A production control process for tungsten-copper alloys

Abstract

The present application relates to tungsten copper alloy technical field, specifically to a kind of production control process of tungsten copper alloy, comprising the following steps: according to the promoting or inhibiting effect of the pressure used when pressing forming, the detection parameters before forming are divided into promoting parameters and inhibiting parameters;According to the pressure promoting parameter, the pressure promoting ratio is determined, according to the pressure inhibiting parameter, the pressure inhibiting ratio is determined, the pressure promoting ratio and the pressure inhibiting ratio are balanced analysis, and the pressure adjustment ratio is obtained;According to the obtained pressure adjustment ratio, the pressure value of pressing forming is determined, according to the promoting parameter and inhibiting parameter, the influence proportion of density is analyzed, the pressure time of pressing forming is determined, and the tungsten copper alloy powder pressing forming strategy is obtained based on the determined pressure value and pressure time of pressing forming;The present application makes the pressing forming process more accurate control, improves the precision of pressing forming, and then has a positive effect on the quality of tungsten copper alloy produced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of tungsten-copper alloys, in particular to a production control process of a tungsten-copper alloy. BACKGROUND

[0002] A tungsten-copper alloy is an alloy composed of tungsten and copper. The copper content of a commonly used alloy is 10% to 50%. The alloy is prepared by a powder metallurgy method, has good electrical conductivity and thermal conductivity, good high-temperature strength and certain plasticity. At a very high temperature, such as above 3000 DEG C, the copper in the alloy is liquefied and evaporated, a large amount of heat is absorbed, and the surface temperature of the material is reduced. Therefore, this kind of material is also called a metal perspiration material.

[0003] Chinese patent CN106435319B discloses a tungsten-copper alloy and a preparation method thereof. In view of the problem that the tungsten-copper alloy prepared by the existing method is segregated in tungsten and copper phases, thereby leading to uneven alloy organization, the application provides a tungsten-copper alloy and a preparation method thereof. The tungsten powder is first subjected to plasma spheroidization treatment, then chemical copper plating is performed on the tungsten powder by using copper powder as an inducer, and then the tungsten-copper alloy with uniform organization is prepared through the steps of pressing forming, pre-sintering and tungsten-copper infiltration. The method changes the tungsten powder from a polygonal shape to a spherical shape, improves the dispersibility, and ensures the uniform distribution of the tungsten-copper in the chemical copper plating process.

[0004] In the traditional tungsten-copper alloy pressing forming process, the setting of process parameters mainly depends on experience accumulation or a static model, and the systematized classification and dynamic analysis capability of pretreatment parameters (such as particle size distribution, sphericity and hardness of the tungsten powder after copper plating) of raw material powder are lacked; the tungsten-copper alloy compact is often abnormal in density gradient and insufficient in interface bonding strength, which seriously affects the yield of finished products and the material performance (such as electrical conductivity and thermal expansion coefficient) in the subsequent sintering process. Therefore, it is urgent to develop a pressing forming process control method based on dynamic analysis of precursor parameters, so as to realize self-adaptive and accurate matching of pressing parameters. SUMMARY

[0005] The application aims to provide a hot pressing control method and system based on a shaving board production, so as to solve the technical problem in the background that in the traditional tungsten-copper alloy pressing forming process, the setting of process parameters mainly depends on experience accumulation or a static model, and the systematized classification and dynamic analysis capability of pretreatment parameters (such as particle size distribution, sphericity and hardness of the tungsten powder after copper plating) of raw material powder are lacked.

[0006] The purpose of the application can be achieved by the following technical solutions:

[0007] A production control process of a tungsten-copper alloy, comprising the following steps:

[0008] The spheroidized tungsten powder after copper plating is pre-detected to obtain detection parameters before forming;

[0009] According to the promoting or inhibiting effect of the pressure used in the compression molding on the pre-molding detection parameters, the pre-molding detection parameters are divided into promoting parameters and inhibiting parameters;

[0010] According to the pressure promoting parameters, a pressure promoting ratio is determined, according to the pressure inhibiting parameters, a pressure inhibiting ratio is determined, and the pressure promoting ratio and the pressure inhibiting ratio are balanced to obtain a pressure adjustment ratio;

[0011] According to the obtained pressure adjustment ratio, the pressure value of the compression molding is determined, and at the same time, according to the promoting parameters and the inhibiting parameters, the influence proportion on the compactness is analyzed to determine the pressure time of the compression molding, and based on the determined pressure value and pressure time of the compression molding, the compression molding strategy of the tungsten-copper alloy powder is obtained.

