Rotating shuttle high-performance alloy material based on powder deoxidation purification and MIM technology and preparation technology of rotating shuttle high-performance alloy material

Abstract

The invention belongs to the technical field of sewing machine manufacturing, and relates to a rotating shuttle high-performance alloy material based on powder deoxidation purification and MIM technologies and a preparation process thereof. The high-performance alloy material for the rotating shuttle comprises main elements such as iron, nickel, chromium and molybdenum and deoxidizing elements such as aluminum and titanium, the oxygen content is reduced through a powder deoxidizing and purifying technology, and near-net forming of a complex shape is achieved in combination with an MIM technology (mixing, injection molding, degreasing and sintering). After the process is integrated and optimized, the material has excellent strength, hardness, wear resistance and corrosion resistance, can adapt to the working conditions of high-speed rotation and frequent friction of the rotating shuttle, improves the production efficiency and the product consistency, promotes the technical upgrade of the sewing machine industry, and has important application value.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of sewing machine manufacturing, in particular to a high-performance alloy material for a rotating shuttle based on powder deoxidization and purification and MIM technology and a preparation process thereof. BACKGROUND

[0002] In the field of sewing machine manufacturing, the rotating shuttle as a key component directly affects the sewing quality and efficiency. With the development of the textile industry towards high speed and precision, the traditional rotating shuttle material gradually cannot meet the requirements in terms of wear resistance, strength, corrosion resistance and the like. The traditional manufacturing process has limitations in the forming precision of complex shapes, production efficiency and the improvement of material performance, and cannot adapt to the use requirements of the rotating shuttle under harsh working conditions such as high-speed operation and frequent friction. Therefore, developing high-performance alloy materials and advanced preparation processes has become an inevitable trend in the industry, and the powder deoxidization and purification technology can reduce the oxygen content of metal powder and reduce the influence of impurities, and the MIM technology can realize near-net forming of complex shapes, which provides a feasible path for the preparation of high-performance materials for the rotating shuttle.

[0003] Therefore, a high-performance alloy material for a rotating shuttle based on powder deoxidization and purification and MIM technology and a preparation process thereof are provided. SUMMARY

[0004] The application provides a high-performance alloy material for a rotating shuttle based on powder deoxidization and purification and MIM technology and a preparation process thereof to solve the problems in the background art.

[0005] The specific technical scheme is as follows:

[0006] A high-performance alloy material for a rotating shuttle based on powder deoxidization and purification and MIM technology, the high-performance alloy material for the rotating shuttle comprises the following components in mass percentage: iron 60-80%, nickel 5-15%, chromium 8-15%, molybdenum 2-5%, aluminum 0.5-2%, titanium 0.3-1.5%, and the rest is inevitable impurities; the oxygen content of the high-performance alloy material for the rotating shuttle is ≤50ppm, the hardness is ≥HRC55, and the impact toughness is ≥25J / cm 2 .

[0007] Through specific alloy component design, the main alloy elements such as iron, nickel, chromium and molybdenum synergistically act to improve the strength, hardness, wear resistance and corrosion resistance of the material; aluminum and titanium as deoxidizing elements cooperate with low oxygen content control to reduce the adverse effects of impurities on performance, while ensuring that the material has high hardness and impact toughness, so that the alloy material can adapt to the harsh working conditions of high-speed operation and frequent friction of the rotating shuttle.

[0008] The high-performance alloy material for the shuttle based on powder deoxidization and MIM technology, wherein the mass percentage of the components is: iron 65-75%, nickel 8-12%, chromium 10-13%, molybdenum 3-4%, aluminum 0.8-1.5%, titanium 0.5-1.2%.

[0009] By optimizing the mass percentage range of each alloying element, the synergistic effect between each element is further balanced, so that the strength, hardness, wear resistance, corrosion resistance and other properties of the material are more suitable for the use requirements of the shuttle, and the stability and balance of the performance are improved.

[0010] The high-performance alloy material for the shuttle based on powder deoxidization and MIM technology, wherein in the microstructure of the high-performance alloy material for the shuttle, the carbides are uniformly distributed, and the average grain size is ≤5 μm.

