A powder metallurgy blackening treatment device and treatment process

Abstract

The invention relates to the technical field of powder metallurgy, and in particular to a powder metallurgy blackening treatment device and a treatment process. When a product is steam-sealed for treatment, temperature and pressure data in a furnace are monitored in real time; the temperature and pressure data in the furnace monitored in real time are compared and analyzed with a standard temperature curve and a standard pressure curve of the metallurgy blackening treatment process, respectively, to obtain deviation data; a blackening assessment coefficient is obtained by analysis, and then the blackening assessment coefficient is compared with a blackening assessment coefficient threshold to obtain a signal indicating whether the powder metallurgy blackening treatment is qualified; an impact judgment is made based on a blackening temperature divergence line segment and a blackening pressure divergence line segment to generate an impact signal; the current flow rate and regulation coefficient of steam introduced are obtained, and a corrected flow rate of steam introduced is output; the invention realizes the regulation of temperature and pressure in a powder metallurgy blackening treatment device to ensure that the powder metallurgy blackening process is in a stable heat preservation and pressure maintenance state.

Description

Technical Field

[0001] The invention relates to the technical field of powder metallurgy, and in particular to a powder metallurgy blackening treatment device and a treatment process. Background Art

[0002] Chinese patent CN102717082A discloses a method for producing a half coupling of a water pump by powder metallurgy, which belongs to the technical field of processing and manufacturing of complex structural parts. The technical key points are: put iron powder, copper powder, iron-phosphorus alloy powder, free-cutting agent, graphite powder and micro-powder wax prepared in proportion into a mixer and mix for 60 minutes, then put them into a mold and press them into shape under the condition of unit pressing pressure of 5.5T / cm2; put the pressed green sheet into a sintering furnace and sinter it at 1120° for 45 minutes in a protective atmosphere of hydrogen and nitrogen mixed gas; put the sintered green sheet into a special fixture for tapping; after ultrasonic cleaning and drying, steam treatment is carried out at 570°C in a steam treatment furnace for 90 minutes. Then it is finished after black electrophoretic paint.

[0003] In the prior art, powder metallurgy pressed products have voids, resulting in pores on the electrophoretic surface, making it impossible to form a smooth and effective electrophoretic protective layer. Powder metallurgy blackening treatment is used to form dense ferroferric oxide on the product surface. However, the current powder metallurgy blackening process is subject to temperature or pressure fluctuations, resulting in poor powder metallurgy blackening effects and poor quality of the dense ferroferric oxide formed on the product surface. Summary of the invention

[0004] The purpose of the present invention is to provide an integrated and efficient oxidation method for removing hypophosphorous from chemical plating wastewater. The technical problem solved by the present invention is that the current powder metallurgy blackening process may have temperature or pressure fluctuations, resulting in poor powder metallurgy blackening effect and the formation of dense ferrosoferric oxide on the product surface with poor quality.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A powder metallurgy blackening process comprises the following steps: placing a product in a furnace, introducing high-temperature steam into the furnace at 580°C, and maintaining the temperature and pressure for 120 minutes to form dense ferroferric oxide on the surface of the product. The temperature and pressure monitoring process comprises the following steps:

[0007] Step 1: During the product steam closed treatment, real-time monitoring of the temperature and pressure data in the furnace;

[0008] Step 2: Compare and analyze the temperature and pressure data in the real-time monitoring furnace with the standard temperature curve and standard pressure curve of the metallurgical blackening process to obtain deviation data;

[0009] Step 3: Based on the deviation data, the blackening evaluation coefficient is analyzed and obtained, and then the blackening evaluation coefficient is compared with the blackening evaluation coefficient threshold to obtain a signal whether the powder metallurgy blackening treatment is qualified;

[0010] Step 4: Based on the powder metallurgy blackening treatment unqualified signal, the impact judgment is performed based on the blackening temperature divergence line segment and the blackening pressure divergence line segment to generate an impact signal;

[0011] Step 5: Based on the influencing signal, the current flow rate and control coefficient of the steam introduced are obtained, and the corrected flow rate of the steam introduced is output.

[0012] As a further solution of the present invention: in step 1, the product is added into the furnace for metallurgical blackening treatment, and the temperature and pressure data in the furnace are monitored in real time, which are marked as real-time blackening temperature and real-time blackening pressure respectively.

