Precipitation hardening stainless steel structure property regulation and control heat treatment process and device

Abstract

The precipitation hardening stainless steel structure performance regulation and control heat treatment device specifically comprises a conveying frame, a temperature locking box body is arranged above the conveying frame, a temperature locking top cover is arranged at the top of the temperature locking box body, material lifting supporting frames are symmetrically embedded in the middles of the two sides of the temperature locking box body, and a plurality of sets of net boxes are arranged at the top of the conveying frame; a servo motor is embedded in the outer wall of the top of the material lifting supporting frame. According to the device, the net box is made to rotate through the lifting air cylinder, the servo motor and other components, the stainless steel part is evenly heated in the rolling process, and meanwhile oxide skin and impurities are promoted to fall off; an inclined pushing air cylinder drives an inclined sealing plate to form a circulating heat cavity, a circulating air pump is matched with an inclined spraying arc frame and a dense spraying plate, the temperature in the cavity is balanced, and local overheating or supercooling is avoided. The high-temperature-resistant propelling air cylinder enables the adjustable heater and the main heater to form an annular heat ring, stainless steel parts are heated in a centralized mode, extracted hot air is recycled after being treated, and efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of stainless steel material processing, and specifically provides a heat treatment process and device for regulating the microstructure and properties of precipitation-hardening stainless steel. Background Art

[0002] With the continuous progress of modern high-tech industries, such as aerospace, military, petrochemical, nuclear power, shipbuilding and other fields, the performance requirements for metal materials are becoming increasingly stringent. Materials are required to have comprehensive properties such as high strength, high toughness, good corrosion resistance and excellent machinability to meet the usage requirements under various complex working conditions and extreme environments.

[0003] In some application scenarios with high-quality requirements, such as ship components in deep-sea environments and structural components in nuclear reactors, materials not only have to withstand harsh conditions such as high pressure and high temperature, but also resist the erosion of corrosive media such as seawater and nuclear radiation. Precipitation-hardening stainless steel can meet the requirements of these specific scenarios to a certain extent because its microstructure and properties can be regulated by heat treatment.

[0004] It should be noted in combination with the above content that the Chinese patent with the application number CN2023233745645 discloses a heat treatment device for martensitic precipitation-hardening stainless steel. The set driving motor drives a linkage gear set composed of a driving gear, a transmission gear and a driven gear to rotate, driving the hardening stainless steel to rotate at a constant speed, so as to realize uniform heating of the stainless steel to be processed in the furnace; However, in the actual continuous processing production line of batch precipitation-hardening stainless steel, the heat affected by the precipitation-hardening stainless steel is not only the interference of the clamping components, but also the multi-angle coverage range of the internal temperature of the heat treatment device on the area where the precipitation-hardening stainless steel passes through, as well as the controllability of the temperature. Therefore, the adopted rotating structure has certain limitations for the overall heat treatment of precipitation-hardening stainless steel. Summary of the Invention

[0005] The purpose of the present invention is to provide a heat treatment process and device for regulating the microstructure and properties of precipitation-hardening stainless steel to solve the problems raised.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A heat treatment device for regulating the microstructure and properties of precipitation-hardening stainless steel, including a conveying frame, a temperature-locking box body is arranged above the conveying frame, a temperature-locking top cover is arranged on the top of the temperature-locking box body, lifting support frames are symmetrically embedded in the middle of both sides of the temperature-locking box body, multiple network boxes are arranged on the top of the conveying frame, a servo motor is embedded on the outer wall of the top of the lifting support frame, and a slider is slidably sleeved on the inner wall of the lifting support frame; A main heater is embedded in the center of the top of the temperature-locking box body. Adjustable heaters are arranged below both ends of the main heater. Aggregate inner frames close to the conveying rack are arranged at the bottoms of both ends of the temperature-locking box body. A plurality of inclined sealing plates facing the adjustable heaters are slidably arranged on the inner walls of the aggregate inner frames.