[0011] The uniform distribution of carbides in the microstructure and the small grain size can reduce the unevenness of the internal performance of the material, reduce stress concentration, thereby improving the overall mechanical properties of the material, enhancing the wear resistance and impact resistance, and reducing the failure risk during use.

[0012] The application also provides a preparation process of the high-performance alloy material for the shuttle based on powder deoxidization and MIM technology, comprising the following steps:

[0013] (1) Powder deoxidization: the metal mixed powder is subjected to deoxidization treatment by adopting a hydrogen reduction-vacuum deoxidization combined process to obtain low-oxygen metal powder;

[0014] (2) Feeding preparation: the low-oxygen metal powder obtained in step (1) is mixed with a binder, and uniform metal powder feeding is obtained through mixing;

[0015] (3) Injection molding: the metal powder feeding is injected into a shuttle mold to be molded under specific temperature and pressure to obtain a shuttle green body;

[0016] (4) Debinding treatment: the shuttle green body is subjected to debinding to remove the binder;

[0017] (5) Sintering: the debound shuttle body is subjected to sintering in a protective atmosphere to obtain a finished shuttle product.

[0018] The powder deoxidization and purification technology and the MIM technology are integrated, the powder deoxidization and purification ensures the purity of the metal powder, and provides high-quality raw materials for subsequent molding; the synergistic effect of each link of the MIM technology realizes accurate molding of the complex shape of the shuttle, reduces subsequent processing procedures, improves production efficiency, and at the same time ensures the consistency and stability of the product performance.

[0019] The preparation process of the high-performance alloy material of the rotating hook based on powder deoxidization and MIM technology, wherein in step (1), the process parameters of hydrogen reduction are: reduction temperature 800-1000℃, hydrogen flow rate 0.5-2L / min, and holding time 2-4h; the process parameters of vacuum deoxidization are: vacuum degree ≤1×10 -3 Pa, deoxidization temperature 1000-1200℃, and holding time 1-3h.

[0020] The hydrogen reduction-vacuum deoxidization combined process can effectively reduce metal oxides, further remove residual oxygen and gas impurities, synergistically improve the deoxidization effect, reduce the oxygen content in the metal powder, and reduce the negative impact of impurities on the material performance, thereby laying a foundation for subsequent MIM forming and the performance of the final product.

[0021] The preparation process of the high-performance alloy material of the rotating hook based on powder deoxidization and MIM technology, wherein in step (2), the binder includes paraffin-based binder and polyolefin with a mass ratio of 3:1-5:1, and the mass ratio of the metal powder to the binder is 85:15-90:10, the mixing temperature is 150-180℃, and the mixing time is 1-3h.

[0022] The use of reasonable binder formulation and mixing process makes the metal powder feed have good flowability and formability, facilitates the filling of the mold cavity during injection molding, ensures the shape integrity and dimensional accuracy of the rotating hook green body, and reduces the forming defects.

[0023] The preparation process of the high-performance alloy material of the rotating hook based on powder deoxidization and MIM technology, wherein in step (3), the temperature of injection molding is 160-200℃, the injection pressure is 50-150MPa, the holding time is 5-30s, and the mold temperature is 40-60℃.

[0024] Through the optimization of the injection molding parameters (temperature, pressure, holding time, etc.), the metal powder feed can be ensured to fully fill the mold, accurately replicate the shape of the mold, improve the dimensional accuracy and forming quality of the rotating hook green body, and reduce the subsequent machining allowance.

[0025] The preparation process of the high-performance alloy material of the rotating hook based on powder deoxidization and MIM technology, wherein in step (4), the degreasing treatment adopts a combination of solvent degreasing and thermal degreasing, wherein the solvent degreasing temperature is 40-60℃, the time is 4-8h; the thermal degreasing temperature is 200-500℃, the heating rate is 1-5℃ / min, and the holding time is 2-6h.

[0026] The solvent degreasing and the thermal degreasing are combined, the solvent degreasing can remove part of the binder, the thermal degreasing further removes the residual binder, the step-by-step degreasing reduces the stress and deformation generated in the binder removal process, ensures the shape stability of the blank, and reduces defects.

[0027] The preparation process of the high-performance alloy material of the rotating hook based on powder deoxidization and MIM technology, wherein in step (5), the sintering is carried out under an argon or nitrogen protective atmosphere, the sintering temperature is 1200-1400℃, the heating rate is 5-10℃ / min, the holding time is 2-4h, and the cooling rate is 10-20℃ / min.