[0013] As a further solution of the present invention: in step 2, the real-time blackening temperature is obtained, the real-time blackening temperature is substituted into the temperature model, and a real-time blackening temperature curve is plotted, and the real-time blackening temperature curve is analyzed and compared with a preset blackening temperature curve to obtain a temperature offset value;

[0014] The real-time blackening pressure is obtained, the real-time blackening pressure is substituted into the pressure model, and a real-time blackening pressure curve is plotted. The real-time blackening pressure curve is analyzed and compared with a preset blackening pressure curve to obtain a pressure offset value.

[0015] As a further solution of the present invention: the analysis and comparison process of the temperature offset value is:

[0016] Obtaining a real-time blackening temperature curve, extracting a blackening temperature divergence line segment between the real-time blackening temperature curve and a preset blackening temperature curve, and obtaining a divergence starting point and a divergence end point of the blackening temperature divergence line segment;

[0017] Calculate the difference between the horizontal coordinates of the blackening temperature divergence starting point and the blackening temperature divergence end point, and mark it as the blackening temperature divergence line segment X-axis offset value;

[0018] Calculate the difference between the vertical coordinates of the divergence starting point and the divergence end point, and mark it as the Y-axis offset value of the blackening temperature divergence line segment;

[0019] The temperature offset value is obtained by calculating the ratio of the Y-axis offset value of the blackening temperature divergence line segment to the X-axis offset value of the blackening temperature divergence line segment.

[0020] As a further solution of the present invention: the analysis and comparison process of the pressure offset value is:

[0021] Obtaining a real-time blackening pressure curve, extracting a blackening pressure divergence line segment between the real-time blackening pressure curve and a preset blackening pressure curve, and obtaining a divergence starting point and a divergence end point of the blackening pressure divergence line segment;

[0022] Calculate the difference between the horizontal coordinates of the blackening pressure divergence starting point and the blackening pressure divergence end point, and mark it as the blackening pressure divergence line segment X-axis offset value;

[0023] Calculate the difference between the ordinates of the divergence starting point and the divergence end point, and mark it as the Y-axis offset value of the blackened pressure divergence line segment;

[0024] The pressure offset value is obtained by calculating the ratio of the Y-axis offset value of the blackened pressure divergence line segment to the X-axis offset value of the blackened pressure divergence line segment.

[0025] As a further solution of the present invention: In step 3, the temperature offset value and the pressure offset value are obtained and marked as ZPt and ZPf respectively, and the formula The blackening evaluation coefficient XH is calculated; where a1 and a2 are both proportional coefficients;

[0026] If the blackening evaluation coefficient is greater than or equal to the blackening evaluation coefficient threshold, a powder metallurgy blackening treatment unqualified signal is generated;

[0027] If the blackening evaluation coefficient is less than the blackening evaluation coefficient threshold, a powder metallurgy blackening treatment qualified signal is generated.

[0028] As a further solution of the present invention: in step 4, when a signal of powder metallurgy blackening treatment failure is obtained, a blackening temperature divergence starting point, a blackening temperature divergence end point, a blackening pressure divergence starting point and a blackening pressure divergence end point are obtained;

[0029] Calculate the difference between the blackening temperature divergence starting point and the blackening pressure divergence starting point to obtain the blackening divergence starting point difference;

[0030] Then calculate the difference between the blackening temperature divergence endpoint and the blackening pressure divergence endpoint to obtain the blackening divergence endpoint difference;

[0031] The difference between the blackening divergence starting point and the blackening divergence end point is calculated and the impact judgment value is obtained;

[0032] If the impact judgment value is greater than or equal to the impact judgment threshold, an impact signal is generated.

[0033] As a further solution of the present invention: in step 5, when the influencing signal is obtained, the current flow rate and control coefficient of the steam introduced are obtained, the temperature offset value is multiplied by the control coefficient to obtain the corrected flow rate of the steam introduced, and the difference between the corrected flow rate of the steam introduced and the current flow rate of the steam introduced is calculated to obtain the regulated flow rate of the steam introduced.