[0007] Further, a sliding socketed tray is arranged on the top of the conveying rack. Symmetrical card slots are recessed on the top of the tray. Card plates embedded inside the card slots are arranged at the bottom of the mesh box. Docking blocks are symmetrically arranged in the middle of both sides of the mesh box. A cross-shaped notch is recessed in the middle of the outer side wall of the docking block.

[0008] Further, lifting cylinders are symmetrically embedded inside the side of the material-lifting support frame close to the conveying rack. The lifting cylinders are sleeved with sliders. Inner extending cylinder arms are sleeved in the middle of the sliders. Rotary sleeve arms are sleeved in the middle of the inner extending cylinder arms. A cross-shaped docking buckle is arranged on the cross section of the side of the rotary sleeve arm facing the conveying rack. A telescopic shaft rod drivingly connected to the output end of the servo motor is arranged inside the rotary sleeve arm.

[0009] Further, the main heater is semicircularly embedded in the center of the inner wall of the top of the temperature-locking box body. Arc-shaped grooves are recessed at the bottoms of both ends of the main heater. And the adjustable heater is slidably sleeved in the arc-shaped grooves. High-temperature resistant propulsion cylinders are arranged inside the arc-shaped grooves. A hot gas return port extending towards both ends is arranged in the center of the top of the main heater.

[0010] Further, high-temperature resistant filter elements are sleeved inside both ends of the temperature-locking box body. The high-temperature resistant filter elements are connected to the hot gas return port. A circulating air pump close to the aggregate inner frame is arranged at the bottom of the high-temperature resistant filter element.

[0011] Further, inclined push cylinders connected to the inclined sealing plates are embedded on the inner walls of the aggregate inner frames. An arc-shaped cylinder groove is recessed in the center of the top of the aggregate inner frame. A plurality of inclined spray arc frames are arranged on the inner wall of the arc-shaped cylinder groove. A dense spray plate close to the adjustable heater is arranged on the top of the aggregate inner frame. Heat pipes connected to the circulating air pump are arranged inside both the inclined spray arc frames and the dense spray plate. A slag discharge valve connected to the arc-shaped cylinder groove is arranged on the outer wall of the temperature-locking box body.

[0012] The present invention also proposes a heat treatment process for regulating the microstructure and properties of precipitation-hardening stainless steel, comprising the following steps: Feeding preparation: putting the semi-finished precipitation-hardening stainless steel parts into the mesh box, fixing them with the card plates, and continuously transporting the mesh box to the temperature-locking box body through the tray; Lifting preparation: the lifting cylinders drive the sliders to descend, so that the cross-shaped docking buckle is docked with the notch of the mesh box, and then ascend to dock the rotary sleeve arm with the servo motor, lifting the mesh box between the main heaters. The main heater and the adjustable heaters cooperate to heat. The servo motor drives the mesh box to rotate, so that the stainless steel parts are heated during tumbling, promoting the peeling off of oxide scales and impurities; Closed - cavity circulation: The inclined - push cylinder drives the inclined sealing plate to cut off the channel to form a circulating heat cavity. The circulating air pump makes the hot air in the cavity circulate to balance the temperature. Annular heat collection: The high - temperature resistant propulsion cylinder makes the adjustable heater and the main heater form an annular heat ring to centrally heat the stainless - steel parts. The hot air is recycled after being processed.

[0013] The beneficial effects of the present invention are as follows: 1. The present invention realizes the continuous transportation and precise positioning of semi - finished precipitation - hardened stainless - steel parts through the mesh box, card board, card slot and tray, ensuring the continuity and stability of processing, and achieving precise transportation and positioning. The lifting cylinder, servo motor, etc. cooperate to drive the mesh box to rotate, making the semi - finished precipitation - hardened stainless - steel parts inside continuously tumble, rub and collide, ensuring that the outer peripheral wall is continuously subjected to high - temperature treatment, improving the uniformity of heat treatment, and realizing uniform heat treatment.

