CN113005329A - High-strength and high-toughness alpha + beta type titanium alloy in WSTi53311 and ingot casting preparation method thereof - Google Patents
High-strength and high-toughness alpha + beta type titanium alloy in WSTi53311 and ingot casting preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of alloys, and relates to a high-strength and high-toughness alpha + beta type titanium alloy in WSTi53311, which comprises the following components in percentage by weight: 5.5% -6.5%; mo: 2.5% -3.5%; cr: 2.5% -3.5%; zr: 1.0% -2.0%; nb: 0.5 to 1.5 percent; si: 0.05 percent to 0.25 percent; o: 0.08 to 0.15 percent; the balance of Ti and inevitable impurities; the total amount of impurity elements is less than or equal to 0.03 percent, and the sum of the weight percentages of the components is 100 percent. The invention also discloses a preparation method of the titanium alloy ingot. The high-strength alpha + beta type titanium alloy has high component uniformity, breaks through the chemical component uniformity control technology of industrial ton-grade large-scale cast ingots, and avoids the metallurgical defects of non-melting blocks, beta spots and the like formed by high-melting-point molybdenum, chromium and niobium elements.
Description
Technical Field
The invention belongs to the technical field of titanium alloy processing, and particularly relates to a high-strength and high-toughness alpha + beta type titanium alloy in WSTi53311 and a preparation method of an ingot thereof.
Background
The WSTi53311 alloy has the nominal component of Ti-5Al-3Mo-3Cr-1Zr-1Nb, is a 1100 MPa-level medium-high-strength high-toughness alpha + beta type titanium alloy, belongs to a Ti-Al-Mo-Cr series alpha + beta type titanium alloy with the same alloy of TC6 and the like, increases the content of slow eutectoid elements Mo and Cr, is beneficial to the strength and toughness of a material, introduces the beta eutectoid element Nb of Ti, and improves the room temperature plasticity, the hot workability and the welding performance of the material. In addition, the alloy has small content of impurity elements in gaps, improves the damage tolerance performance of the material, and can meet the design requirement of long service life of structural parts. The WSTi53311 alloy has higher room temperature strength, room temperature plasticity, impact toughness, fracture toughness and fatigue performance, and is a titanium alloy material with excellent comprehensive performance which can be used for aerospace structural members and engines.
In order to obtain the comprehensive matching of medium-high strength, toughness and fatigue performance, molybdenum, chromium, aluminum and a small amount of zirconium and niobium are added into the WSTi53311 alloy. The above alloy elements will volatilize to different degrees in the melting process, and finally determine the chemical composition of the titanium alloy. Compared with other elements, under 2200K, the saturated vapor pressure of aluminum element is about 240Pa, the saturated vapor pressure of molybdenum element is about 6.68 multiplied by 10 < -4 > Pa, the melting point of titanium alloy is about 1900K, the melting of metal elements such as molybdenum, chromium and the like is very high, in order to ensure that the chemical components of the ingot casting are accurately controlled while the full alloying is ensured, on one hand, the adding mode of the alloy elements needs to be designed, on the other hand, the vacuum consumable melting mode needs to be adopted, and the melting process is optimized, so that the high-purity and high-uniformity industrial grade WSTi53311 titanium alloy ingot casting is finally obtained.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-strength and high-toughness titanium alloy in WSTi53311 and a preparation method thereof, which solve the problem of controlling the component uniformity of easily segregated elements of molybdenum and chromium and high melting point elements of molybdenum, chromium and niobium in the WSTi53311 alloy.
In order to achieve the purpose, the invention provides the following technical scheme:
on one hand, the invention provides a high-strength and high-toughness titanium alloy in WSTi53311, which comprises the following elements in percentage by weight: mo: 2.5% -3.5%, Cr: 2.5% -3.5%, Zr: 1.0% -2.0%, Nb: 0.5% -1.5%, Si: 0.05-0.25%, O: 0.08 to 0.15 percent of the total content of Ti and inevitable impurities, the total content of the impurity elements is not more than 0.30 percent, and the sum of the weight percentages of the components is 100 percent.
Furthermore, the Mo, Cr, Nb, Al and Si elements are derived from binary master alloy. The O element is taken from raw materials, such as titanium sponge. When the raw materials with O element can not meet the proportion, TiO is used2Adjusting the content of oxygen element
Further, the Mo is added by adopting an AlMo alloy, the Cr is added by adopting an AlCr alloy, the Nb is added by adopting an NbTi alloy, and the Si is added by adopting a TiSi alloy. The alloy mode is used for reducing the segregation risk of high-melting-point alloys such as Mo, Cr, Nb and the like.