[0034] As a further solution of the present invention: the process of obtaining the control coefficient is:

[0035] The temperature offset value and the pressure offset value are obtained, and the ratio of the pressure offset value to the temperature offset value is calculated to obtain the control coefficient.

[0036] A powder metallurgy blackening treatment device, the device comprising:

[0037] Acquisition module: real-time monitoring of the temperature and pressure data in the furnace during product steam sealing treatment;

[0038] Analysis module: compare and analyze the temperature and pressure data in the real-time monitoring furnace with the standard temperature curve and standard pressure curve of the metallurgical blackening process to obtain deviation data;

[0039] Generation module: Based on the deviation data, the blackening evaluation coefficient is analyzed and obtained, and then the blackening evaluation coefficient is compared with the blackening evaluation coefficient threshold to obtain a signal whether the powder metallurgy blackening treatment is qualified;

[0040] Impact module: Based on the unqualified signal of powder metallurgy blackening treatment, the impact judgment is made based on the blackening temperature divergence line segment and the blackening pressure divergence line segment, and an impact signal is generated;

[0041] Control module: Based on the influencing signal, the current flow rate and regulation coefficient of the steam entering are obtained, and the corrected flow rate of the steam entering is output.

[0042] Beneficial effects of the present invention:

[0043] (1) The present invention monitors the temperature and pressure data in the furnace in real time during the product steam sealing treatment; compares and analyzes the temperature and pressure data in the furnace in real time with the standard temperature curve and standard pressure curve of the metallurgical blackening treatment process, respectively, to obtain deviation data; based on the deviation data, analyzes and obtains the blackening evaluation coefficient, and then compares the blackening evaluation coefficient with the blackening evaluation coefficient threshold to obtain a signal of whether the powder metallurgical blackening treatment is qualified; the present invention collects the temperature and pressure parameters in the powder metallurgical blackening treatment process in real time, obtains the deviation degree of the powder metallurgical blackening treatment, and monitors the powder metallurgical blackening treatment process in real time;

[0044] (2) The present invention performs an impact judgment based on the powder metallurgy blackening treatment unqualified signal, the blackening temperature divergence line segment and the blackening pressure divergence line segment to generate an impact signal; based on the impact signal, the current flow rate and control coefficient of the steam introduced are obtained, and the corrected flow rate of the steam introduced is output; in the powder metallurgy blackening treatment process, the present invention performs a correlation analysis on the temperature and pressure, and based on the correlation signal, the steam in the powder metallurgy blackening treatment device is controlled in real time to achieve temperature and pressure control in the powder metallurgy blackening treatment device, thereby ensuring that the powder metallurgy blackening process is in a stable heat-keeping and pressure-maintaining state. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention will be further described below in conjunction with the accompanying drawings.

[0046] Figure 1 is a flowchart of Embodiment 1 of the present invention;

[0047] Figure 2 is a flowchart of Embodiment 2 of the present invention;

[0048] Figure 3 It is a system block diagram of embodiment 3 of the present invention. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Example 1

[0051] See also Figure 1 As shown, the present invention is a powder metallurgy blackening process, comprising the following steps:

[0052] S1. Put the prepared raw materials into a mixer and mix them for 60 minutes, then put them into a mold and press them at a unit pressure of 5.5T / cm 2 Under the conditions of , pressing and forming;

[0053] S2, placing the compact in a sintering furnace, and sintering at 1120° C. for 45 minutes in a protective atmosphere of a mixture of hydrogen and nitrogen;

[0054] S3, tapping the sintered blank on a special fixture;

[0055] S4, ultrasonic cleaning and drying;

[0056] S5. First, put the product into the furnace, and introduce high-temperature steam into the furnace at 580°C, and keep the temperature and pressure for 120 minutes to form dense ferroferric oxide on the surface of the product, and seal the surface gaps to avoid the internal pores from destroying the electrophoretic layer during direct electrophoresis.