[0014] 2. The present invention utilizes the characteristics that oxide scale is easy to form and fall off in a high - temperature environment. By tumbling the semi - finished precipitation - hardened stainless - steel parts, the oxide scale can be quickly removed, avoiding subsequent pollution. At the same time, it helps the internal impurities to fall off, improves the product quality, and automatically cleans the oxide scale and impurities.

[0015] 3. The present invention drives the inclined sealing plate by the inclined - push cylinder to cut off the channel to form a circulating heat cavity. The circulating air pump cooperates with the inclined spray arc frame and the dense spray plate, and uses the principles of heat convection and buoyancy to balance the temperature in the cavity, avoiding abnormal local temperature, enhancing the controllability of heat treatment, and optimizing the heat - cavity environment. The high - temperature resistant propulsion cylinder drives the adjustable heater and the main heater to form an annular heat - ring structure to conduct high - temperature centralized heat treatment on the semi - finished precipitation - hardened stainless - steel parts, improving the heating efficiency and effect, and achieving centralized and efficient heating. The circulating air pump extracts, filters and shunts the high - temperature gas, realizes the recycling of hot gas, improves the energy utilization rate, and at the same time assists in cleaning impurities, achieving gas recycling. Brief description of the drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following - described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a process - flow schematic diagram of the present invention; Figure 2 It is a three - dimensional view of the overall structure of the present invention; Figure 3 It is a structural schematic diagram of the conveying rack of the present invention; Figure 4 It is a structural schematic diagram of the mesh box of the present invention; Figure 5 It is a schematic structural diagram of the temperature-locking box body of the present invention; Figure 6 It is a schematic internal structure diagram of the temperature-locking box body of the present invention; Figure 7 It is a schematic structural diagram of the aggregate inner frame of the present invention; Figure 8 It is a schematic structural diagram of the material-lifting support frame of the present invention; Figure 9 It is a schematic connection diagram of the servo motor and the rotating collar arm of the present invention.

[0018] Reference numerals: 1, conveying frame; 101, tray; 102, mesh box; 103, docking block; 104, clamping plate; 2, temperature-locking box body; 201, main heater; 202, adjustable heater; 203, hot air return port; 204, high-temperature resistant filter element; 205, circulating air pump; 3, temperature-locking top cover; 4, material-lifting support frame; 401, servo motor; 402, lifting cylinder; 403, slider; 404, inner extending cylinder arm; 405, rotating collar arm; 406, cross docking buckle; 5, aggregate inner frame; 501, inclined sealing plate; 502, inclined spraying arc frame; 503, dense spraying plate. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment 1: Please refer to Figure 1 - Figure 9 As shown, this embodiment is a heat treatment device for regulating the microstructure and properties of precipitation-hardening stainless steel, including a conveying frame 1. A temperature-locking box body 2 is arranged above the conveying frame 1. A temperature-locking top cover 3 is arranged on the top of the temperature-locking box body 2. Lifting support frames 4 are symmetrically embedded in the middle of both sides of the temperature-locking box body 2; A plurality of mesh boxes 102 are arranged on the top of the conveying frame 1. A servo motor 401 is embedded on the outer wall of the top of the lifting support frame 4, and a slider 403 is slidably sleeved on the inner wall of the lifting support frame 4; The semi-finished precipitation-hardening stainless steel parts are placed inside the mesh box 102. The mesh box 102 is closed and clamped into the card slot through the clamping plate 104. The tray 101 drives the mesh box 102 loaded with semi-finished precipitation-hardening stainless steel parts to continuously transport towards the temperature-locking box body 2.