[0012] As a further technical solution of the present application: the pre-molding detection parameters include the powder particle size average, the powder sphericity average, and the powder hardness average.

[0013] As a further technical solution of the present application: the specific process of dividing the pre-molding detection parameters into promoting parameters is:

[0014] All the judged particle size promoting parameters or particle size inhibiting parameters, sphericity promoting parameters or sphericity inhibiting parameters, and hardness promoting parameters or hardness inhibiting parameters are obtained, classified according to the promoting or inhibiting properties, and the pressure promoting parameters and the pressure inhibiting parameters are obtained.

[0015] As a further technical solution of the present application: if the powder particle size average is greater than the process set particle size parameter, the powder particle size average is defined as the particle size inhibiting parameter, and if the powder particle size average is less than the process set particle size parameter, the powder particle size average is defined as the particle size promoting parameter.

[0016] As a further technical solution of the present application: if the powder sphericity average is greater than the process set sphericity parameter, the powder sphericity average is defined as the sphericity inhibiting parameter, and if the powder sphericity average is less than the process set sphericity parameter, the powder sphericity average is defined as the sphericity promoting parameter.

[0017] As a further technical solution of the present application: if the powder hardness average is greater than the process set hardness parameter, the hardness average is defined as the hardness promoting parameter, and if the powder hardness average is less than the process set hardness parameter, the powder hardness average is defined as the hardness inhibiting parameter.

[0018] As a further technical solution of the present application: the determination process of the pressure promoting ratio is:

[0019] The pressure promoting parameters are input into the pressure promoting prediction model, and the pressure promoting ratio is output.

[0020] As a further technical solution of the present application: the determination process of the pressure suppression ratio is:

[0021] The pressure suppression parameter is input into the pressure suppression prediction model, and the pressure suppression ratio is output.

[0022] As a further technical solution of the present application: the acquisition process of the pressure adjustment ratio is:

[0023] The pressure promotion ratio and the pressure suppression ratio are calculated by difference, and the pressure adjustment ratio is obtained.

[0024] As a further technical solution of the present application: the determination process of the pressure value of the pressing forming is:

[0025] The pressure adjustment ratio and the process set pressure parameter are obtained, the pressure adjustment ratio and the process set pressure parameter are calculated by product, the pressure parameter adjustment value is obtained, and the process set pressure parameter and the pressure parameter adjustment value are calculated by difference, and the pressure value of the pressing forming is obtained.

[0026] As a further technical solution of the present application: the analysis process of the compactness influence ratio is:

[0027] The deviation ratio of the powder particle size average is calculated; the deviation ratio of the powder sphericity average is calculated; the deviation ratio of the powder hardness average is calculated;

[0028] The deviation ratio of the powder particle size average, the deviation ratio of the powder sphericity average and the deviation ratio of the powder hardness average are calculated to obtain the compactness influence ratio.

[0029] As a further technical solution of the present application: the determination process of the pressure time of the pressing forming is:

[0030] The compactness influence ratio and the process set pressure time parameter are calculated by product to obtain the pressure time parameter adjustment value, and the process set pressure time parameter and the pressure time parameter adjustment value are calculated by difference to obtain the pressure time of the pressing forming.

[0031] As a further technical solution of the present application: the pressure setting speed of the tungsten-copper alloy powder pressing forming is obtained through the speed calculation formula.

[0032] The present application has the following advantages:

[0033] The application realizes directional analysis of the parameters by accurately dividing the detection parameters (such as particle size, sphericity, hardness, etc.) of the copper-plated spheroidized tungsten powder before forming, and explicitly dividing the factors affecting the pressing process into pressure promoting parameters and pressure inhibiting parameters; and dynamically balancing the pressure adjustment ratio (promotion ratio / inhibition ratio) to adaptively match the pressing pressure value, and adaptively matching the pressing time through the influence relationship of the detection parameters on the density, and obtaining a reasonable pressing strategy based on the matched pressing pressure value and pressing time, thereby avoiding the problems of "over-pressing leading to mold wear" or "under-pressing leading to insufficient density" in the traditional process, so that the pressing forming process is more accurately controlled, the precision of the pressing forming is improved, and the quality of the produced tungsten-copper alloy is positively affected. BRIEF DESCRIPTION OF DRAWINGS

[0034] The application will be further described below in combination with the drawings.