[0057] S6, electrophoretically coating the steam-treated half coupling with black electrophoretic paint;

[0058] In S5, a heat preservation and pressure maintenance monitoring process is also included, and the heat preservation and pressure maintenance monitoring process includes the following steps:

[0059] Step 1: During the product steam closed treatment, real-time monitoring of the temperature and pressure data in the furnace;

[0060] In some embodiments, the product is added into a furnace for metallurgical blackening treatment, and the temperature and pressure data in the furnace are monitored in real time, which are marked as real-time blackening temperature and real-time blackening pressure, respectively;

[0061] Step 2: Compare and analyze the temperature and pressure data in the real-time monitoring furnace with the standard temperature curve and standard pressure curve of the metallurgical blackening process to obtain deviation data;

[0062] Wherein, the deviation data includes a temperature deviation value and a pressure deviation value;

[0063] In some embodiments, the real-time blackening temperature is obtained, the real-time blackening temperature is substituted into the temperature model, and a real-time blackening temperature curve is plotted, and the real-time blackening temperature curve is analyzed and compared with a preset blackening temperature curve to obtain a temperature offset value;

[0064] Among them, the analysis and comparison process of the temperature offset value is:

[0065] Obtaining a real-time blackening temperature curve, extracting a blackening temperature divergence line segment between the real-time blackening temperature curve and a preset blackening temperature curve, and obtaining a divergence starting point and a divergence end point of the blackening temperature divergence line segment;

[0066] Calculate the difference between the horizontal coordinates of the blackening temperature divergence starting point and the blackening temperature divergence end point, and mark it as the blackening temperature divergence line segment X-axis offset value;

[0067] Calculate the difference between the vertical coordinates of the divergence starting point and the divergence end point, and mark it as the Y-axis offset value of the blackening temperature divergence line segment;

[0068] The Y-axis offset value of the blackening temperature divergence line segment is calculated by ratio with the X-axis offset value of the blackening temperature divergence line segment to obtain the temperature offset value;

[0069] The divergent line segment is a line segment where the real-time blackening temperature curve and the preset blackening temperature curve are offset, in other words, a line segment portion where the real-time blackening temperature curve and the preset blackening temperature curve do not overlap;

[0070] Specifically, the temperature model is: with time as the X-axis and the blackening temperature as the Y-axis, substitute it into the temperature two-dimensional model, put the temperature of the standard process into the two-dimensional model, and draw a curve to obtain a temperature model containing a preset blackening temperature curve;

[0071] Acquire the real-time blackening pressure, substitute the real-time blackening pressure into the pressure model, and draw a real-time blackening pressure curve, analyze and compare the real-time blackening pressure curve with a preset blackening pressure curve to obtain a pressure offset value;

[0072] Among them, the analysis and comparison process of the pressure offset value is:

[0073] Obtaining a real-time blackening pressure curve, extracting a blackening pressure divergence line segment between the real-time blackening pressure curve and a preset blackening pressure curve, and obtaining a divergence starting point and a divergence end point of the blackening pressure divergence line segment;

[0074] Calculate the difference between the horizontal coordinates of the blackening pressure divergence starting point and the blackening pressure divergence end point, and mark it as the blackening pressure divergence line segment X-axis offset value;

[0075] Calculate the difference between the ordinates of the divergence starting point and the divergence end point, and mark it as the Y-axis offset value of the blackened pressure divergence line segment;

[0076] The Y-axis offset value of the blackened pressure divergence line segment is calculated by ratio with the X-axis offset value of the blackened pressure divergence line segment to obtain the pressure offset value;

[0077] The divergent line segment is a line segment where the real-time blackening pressure curve and the preset blackening pressure curve are offset, in other words, a line segment portion where the real-time blackening pressure curve and the preset blackening pressure curve do not overlap;

[0078] Specifically, the pressure model is: with time as the X-axis and the blackening pressure as the Y-axis, substitute into the pressure two-dimensional model, put the pressure of the standard process into the two-dimensional model, and draw a curve to obtain a pressure model containing a preset blackening pressure curve;

[0079] Step 3: Based on the deviation data, the blackening evaluation coefficient is analyzed and obtained, and then the blackening evaluation coefficient is compared with the blackening evaluation coefficient threshold to obtain a signal whether the powder metallurgy blackening treatment is qualified;

[0080] Wherein, whether the powder metallurgy blackening treatment is qualified or not includes a powder metallurgy blackening treatment qualified signal or a powder metallurgy blackening treatment unqualified signal;