[0021] At the top of the conveying rack 1, there is a slidingly sleeved tray 101. The top of the tray 101 is recessed with symmetric card slots. At the bottom of the mesh box 102, there is a card board 104 embedded inside the card slots. At the middle parts of both sides of the mesh box 102, there are symmetric docking blocks 103. In the middle of the outer side wall of the docking block 103, there is a recessed cross-shaped notch. The lifting cylinder 402 drives the slider 403 to slide down along the lifting support frame 4 to the bottommost position, causing the cross docking buckle 406 to align with the cross-shaped notch on the mesh box 102. The inner extension cylinder arm 404 drives the rotating collar arm 405 and the cross docking buckle 406 to move until the cross docking buckle 406 is completely inserted into the cross-shaped notch, and a part of the rotating collar arm 405 is embedded in the docking block 103, realizing a temporary docking group process.

[0022] On the inner side close to the conveying rack 1 of the lifting support frame 4, there are symmetrically embedded lifting cylinders 402. The lifting cylinders 402 are sleeved with the slider 403. In the middle of the slider 403, there is an inner extension cylinder arm 404 sleeved. In the middle of the inner extension cylinder arm 404, there is a rotating collar arm 405 sleeved. On the cross section of the side of the rotating collar arm 405 facing the conveying rack 1, there is a cross docking buckle 406. Inside the rotating collar arm 405, there is a telescopic shaft rod drivingly connected to the output end of the servo motor 401.

[0023] The lifting cylinder 402 drives the slider 403 to slide up along the lifting support frame 4 to the topmost position, causing the outer wall area of the rotating collar arm 405 to align with the output end of the servo motor 401. There is a coupling on the output end of the servo motor 401 connected to the telescopic shaft rod. After the mesh box 102 is carried and lifted and stops, it is located between the main heaters 201.

[0024] According to the high-temperature heat generated by the subsequent coordinated operation of the main heater 201 and the adjustable heater 202, the semi-finished product precipitation-hardened stainless steel parts inside the mesh box 102 are heat-treated. During the heat treatment, the servo motor 401 is drivingly connected to the rotating collar arm 405 through the coupling and the telescopic shaft rod, and then drives the rotating collar arm 405 to rotate at a constant speed. The rotating collar arm 405 drives the mesh box 102 to rotate synchronously through the cross docking buckle 406, the cross-shaped notch and the docking block 103, causing the semi-finished product precipitation-hardened stainless steel parts inside the mesh box 102 to continuously roll, and then enabling the semi-finished product precipitation-hardened stainless steel parts to be rubbed, impacted and tumbled, and the outer peripheral walls of the semi-finished product precipitation-hardened stainless steel parts to be continuously heat-treated at high temperature.

[0025] In the high-temperature environment of heat treatment, elements such as iron and chromium on the surface of semi-finished precipitation hardening stainless steel parts will react with oxygen in the air to form oxide scales. When the oxide scales form to a certain extent, along with the continuous rolling, friction, and impact of the semi-finished precipitation hardening stainless steel parts, it promotes the rapid shedding of the oxide scales, thereby avoiding the subsequent contact of the semi-finished precipitation hardening stainless steel parts with the external low-temperature air after they are separated from the temperature-locking cylinder cover, which may cause the oxide scales to fall off and contaminate the transport rack or the production environment.

[0026] The semi-finished precipitation hardening stainless steel parts may contain some impurity elements or inclusions of alloy elements. During the heat treatment process, due to changes in temperature and composition, these impurities or inclusions may precipitate and aggregate at positions such as grain boundaries or phase boundaries. When their aggregation reaches a certain extent, they may peel off from the matrix, resulting in a phenomenon similar to slag falling. Therefore, during the heat treatment of the semi-finished precipitation hardening stainless steel parts inside the mesh box 102, continuous rolling, friction, and impact contribute to the removal of impurities inside the semi-finished precipitation hardening stainless steel parts.

