262 results about "Salt bath" patented technology

The invention provides a 10.9-grade non-quenched and tempered cold heading steel wire rod and a production method thereof. The 10.9-grade non-quenched and tempered cold heading steel wire rod comprises the following chemical components: 0.23-0.27% of C, 0.30-0.50% of Si, 1.45-1.55% of Mn, less than or equal to 0.025% of P, less than or equal to 0.025% of S, 0.40-0.50% of Cr, 0.025-0.050% of Ti, 0.0025-0.0050% of B, less than or equal to 0.0050% of N and more than or equal to 0.015% of [Ti]-3.5 * [N]. According to the invention, on the basis of component design, a controlled rolling process deformation induced phase change, an online salt bath isothermal treatment cooling process and an artificial aging process are matched, so that rapid cooling and isothermal phase change of the wire rod are realized, and the prepared wire rod is uniform in through ring mechanical property, high in yield ratio, good in plasticity and long in fatigue life. The steel wire rod can be used for directly cold-drawing the steel wire without annealing, and the cold-drawn steel wire can meet the performance requirement of a 10.9-grade fastener without quenching and tempering after being formed. According to the production method of the wire rod, the production process can be simplified, the fastener production period is shortened, the cost is reduced, meanwhile, the energy consumption is reduced, and the method conforms to the current green and low-carbon development route.

The invention discloses a high-strength wear-resistant self-lubricating drill bit for a coal mine and a preparation method of the high-strength wear-resistant self-lubricating drill bit. The preparation process comprises the steps that a drill bit blank is prepared from low-alloy carbon structural steel, a high-strength and high-toughness matrix is obtained through thermal refining, and then sand blasting activation is conducted to clean and coarsen the surface. After diamond particles are subjected to acid pickling pretreatment, metal modified diamond composite powder is obtained through salt bath metal and reduction prefabrication. The preparation method comprises the following steps: mixing MoS2 with the carbon dioxide, spraying the mixture on the surface of a matrix through high velocity oxy-fuel to form a wear-resistant coating, and then improving the density and interface bonding strength of the coating through high-frequency induction instantaneous remelting, thereby finally obtaining the coal mine drill bit with high hardness, strong bonding force and self-lubricating performance. The metal modified diamond composite coating containing the metal transition layer and the MoS2 lubricating phase is constructed on the steel substrate, and a high-frequency remelting process is combined, so that the wear resistance, the bonding strength and the self-lubricating performance of the drill bit are synergistically improved, and the drill bit has the advantages of high strength and toughness matching and low cost.

The invention relates to the technical field of quenching treatment, in particular to a nodular cast iron isothermal quenching cooling method and an isothermal quenching cooling device.The method comprises the steps that when nodular cast iron of the current batch is subjected to cooling treatment in a cooling stage before isothermal quenching in a salt bath furnace, a thermal image of the surface of the salt bath furnace is collected in real time; acquiring a first characteristic value of each nodular cast iron; obtaining a furnace wall area and a non-furnace wall area in each thermal image; obtaining an average temperature value of each non-furnace-wall area; acquiring a local high-temperature area in each thermal image; acquiring a high-temperature characteristic value of each thermal image; acquiring a second characteristic value of each nodular cast iron; and the optimal rotating speed of the stirring device is obtained when the next nodular cast iron of the nodular cast iron of the current batch is subjected to cooling treatment in the cooling stage before isothermal quenching. The invention aims to improve the isothermal quenching cooling quality of the nodular cast iron by adjusting the rotating speed of the stirring device during the isothermal quenching cooling of the nodular cast iron.

The invention discloses a preparation method and application of a wind cap of a circulating fluidized bed gasifier, the wind cap is arranged at the bottom of a gasifier body, the wind cap mainly comprises a wind cap gas inlet, a wind cap gas outlet and a wind cap gas flow channel, and the wind cap gas flow channel is composed of a Tesla valve fluid channel. The air cap is prepared from modified fly ash through a combined method of freezing ball-milling nano modification, 3D printing coupling microwave-assisted sintering and salt bath chromizing strengthening. According to the method, a large amount of solid waste of fly ash can be consumed to realize carbon emission reduction, the efficiency of the circulating fluidized bed can be improved through structural optimization, meanwhile, the preparation cost of the hood can be reduced, and the method has relatively high application and popularization values.