[0028] The specific sintering parameters (protective atmosphere, temperature, heating and cooling rate, etc.) can prevent the material from being oxidized during sintering, promote the diffusion and densification between powder particles, improve the density of the material, enhance the mechanical properties (such as strength and hardness), and reduce defects such as pores.

[0029] The preparation process of the high-performance alloy material of the rotating hook based on powder deoxidization and MIM technology, wherein in step (1), the particle size of the metal mixed powder is 5-20μm, the purity of the iron, nickel, chromium and molybdenum powders is all ≥99.5%, and the purity of the aluminum and titanium powders is all ≥99.0%.

[0030] By controlling the particle size and purity of the metal mixed powder, the fine particle size powder is beneficial to the densification in the subsequent sintering process, and the high-purity powder reduces the introduction of impurities, both of which improve the mixing uniformity and forming performance of the powder, and provide protection for the excellent performance of the final product.

[0031] The preparation process of the high-performance alloy material of the rotating hook based on powder deoxidization and MIM technology, wherein the wear rate of the high-performance alloy material of the rotating hook is ≤5×10 -6 mm 3 / (N·m) after detection, and the corrosion resistance meets the requirement of no obvious rusting after being immersed in a 3.5% sodium chloride solution for 240h.

[0032] Through the component and structure design of the alloy material, the wear resistance of the material is improved, the loss of the rotating hook in the high-speed friction process is reduced, the corrosion resistance is enhanced, the material remains stable in performance in the possible corrosive environment, and the service life is prolonged.

[0033] The preparation process of the high-performance alloy material of the rotating hook based on powder deoxidization and MIM technology, wherein after the powder deoxidization and purification in step (1), the metal powder is further subjected to a screening treatment, and the screening mesh size is 200-400 meshes to remove agglomerated particles.

[0034] Through the screening treatment after the powder deoxidization purification, the agglomerated particles are removed, the dispersibility and uniformity of the metal powder are ensured, the uniform mixing of the powder and the binder in the subsequent mixing process is facilitated, the feed quality is improved, the defects in the forming and sintering processes are reduced, and the product consistency is improved.

[0035] The present application has the following beneficial effects:

[0036] 1. Material performance: Through powder deoxidization purification to reduce impurities, cooperate with alloy element design, make the strength, hardness, wear resistance, corrosion resistance and toughness of the material get comprehensive improvement, can adapt to the adverse working conditions of high-speed operation and frequent friction of the rotating hook, reduce the failure risk such as wear and tear and fracture in use, prolong the service life.

[0037] 2. Production and manufacturing: MIM technology realizes near-net forming of rotating hook complex shape, reduces subsequent machining process, improves production efficiency; At the same time, ensure the product size precision and consistency, improve the stability of batch production, reduce the production cost.

[0038] 3. Industry application: Promote the technical upgrading of sewing machine manufacturing industry, provide high-performance core components for high-speed and precision sewing machine, meet the demand of textile industry for equipment performance improvement. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 The flow chart of the preparation process of the rotating hook high-performance alloy material based on powder deoxidization purification and MIM technology provided by the embodiment of the present application. DETAILED DESCRIPTION

[0040] The technical scheme of the present application will be further described below in combination with the specific embodiments. Figure 1 The technical scheme of the present application will be further described below in combination with the specific embodiments.

[0041] Among them, the drawings are only used for example explanation, and the representation is only a schematic diagram, not a real object diagram, and cannot be understood as a limitation of the present application; in order to better illustrate the embodiment of the present application, some components of the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some known structures and their descriptions in the drawings can be omitted.

[0042] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration and cannot be understood as a limitation on the present application, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0043] In the description of the present application, unless otherwise explicitly specified and limited, if the term "connection" and the like indicating the connection relationship between components appears, the term should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two components or the interaction relationship between two components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] Embodiment 1

[0045] High-performance alloy material composition of rotating hook

[0046] Iron 70%, nickel 10%, chromium 12%, molybdenum 3%, aluminum 1%, titanium 0.8%, and the rest is inevitable impurities.