[0027] Embodiment 2: This embodiment is a heat treatment device for regulating the microstructure and properties of precipitation hardening stainless steel, including a main heater 201 embedded in the center of the top of the temperature-locking box body 2. Adjustable heaters 202 are arranged below both ends of the main heater 201. Aggregate inner frames 5 close to the conveyor rack 1 are arranged at the bottoms of both ends of the temperature-locking box body 2. A plurality of inclined sealing plates 501 facing the adjustable heaters 202 are slidably arranged on the inner walls of the aggregate inner frames 5.

[0028] The main heater 201 is semicircularly embedded in the center of the inner wall of the top of the temperature-locking box body 2. Arc-shaped grooves are recessed at the bottoms of both ends of the main heater 201, and the adjustable heaters 202 are slidably sleeved in the arc-shaped grooves. A high-temperature resistant propulsion cylinder is arranged inside the arc-shaped grooves. A hot gas return port 203 extending towards both ends is arranged at the center of the top of the main heater 201.

[0029] High-temperature resistant filter elements 204 are sleeved inside both ends of the temperature-locking box body 2. The high-temperature resistant filter elements 204 are connected to the hot gas return port 203. A circulating gas pump 205 close to the aggregate inner frame 5 is arranged at the bottom of the high-temperature resistant filter elements 204.

[0030] When the semi-finished precipitation hardening stainless steel parts stay below the main heater 201, the high-temperature resistant propulsion cylinder drives the adjustable heaters 202 to slide downward along the arc-shaped grooves until the bottoms of the plurality of adjustable heaters 202 are connected to each other and form a temporary circular heat ring structure with the main heater 201. The main heater 201 and the adjustable heaters 202 operate simultaneously, generating high temperature and converging towards the middle, so that the semi-finished precipitation hardening stainless steel parts staying at the center of the circular heat ring structure are subjected to high-temperature centralized heat treatment.

[0031] During the high-temperature centralized heat treatment of semi-finished precipitation hardening stainless steel parts, the circulating air pump 205 extracts the high-temperature hot air dissipated in the annular hot circle structure through the hot air return port 203, guides it to the high-temperature resistant filter element 204, and after the high-temperature resistant filter element 204 filters it, the circulating air pump 205 guides and diverts it to the inclined spray arc frame 502 and the dense spray plate 503.

[0032] On the inner wall of the inner frame 5 of the aggregate, there is an inclined push cylinder connected to the inclined sealing plate 501. The center of the top of the inner frame 5 of the aggregate is recessed to form an arc-shaped barrel groove. On the inner wall of the arc-shaped barrel groove, there are multiple groups of inclined spray arc frames 502. On the top of the inner frame 5 of the aggregate, there is a dense spray plate 503 close to the adjustable heater 202. Inside both the inclined spray arc frame 502 and the dense spray plate 503, there are heat pipes connected to the circulating air pump 205. On the outer wall of the temperature-locking box body 2, there is a slag discharge valve connected to the arc-shaped barrel groove.

[0033] After waiting for the semi-finished precipitation hardening stainless steel parts to pass through the inner frame 5 of the aggregate, the inclined push cylinder drives multiple groups of inclined sealing plates 501 to slide upward. The tops of the multiple groups of inclined sealing plates 501 are in contact with each other, forming an inverted V-shaped structure, and temporarily blocking the channel between the conveying frame 1 and the temperature-locking box body 2, prompting a circulating heat cavity to be formed between the main heater 201 and the inclined sealing plate 501 inside the temperature-locking box body 2.

[0034] During the heat treatment, the circulating air pump 205 filters the extracted high-temperature gas and diverts it to the inclined spray arc frame 502 and the dense spray plate 503 through the heat pipe. The inclined spray arc frame 502 guides part of the air flow to spray obliquely onto the surface of the inclined sealing plate 501, prompting the impurities accumulated on the surface of the inclined sealing plate 501 to gather in the slag discharge valve area of the temperature-locking box body 2 under the continuous push of the air flow.