[0035] Figure 1 is a flow chart of the pressing forming control in the production control process of the tungsten-copper alloy of the application;

[0036] Figure 2 is a system block diagram of the pressing forming control in the production control process of the tungsten-copper alloy of the application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the application will be clearly and completely described below in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0038] Embodiment 1

[0039] As shown in the drawings, Figure 1 The application provides a production control process of a tungsten-copper alloy, which comprises the following steps:

[0040] Plasma spheroidization treatment of tungsten powder: using an inductive plasma powder spheroidization device to perform plasma spheroidization treatment on tungsten powder to obtain spheroidized tungsten powder;

[0041] Chemical copper plating of spheroidized tungsten powder: mixing the obtained spheroidized tungsten powder with a plating solution, adjusting the pH value to 11-14, heating to 40-75℃ in a water bath, stirring the mixed solution, and performing chemical copper plating; the composition of the plating solution comprises copper sulfate, formaldehyde, potassium sodium tartrate, 2,2'-dipyridyl and methanol;

[0042] Pressing forming: pre-pressing the spheroidized tungsten powder after copper plating in a mold, and performing isostatic pressing treatment to obtain a blank;

[0043] The blank is sequentially subjected to pre-sintering and tungsten-copper infiltration process to prepare the tungsten-copper alloy;

[0044] In the preparation process of the tungsten-copper alloy, the press forming plays a crucial role, and the quality of the press forming directly affects the microstructure, physical properties and final application effect of the alloy;

[0045] For example, low-quality press forming leads to uneven mixing of powders or layered press forming, resulting in tungsten-rich and copper-rich areas after sintering; the tungsten-rich area has high brittleness, and the copper-rich area has low strength, which is prone to fracture under stress; after sintering, the alloy becomes more brittle, the tensile strength may be less than 300 MPa, and fatigue failure is prone to occur;

[0046] Therefore, controlling the press forming is an important step to improve the quality of the tungsten-copper alloy. The press forming control process includes:

[0047] Step 1: Pre-detecting the copper-plated spheroidized tungsten powder to obtain detection parameters before forming;

[0048] In some embodiments, the copper-plated spheroidized tungsten powder is not added to the forming mold, and a layered sampling method is used to collect multiple powder samples;

[0049] The powder particle size of each powder sample is obtained by using a laser diffraction method;

[0050] The powder sphericity of each powder sample is obtained by using a graphical analysis method;

[0051] The powder hardness of each powder sample is obtained by using a green compact macrohardness test method;

[0052] The density of each powder sample is obtained by using a direct volume-weight method after the copper-plated spheroidized tungsten powder is added to the forming mold;

[0053] By way of example, the layered sampling method specifically includes: the spheroidized tungsten powder is divided into three layers, i.e., upper, middle and lower layers, and five sub-samples are taken from each layer at the center and edge (1 / 10 from the wall) positions;

[0054] The principle of the laser diffraction method is to use the scattering angle of particles to the laser to deduce the particle size. The main steps are: dispersing the powder; laser irradiation and recording the scattering light intensity distribution through the detector; calculating the particle size distribution through the Mie or Fraunhofer theoretical model;

[0055] The main steps of the graphical analysis method are: dispersing the powder into a single particle stream by a vibrating feeder or air flow. Shooting: a high-speed camera (>1000 frames / s) shoots the particle projection image. Analysis: software calculates the following parameters: sphericity: Wherein, S is the sphericity, A is the projected area, and P is the perimeter.