[0081] In some embodiments, the temperature offset value and the pressure offset value are obtained and marked as ZPt and ZPf respectively, and the formula The blackening evaluation coefficient XH is calculated; wherein a1 and a2 are both proportional coefficients, a1 is 0.47, and a2 is 0.93;

[0082] comparing the blackening assessment coefficient with a blackening assessment coefficient threshold;

[0083] If the blackening evaluation coefficient is greater than or equal to the blackening evaluation coefficient threshold, it means that the temperature and pressure parameters of the current powder metallurgy blackening treatment are unstable, and a powder metallurgy blackening treatment unqualified signal is generated;

[0084] If the blackening evaluation coefficient is less than the blackening evaluation coefficient threshold, it means that the temperature and pressure parameters of the current powder metallurgy blackening treatment are stable, and a powder metallurgy blackening treatment qualified signal is generated;

[0085] The technical solution of the embodiment of the present invention is as follows: when the product is steam-sealed for treatment, the temperature and pressure data in the furnace are monitored in real time; the temperature and pressure data in the furnace are monitored in real time, respectively compared and analyzed with the standard temperature curve and standard pressure curve of the metallurgical blackening treatment process to obtain deviation data; based on the deviation data, a blackening assessment coefficient is obtained by analysis, and then the blackening assessment coefficient is compared with a blackening assessment coefficient threshold to obtain a signal on whether the powder metallurgical blackening treatment is qualified; the present invention collects the temperature and pressure parameters in the powder metallurgical blackening treatment process in real time, obtains the deviation degree of the powder metallurgical blackening treatment, and monitors the powder metallurgical blackening treatment process in real time.

[0086] Example 2

[0087] See also Figure 2 As shown, based on the above embodiment 1, the present invention is a powder metallurgy blackening process, which also includes the following steps:

[0088] Step 4: Based on the powder metallurgy blackening treatment unqualified signal, the impact judgment is performed based on the blackening temperature divergence line segment and the blackening pressure divergence line segment to generate an impact signal;

[0089] In some embodiments, when a signal of powder metallurgy blackening treatment failure is obtained, a blackening temperature divergence starting point, a blackening temperature divergence end point, a blackening pressure divergence starting point, and a blackening pressure divergence end point are obtained;

[0090] Calculate the difference between the blackening temperature divergence starting point and the blackening pressure divergence starting point to obtain the blackening divergence starting point difference;

[0091] Then calculate the difference between the blackening temperature divergence endpoint and the blackening pressure divergence endpoint to obtain the blackening divergence endpoint difference;

[0092] The difference between the blackening divergence starting point and the blackening divergence end point is calculated and the impact judgment value is obtained;

[0093] Then, the impact judgment value is compared with the impact judgment threshold;

[0094] If the impact judgment value is greater than or equal to the impact judgment threshold, it means that the simultaneity of abnormal temperature and pressure is small, and an impact signal is generated;

[0095] If the impact judgment value is less than the impact judgment threshold, it means that the simultaneity of abnormal temperature and pressure is small, and a no-impact signal is generated; when a no-impact signal is obtained, the powder metallurgy blackening treatment device needs to be repaired;

[0096] Step 5: Based on the influence signal, the current flow rate and control coefficient of the steam input are obtained, and the corrected flow rate of the steam input is output;

[0097] In some embodiments, when the influence signal is obtained, the current flow rate and the control coefficient of the steam being introduced are obtained, the temperature offset value is obtained and multiplied by the control coefficient to obtain a corrected flow rate of the steam being introduced, and the difference between the corrected flow rate of the steam being introduced and the current flow rate of the steam being introduced is calculated to obtain a controlled flow rate of the steam being introduced;

[0098] Among them, the process of obtaining the control coefficient is:

[0099] Obtaining a temperature offset value and a pressure offset value, calculating the ratio of the pressure offset value to the temperature offset value, and obtaining a control coefficient;

[0100] The calculation principle of the regulating flow rate of the steam is as follows: As can be seen from the above, the temperature and pressure are proportional, and the flow rate of the steam is positively correlated with the pressure in the powder metallurgy blackening treatment device. Therefore, the steam in the powder metallurgy blackening treatment device is regulated in real time to achieve the temperature and pressure regulation in the powder metallurgy blackening treatment device, so as to ensure that the powder metallurgy blackening process is in a stable heat preservation and pressure holding state;