[0035] The dense spray plate 503 guides part of the high-temperature air flow to continuously fill the bottom space of the circulating heat cavity. Combining with the high-temperature air flow sprayed by the inclined spray arc frame 502, it prompts the pressure in the bottom space of the circulating heat cavity to continuously increase. Combining with the heat convection and buoyancy principle of the upward flow of the high-temperature hot air and the continuous suction effect of the hot air return port 203, it prompts the high-temperature gas inside the circulating heat cavity to flow continuously, thereby prompting the temperatures in each area inside the circulating heat cavity to be evenly processed, effectively avoiding the phenomenon of local high-temperature gas retention, local high heat or local low heat, and further enabling the controllability of the heat treatment of semi-finished precipitation hardening stainless steel parts.

[0036] Combining Embodiment 1 and Embodiment 2, it can be seen that the semi-finished product is placed in the mesh box 102 and transported to the temperature-locking box body 2 through the tray 101. The mesh box 102 is rotated by the lifting cylinder 402, the servo motor 401, etc., so that the stainless steel parts are evenly heated during tumbling, and at the same time, the oxide scale and impurities are promoted to fall off. Then, the inclined push cylinder drives the inclined sealing plate 501 to form a circulating heat chamber, and the circulating air pump 205 cooperates with the inclined spray arc frame 502 and the dense spray plate 503 to balance the temperature in the chamber and avoid local overheating or overcooling. Finally, the high-temperature resistant propulsion cylinder makes the adjustable heater 202 and the main heater 201 form an annular heat ring to centrally heat the stainless steel parts, and the extracted hot air is recycled after being processed, improving the efficiency.

[0037] Embodiment 3: This embodiment also proposes a heat treatment process for regulating the microstructure and properties of precipitation-hardening stainless steel, including the following steps: Feeding preparation: The semi-finished precipitation-hardening stainless steel parts are placed in the mesh box (102) and fixed with the clamping plate (104), and the mesh box (102) is continuously transported to the temperature-locking box body (2) through the tray (101); Lifting preparation: The lifting cylinder (402) drives the slider (403) to descend, so that the cross docking buckle (406) is docked with the notch of the mesh box (102), and then rises to dock the rotating sleeve ring arm (405) with the servo motor (401), and the mesh box (102) is lifted between the main heaters (201). The main and adjustable heaters (202) cooperate to heat, and the servo motor (401) drives the mesh box (102) to rotate, so that the stainless steel parts are heated during tumbling, and the oxide scale and impurities are promoted to fall off; Closed cavity circulation: The inclined push cylinder drives the inclined sealing plate (501) to cut off the channel to form a circulating heat chamber, and the circulating air pump (205) circulates the hot air in the chamber to balance the temperature; Annular heat collection: The high-temperature resistant propulsion cylinder makes the adjustable heater (202) and the main heater (201) form an annular heat ring to centrally heat the stainless steel parts, and the hot air is recycled after being processed.

[0038] Obviously, according to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A precipitation hardening stainless steel microstructure and property control heat treatment device, comprising a conveyor frame (1), characterized in that: A temperature-locking box (2) is arranged above the conveying frame (1), a temperature-locking top cover (3) is arranged on the top of the temperature-locking box (2), a material lifting support frame (4) is symmetrically embedded in the middle of both sides of the temperature-locking box (2), a plurality of net boxes (102) are arranged on the top of the conveying frame (1), a servo motor (401) is embedded on the outer wall of the top of the material lifting support frame (4), and a slider (403) is slidably sleeved on the inner wall of the material lifting support frame (4); A main heater (201) is embedded in the center of the top of the temperature-locking box (2), and adjustable heaters (202) are arranged below both ends of the main heater (201). An inner material collecting frame (5) close to the conveying frame (1) is arranged at the bottom of both ends of the temperature-locking box (2), and a plurality of groups of inclined sealing plates (501) facing the adjustable heater (202) are slidably arranged on the inner wall of the inner material collecting frame (5).