The invention relates to the technical field of metal heat treatment, in particular to a silicon alloy steel bearing ring high-temperature salt bath quenching process for a high-temperature load environment, which comprises the following steps: S1, carrying out surface sand blasting treatment on a silicon alloy steel bearing ring; s2, stepped heating-heat preservation-cooling treatment is carried out, and the uniformly austenitized ferrule is obtained; s3, the uniformly austenitized ferrule is immersed in a composite salt bath; s4, staged cooling treatment of an air cooling stage and an oil cooling stage is conducted in sequence; s5, the martensite matrix ferrule is subjected to subzero treatment and staged heating; and S6, multi-stage tempering treatment with different temperature gradients is conducted, and the final high-temperature bearing ring is obtained. Through the combined process of stepped austenitizing, composite salt bath ultrasonic quenching, graded cooling, deep cooling and multi-stage tempering, homogenization and stabilization of the structure of the bearing ring are achieved, and the dimensional stability and the tempering resistance of the bearing ring in the high-temperature load environment are improved.

The invention discloses an impurity removal agent for a glass strengthening salt bath and an application method of the impurity removal agent, and the impurity removal agent is prepared from the following components in percentage by mass: 20-75% of silicon oxide, 10-30% of aluminum oxide, 10-40% of sodium oxide and 0.5-50% of calcium oxide. The impurity removal agent can effectively reduce the concentration of P ions in molten salt, the effect is improved along with the increase of the impurity removal agent, the linear law is met, and every 300 g of the impurity removal agent can absorb about 50 ppm of P ions. Experiments prove that after a glass product is strengthened in a salt bath treated by the impurity removal agent disclosed by the invention, the surface of the glass has no undesirable phenomena such as concave and convex points.

The invention discloses a method for preparing bainite steel through multi-element microalloying, and belongs to the technical field of advanced steel and iron materials. The method comprises the following steps that a forged steel ingot is subjected to first austenitizing and cooling treatment, and a martensite matrix is obtained; and then secondary phase precipitation treatment, secondary austenitizing treatment and cooling are sequentially carried out, and the bainite steel is prepared. According to the invention, an innovative heat treatment process path of martensite initial structure-medium-temperature second phase precipitation-short-time austenitizing-salt bath isothermal bainite transformation is constructed, and the synergistic effect of microalloy elements such as V, Nb, Ti and B is combined, so that the heat treatment process has the advantages that the heat treatment efficiency is greatly improved on the premise of not depending on precious alloy elements such as Cr and Ni; and the superfine bainite steel which is uniform in structure and excellent in comprehensive performance is successfully prepared.

The invention relates to a steel wire rod for a non-quenched and tempered fastener, a production method of the steel wire rod and the fastener, and the steel wire rod is characterized in that through component design, an element B is added on the basis of strengthening elements such as carbon, silicon and manganese, so that excellent hardenability and plasticity of steel are guaranteed; the tensile strength of the steel wire rod obtained through the production process of converter smelting, LF refining, bloom continuous casting, cogging, steel wire rod rolling and offline salt bath of the steel wire rod is 1050-1250 MPa, and the percentage reduction of area is 65-70%; the steel wire rod is subjected to drawing and cold heading to produce the fastener, thermal refining can be omitted, the technical requirements of the 12.9-grade fastener can be met, and the production cost and the carbon emission are effectively reduced.

The invention relates to a method for preparing a super-thick compact infiltrated layer through interface reactivation type cyclic nitridation, and aims to solve the problems that an infiltrated layer obtained through existing salt bath nitridation treatment is insufficient in thickness and poor in performance. The method for preparing the super-thick compact infiltrated layer comprises the following steps: 1, putting a preheated workpiece in a nitriding furnace into a molten salt bath medium, and carrying out salt bath nitriding treatment at the temperature of 380-650 DEG C; 2, carrying out layer removal treatment through stress-assisted surface subtractive machining to remove a surface compound layer of the workpiece; thirdly, the salt bath nitriding treatment and the layer removing treatment are repeated for multiple times; and 4, carrying out surface ultrasonic rolling post-treatment on the workpiece subjected to circulating salt bath nitriding. According to the method, a compound layer formed in the nitriding process is removed, the nitrogen atom diffusion driving force of subsequent nitriding treatment is enhanced, the nitrided layer subjected to circulating salt bath nitriding treatment has higher nitrogen concentration, the thicker nitrided layer is prepared, the depth and compactness of the nitrided layer of the metal workpiece can be remarkably improved, and the comprehensive performance of the nitrided layer is enhanced.