[0056] Green compact macro hardness test method its principle: on the green body after pressing Brinell (HB), Rockwell (HR) or Shore hardness test. The steps: green compact preparation: according to the standard pressure pressing powder, ensure the surface smooth. Test conditions: Brinell hardness: load 500-3000kgf, indenter diameter 2.5-10mm. Data reading: directly through the hardness meter display or table conversion;

[0057] Step 2: according to the detection parameters before molding to promote or inhibit the use of pressure during molding, the detection parameters before molding are divided into promoting parameters and inhibiting parameters;

[0058] In some embodiments, the mean powder particle size, mean powder sphericity, mean powder hardness are compared with the process set parameters respectively;

[0059] If the mean powder particle size is greater than the process set particle size parameter, the mean powder particle size is defined as the particle size inhibition parameter, and if the mean powder particle size is less than the process set particle size parameter, the mean powder particle size is defined as the particle size promotion parameter;

[0060] Need to explain: the specific surface area of small particle size powder is large, the interparticle friction is high, the flowability is poor, and higher pressure is needed; the flowability of large particle size powder is good, and lower pressure is needed during pressing;

[0061] If the mean powder sphericity is greater than the process set sphericity parameter, the mean powder sphericity is defined as the sphericity inhibition parameter, and if the mean powder sphericity is less than the process set sphericity parameter, the mean powder sphericity is defined as the sphericity promotion parameter;

[0062] Need to explain: the interparticle friction of low sphericity powder is high, the flowability is poor, and higher pressure is needed; the flowability of high sphericity powder is good, and lower pressure is needed during pressing;

[0063] If the mean powder hardness is greater than the process set hardness parameter, the mean hardness is defined as the hardness promotion parameter, and if the mean powder hardness is less than the process set hardness parameter, the mean powder hardness is defined as the hardness inhibition parameter;

[0064] Need to explain: the deformation of high hardness powder is difficult, and higher pressure is needed; the deformation of low hardness powder is difficult, and the pressure can be reduced;

[0065] If the mean powder particle size, mean powder sphericity, mean powder hardness are equal to the process set parameters, then according to the pre-set process for pressing treatment;

[0066] all the determined particle size promotion parameters or particle size inhibition parameters, sphericity promotion parameters or sphericity inhibition parameters, hardness promotion parameters or hardness inhibition parameters are classified according to promotion or inhibition properties to obtain pressure promotion parameters and pressure inhibition parameters;

[0067] In step 3, a pressure promotion ratio is determined according to the pressure promotion parameters, a pressure inhibition ratio is determined according to the pressure inhibition parameters, and balance analysis is performed on the pressure promotion ratio and the pressure inhibition ratio to obtain a pressure adjustment ratio.

[0068] In some embodiments, the pressure promotion parameters are obtained, the pressure promotion parameters are input into a pressure promotion prediction model, and the pressure promotion ratio is output.

[0069] The pressure inhibition parameters are obtained, the pressure inhibition parameters are input into a pressure inhibition prediction model, and the pressure inhibition ratio is output.

[0070] The pressure promotion ratio and the pressure inhibition ratio are subjected to difference calculation to obtain the pressure adjustment ratio.

[0071] It should be explained that the pressure promotion ratio, the pressure inhibition ratio and the pressure adjustment ratio are all percentage values.

[0072] Firstly, the construction process of the pressure promotion prediction model is as follows:

[0073] A pressure promotion parameter data set is collected, wherein the pressure promotion parameter data set includes i groups of particle size promotion parameters, sphericity promotion parameters or hardness promotion parameters, and corresponding pressure promotion ratios, i being an integer greater than 1.

[0074] It should be noted that the pressure promotion parameter data set is obtained through historical experimental data or laboratory experiments.

[0075] The pressure promotion parameter data set is divided into a training set and a test set, a classifier is constructed, the particle size promotion parameters, the sphericity promotion parameters or the hardness promotion parameters in the training set are taken as input data, and the pressure promotion ratios in the training set are taken as output data, and a classifier meeting a preset accuracy is output as the pressure promotion prediction model. The pressure promotion prediction model is a convolutional neural network (CNN) or other suitable model.

[0076] Secondly, the construction process of the pressure inhibition prediction model is as follows:

[0077] A pressure inhibition parameter data set is collected, wherein the pressure inhibition parameter data set includes i groups of particle size inhibition parameters, sphericity inhibition parameters or hardness inhibition parameters, and corresponding pressure inhibition ratios, i being an integer greater than 1.

