CN111139414B - Stabilizing treatment process of precipitation hardening type nickel-based high-temperature alloy - Google Patents
Stabilizing treatment process of precipitation hardening type nickel-based high-temperature alloy Download PDFInfo
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- CN111139414B CN111139414B CN201911185659.8A CN201911185659A CN111139414B CN 111139414 B CN111139414 B CN 111139414B CN 201911185659 A CN201911185659 A CN 201911185659A CN 111139414 B CN111139414 B CN 111139414B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
Abstract
The invention discloses a stabilizing treatment process of a precipitation hardening type nickel-based superalloy, which is characterized by comprising the following steps of: and putting the precipitation hardening type nickel-based high-temperature alloy in a solution treatment state into a preheated heat treatment furnace, heating to 970-1035 ℃, preserving heat for 1-3 h, and cooling to obtain the stabilized nickel-based high-temperature alloy. The invention has the advantages that the precipitation hardening type nickel-based high-temperature alloy can obtain proper carbide quantity and good appearance and distribution, so that the alloy has excellent room temperature and high temperature mechanical properties and durability after aging treatment.
Description
Technical Field
The invention relates to the technical field of heat treatment of nickel-based high-temperature alloy, in particular to a stabilizing treatment process of precipitation hardening type nickel-based high-temperature alloy.
Background
The nickel-based high-temperature alloy is also called as a hot strength alloy, a heat-resistant alloy or a superalloy, is a novel high-temperature-resistant metal material developed along with the modern aviation industry, can stably work for a long time in a high-temperature environment of 600-1100 ℃, and can bear corrosion, oxidation and complex stress at high temperature without failure. The nickel-based superalloy is largely classified into an iron-based nickel-based superalloy, a nickel-based superalloy, and a cobalt-based nickel-based superalloy by its composition, wherein the nickel-based superalloy is widely used because it has excellent structural stability, high temperature strength, and oxidation and corrosion resistance.
The nickel-based superalloy has a solid solution strengthening type alloy and a precipitation strengthening type alloy according to a strengthening mode, and the performance of the nickel-based superalloy mainly depends on the chemical composition and the structure of the nickel-based superalloy. When the alloy composition is constant, the factors affecting the alloy structure are casting, deformation and heat treatment. For precipitation hardening type nickel-based high temperature alloy, in order to obtain the best performance, the heat treatment is generally needed, and the technological process including heating temperature, holding time, holding temperature, cooling rate and the like has influence on the grain size, the shape, the size and the quantity of precipitation phase, even the state of grain boundary and the like of the alloy, and further influences the performance of the alloy. In the heat treatment process of the nickel-based high-temperature alloy, the grain boundary carbide and the gamma' strengthening phase can affect the durability, strength and plasticity of the alloy, and particularly, the carbide is distributed in the grain boundary or the crystal to improve the high-temperature working capacity of the alloy, strengthen the crystal grain and the grain boundary thereof and block the movement process of dislocation formed on the grain boundary, so that the thermal stability of the alloy is improved, and the carbide is favorable for the durability, and the form of the carbide greatly affects the plasticity of the alloy; the gamma ' phase is the most main strengthening phase in the nickel-based high-temperature alloy, the size, the shape and the distribution of the gamma ' phase obviously influence the mechanical properties of the alloy, such as durability, creep deformation and the like, the size, the shape and the distribution of the gamma ' phase can be changed by adjusting the heat treatment process, the alloy property is further improved, and the alloy potential is further exerted.
The conventional heat treatment method mainly comprises solution treatment for completely dissolving a gamma 'strengthening phase and carbides except MC type carbide in a gamma matrix and then rapidly cooling the matrix to prevent precipitation or phase transformation of alloy elements, and aging treatment for completely precipitating the gamma' strengthening phase. The stabilizing treatment refers to a heat treatment method for improving the intergranular corrosion resistance of the austenitic stainless steel containing titanium or niobium, wherein titanium or niobium elements with the carbon content being several times that of the austenitic stainless steel are added during smelting, and Cr can be formed23C6Previously, carbides of titanium or niobium, which are hardly dissolved in austenite, were preferentially formed. Therefore, the stabilizing treatment has important influence on the quantity, the shape and the distribution of carbide of the alloy, but the prior stabilizing treatment has fewer reports on the application process of the precipitation hardening type nickel-based high-temperature alloy, so that the research on the stabilizing process suitable for the precipitation hardening type nickel-based high-temperature alloy has important significance on improving the comprehensive performance of the alloy.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a stabilizing treatment process of a precipitation hardening type nickel-based high-temperature alloy, which has the advantages that the precipitation hardening type nickel-based high-temperature alloy can obtain proper carbide quantity and good appearance and distribution, so that the alloy has excellent room-temperature and high-temperature mechanical properties and durability after aging treatment.