[0047] Preparation process

[0048] 1. Powder deoxidization purification: hydrogen reduction-vacuum deoxidization combined process, hydrogen reduction temperature 900℃, hydrogen flow rate 1.2L / min, holding time 3h; vacuum deoxidization vacuum degree 5×10 -4 Pa, temperature 1100℃, holding time 2h.

[0049] 2. Feed preparation: metal powder and binder (paraffin-based binder and polyolefin mass ratio 4:1) are mixed in a mass ratio of 88:12, and mixed at 165℃ for 2h.

[0050] 3. Injection molding: temperature 180℃, pressure 100MPa, holding time 15s, mold temperature 50℃.

[0051] 4. Debinding treatment: solvent debinding temperature 50℃, time 6h; thermal debinding temperature 350℃, heating rate 3℃ / min, holding time 4h.

[0052] 5. Sintering: argon protection, temperature 1300℃, heating rate 7℃ / min, holding time 3h, cooling rate 15℃ / min.

[0053] Working principle

[0054] Iron, nickel, chromium and molybdenum are used as main alloying elements to build the basic framework of the material through synergistic effect, thereby improving the overall strength and wear resistance; aluminum and titanium are combined with oxygen during the deoxidization process to reduce the impurity content. Hydrogen reduction can reduce metal oxides to elemental metals, and vacuum deoxidization can further remove residual oxygen and gas impurities to ensure the purity of the powder. The synergy of each link in MIM ensures uniform mixing of the feedstock, accurate replication of the shuttle shape during injection molding, removal of the binder during debinding, densification of the material during sintering, and finally the formation of an alloy material with performance suitable for the working conditions of the shuttle.

[0055] Experimental data

[0056] The oxygen content test was 35ppm; the hardness test result was HRC58; the impact toughness test showed 30J / cm 2 ; In the simulation of high-speed running test of shuttle, the surface wear was slight after 500 hours of continuous work.

[0057] Technical effects

[0058] The alloy material has high strength and hardness, and can withstand the mechanical stress during high-speed running of the shuttle; good impact toughness can reduce the risk of fracture under frequent impact; low oxygen content reduces the adverse effects of impurities on performance, and the overall performance meets the use requirements of the shuttle in high-speed and frictional working conditions.

[0059] Example 2

[0060] Composition of high-performance alloy material for shuttle

[0061] Iron 68%, nickel 12%, chromium 10%, molybdenum 4%, aluminum 1.5%, titanium 1%, and the rest are unavoidable impurities.

[0062] Preparation process

[0063] 1. Powder deoxidization and purification: vacuum deoxidization combined with the addition of deoxidizing agent (silicon powder), vacuum degree 8x10 -4 Pa, temperature 1150℃, holding time 2.5h, silicon powder addition amount 0.3% of the total mass of the powder.

[0064] 2. Preparation of feedstock: mix metal powder and binder (paraffin-based binder and polyolefin mass ratio 5:1) at a mass ratio of 89:11, and mix at 170℃ for 1.5h.

[0065] 3. Injection molding: temperature 190℃, pressure 120MPa, holding time 20s, mold temperature 55℃.

[0066] 4. Degreasing treatment: solvent degreasing temperature 55℃, time 5h; thermal degreasing temperature 400℃, heating rate 4℃ / min, holding time 3h.

[0067] 5. Sintering: nitrogen protection, temperature 1350℃, heating rate 8℃ / min, holding time 2.5h, cooling rate 18℃ / min.

[0068] Working principle

[0069] The adjustment of nickel and chromium content enhances the corrosion resistance of the material, and the increase of molybdenum further improves the wear resistance. In a vacuum environment, silicon powder reacts with residual oxygen to form stable compounds, which, combined with vacuum removal, strengthens the deoxidation effect. The optimization of the proportion of the binder and the mixing parameters improves the flowability of the feedstock, which is beneficial for the molding of complex shapes; higher sintering temperature promotes powder particle diffusion and improves material density.

[0070] Experimental data

[0071] The oxygen content is 28ppm; after soaking in a 3.5% sodium chloride solution for 240h, there is no obvious rust on the surface; the degree of wear is lower than that of traditional rotary hook materials after friction and wear testing.