[0101] The technical solution of the embodiment of the present invention: based on the powder metallurgy blackening treatment unqualified signal, the impact judgment is performed based on the blackening temperature divergence line segment and the blackening pressure divergence line segment, and an impact signal is generated; based on the impact signal, the current flow rate and control coefficient of the steam introduced are obtained, and the corrected flow rate of the steam introduced is output; in the powder metallurgy blackening treatment process, the present invention performs a correlation analysis on the temperature and pressure, and based on the correlation signal, the steam in the powder metallurgy blackening treatment device is controlled in real time to achieve the temperature and pressure control in the powder metallurgy blackening treatment device, thereby ensuring that the powder metallurgy blackening process is in a stable heat preservation and pressure maintenance state.

[0102] Example 3

[0103] See also Figure 3 As shown, the present invention is a powder metallurgy blackening treatment device, which is used to perform the process steps of the above-mentioned embodiment 1 and embodiment 2, and the device comprises:

[0104] Acquisition module: real-time monitoring of the temperature and pressure data in the furnace during product steam sealing treatment;

[0105] Analysis module: compare and analyze the temperature and pressure data in the real-time monitoring furnace with the standard temperature curve and standard pressure curve of the metallurgical blackening process to obtain deviation data;

[0106] Generation module: Based on the deviation data, the blackening evaluation coefficient is analyzed and obtained, and then the blackening evaluation coefficient is compared with the blackening evaluation coefficient threshold to obtain a signal whether the powder metallurgy blackening treatment is qualified;

[0107] Impact module: Based on the unqualified signal of powder metallurgy blackening treatment, the impact judgment is made based on the blackening temperature divergence line segment and the blackening pressure divergence line segment, and an impact signal is generated;

[0108] Control module: Based on the influencing signal, the current flow rate and regulation coefficient of the steam entering are obtained, and the corrected flow rate of the steam entering is output.

[0109] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0110] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A powder metallurgy blackening process, comprising the following steps: The product is placed in a furnace, and high-temperature steam is introduced into the furnace at 580°C, and the temperature is kept constant for 120 minutes to form dense ferroferric oxide on the surface of the product. The process is characterized in that the temperature-keeping and pressure-keeping monitoring process includes the following steps: Step 1: During the product steam closed treatment, real-time monitoring of the temperature and pressure data in the furnace; Step 2: Compare and analyze the temperature and pressure data in the real-time monitoring furnace with the standard temperature curve and standard pressure curve of the metallurgical blackening process to obtain deviation data; Step 3: Based on the deviation data, the blackening evaluation coefficient is analyzed and obtained, and then the blackening evaluation coefficient is compared with the blackening evaluation coefficient threshold to obtain a signal whether the powder metallurgy blackening treatment is qualified; Step 4: Based on the unqualified signal of powder metallurgy blackening treatment, the impact judgment is made based on the blackening temperature divergence line segment and the blackening pressure divergence line segment to generate an impact signal; Step 5: Based on the influence signal, the current flow rate and control coefficient of the steam input are obtained, and the corrected flow rate of the steam input is output; In step 2, the real-time blackening temperature is obtained, the real-time blackening temperature is substituted into the temperature model, and a real-time blackening temperature curve is plotted, and the real-time blackening temperature curve is analyzed and compared with a preset blackening temperature curve to obtain a temperature offset value; Acquire the real-time blackening pressure, substitute the real-time blackening pressure into the pressure model, and draw a real-time blackening pressure curve, analyze and compare the real-time blackening pressure curve with a preset blackening pressure curve to obtain a pressure offset value; The analysis and comparison process of temperature offset value is as follows: Obtaining a real-time blackening temperature curve, extracting a blackening temperature divergence line segment between the real-time blackening temperature curve and a preset blackening temperature curve, and obtaining a divergence starting point and a divergence end point of the blackening temperature divergence line segment; Calculate the difference between the horizontal coordinates of the blackening temperature divergence starting point and the blackening temperature divergence end point, and mark it as the blackening temperature divergence line segment X-axis offset value; Calculate the difference between the vertical coordinates of the divergence starting point and the divergence end point, and mark it as the Y-axis offset value of the blackening temperature divergence line segment; The Y-axis offset value of the blackening temperature divergence line segment is calculated by ratio with the X-axis offset value of the blackening temperature divergence line segment to obtain the temperature offset value; The analysis and comparison process of the pressure offset value is as follows: Obtaining a real-time blackening pressure curve, extracting a blackening pressure divergence line segment between the real-time blackening pressure curve and a preset blackening pressure curve, and obtaining a divergence starting point and a divergence end point of the blackening pressure divergence line segment; Calculate the difference between the horizontal coordinates of the blackening pressure divergence starting point and the blackening pressure divergence end point, and mark it as the blackening pressure divergence line segment X-axis offset value; Calculate the difference between the ordinates of the divergence starting point and the divergence end point, and mark it as the Y-axis offset value of the blackened pressure divergence line segment; The pressure offset value is obtained by calculating the ratio of the Y-axis offset value of the blackened pressure divergence line segment to the X-axis offset value of the blackened pressure divergence line segment.