In order to achieve the purpose, the invention provides the following technical scheme: a stabilizing treatment process of a precipitation hardening type nickel-based superalloy comprises the following steps:
and putting the precipitation hardening type nickel-based high-temperature alloy in a solution treatment state into a preheated heat treatment furnace, heating to 970-1035 ℃, preserving heat for 1-3 h, and cooling to obtain the stabilized nickel-based high-temperature alloy.
By adopting the technical scheme, the precipitation hardening type nickel-based high-temperature alloy in the solution treatment state is stabilized within the temperature range provided by the invention, the quantity of alloy grain boundary carbides is increased, the alloy grain boundary carbides are distributed in an ideal shape at the grain boundary, and then the aging treatment is carried out, so that the good matching of strength and plasticity can be realized, and the alloy can obtain excellent room-temperature and high-temperature mechanical properties and durability after aging.
Preheating a heat treatment furnace, then putting the preheated alloy into a precipitation hardening type nickel-based high-temperature alloy in a solution treatment state, adopting a heating mode of heating the alloy in a hot charging furnace and heating the alloy along with the furnace to ensure that the alloy is heated to more uniform temperature, then heating the alloy to 970-1035 ℃, then preserving heat for 1-3 h, and carrying out heat preservation treatment at the heat preservation temperature and the heat preservation time to ensure that carbide in the alloy can be fully precipitated, and the optimal matching of the quantity, distribution and appearance of the carbide can be obtained under the treatment condition, so that the finally obtained alloy has excellent room-temperature and high-temperature mechanical properties.
The invention is further configured to: the preheating temperature of the heat treatment furnace is 500-700 ℃.
The invention is further configured to: and putting the precipitation hardening type nickel-based high-temperature alloy in a solution treatment state into a preheated heat treatment furnace, and heating to 970-1035 ℃ within 1-2 h.
By adopting the technical scheme, the nickel-based high-temperature alloy is added into the preheated heat treatment furnace and then is reheated, so that on one hand, the uniform heating of the alloy is ensured, on the other hand, the cracking tendency of the alloy can be reduced, and the cracking of the alloy under the high-temperature furnace feeding is avoided.
The invention is further configured to: the stabilizing treatment process comprises the following steps:
and putting the precipitation hardening type nickel-based high-temperature alloy in a solution treatment state into a heat treatment furnace preheated to 550-650 ℃, heating to 980-1015 ℃ within 1.5-2 h, then preserving heat for 2-2.5 h, and cooling to obtain the stabilized nickel-based high-temperature alloy.
The invention is further configured to: the stabilizing treatment process comprises the following steps:
and putting the precipitation hardening type nickel-based high-temperature alloy in a solution treatment state into a heat treatment furnace preheated to 600-700 ℃, heating to 990-1025 ℃ within 1.5-2 h, then preserving heat for 1.5-2 h, and cooling to obtain the stabilized nickel-based high-temperature alloy.
The invention is further configured to: the precipitation hardening type nickel-based high-temperature alloy comprises the following components in percentage by weight: c: 0.02-0.10%, B: 0.003-0.008% and Al: 1.3-1.7%, Ti: 1.9-2.3%, Cr: 19.0 to 21.0%, Mo: 8.0-9.0%, Co: 9.0 to 11.0%, and the balance of Ni and inevitable impurity elements.
The invention is further configured to: and the cooling mode after heat preservation adopts air cooling.
The invention is further configured to: the precipitation hardening type nickel-based high-temperature alloy is any one of a cold-rolled plate, a strip, a hot-rolled plate, a hot-rolled and forged bar, a cold-drawn bar, a seamless pipe, a forged piece, a ring piece and a shell.
In conclusion, the invention has the following beneficial effects:
the stabilizing treatment process provided by the invention can be suitable for the precipitation hardening type nickel-based high-temperature alloy, and the precipitation hardening type nickel-based high-temperature alloy can obtain the appropriate number of carbides and good appearance and distribution, and the aging treatment is carried out on the basis, so that the good matching of the alloy strength and plasticity can be realized, the comprehensive performance of the alloy is effectively improved, and the alloy can obtain the advantages of excellent room-temperature and high-temperature mechanical properties and durability after the aging treatment.