[0078] It should be noted that the pressure inhibition parameter data set is obtained through historical experimental data or laboratory experiments.

[0079] The pressure suppression parameter data set is divided into a training set and a test set, a classifier is constructed, the granularity suppression parameter, the sphericity suppression parameter or the hardness suppression parameter in the training set is taken as input data, the pressure suppression ratio in the training set is taken as output data, and a classifier meeting a preset accuracy is output as a pressure suppression prediction model; the pressure suppression prediction model is a convolutional neural network (CNN) or other suitable model.

[0080] Step 4: According to the obtained pressure adjustment ratio, the pressure value of the compression molding is determined, and according to the promotion parameter and the suppression parameter, the influence proportion of the density is analyzed to determine the pressure time of the compression molding. Based on the determined pressure value and pressure time of the compression molding, the compression molding strategy of the tungsten-copper alloy powder is obtained.

[0081] In some embodiments, the pressure adjustment ratio and the pressure parameter set by the process are obtained, the pressure adjustment ratio is multiplied by the pressure parameter set by the process to obtain a pressure parameter adjustment value, and the pressure parameter set by the process is subtracted from the pressure parameter adjustment value to obtain the pressure value of the compression molding.

[0082] The mean value of the powder granularity is obtained, and the deviation ratio of the mean value of the powder granularity is calculated. The calculation process of the deviation ratio of the mean value of the powder granularity is as follows: the mean value of the powder granularity is subtracted from the process-set granularity parameter, and the difference is divided by the process-set granularity parameter to obtain the deviation ratio of the mean value of the powder granularity.

[0083] The mean value of the powder sphericity is obtained, and the deviation ratio of the mean value of the powder sphericity is calculated. The calculation process of the deviation ratio of the mean value of the powder sphericity is as follows: the mean value of the powder sphericity is subtracted from the process-set sphericity parameter, and the difference is divided by the process-set sphericity parameter to obtain the deviation ratio of the mean value of the powder sphericity.

[0084] The mean value of the powder hardness is obtained, and the deviation ratio of the mean value of the powder hardness is calculated. The calculation process of the deviation ratio of the mean value of the powder hardness is as follows: the mean value of the powder hardness is subtracted from the process-set hardness parameter, and the difference is divided by the process-set hardness parameter to obtain the deviation ratio of the mean value of the powder hardness.

[0085] The deviation ratio of the mean value of the powder granularity, the deviation ratio of the mean value of the powder sphericity, and the deviation ratio of the mean value of the powder hardness are calculated by the formula K=-a1*B1+a2*B2+a3*B3 to obtain the density influence proportion; in the formula, K is the density influence proportion, a1 is the first coefficient factor, B1 is the deviation ratio of the mean value of the powder granularity, a2 is the second coefficient factor, B2 is the deviation ratio of the mean value of the powder sphericity, a3 is the third coefficient factor, and B3 is the deviation ratio of the mean value of the powder hardness; a1 is 0.5, a2 is 0.3, and a3 is 0.2.

[0086] The compaction degree influence ratio is multiplied by the process set pressure time parameter to obtain a pressure time parameter adjustment value, and the process set pressure time parameter is subtracted from the pressure time parameter adjustment value to obtain the pressure time of the compaction molding;

[0087] The pressure setting speed of the tungsten-copper alloy powder compaction molding is obtained through a speed calculation formula, which is a ratio calculation of the compaction molding pressure value and the compaction molding pressure time;

[0088] It should be explained that: the principle of the compaction degree influence ratio formula is that the filling effect of fine particles combined with the high flowability of spherical particles has a good promoting effect on the compaction degree of the tungsten-copper alloy powder during the compaction process, and the high hardness powder of fine particles generates a new surface through particle crushing under high pressure, promotes mechanical engagement, and improves the compaction degree; that is, the smaller the particle size, the larger the sphericity, and the greater the hardness, the greater the promotion of the compaction degree;

[0089] The calculation formula of the pressure setting speed is: according to the particle size, sphericity and hardness parameters of the copper-plated spheroidized tungsten powder, the influence relationship of the compaction degree during the compaction is obtained, so that the lower the compaction degree, the lower the pressure speed, and the powder particles have sufficient time to adjust the position through sliding and rotation, fill the pores, and effectively improve the molding effect.