The invention relates to a non-quenched and tempered 10.9-grade high-strength cold heading steel wire rod with low cost and high structure stability and a preparation method. The wire rod comprises the following chemical components in percentage by weight: 0.03-0.05% of C, less than or equal to 0.10% of Si, 1.2-1.7% of Mn, 0.4-0.6% of Cr, 0-0.04% of Nb, 0.004-0.008% of B, more than or equal to 0.020% of Als, less than or equal to 0.040% of Alt, less than or equal to 0.015% of P, less than or equal to 0.010% of S and the balance of Fe and inevitable impurity elements. The cooling speed of the hot-rolled wire rod on the after-rolling air cooling roller way is precisely controlled, the structure of the hot-rolled wire rod is full-granular bainite, and the wire rod finished product has high strength and high plasticity and also has excellent low-temperature impact toughness; and the production process is simple, the production cost is greatly reduced compared with a high-cost production process adopting salt bath treatment / isothermal treatment, and large-scale and low-cost stable production can be realized.

The invention discloses a method for removing impurities in a glass strengthening salt bath, which comprises the following steps: preparing an additive from 20-60% by mass of SiO2, 10-40% by mass of Al2O3, 20-50% by mass of a first metal oxide and 0-30% by mass of other oxides, weighing the additive accounting for 1-2% of the mass of the glass strengthening salt to be removed, adding the additive into the glass strengthening salt to be removed, and reacting at 460-500 DEG C for 3-20 hours to obtain the impurities in the glass strengthening salt bath. The iron ions in the glass strengthening salt bath are removed. According to the method, Fe ions brought by the strengthening furnace and the sample holder in the salt bath can be effectively removed, so that the salt bath is recovered to be clean, and poor appearance caused by multiple concave and convex points is reduced. The problem that in the prior art, after salt bath pollution, a new salt bath material needs to be replaced is solved, and the production efficiency is improved; meanwhile, new salt bath materials are prevented from being input, and the production cost is reduced. And the additive can be quickly and conveniently taken out, so that the influence on the production efficiency is reduced.

The application relates to the technical field of bearing steel, in particular to a boronized bearing steel and a preparation method thereof. The boronized bearing steel comprises a base body and a boronized layer; the base body is 20CrNiMo steel and comprises the following components in percentage by weight: C 0.18-0.22wt%, Si 0.25-0.32wt%, Mn 0.75-0.83wt%, Cr 0.48-0.55wt%, Ni 0.50-0.70wt%, Mo 0.40-0.50wt%, V 0.18-0.21wt%, and the balance is Fe and inevitable impurities; the boronized layer is obtained through salt bath boronizing, the boronizing agent for the salt bath boronizing is mainly composed of Na2B4O7, Al and KCl, and the thickness of the boronized layer is 20-80 mu m. The application forms a boronized layer with a certain thickness on the surface of the base body through specific base body components and boronizing agents, and the surface hardness, wear resistance, strength and toughness of the bearing steel are significantly improved.

This invention relates to the field of salt bath quenching technology, specifically to a salt bath quenching furnace and quenching method. The salt bath quenching furnace includes a furnace body with a fixed plate on the furnace body. Below the fixed plate is a hanging basket assembly, which includes at least two annular support frames. The axis of each annular support frame extends vertically. Each annular support frame has the same shape and is composed of two circular wave rings. The interval between the two circular wave rings forms a circular wave slide for placing bearing steel balls. A toggle plate is correspondingly provided above each annular support frame. The fixed plate is also provided with a first driving mechanism and a second driving mechanism. The first driving mechanism can independently control the vertical movement of each annular support frame, thereby staggering the annular support frames vertically. The second driving mechanism can drive the toggle plate to rotate synchronously around the vertical axis, thereby causing the bearing steel balls to roll on the corresponding circular wave slide, improving the quenching quality of the bearing steel balls.

The invention relates to a method for producing a rolling element bearing component (1), wherein: the rolling element bearing component (1) is formed from a rolling element bearing steel of the type 100CrMnSi6-4 or 100Cr6; the rolling element bearing component (1) is heated to form an austenitic microstructure and subsequently quenched in a hot salt bath to a first temperature of between 170°C and 200°C, such that a pearlitic and / or ferritic microstructure is present at least in a core region (8) of the rolling element bearing component (1); thereafter, the rolling element bearing component (1) is heated to at least a second temperature in the temperature range from 220°C to 280°C and held for at least 7 hours, forming a predominantly bainitic microstructure at a surface (7) of the rolling element bearing component (1). The invention also relates to a rolling bearing component (1) and to a rolling bearing (2).