Detailed Description
The present invention will be described in further detail with reference to examples.
Before the content of the invention is explained, firstly, the application of the stabilizing treatment process to the nickel-based high-temperature alloy is simply explained, firstly, the stabilizing treatment is applied to the precipitation hardening type nickel-based high-temperature alloy in the invention, aiming at increasing the number of grain boundary carbides and enabling the grain boundary carbides to be distributed in an ideal shape at the grain boundary, and the number, the shape and the distribution of the carbides are extremely sensitive to the stabilizing treatment process: when the stabilizing treatment temperature is lower, carbide is precipitated in an intermittent manner, and the alloy strength and the durability are reduced; when the temperature is higher, the matching strengthening effect of large and small gamma' phases in the alloy after the subsequent aging treatment can be weakened, the strength of the alloy is influenced, and the stability treatment temperature can influence the strength of the alloy and influence the plasticity of the alloy by influencing carbides, so that the treatment temperature in the stabilizing treatment process of the invention is obtained through a large number of experiments of an inventor in order to achieve the effect of improving the comprehensive performance of the alloy;
in addition, according to the invention, the heat treatment furnace is preheated, and then the precipitation hardening type nickel-based high-temperature alloy in the solution treatment state is added, so that the precipitation hardening type nickel-based high-temperature alloy in the solution treatment state realizes a heating mode of reaching the final heating temperature in the hot charging furnace and along with the furnace temperature rise, the alloy heating temperature is more uniform, the alloy is prevented from cracking in the high-temperature charging furnace, and the cracking tendency of the alloy is reduced;
according to the invention, the alloy is heated to 970-1035 ℃, then is subjected to heat preservation for 1-3 h, and is subjected to heat preservation treatment at the heat preservation temperature and the heat preservation time, so that carbides in the alloy can be fully precipitated, the optimal matching of the number, distribution and morphology of the carbides can be obtained under the treatment condition, and the finally obtained alloy has excellent room-temperature and high-temperature mechanical properties.
Under the condition of simultaneously ensuring the grain size, the room temperature performance and the high temperature durability of the alloy, the grain size needs to be controlled within a relatively reasonable range through stabilizing treatment, so that the temperature and the time of the stabilizing treatment need to be well controlled.
Finally, the inventor obtains the scheme provided by the invention through a large number of experiments, and the stabilizing treatment process of the precipitation hardening type nickel-based superalloy comprises the following steps:
1) heating the heat treatment furnace to 500-700 ℃;
2) loading the precipitation hardening type nickel-based high-temperature alloy in a solution treatment state into the heat treatment furnace in the step 1);
3) heating the nickel-based high-temperature alloy in the step 2) to 970-1035 ℃ after 1-2 h, timing, keeping the temperature for 1-3 h, discharging from the furnace, and air cooling to obtain the nickel-based high-temperature alloy subjected to stabilizing treatment.
Example 1
A stabilizing treatment process of a precipitation hardening type nickel-based superalloy comprises the following steps:
1) heating the heat treatment furnace to 600 ℃;
2) loading the precipitation hardening type nickel-based high-temperature alloy in a solution treatment state into the heat treatment furnace in the step 1);
3) heating the nickel-based high-temperature alloy in the step 2) to 990 ℃ after 1.5h, timing, keeping the temperature for 2h, discharging from the furnace, and air-cooling to obtain the nickel-based high-temperature alloy subjected to stabilizing treatment.
In this embodiment, the precipitation-hardened ni-based superalloy in the solution-treated state in step 2) is selected from a bar, and the specification and the composition of the bar are shown in table 1 below.
Table 1 example 1 nickel-base superalloy rod composition and gauge
Example 2
A stabilization treatment process of precipitation hardening type nickel-based superalloy is carried out according to the method in the embodiment 1, and the difference is that:
1) heating the heat treatment furnace to 650 ℃;
2) loading the precipitation hardening type nickel-based high-temperature alloy in a solution treatment state into the heat treatment furnace in the step 1);
3) heating the nickel-based high-temperature alloy in the step 2) to 1020 ℃ after 2h, timing, keeping the temperature for 1.5h, discharging from the furnace, and air-cooling to obtain the nickel-based high-temperature alloy subjected to stabilizing treatment.