2. The precipitation hardening stainless steel microstructure and properties control heat treatment device according to claim 1, characterized in that: A slidably sleeved tray (101) is arranged on the top of the conveying frame (1), a symmetrical card slot is arranged in a recessed manner on the top of the tray (101), a card plate (104) embedded in the card slot is arranged on the bottom of the net box (102), docking blocks (103) are symmetrically arranged in the middle of both sides of the net box (102), and a cross-shaped notch is arranged in a recessed manner in the middle of the outer wall of the docking block (103).

3. The precipitation hardening stainless steel microstructure and properties control heat treatment device according to claim 1, characterized in that: A lifting cylinder (402) is symmetrically embedded inside the material lifting support frame (4) on one side close to the conveying frame (1); the lifting cylinder (402) is sleeved with a slider (403); an inwardly extending cylinder arm (404) is sleeved in the middle of the slider (403); a rotating collar arm (405) is sleeved in the middle of the inwardly extending cylinder arm (404); a cross-jointing buckle (406) is provided on the cross section of the rotating collar arm (405) facing the conveying frame (1); a telescopic shaft rod is provided inside the rotating collar arm (405) and is transmission-connected to the output end of the servo motor (401).

4. The precipitation hardening stainless steel microstructure and properties control heat treatment device according to claim 1, characterized in that: The main heater (201) is semicircularly embedded in the center of the top inner wall of the temperature-locking box (2), the bottoms of both ends of the main heater (201) are recessed with arc grooves, and the adjustable heater (202) is slidably sleeved in the arc grooves, and the top center of the main heater (201) is provided with a hot air return port (203) extending to both ends.

5. The precipitation hardening stainless steel microstructure and properties control heat treatment device according to claim 4, characterized in that: High temperature resistant filter elements (204) are sleeved inside the two ends of the temperature lock box (2), the high temperature resistant filter element (204) is connected to the hot air return port (203), and a circulating air pump (205) close to the aggregate inner frame (5) is arranged at the bottom of the high temperature resistant filter element (204).

6. The precipitation hardening stainless steel microstructure and properties control heat treatment device according to claim 1, characterized in that: An oblique thrust cylinder connected to an oblique sealing plate (501) is embedded on the inner wall of the aggregate inner frame (5); an arc-shaped cylindrical groove is provided in a central depression at the top of the aggregate inner frame (5); a plurality of groups of oblique arc spray frames (502) are provided on the inner wall of the arc-shaped cylindrical groove; and a dense spray plate (503) close to the adjustable heater (202) is provided on the top of the aggregate inner frame (5).

7. A precipitation hardening stainless steel microstructure and properties regulation heat treatment process, used in the precipitation hardening stainless steel microstructure and properties regulation heat treatment device as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: Material preparation: placing the semi-finished precipitation-hardened stainless steel parts into the mesh box (102), fixing them with a clamping plate (104), and continuously transporting the mesh box (102) to the temperature-locking box (2) via a pallet (101); Material lifting preparation: the lifting cylinder (402) drives the slider (403) to descend, so that the cross docking buckle (406) docks with the notch of the net box (102), and then rises to dock the rotating collar arm (405) with the servo motor (401), and the net box (102) is lifted to the main heater (201). The main and adjustable heaters (202) are heated in coordination, and the servo motor (401) drives the net box (102) to rotate, so that the stainless steel parts are heated during tumbling, and the oxide scale and impurities are promoted to fall off; Closed cavity circulation: the oblique thrust cylinder drives the oblique sealing plate (501) to block the channel to form a circulating heat cavity, and the circulating air pump (205) circulates the hot air in the cavity to balance the temperature; Annular heat collection: The high temperature resistant propulsion cylinder enables the adjustable heater (202) and the main heater (201) to form an annular heat ring, which heats the stainless steel parts in a centralized manner, and the hot gas is recycled after being processed.

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