Embodiments of the present disclosure relate to a salt bath system for strengthening glass articles, the salt bath system including: a salt bath defining a first interior volume bounded by at least one sidewall; a salt bath composition including an alkali metal salt disposed within the first interior volume; a containment device defining a second interior volume bounded by at least one sidewall and including a regeneration medium disposed within the second interior volume; and a circulation device disposed proximate an inlet of the containment device, the circulation device operative to circulate the salt bath composition through the containment device. A method for regenerating molten salt is also disclosed.

The invention relates to the technical field of piston rod treatment, and discloses a QPQ piston rod corrosion-resistant treatment device which comprises a frame body, a nitriding salt bath is fixedly connected to the interior of the left side of the frame body, a top plate is fixedly connected to the top of the frame body, and a direction adjusting mechanism is arranged on the left side wall of the top plate; and the direction adjusting mechanism comprises a protection box, two first motors, two first guide rails and two joint blocks, the right side wall of the protection box is fixedly connected to the left side wall of the top plate, and the bottoms of the two first motors are fixedly connected to the front side and the rear side of the interior of the protection box. By arranging the direction adjusting mechanism, the problems that the piston rod or equipment is damaged and the corrosion resistance is reduced can be solved, the front first sliding block and the rear first sliding block synchronously move under driving of the corresponding belts, and therefore the uniformity and consistency of the surface of the piston rod are effectively improved, manual intervention is reduced, the processing time is shortened, and the processing efficiency is improved. And the risk of misoperation is reduced.

The invention discloses a cooling control system and method for salt bath quenching of bearing parts, and relates to the technical field of bearing heat treatment, and the cooling control system comprises a miniature simulation body which is arranged in a salt bath tank and comprises a sealing sleeve, a thermocouple temperature sensor and an electric heating element, and the thermocouple temperature sensor and the electric heating element are sealed in the sealing sleeve; the electric heating element is configured to be capable of actively heating the micro simulation body to a preset target temperature, immediately stopping heating and naturally cooling; and the thermocouple temperature sensor is configured to acquire temperature data of the miniature simulation body in a natural cooling process in real time. According to the cooling control system and method, the quenching intensity of salt bath quenching can be dynamically monitored in real time, a cooling characteristic curve is automatically generated through collected temperature data, a special control model is constructed by utilizing a self-learning algorithm, finally, the water supplementing amount is automatically and accurately adjusted according to the technological requirements, and the water supplementing efficiency is improved. And the cooling rate of the bearing part is stabilized in an ideal range.

1. The name of this design product: Salt bath constant temperature tank. 2. Purpose of this design product: Used to detect the physical parameters of various temperature components such as thermometers and thermostats, and provide a constant temperature source. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The invention relates to the field of screw drill machinery, and particularly discloses a method for improving temperature resistance and wear resistance of a cardan shaft of a screw drill, the friction part of the cardan shaft is treated by salt bath nitriding and salt bath oxidation processes, the salt bath nitriding treatment temperature is 550-620 DEG C, the salt bath oxidation treatment time is longer than 3 hours, the salt bath oxidation treatment temperature is 350-450 DEG C, and the salt bath oxidation treatment time is 0.5-1 hour; or a diamond-like carbon coating is sprayed through a plasma-assisted chemical vapor deposition process, the hardness of the coating is larger than 750 HV, the temperature resistance is larger than 300 DEG C, and the thickness of the coating is 0.03-0.05 mm. According to the method, the temperature resistance and wear resistance of the cardan shaft of the screw drill can be improved, and the requirement for 300 DEG C deep well drilling can be met.

The application provides a fixing device for a salt bath experiment, which comprises a fixing frame, a first fixing assembly and a second fixing assembly, wherein the fixing frame comprises a lower frame body and a top plate, the lower frame body is provided with a containing portion and a first opening, the first opening is located at the top of the lower frame body, the first opening is communicated with the containing portion, the top plate is detachably arranged on the lower frame body and located at the first opening; the first fixing assembly is arranged on the lower frame body and extends along the height direction of the lower frame body, the first fixing assembly can move in the length direction relative to the lower frame body, and the first fixing assembly can fix a plate; the second fixing assembly is arranged on the top plate and extends along the length direction of the lower frame body, the second fixing assembly can move in the height direction relative to the lower frame body, and the second fixing assembly can fix the plate. Through the technical scheme, the problem that the plate is prone to deformation in the salt bath experiment in the prior art can be solved.