Example 3
A stabilizing treatment process of a precipitation hardening type nickel-based superalloy comprises the following steps:
1) heating the heat treatment furnace to 500 ℃;
2) loading the precipitation hardening type nickel-based high-temperature alloy in a solution treatment state into the heat treatment furnace in the step 1);
3) heating the nickel-based high-temperature alloy in the step 2) to 970 ℃ after 1h, timing, preserving heat for 1h, discharging from the furnace, and air cooling to obtain the nickel-based high-temperature alloy subjected to stabilizing treatment.
Example 4
A stabilizing treatment process of a precipitation hardening type nickel-based superalloy comprises the following steps:
1) heating the heat treatment furnace to 700 ℃;
2) loading the precipitation hardening type nickel-based high-temperature alloy in a solution treatment state into the heat treatment furnace in the step 1);
3) heating the nickel-based high-temperature alloy in the step 2) to 1035 ℃ after 3 hours, timing, keeping the temperature for 3 hours, discharging from the furnace, and air cooling to obtain the nickel-based high-temperature alloy subjected to stabilizing treatment.
Example 5
A stabilizing treatment process of a precipitation hardening type nickel-based superalloy comprises the following steps:
1) heating the heat treatment furnace to 550 ℃;
2) loading the precipitation hardening type nickel-based high-temperature alloy in a solution treatment state into the heat treatment furnace in the step 1);
3) heating the nickel-based high-temperature alloy in the step 2) to 1025 ℃ after 2h, timing, preserving heat for 2.5h, discharging from the furnace, and air cooling to obtain the nickel-based high-temperature alloy subjected to stabilizing treatment.
Example 6
A stabilization treatment process of precipitation hardening type nickel-based superalloy is carried out according to the method in the embodiment 1, and the difference is that: in the step 3), the nickel-based high-temperature alloy in the step 2) is heated to 980 ℃ for 1.5h and then is subjected to heat preservation.
Example 7
A stabilization treatment process of precipitation hardening type nickel-based superalloy is carried out according to the method in the embodiment 1, and the difference is that: in the step 3), the nickel-based high-temperature alloy in the step 2) is heated to 1015 ℃ for 1.5h and then is subjected to heat preservation.
Example 8
A stabilization treatment process of precipitation hardening type nickel-based superalloy is carried out according to the method in the embodiment 1, and the difference is that: and 3) heating the nickel-based high-temperature alloy, and keeping the temperature for 1 h.
Example 9
A stabilization treatment process of precipitation hardening type nickel-based superalloy is carried out according to the method in the embodiment 1, and the difference is that: and 3) heating the nickel-based high-temperature alloy, and keeping the temperature for 3 hours.
Example 10
A stabilization treatment process of precipitation hardening type nickel-based superalloy is carried out according to the method in the embodiment 1, and the difference is that: in this embodiment, the precipitation hardening ni-based superalloy in the solution treatment state in step 2) is selected from a bar material, and the specification and the composition of the bar material are shown in table 2 below.
TABLE 2 EXAMPLE 10 Nickel base superalloy rod compositions and specifications
Example 11
A stabilization treatment process of precipitation hardening type nickel-based superalloy is carried out according to the method in the embodiment 1, and the difference is that: in this embodiment, the precipitation-hardened ni-based superalloy in the solution-treated state in step 2) is selected from a bar, and the specification and the composition of the bar are shown in table 3 below.
TABLE 3 example 11 Nickel-base superalloy rod compositions and specifications
Comparative example 1
A stabilization treatment process of precipitation hardening type nickel-based superalloy is carried out according to the method in the embodiment 1, and the difference is that: in the step 3), the nickel-based superalloy in the step 2) is heated to 950 ℃ and then is subjected to heat preservation.
Comparative example 2
A stabilization treatment process of precipitation hardening type nickel-based superalloy is carried out according to the method in the embodiment 1, and the difference is that: and 3) heating the nickel-based high-temperature alloy in the step 2) to 1045 ℃, and then preserving heat.
Comparative example 3
A stabilization treatment process of precipitation hardening type nickel-based superalloy is carried out according to the method in the embodiment 1, and the difference is that: and 3) heating the nickel-based high-temperature alloy, and keeping the temperature for 3.5 hours.