[0090] The technical scheme of the embodiment of the present application mainly comprises: pre-detecting the copper-plated spheroidized tungsten powder to obtain molding pre-detection parameters; dividing the molding pre-detection parameters into promoting parameters and inhibiting parameters according to the promoting or inhibiting effect of the molding pre-detection parameters on the compaction molding; determining a pressure promoting ratio according to the pressure promoting parameters, determining a pressure inhibiting ratio according to the pressure inhibiting parameters, balancing the pressure promoting ratio and the pressure inhibiting ratio to obtain a pressure adjustment ratio; determining the pressure value of the compaction molding according to the obtained pressure adjustment ratio, analyzing the influence of the promoting parameters and the inhibiting parameters on the compaction degree to determine the pressure time of the compaction molding, and obtaining the compaction molding strategy of the tungsten-copper alloy powder based on the determined pressure value and pressure time of the compaction molding; the present application accurately divides the factors affecting the compaction process into pressure promoting parameters and pressure inhibiting parameters through accurate division of the molding pre-detection parameters (such as particle size, sphericity, hardness, etc.) of the copper-plated spheroidized tungsten powder, realizes directional analysis of the parameter effect, and dynamically balances the pressure adjustment ratio (promoting ratio / inhibiting ratio) to adaptively match the compaction pressure value; the influence relationship of the detection parameters on the compaction degree is also analyzed to adaptively match the compaction time, a reasonable compaction strategy is obtained based on the matched compaction pressure value and compaction time, the problems of "overpressure leading to mold wear" or "insufficient compaction degree" in the traditional process are avoided, the compaction molding process is more accurately controlled, the compaction molding precision is improved, and the quality of the produced tungsten-copper alloy is positively affected.

[0091] Embodiment 2

[0092] Referring to Figure 2 The press forming control system comprises:

[0093] The acquisition module is configured to perform pre-detection on the copper-plated spheroidized tungsten powder to obtain detection parameters before forming;

[0094] The detection parameters before forming include a mean powder particle size, a mean powder sphericity, and a mean powder hardness.

[0095] The classification module is configured to divide the detection parameters before forming into promoting parameters and inhibiting parameters according to the promoting or inhibiting effect of the pressure used in the press forming.

[0096] In some embodiments, the mean powder particle size, the mean powder sphericity, and the mean powder hardness are compared with the process-set parameters respectively to determine whether the mean powder particle size, the mean powder sphericity, and the mean powder hardness are greater than or less than the process-set parameters.

[0097] If the mean powder particle size is greater than the process-set particle size parameter, the mean powder particle size is defined as a particle size inhibiting parameter; if the mean powder particle size is less than the process-set particle size parameter, the mean powder particle size is defined as a particle size promoting parameter.

[0098] If the mean powder sphericity is greater than the process-set sphericity parameter, the mean powder sphericity is defined as a sphericity inhibiting parameter; if the mean powder sphericity is less than the process-set sphericity parameter, the mean powder sphericity is defined as a sphericity promoting parameter.

[0099] If the mean powder hardness is greater than the process-set hardness parameter, the mean hardness is defined as a hardness promoting parameter; if the mean powder hardness is less than the process-set hardness parameter, the mean powder hardness is defined as a hardness inhibiting parameter.

[0100] All of the particle size promoting parameters or particle size inhibiting parameters, the sphericity promoting parameters or sphericity inhibiting parameters, and the hardness promoting parameters or hardness inhibiting parameters are obtained, classified according to the promoting or inhibiting properties, and the pressure promoting parameters and the pressure inhibiting parameters are obtained.

[0101] The analysis module is configured to determine a pressure promoting ratio according to the pressure promoting parameters, determine a pressure inhibiting ratio according to the pressure inhibiting parameters, and perform balance analysis on the pressure promoting ratio and the pressure inhibiting ratio to obtain a pressure adjustment ratio.

[0102] In some embodiments, the pressure promoting parameters are obtained, the pressure promoting parameters are input into a pressure promoting prediction model, and the pressure promoting ratio is output.

[0103] The pressure inhibiting parameters are obtained, the pressure inhibiting parameters are input into a pressure inhibiting prediction model, and the pressure inhibiting ratio is output.