The utility model relates to the technical field of austenite-bainite rolling ball production, and provides an automatic isothermal salt bath heat treatment device for austenite-bainite rolling ball production, which comprises a tank body, a filter plate, a stirring paddle, two lifting mechanisms and a stirring mechanism, the filter plate is arranged in the tank body in a sliding manner, the stirring paddle is arranged in the tank body, the two lifting mechanisms are arranged on the tank body, and the stirring mechanism is arranged on the tank body. The lifting mechanism is arranged in the tank body and is used for driving the filter plate to lift and move, the stirring mechanism is arranged in the tank body and is used for stirring the austempered rolled balls and a salt bath medium, and the lifting mechanism comprises a stretching rope, a winding assembly and a supporting assembly. The discharging mode is time-consuming and labor-consuming, and the discharging efficiency of the austenite-bainite rolling balls is reduced.

The present invention belongs to the technical field of salt bath quenching treatment, and specifically discloses an ADI material heat treatment preparation device and method thereof, comprising a channel-type dual-track transfer mechanism, a heat-insulating transfer mechanism, a dual-mode drive mechanism, a heating furnace, and a salt bath tank. The channel-type dual-track transfer mechanism is provided at both ends of the heat-insulating transfer mechanism, and the heating furnace and the salt bath tank are connected through the channel-type dual-track transfer mechanism and the heat-insulating transfer mechanism. The present invention also utilizes a drive motor that drives the transfer vehicle assembly to slide, automatically controlling the opening of the heat-insulating curtain while the transfer vehicle assembly slides, thereby achieving the technical effect of automatically opening the heat-insulating curtain when the transfer vehicle assembly moves and automatically closing when the transfer vehicle assembly is stationary.

The invention is a color capsule suitable for use in food products, comprising a primary emulsion emulsified in a biopolymer-based and gel-form secondary emulsion, and an anthocyanin extract emulsified in the primary emulsion. The invention also describes a method for the production of the color capsules of the invention, comprising the process steps of obtaining an anthocyanin extract from plant raw materials (a), emulsifying the anthocyanin extract in a primary emulsion (b), emulsifying the primary emulsion in a biopolymer-based secondary emulsion in order to obtain a biphasic emulsion (c), and spraying the biphasic emulsion into a salt bath using the electrospraying technique in order to form biphasic emulsion-based gel-form capsules (d).

The invention provides a ceramic precursor and a preparation method thereof, and relates to the technical field of ceramic materials.The preparation method comprises the steps that 1, a system containing metal lithium and a first organic solvent is placed in an ice salt bath, then dimethyl phenyl chlorosilane and methyl phenyl dichlorosilane are dropwise added into the system in sequence for a reaction, and a reaction product is obtained; adding triphenyl pentamethyl trisilane to obtain triphenyl pentamethyl trisilane; (2) triphenylpentamethyltrisilane and a chlorinating agent are added into a second organic solvent for a substitution reaction, and trichloropentamethyltrisilane is obtained; (3) adding trichloropentamethylpropyl silane into a second organic solvent, uniformly mixing, and then adding metal sodium to carry out coupling reaction, so as to obtain hyperbranched polysilane; and cracking the hyperbranched polysilane to obtain a ceramic precursor. The ceramic precursor provided by the scheme has a hyperbranched structure, is narrow in molecular weight distribution and excellent in solubility, does not need complex or expensive equipment, and is higher in yield.

The utility model relates to the technical field of cast iron pan production and processing, in particular to a cast iron pan hanging device for salt bath nitriding treatment, which comprises a rotating mechanism and an expanded surface stirring structure, the expanded surface stirring structure comprises a plurality of support rods, and the support rods are equidistantly distributed on the outer side of the rotating mechanism. The two supporting frames are pulled to be close to each other, the two supporting frames penetrate through the two handles of the cast iron pan blank correspondingly, the two supporting frames are driven to be away from each other through retraction of the springs on the two sides, then the two handles of the cast iron pan blank are supported by the two supporting frames, and the two handles of the cast iron pan blank are prevented from falling off through the front ends of the two L-shaped supporting frames; a cast iron pan blank is placed in the radial direction through the two supporting frames, so that the cast iron pan blank plays a role in stirring in the rotating process, the contact between the cast iron pan blank and nitrogen atoms in a salt bath is increased, the salt bath is stirred through stirring blades, the salt bath away from the pan hanging device flows inwards, the uniformity of the nitrogen atoms in the salt bath is improved, and resources are fully utilized.