2. A powder metallurgy blackening process according to claim 1, characterized in that: In step 1, the product is added into the furnace for metallurgical blackening treatment, and the temperature and pressure data in the furnace are monitored in real time, which are marked as real-time blackening temperature and real-time blackening pressure respectively.

3. A powder metallurgy blackening process according to claim 1, characterized in that: In step 3, the temperature offset value and pressure offset value are obtained and marked as ZPt and ZPf respectively, and the formula The blackening evaluation coefficient XH is calculated; where a1 and a2 are both proportional coefficients; If the blackening evaluation coefficient is greater than or equal to the blackening evaluation coefficient threshold, a powder metallurgy blackening treatment unqualified signal is generated; If the blackening evaluation coefficient is less than the blackening evaluation coefficient threshold, a powder metallurgy blackening treatment qualified signal is generated.

4. A powder metallurgy blackening process according to claim 1, characterized in that: In step 4, when a signal of powder metallurgy blackening treatment failure is obtained, a blackening temperature divergence starting point, a blackening temperature divergence end point, a blackening pressure divergence starting point, and a blackening pressure divergence end point are obtained; Calculate the difference between the blackening temperature divergence starting point and the blackening pressure divergence starting point to obtain the blackening divergence starting point difference; Then calculate the difference between the blackening temperature divergence endpoint and the blackening pressure divergence endpoint to obtain the blackening divergence endpoint difference; The difference between the blackening divergence starting point and the blackening divergence end point is calculated and the impact judgment value is obtained; If the impact judgment value is greater than or equal to the impact judgment threshold, an impact signal is generated.

5. A powder metallurgy blackening process according to claim 1, characterized in that: In step 5, when the influencing signal is obtained, the current flow rate and control coefficient of the steam input are obtained, the temperature offset value is multiplied by the control coefficient to obtain the corrected flow rate of the steam input, and the difference between the corrected flow rate of the steam input and the current flow rate of the steam input is calculated to obtain the controlled flow rate of the steam input.

6. A powder metallurgy blackening process according to claim 5, characterized in that: The process of obtaining the control coefficient is: The temperature offset value and the pressure offset value are obtained, and the ratio of the pressure offset value to the temperature offset value is calculated to obtain the control coefficient.

7. A powder metallurgy blackening treatment device, characterized in that: The device is used to perform the process described in any one of claims 1 to 6, and comprises: Acquisition module: real-time monitoring of the temperature and pressure data in the furnace during product steam sealing treatment; Analysis module: compare and analyze the temperature and pressure data in the real-time monitoring furnace with the standard temperature curve and standard pressure curve of the metallurgical blackening process to obtain deviation data; Generation module: Based on the deviation data, the blackening evaluation coefficient is analyzed and obtained, and then the blackening evaluation coefficient is compared with the blackening evaluation coefficient threshold to obtain a signal whether the powder metallurgy blackening treatment is qualified; Impact module: Based on the unqualified signal of powder metallurgy blackening treatment, the impact judgment is made based on the blackening temperature divergence line segment and the blackening pressure divergence line segment, and an impact signal is generated; Control module: Based on the influencing signal, the current flow rate and regulation coefficient of the steam entering are obtained, and the corrected flow rate of the steam entering is output.

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