[0072] Technical effects

[0073] The corrosion resistance of the material is significantly improved, which can adapt to the humid or slightly corrosive environment that may be contacted; the enhancement of wear resistance reduces the wear of the rotary hook in long-term friction, prolonging the service life; the molding precision is high, meeting the size requirements of the complex structure of the rotary hook.

[0074] Example 3

[0075] Composition of high-performance alloy material for rotary hook

[0076] Iron 75%, nickel 8%, chromium 13%, molybdenum 3%, aluminum 0.8%, titanium 0.5%, and the rest is unavoidable impurities.

[0077] Preparation process

[0078] 1. Powder deoxidization and purification: hydrogen reduction method, reduction temperature 950℃, hydrogen flow rate 1.5L / min, holding time 3.5h.

[0079] 2. Preparation of feedstock: mix metal powder and binder (paraffin-based binder and polyolefin mass ratio 3:1) at a mass ratio of 87:13, and mix at 160℃ for 2.5h.

[0080] 3. Injection molding: temperature 170℃, pressure 80MPa, holding time 10s, mold temperature 45℃.

[0081] 4. Degreasing treatment: solvent degreasing temperature 45℃, time 7h; thermal degreasing temperature 300℃, heating rate 2℃ / min, holding time 5h.

[0082] 5. Sintering: argon protection, temperature 1250℃, heating rate 6℃ / min, holding time 3.5h, cooling rate 12℃ / min.

[0083] Working principle

[0084] High proportion of iron and chromium form stable matrix structure, chromium improves corrosion resistance. Hydrogen reduction efficiently reduces metal oxides at high temperature, reducing the oxygen content of the powder. Lower injection pressure matches the temperature, reducing stress during the flow of the feed material and reducing the risk of green body deformation; slow thermal degreasing rate reduces stress concentration during binder removal, ensuring the integrity of the green body.

[0085] Experimental data

[0086] Oxygen content test is 42ppm; material density test reaches 98%; after multiple assembly tests, the precision of the rotating hook and the sewing machine is high, and there is no jamming phenomenon.

[0087] Technical effects

[0088] High material density, few internal pores, uniform and stable mechanical properties; high dimensional accuracy of the formed rotating hook, good compatibility with the sewing machine, reducing the adjustment process during assembly; good corrosion resistance ensures stable performance in long-term use.

[0089] Example 4

[0090] Rotating hook high-performance alloy material composition

[0091] Iron 65%, nickel 15%, chromium 11%, molybdenum 5%, aluminum 2%, titanium 1.2%, the rest is unavoidable impurities.

[0092] Preparation process

[0093] 1. Powder deoxidization and purification: hydrogen reduction-vacuum deoxidization combined process, hydrogen reduction temperature 850℃, flow rate 1L / min, holding time 2.5h; vacuum deoxidization vacuum degree 5x10 -4 Pa, temperature 1050℃, holding time 1.5h.

[0094] 2. Feed preparation: mix metal powder and binder (paraffin-based binder and polyolefin mass ratio 4:1) at a mass ratio of 90:10, and mix at 175℃ for 1h.

[0095] 3. Injection molding: temperature 200℃, pressure 150MPa, holding time 25s, mold temperature 60℃.

[0096] 4. Degreasing treatment: solvent degreasing temperature 60℃, time 4h; thermal degreasing temperature 500℃, heating rate 5℃ / min, holding time 2h.

[0097] 5. Sintering: nitrogen protection, temperature 1400℃, heating rate 10℃ / min, holding time 2h, cooling rate 20℃ / min.

[0098] Working principle

[0099] High nickel content improves the toughness and fatigue resistance of the material, and molybdenum and chromium enhance wear resistance and corrosion resistance. The combination of hydrogen reduction and vacuum deoxidization achieves deep deoxidization, ensuring powder purity. High proportion of metal powder combined with high injection pressure of binder makes the feed fully fill the complex cavity of the mold, improving the integrity of the formed details; high temperature rapid sintering promotes particle fusion, shortens the production cycle.

[0100] Experimental data

[0101] Oxygen content test is 25ppm; impact toughness test results are better than traditional bobbin materials; after 1000 hours of continuous operation after high-speed running test (simulating the highest speed of sewing machine), the bobbin has no obvious wear and deformation.