[0104] The pressure adjustment ratio is obtained by subtracting the pressure promotion ratio from the pressure suppression ratio;

[0105] The control module: according to the obtained pressure adjustment ratio, determine the pressure value of the compression molding, at the same time, according to the promotion parameter and the suppression parameter, analyze the influence ratio of the density, determine the pressure time of the compression molding, based on the determination of the pressure value and the pressure time of the compression molding, obtain the compression molding strategy of tungsten copper alloy powder;

[0106] In some embodiments, the pressure adjustment ratio and the process setting pressure parameter are obtained, the pressure adjustment ratio is multiplied by the process setting pressure parameter to obtain the pressure parameter adjustment value, and the process setting pressure parameter is subtracted from the pressure parameter adjustment value to obtain the pressure value of the compression molding;

[0107] The mean particle size of the powder is obtained, and the deviation ratio of the mean particle size of the powder is calculated. The calculation process of the deviation ratio of the mean particle size of the powder is as follows: the mean particle size of the powder is subtracted from the process setting particle size parameter, and the difference is divided by the process setting particle size parameter to obtain the deviation ratio of the mean particle size of the powder;

[0108] The mean sphericity of the powder is obtained, and the deviation ratio of the mean sphericity of the powder is calculated. The calculation process of the deviation ratio of the mean sphericity of the powder is as follows: the mean sphericity of the powder is subtracted from the process setting sphericity parameter, and the difference is divided by the process setting sphericity parameter to obtain the deviation ratio of the mean sphericity of the powder;

[0109] The mean hardness of the powder is obtained, and the deviation ratio of the mean hardness of the powder is calculated. The calculation process of the deviation ratio of the mean hardness of the powder is as follows: the mean hardness of the powder is subtracted from the process setting hardness parameter, and the difference is divided by the process setting hardness parameter to obtain the deviation ratio of the mean hardness of the powder;

[0110] The deviation ratio of the mean particle size of the powder, the deviation ratio of the mean sphericity of the powder and the deviation ratio of the mean hardness of the powder are calculated by the formula K=-a1*B1+a2*B2+a3*B3 to obtain the density influence ratio; in the formula, K is the density influence ratio, a1 is the first coefficient factor, B1 is the deviation ratio of the mean particle size of the powder, a2 is the second coefficient factor, B2 is the deviation ratio of the mean sphericity of the powder, a3 is the third coefficient factor, and B3 is the deviation ratio of the mean hardness of the powder; a1 is 0.5, a2 is 0.3, and a3 is 0.2;

[0111] The density influence ratio is multiplied by the process setting pressure time parameter to obtain the pressure time parameter adjustment value, and the process setting pressure time parameter is subtracted from the pressure time parameter adjustment value to obtain the pressure time of the compression molding;

[0112] The pressure setting speed of the tungsten-copper alloy powder pressed forming is obtained by a speed calculation formula; the speed calculation formula is that the pressure value of the pressed forming is calculated by the ratio of the pressure value of the pressed forming and the pressing time of the pressed forming to obtain the pressure setting speed;

[0113] It needs to be explained that the principle of the compactness influence ratio formula is that the filling effect of fine particles and the high fluidity of the spherical shape are combined to have a good promoting effect on the compactness of the tungsten-copper alloy powder in the pressing process, and the high hardness powder of fine particles generates a new surface by particle crushing under high pressure to promote mechanical engagement and improve the compactness; that is, the smaller the particle, the larger the spherical shape, and the greater the hardness, the more the compactness is promoted;

[0114] The calculation formula of the pressure setting speed: according to the particle size, sphericity and hardness parameters of the spheroidized tungsten powder after copper plating, the influence relationship of the compactness during pressing is obtained, so that the lower the compactness, the lower the pressing speed can be effectively reduced, and the powder particles have sufficient time to adjust the position by sliding and rotating, fill the pores, and effectively improve the forming effect.

[0115] The above has carried out the detailed description to one embodiment of the application, but the content described is only the preferred embodiment of the application, and cannot be considered to limit the implementation range of the application. Any equivalent change and improvement made according to the application scope should still belong to the patent coverage range of the application.