Performance detection
The stabilizing treatment process provided by the invention is one of the procedures in the heat treatment of the precipitation hardening type nickel-based high-temperature alloy, firstly, the heat treatment process of the precipitation hardening type nickel-based high-temperature alloy is simply explained, the heat treatment process of the precipitation hardening type nickel-based high-temperature alloy comprises solution treatment, the stabilizing treatment provided by the invention and aging treatment, the solution treatment is to heat the precipitation hardening type nickel-based high-temperature alloy at 1135 ℃ for 2h, then water is cooled to normal temperature to obtain the precipitation hardening type nickel-based high-temperature alloy in a solution treatment state, then the operations in examples 1-11 and comparative examples 1-3 are respectively carried out, and then the aging treatment is carried out, wherein the specific operation of the aging treatment is as follows: and (3) heating the nickel-based high-temperature alloy subjected to the stabilizing treatment at 790 ℃ for 8 hours, and then air-cooling to the normal temperature.
The solution treatment and the aging treatment are only examples for verifying the effects of the alloy after the stabilization treatment of the invention, and are not limited to the invention, and other common process parameters can be adopted for the solution treatment and the aging treatment.
Aiming at the content of the invention, firstly, the nickel-based high-temperature alloy obtained after the solution treatment, the stabilization treatment and the aging treatment are sequentially detected, in order to reflect the influence of the stabilization process provided by the invention on the final performance of the nickel-based high-temperature alloy, then the nickel-based high-temperature alloy obtained after the solution treatment and the aging treatment is sequentially detected, and the effect influence of the addition of the stabilization treatment process on the performance of the nickel-based high-temperature alloy after the heat treatment is compared.
In the following assay RmIs the tensile strength, Rp0.2The elongation strength at a non-proportional elongation of 0.2% is defined, and for the purposes of this application, it is considered to be the yield limit, and A is the elongation after fracture.
First, the room temperature tests of the nickel-base superalloys of examples 1-11 and comparative examples 1-3, the nickel-base superalloys of examples 1-15 and comparative examples 1-5 were performed using alloys of the same composition and specifications, and the solution treatment and aging treatment were performed in the same manner, so that the test data of the nickel-base superalloys of examples 1-15 and comparative examples 1-5 of the present invention after the solution treatment and aging treatment were the same.
1. After the nickel-based superalloys in examples 1-9 and comparative examples 1-3 are subjected to solution treatment, the precipitation hardening nickel-based superalloy in a solution treatment state is subjected to tensile test detection at room temperature according to GB/T228.1-2010 metal material room temperature tensile test method, and the performance detection results are shown in the following table 4.
TABLE 4 properties of the nickel-base superalloy after solution treatment
2. The nickel-based superalloys obtained by sequentially performing solution treatment and aging treatment on the nickel-based superalloys in examples 1-9 and comparative examples 1-3 are subjected to tensile test detection at room temperature, and the performance detection results are shown in the following table 5.
TABLE 5 properties of the nickel-base superalloy after solution treatment and aging treatment
3. The nickel-based superalloys obtained in examples 1-11 and comparative examples 1-3 were subjected to solution treatment, stabilization treatment and aging treatment in examples 1-9 and comparative examples 1-3 in sequence, and tensile test tests were performed at room temperature, and the performance test results are shown in table 6 below.
TABLE 6 properties of the Ni-based superalloy after solution treatment, stabilization treatment and aging treatment
As can be seen from the data in example 1 in tables 4, 5 and 6 above, the tensile strength of the nickel-based superalloy after solution treatment is 967MPa, the elongation after fracture is 40.0%, the tensile strength of the nickel-based superalloy after solution treatment and aging treatment is 989MPa, the elongation after fracture is 21.0%, the tensile strength of the nickel-based superalloy after solution treatment, stabilization treatment and aging treatment in sequence is 1021MPa, and the elongation after fracture is 28.0%, and it can be seen that the tensile strength of the nickel-based superalloy after solution treatment is low, the elongation after fracture is high, the alloy strength is low, and the plasticity is high, and that after solution treatment and aging treatment of the nickel-based superalloy, the tensile strength of the nickel-based superalloy is slightly increased but the strength of the nickel-based alloy is still low, the elongation after fracture of the nickel-based alloy is greatly decreased, the plasticity after aging treatment is low, but the operation of the stabilization treatment of the present invention, it can be seen that the tensile strength of the nickel-based high-temperature alloy is obviously improved, and meanwhile, the elongation after fracture is obviously improved compared with the alloy which is only subjected to solution treatment and aging treatment, so that the good matching of the strength and the plasticity is realized, and the comprehensive performance of the alloy is improved.
Second, the nickel-base superalloy of examples 10 to 11 was examined
Similar to the test in (a), the tensile test tests were carried out at room temperature for the alloys after the solution treatment, after the solution treatment and the aging treatment, and after the solution treatment, the stabilization treatment and the aging treatment, respectively, for the nickel-base superalloys of examples 10 and 11, and the results of the property tests are shown in the following table 7.
