg, 0.5-2.0% of Re, 42-50% of Si, 3.5-5.5% of Ca, 0.5-1.0% of Ba, 2.0-5.0% of Mn, 0.5-1.5% of C, less than 1.5% of Al, and the balance of Fe. The components are prepared into granules by a conventional mix-melting method and crushing, so as to obtain the nodular cast iron rare-earth magnesium silicon nodularizer. The nodularizer is in an irregular block shape; the grain size is 3-25mm or 5-40mm. According to the nodular cast iron rare-earth magnesium silicon nodularizer, the content of magnesium is improved; the spheroidisation cost can be significantly reduced; meanwhile, the nodular cast iron rare-earth magnesium silicon nodularizer is stable in spheroidisation quality and good in graphite ball roundness; the effects such as purification of molten iron, facilitation of graphitization, delaying of degraded spheroidization and facilitation of nucleation refined organization and the like can be achieved by adding Re, Ca, Ba, Mn and C.

The invention relates to a composite modifier for nodular cast iron, in particular to the composite modifier for titanium nickel-manganese iron alloy supported nano zirconia-titanium nitride nodular cast iron and a preparation method of the composite modifier. The modifier is prepared from the following raw materials in parts by weight: 3 to 5 parts of titanium-nickel alloy 60, 0.2 to 0.3 part of sodium fluoride, 1 to 2 parts of nano zirconia, 2 to 3 parts of nano-titanium nitride, 3 to 4 parts of nitrided ferromanganese, 3 to 5 parts of expansible graphite powder, 1 to 3 parts of ferrosilicon powder with the silicon content of 45 percent, 0.3 to 0.4 part of aluminum-magnesium silicate, 20 to 25 parts of ethanol aqueous solution with the concentration of 5 to 10 percent and 0.4 to 0.5 part of assistant. The novel composite modifier disclosed by the invention is prepared by mutually bonding and supporting expansible graphite powder supported nano powder and titanium nickel-ferrosilicon manganese alloy powder; the modifier promotes the graphitization process and improves structural organization; the mechanical property of the nodular cast iron is more excellent, and better modifying effect is efficiently obtained; and in addition, compared with a traditional modifier, the composite modifier disclosed by the invention is more convenient and quicker to use, and the production cost is reduced.

The invention provides an S-shaped variable-speed wire feeding spheroidizing method, and belongs to the technical field of cored wire machining, the S-shaped variable-speed wire feeding spheroidizing method comprises the following steps: S1, a wire feeder drives a cored wire to move to the liquid level of molten iron in a ladle; s2, the wire feeder drives the cored wire to move from the liquid level of the molten iron to the inner bottom of the ladle; and S3, the wire feeding machine drives the cored wire to retreat to a ladle opening of the ladle, the wire feeding machine drives the cored wire to be rapidly fed to the liquid level of the molten iron firstly, then the cored wire slowly moves to the inner bottom of the ladle from the liquid level of the molten iron, finally, the cored wire rapidly moves to the ladle opening of the ladle from the inner bottom of the ladle, and wire feeding is conducted through the S-shaped wire feeding method. The wire feeding time is appropriate, the beat is not affected, the core material of the cored wire is not oxidized when the cored wire is grilled at a high temperature, and finally the spheroidizing effect of the cored wire is stable.