Claims

1. A production control process for a tungsten copper alloy, characterized by, The method comprises the following steps: The pre-detection parameters before forming are obtained by pre-detecting the copper-plated spheroidized tungsten powder; The pressure promoting or inhibiting effect during the press forming is divided into promoting parameters and inhibiting parameters according to the pre-detection parameters; The pressure promoting ratio is determined according to the pressure promoting parameters, the pressure inhibiting ratio is determined according to the pressure inhibiting parameters, the pressure promoting ratio and the pressure inhibiting ratio are balanced, and the pressure adjustment ratio is obtained; The pressure promoting ratio is determined by inputting the pressure promoting parameters into a pressure promoting prediction model and outputting the pressure promoting ratio; The pressure inhibiting ratio is determined by inputting the pressure inhibiting parameters into a pressure inhibiting prediction model and outputting the pressure inhibiting ratio; The pressure adjustment ratio is obtained by calculating the difference between the pressure promoting ratio and the pressure inhibiting ratio; The pressure value of the press forming is determined according to the obtained pressure adjustment ratio, and the pressure time of the press forming is determined according to the promoting parameters and the inhibiting parameters. The pre-detection parameters include the mean value of the powder particle size, the mean value of the powder sphericity and the mean value of the powder hardness. The specific process of dividing the pre-detection parameters into promoting parameters is as follows: All the judged particle size promoting parameters or particle size inhibiting parameters, sphericity promoting parameters or sphericity inhibiting parameters and hardness promoting parameters or hardness inhibiting parameters are obtained, and the pressure promoting parameters and the pressure inhibiting parameters are obtained by classifying according to the promoting or inhibiting properties.

2. The production control process of a tungsten-copper alloy according to claim 1, characterized by, If the mean value of the powder particle size is greater than the process set particle size parameter, the mean value of the powder particle size is defined as the particle size inhibiting parameter; if the mean value of the powder particle size is less than the process set particle size parameter, the mean value of the powder particle size is defined as the particle size promoting parameter.

3. The production control process of a tungsten-copper alloy according to claim 2, wherein If the mean value of the powder sphericity is greater than the process set sphericity parameter, the mean value of the powder sphericity is defined as the sphericity inhibiting parameter; if the mean value of the powder sphericity is less than the process set sphericity parameter, the mean value of the powder sphericity is defined as the sphericity promoting parameter. If the mean value of the powder hardness is greater than the process set hardness parameter, the mean value of the hardness is defined as the hardness promoting parameter; if the mean value of the powder hardness is less than the process set hardness parameter, the mean value of the powder hardness is defined as the hardness inhibiting parameter.

4. The production control process of a tungsten-copper alloy according to claim 3, wherein The determination process of the pressure value of the press forming is as follows:

5. The process for controlling production of tungsten-copper alloy according to claim 4, wherein The pressure adjustment ratio and the process set pressure parameter are obtained, the pressure adjustment ratio and the process set pressure parameter are multiplied to obtain a pressure parameter adjustment value, and the process set pressure parameter and the pressure parameter adjustment value are subtracted to obtain the pressure value of the press forming.

6. The production control process for a tungsten-copper alloy according to claim 5, characterized in that, The analysis process of the compactness influence ratio is as follows:

7. The production control process for a tungsten-copper alloy according to claim 1, characterized in that, The deviation ratio of the mean value of the powder particle size is calculated; the deviation ratio of the mean value of the powder sphericity is calculated; the deviation ratio of the mean value of the powder hardness is calculated; The compactness influence ratio is obtained by comprehensively calculating the deviation ratio of the mean value of the powder particle size, the deviation ratio of the mean value of the powder sphericity and the deviation ratio of the mean value of the powder hardness.

8. The production control process for a tungsten-copper alloy according to claim 7, characterized in that, The determination process of the pressure time of the press forming is as follows: ​ ​ 9. The production control process of a tungsten-copper alloy according to claim 8, wherein, ​ The compactness influence ratio is multiplied by the pressure time parameter set by the process to obtain a pressure time parameter adjustment value, and the pressure time parameter set by the process is subtracted from the pressure time parameter adjustment value to obtain the pressure time for the press forming.

10. The production control process of a tungsten-copper alloy according to claim 9, wherein, The pressure setting speed for the press forming of the tungsten-copper alloy powder is obtained through the speed calculation formula.

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