[0102] Technical effects

[0103] The material has excellent fatigue resistance and can withstand the repeated stress generated by long-term high-speed operation of the bobbin, reducing the risk of fatigue fracture; the forming process can accurately replicate the complex structure details of the bobbin, meeting the use requirements of precision parts; the overall performance adapts to the harsh working conditions of high-speed sewing machines.

[0104] Example 5

[0105] Composition of high-performance alloy material for bobbin

[0106] Iron 72%, nickel 8%, chromium 13%, molybdenum 3%, aluminum 0.5%, titanium 0.3%, and the rest is unavoidable impurities.

[0107] Preparation process

[0108] 1. Powder deoxidization and purification: adopt the combination process of adding deoxidizer (titanium powder) and vacuum deoxidization, titanium powder addition amount is 0.5% of total powder mass, vacuum degree is 8x10 -4 Pa, temperature 1100℃, holding time 2h.

[0109] 2. Feed preparation: mix metal powder and binder (paraffin-based binder and polyolefin mass ratio 3:1) according to 86:14 mass ratio, mix at 155℃ for 3h.

[0110] 3. Injection molding: temperature 160℃, pressure 50MPa, holding time 30s, mold temperature 40℃.

[0111] 4. Degreasing treatment: solvent degreasing temperature 40℃, time 8h; thermal degreasing temperature 200℃, heating rate 1℃ / min, holding time 6h.

[0112] 5. Sintering: argon protection, temperature 1200℃, heating rate 5℃ / min, holding time 4h, cooling rate 10℃ / min.

[0113] Working principle

[0114] Titanium as a deoxidizer preferentially binds with oxygen, and cooperates with the high-efficiency removal of oxygen impurities in a vacuum environment. Meanwhile, titanium and other elements synergistically strengthen the matrix. Lower injection pressure and slow holding time are suitable for the molding of thin-walled complex structures, reducing molding defects; long-time low-temperature sintering is beneficial to uniform grain growth, improving material toughness.

[0115] Experimental data

[0116] The oxygen content detection is 45ppm; the material hardness test results meet the use requirements; after the corrosion test (exposed to a humid environment for 30 days), there is no obvious rust on the surface.

[0117] Technical effects

[0118] The material toughness is good, and it is not easy to break when impacted or vibrated; the molding process has strong adaptability to thin-walled complex structures, and can produce shuttle parts with fine structures; it has certain moisture resistance and is suitable for use in humid environments such as textile workshops.

[0119] In summary, the high-performance alloy material for a shuttle based on powder deoxidization purification and MIM technology and its preparation process provided in the embodiment realize the preparation of a high-performance alloy for a shuttle through the organic integration of powder deoxidization purification and MIM technology, combined with alloy material design:

[0120] 1. The powder deoxidization purification technology reduces the oxygen content and impurities in the metal powder through hydrogen reduction, vacuum deoxidization or the addition of deoxidizers, etc., providing high-purity powder raw materials for subsequent processes and reducing the negative impact of impurities on material performance.

[0121] 2. The MIM technology mixes metal powder and binder into feedstock with good fluidity through mixing, precisely replicates the complex shape of the shuttle through injection molding, and then realizes material densification through debinding to remove the binder and sintering, finally obtaining a high-performance shuttle product.

[0122] 3. In the alloy material design, main elements such as iron, nickel, chromium and molybdenum synergistically improve strength, hardness, wear resistance and corrosion resistance, and deoxidizing elements such as aluminum and titanium assist deoxidization during preparation. Through element proportion adjustment, the microstructure is optimized to adapt to the working conditions of the shuttle.

[0123] Each technical link cooperates to realize overall control from raw material purity, forming precision to material performance, and to ensure that the final product meets the use requirements.

[0124] Method of use

[0125] The prepared rotating hook is a key component of a sewing machine, is installed at a corresponding position of the sewing machine, and is used for forming stitches in cooperation with a needle and thread during a sewing process. The rotating hook is adapted to a high-speed and precise sewing machine, and is used in the production of the garment and home textile industries to realize continuous sewing operation with high-speed operation of the sewing machine. With excellent wear resistance and strength, the rotating hook can maintain stable performance in long-term and high-frequency use, reduce downtime maintenance caused by rotating hook failure, and ensure efficient sewing production.