The present invention discloses an indirect electric heating safety interlock control method and device, which relates to the technical field of heating equipment. The method includes: conducting a heating analysis in combination with the application scenario of the heat-conducting oil furnace to determine the salt bath temperature threshold, performing an optimization of the ratio of the multi-component mixed salt bath to determine the optimal salt bath ratio scheme; charging the equipment of the heat-conducting oil furnace with salt according to the optimal salt bath ratio scheme to obtain the target heat-conducting oil furnace; performing sensing monitoring on predetermined components to obtain a real-time monitoring data set; judging the real-time monitoring data set according to a predetermined warning threshold, and based on the judgment result, performing safety control on the target heat-conducting oil furnace according to a predetermined interlock control scheme. The technical problem of low safety and stability in the operation process of the existing heat-conducting oil furnace is solved. Through real-time monitoring and intelligent interlock control, timely warning and automatic safety regulation are realized, and the technical effect of improving the safety and stability of the operation of the heat-conducting oil furnace is achieved.

Methods for regenerating a salt bath composition include heating the salt bath composition to an ion exchange temperature to form a molten salt bath. The methods may further include contacting at least a portion of an ion-exchangeable article that includes lithium oxide (Li2O) with the molten salt bath. Lithium cations may diffuse from the ion-exchangeable article and into the molten salt bath. Additionally, the methods may include adding a first phosphate salt to the molten salt bath. A lithium phosphate salt that includes at least a portion of the lithium cations may be formed and precipitate from the molten salt bath. Furthermore, the methods may include adding a multivalent salt that includes a multivalent metal cation to the molten salt bath. A second phosphate salt that includes the multivalent metal cation may be formed and precipitate from the molten salt bath.

The utility model belongs to salt bath furnace technical field, and disclose a kind of salt bath furnace smoke filtering protection device, including furnace body and the heating cavity of construction in the lower part of furnace body, the front side of heating cavity is inserted with multiple exhaust pipes side by side, and the front end of multiple exhaust pipes is equipped with the cooling filter box that cooling liquid is deposited, and the bottom of cooling filter box is equipped with heat conduction plate nested installation, the top of heat conduction plate is connected with multiple heat conduction sheet one side by side, and the surface of heat conduction sheet one is evenly equipped with multiple heat conduction holes, the bottom of heat conduction plate is connected with multiple heat conduction sheet two side by side, and the surface of heat conduction sheet two is evenly equipped with multiple heat dissipation holes, and the bottom edge of heat conduction plate is symmetrically connected with two connecting plates;Through the above scheme, the problem that although the existing device can efficiently complete the filtration of smoke, but the filtered smoke still has high temperature, leading to the temperature of the device near too high, affecting the comfort of nearby staff.

The invention relates to the technical field of metal stators, and provides a carbonitriding process of a metal stator for a screw drill, which comprises the following steps: preheating the metal stator, and then carrying out salt bath carbonitriding and salt bath oxidation treatment to obtain the metal stator for the screw drill; during salt bath carbonitriding, a carbonitriding agent comprises the following components in parts by weight: 24 parts of a composite carbon material, 10-15 parts of ammonium chloride, 4-8 parts of urea, 3-6 parts of yttrium oxide, 4-8 parts of potassium ferrocyanide and 10-15 parts of potassium chloride; raw materials of the composite carbon material comprise charcoal, carbon nanotubes and light calcium carbonate. According to the technical scheme, the problem that a metal stator is poor in wear resistance in the prior art is solved.

The invention particularly discloses corrosion-resistant free-cutting steel based on manganese sulfide for promoting graphitization and a manufacturing method of the corrosion-resistant free-cutting steel. The corrosion-resistant free-cutting steel comprises the following chemical components in percentage by mass: 0.75%-1.35% of C, 1.85%-2.35% of Si, 0.10%-0.30% of Mn, 0.01%-0.04% of P, 0.010%-0.030% of S, 0.001%-0.003% of B, less than or equal to 0.002% of T [O], less than or equal to 0.005% of N, less than or equal to 0.008% of Al and the balance of Fe and inevitable impurities. The manufacturing method comprises the steps of converter smelting, LF refining, RH refining, continuous casting, hot rolling, constant-temperature salt bath treatment and tempering. Dispersion precipitation of the submicron MnS phase in the high-carbon high-silicon steel wire rod is achieved, precipitation and graphitization transformation of Fe3C in the tempering process are effectively promoted, and the corrosion resistance and the cutting performance of the high-carbon high-silicon steel wire rod tend to be excellent at the same time.