Further, Zr is selected from 0.83 mm-12.7 mm particle sponge zirconium, and Ti is selected from 0.83 mm-12.7 mm particle sponge titanium.
On the other hand, the invention also provides a preparation method of the high-strength high-toughness titanium alloy ingot in WSTi53311, which comprises the following steps:
step 1), preparing an electrode:
the materials are prepared according to the following weight percentages: al: 5.5% -6.5%, Mo: 2.5% -3.5%, Cr: 2.5% -3.5%, Zr: 1.0% -2.0%, Nb: 0.5% -1.5%, Si: 0.05-0.25%, O: 0.08 to 0.15 percent of Ti and inevitable impurities as the rest, wherein the total amount of the impurity elements is not more than 0.30 percent, and the sum of the weight percentages of the components is 100 percent; carrying out single-block electrode mixing on the mixture, and pressing into an electrode block;
step 2), welding a consumable electrode:
clamping the electrode block obtained in the step 1) by using a clamp, and welding the electrode block into a consumable electrode by using a non-tungsten argon protection plasma box;
and 3) carrying out three times of vacuum melting on the consumable electrode obtained in the step 2) by adopting a vacuum consumable electric arc furnace to obtain a WSTi53311 titanium alloy ingot.
Further, the electrode block in the step 1) is pressed into an electrode by adopting a large hydraulic press.
Further, the welding current of the electrode block in the step 2) is 220A-400A, and the welding voltage is 30V-45V.
Further, the first melting parameters of the three times of vacuum melting in the step 3) are as follows: the specification of the crucible is phi 160 mm-phi 560mm, the vacuum degree before melting is less than or equal to 2.0Pa, the air leakage rate is less than or equal to 1.0Pa/min, the melting voltage is 30V-40V, the melting current is 8 kA-24 kA, the arc stabilizing current is 3.0A-14.0A, and the cooling time is 6 h-10 h.
Further, the parameters of the third vacuum melting and the second melting in the step 3) are as follows: the specification of the crucible is phi 220 mm-phi 640mm, the vacuum degree before melting is less than or equal to 1.8Pa, the gas leakage rate is less than or equal to 0.8Pa/min, the melting voltage is 34V-40V, the melting current is 10 kA-28 kA, the arc stabilizing current is 5.0A-16.0A, and the cooling time is 6 h-12 h.
Further, the third vacuum melting parameters in the step 3) are as follows: the specification of the crucible is phi 280 mm-phi 850mm, the vacuum degree before melting is less than or equal to 1.8Pa, the air leakage rate is less than or equal to 0.5Pa/min, the melting voltage is 34V-40V, the melting current is 5 kA-28 kA, the arc stabilizing current is 8.0A-18.0A, and the cooling time is 6 h-12 h.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
according to the high-strength and high-toughness titanium alloy in the WSTi53311, the introduction of Nb element enables the difference between the alpha elastic modulus and the beta elastic modulus in the WSTi53311 alloy to be small and the modulus matching degree to be high by adopting the granular Nb47Ti, AlMo, AlCr and TiSi binary intermediate alloy, and the small-grain sponge titanium and sponge zirconium with the grain size of 0.83-12.7 mm, so that the toughness and plasticity level of the alloy is improved; the problem of uniformity of the material distribution is effectively solved by screening the material of the master alloy and controlling the granularity, the longitudinal components of the ingot obtained by the method can be effectively controlled within 2500ppm, and the beta spot of the bar is detected at 30 ℃ below the phase transition point, so that no metallurgical defect is found.
According to the preparation method of the high-strength and high-toughness titanium alloy in the WSTi53311, a single electrode is adopted for mixing materials before electrode pressing, and the materials are fully and uniformly mixed; the electrode completes the whole electrode welding process in the non-tungsten electrode vacuum plasma welding box, thereby avoiding the pollution of tungsten or other impurities and the oxidation of the electrode; the vacuum consumable electrode arc furnace is adopted for carrying out three times of smelting, parameters such as vacuum degree, gas leakage rate and the like are strictly controlled in the smelting process, so that the transverse and longitudinal uniformity of the components of the whole ingot is improved, and the impurity content is reduced. The preparation method successfully breaks through the chemical component uniformity control technology of industrial large-scale ingots of 1-6 tons, controls the burning loss of aluminum elements in the smelting process, avoids the metallurgical defects of refractory molybdenum, chromium and niobium elements such as unfixed blocks and the like, effectively solves the problems of component segregation, content control of impurities and interstitial elements, batch stability and the like, and is suitable for industrial production of WSTi53311 titanium alloy ingots with the specification of phi 280-phi 850 mm.
Drawings
FIG. 1 is a schematic view showing the longitudinal 5-point sampling of a titanium alloy ingot obtained by the method of the present invention.