[0126] The above are only the preferred embodiments of the present application, and do not limit the implementation and protection scope of the present application. For those skilled in the art, it should be realized that any equivalent replacement and obvious change made by applying the content of the present application should be included in the protection scope of the present application.

Claims

1. A high performance alloy material based on powder deoxidation purification and MIM technology, characterized in that, The high-performance alloy material of the rotating hook comprises the following components in mass percentage: iron 60-80%, nickel 5-15%, chromium 8-15%, molybdenum 2-5%, aluminum 0.5-2%, titanium 0.3-1.5%, and the rest is inevitable impurities; the oxygen content of the high-performance alloy material of the rotating hook is ≤50ppm, the hardness is ≥HRC55, and the impact toughness is ≥25J / cm 2 .

2. The high performance alloy material based on powder deoxidation purification and MIM technology according to claim 1, characterized in that, The mass percentage of the components is: iron 65-75%, nickel 8-12%, chromium 10-13%, molybdenum 3-4%, aluminum 0.8-1.5%, titanium 0.5-1.2%.

3. The high performance alloy material based on powder deoxidation purification and MIM technology according to claim 1, characterized in that, In the microstructure of the high-performance alloy material of the rotating hook, the carbides are uniformly distributed, and the average grain size is ≤5 μm.

4. A process for preparing a high-performance alloy material based on powder deoxidation purification and MIM technology, characterized in that, The method comprises the following steps: (1) powder deoxidization purification: the metal mixed powder is subjected to deoxidization treatment by adopting a hydrogen reduction-vacuum deoxidization combined process to obtain low-oxygen metal powder; (2) feed preparation: the low-oxygen metal powder obtained in step (1) is mixed with a binder to obtain uniform metal powder feed through mixing; (3) injection molding: the metal powder feed is injected into a rotating hook mold to be molded under specific temperature and pressure to obtain a rotating hook green body; (4) debinding treatment: the rotating hook green body is subjected to debinding to remove the binder; (5) sintering: the debound rotating hook body is subjected to sintering under a protective atmosphere to obtain a rotating hook finished product.

5. The process for preparing high performance alloy material based on powder deoxidation purifying and MIM technology according to claim 4, characterized in that, In step (1), the process parameters of the hydrogen reduction are: reduction temperature 800-1000℃, hydrogen flow rate 0.5-2L / min, and holding time 2-4h; and the process parameters of the vacuum deoxidization are: vacuum degree ≤1×10 -3 Pa, deoxidization temperature 1000-1200℃, and holding time 1-3h.

6. The process for preparing high performance alloy material for rotating hook based on powder deoxidation degassing and MIM technology according to claim 4, characterized in that, In step (2), the binder comprises paraffin-based binder and polyolefin in a mass ratio of 3:1-5:1, the mass ratio of the metal powder to the binder is 85:15-90:10, the mixing temperature is 150-180℃, and the mixing time is 1-3h.

7. The process for preparing high performance alloy material for rotating hook based on powder deoxidation degassing and MIM technology according to claim 4, characterized in that, In step (3), the temperature of the injection molding is 160-200℃, the injection pressure is 50-150MPa, the pressure maintaining time is 5-30s, and the mold temperature is 40-60℃.

8. The process for preparing high performance alloy material for rotating hook based on powder deoxidation degassing and MIM technology according to claim 4, characterized in that, In step (4), the debinding treatment adopts a combination of solvent debinding and thermal debinding, wherein the solvent debinding temperature is 40-60℃, the time is 4-8h; the thermal debinding temperature is 200-500℃, the heating rate is 1-5℃ / min, and the holding time is 2-6h.

9. The process for preparing high performance alloy material for rotating hook based on powder deoxidation degassing and MIM technology according to claim 4, characterized in that, In step (5), the sintering is carried out under an argon or nitrogen protective atmosphere, the sintering temperature is 1200-1400℃, the heating rate is 5-10℃ / min, the holding time is 2-4h, and the cooling rate is 10-20℃ / min.

10. The process for preparing high performance alloy material for rotating hook based on powder deoxidation degassing and MIM technology according to claim 4, characterized in that, In step (1), the particle size of the metal mixed powder is 5-20μm, wherein the purity of the iron, nickel, chromium and molybdenum powders is all ≥99.5%, and the purity of the aluminum and titanium powders is all ≥99.0%.

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