TABLE 7 examples 10-11 tensile test at room temperature
As can be seen from the above table, the stabilizing treatment process of the nickel-based superalloy of the present invention can be applied to nickel-based superalloys with different component specifications, and compared with a superalloy which is only subjected to solution treatment and aging treatment, the tensile strength of the nickel-based superalloy subjected to the stabilizing treatment process is significantly improved, and meanwhile, the elongation after fracture of the nickel-based superalloy is significantly improved, such that good matching of strength and plasticity is achieved, and the comprehensive performance of the alloy is improved.
Thirdly, the nickel-based superalloy in the embodiment 1 is detected at 800 ℃ and 900 ℃ respectively according to the GB/T4338-2006 method for testing metallic materials at high temperature, and the detection results are shown in the following table 8.
Table 8 example 1 high temperature tensile test
As can be seen from the above table, the nickel-base superalloy obtained by subjecting the nickel-base superalloy to solution treatment, stabilization treatment in example 1, and aging treatment, respectively, has excellent mechanical properties at high temperatures.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (7)
1. A heat treatment process of a precipitation hardening type nickel-based superalloy is characterized by comprising the following steps:
the method comprises the following steps of solution treatment, stabilizing treatment and aging treatment, wherein the stabilizing treatment comprises the following specific operations:
putting the precipitation hardening type nickel-based high-temperature alloy in a solution treatment state into a preheated heat treatment furnace, wherein the preheating temperature of the heat treatment furnace is 500-700 ℃, then heating to 970-990 ℃, preserving heat for 1-3 hours, and cooling to obtain the stabilized nickel-based high-temperature alloy;
the precipitation hardening type nickel-based high-temperature alloy comprises the following components in percentage by weight: c: 0.02-0.10%, B: 0.003-0.008% and Al: 1.3-1.7%, Ti: 1.9-2.3%, Cr: 19.0 to 21.0%, Mo: 8.0-9.0%, Co: 9.0 to 11.0 percent, and the balance of Ni and inevitable impurity elements;
the room temperature mechanical properties of the nickel-based high-temperature alloy after the solid solution treatment, the stabilization treatment and the aging treatment are as follows: the tensile strength reaches 1021MPa, the extension strength Rp0.2 reaches 637MPa, the elongation after fracture reaches 28.0%, and the mechanical properties at high temperature of 800 ℃ are as follows: the tensile strength reaches 745MPa, the elongation strength Rp0.2 reaches 500MPa, and the elongation after fracture reaches 48.5 percent.
2. The process of heat treating a precipitation hardening nickel base superalloy as claimed in claim 1, wherein the solution treatment is specifically operative to: heating the precipitation hardening type nickel-based high-temperature alloy at 1135 ℃ for 2h, and cooling to normal temperature;
the aging treatment comprises the following specific operations: and heating and preserving the heat of the stabilized nickel-based high-temperature alloy at 790 ℃ for 8h, and cooling to normal temperature.
3. The heat treatment process of a precipitation hardening type nickel-base superalloy as claimed in claim 1, wherein the precipitation hardening type nickel-base superalloy in a solution treatment state is put into a preheated heat treatment furnace and heated to 970-990 ℃ within 1-2 hours.
4. The process of claim 1, comprising the steps of:
and putting the precipitation hardening type nickel-based high-temperature alloy in a solution treatment state into a heat treatment furnace preheated to 550-650 ℃, heating to 980-990 ℃ within 1.5-2 h, then preserving heat for 2-2.5 h, and cooling to obtain the stabilized nickel-based high-temperature alloy.
5. The process of claim 1, comprising the steps of:
and putting the precipitation hardening type nickel-based high-temperature alloy in a solution treatment state into a heat treatment furnace preheated to 600-700 ℃, heating to 990 ℃ within 1.5-2 h, then preserving heat for 1.5-2 h, and cooling to obtain the stabilized nickel-based high-temperature alloy.
6. The heat treatment process of claim 1, wherein the cooling after the heat preservation is air cooling.
7. The heat treatment process of a precipitation hardening ni-based superalloy as claimed in claim 1, wherein the precipitation hardening ni-based superalloy is selected from any one of cold rolled sheet, strip, hot rolled sheet, hot rolled and forged bar, cold drawn bar, seamless tube, forging, ring, and shell.
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