FIG. 2 is a schematic view showing the transverse 9-point sampling of a titanium alloy ingot obtained by the method of the present invention.
FIG. 3 is a chemical composition diagram of 5 points in the longitudinal direction of an ingot obtained in example 3 of the present invention.
FIG. 4 is a distribution diagram of the transverse 9-point Al element content of the ingot obtained in example 3 of the present invention.
FIG. 5 is a distribution diagram of the transverse 9-point Mo element content of the ingot obtained in example 3 of the present invention.
FIG. 6 is a diagram showing the distribution of Cr element content at 9 points in the transverse direction of an ingot obtained in example 3 of the present invention.
FIG. 7 is a distribution diagram of Zr element content at 9 points in the transverse direction of an ingot obtained in example 3 of the present invention.
FIG. 8 is a transverse 9-point Nb content distribution diagram of an ingot obtained in example 3 of the present invention.
In the figure, 1 is an ingot, 2 is a longitudinal sampling point, and 3 is a transverse sampling point.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Example 1:
the invention relates to a high-strength and high-toughness alpha + beta type titanium alloy in WSTi53311, which comprises the following elements in percentage by weight: al: 5.5% -6.5%, Mo: 2.5% -3.5%, Cr: 2.5% -3.5%, Zr: 1.0% -2.0%, Nb: 0.5% -1.5%, Si: 0.05-0.25%, O: 0.08 to 0.15 percent of the total content of Ti and inevitable impurities, the total content of the impurity elements is not more than 0.30 percent, and the sum of the weight percentages of the components is 100 percent.
The preparation method of the high-strength and high-toughness alpha + beta type titanium alloy in WSTi53311 specifically comprises the following steps:
step 1), preparing an electrode:
preparing the following components in percentage by weight: al: 5.5% -6.5%, Mo: 2.5% -3.5%, Cr: 2.5% -3.5%, Zr: 1.0% -2.0%, Nb: 0.5% -1.5%, Si: 0.05-0.25%, O: 0.08 to 0.15 percent of the total content of Ti and inevitable impurities, the total content of the impurity elements is not more than 0.30 percent, and the sum of the weight percentages of the components is 100 percent. Wherein, the alloy proportion of AlMo, AlCr, Nb47Ti and TiSi is calculated according to the percentage content of Mo, Cr, Nb and Si, and the granular AlMo binary alloy, AlCr binary alloy, Nb47Ti binary alloy and TiSi binary alloy are respectively weighed and mixed with small-grain sponge titanium and sponge zirconium with the granularity of 0.83 mm-12.7 mm to form a monolithic electrode, and the monolithic electrode is pressed into an electrode block by a large hydraulic press. The O element in the electrode block is made of raw materials such as titanium sponge. When the raw materials with O element can not meet the proportion, TiO is used2Adjusting the content of oxygen element.
Step 2), welding a consumable electrode:
clamping the electrode block obtained in the step 1) by using a clamp, and welding the electrode block into a consumable electrode by using a non-tungsten argon protection plasma box;
and 3), carrying out three times of vacuum melting on the consumable electrode obtained in the step 2) by adopting a vacuum consumable electrode arc furnace:
smelting for the first time: placing the consumable electrode obtained in the step 2) in a crucible with the specification of phi 160 mm-phi 560mm, wherein the vacuum degree before melting is less than or equal to 2.0Pa, the gas leakage rate is less than or equal to 1.0Pa/min, the melting voltage is 30V-40V, the melting current is 8 kA-24 kA, the arc stabilizing current is 3.0A-14.0A, and the cooling time is 6 h-10 h.
Smelting for the second time: the specification of the crucible is phi 220 mm-phi 640mm, the vacuum degree before melting is less than or equal to 1.8Pa, the gas leakage rate is less than or equal to 0.8Pa/min, the melting voltage is 34V-40V, the melting current is 10 kA-28 kA, the arc stabilizing current is 5.0A-16.0A, and the cooling time is 6 h-12 h.
Smelting for the third time: the specification of the crucible is phi 280 mm-phi 850mm, the vacuum degree before melting is less than or equal to 1.8Pa, the gas leakage rate is less than or equal to 0.5Pa/min, the melting voltage is 34V-40V, the melting current is 5 kA-28 kA, the arc stabilizing current is 8.0A-18.0A, and the cooling time is 6 h-12 h, thus obtaining the WSTi53311 titanium alloy ingot.
The invention adopts the intermediate alloy, the small-particle titanium sponge and the small-particle zirconium sponge with the particle size of 0.83 mm-12.7 mm, strictly controls the oxygen content and the content of other impurity elements in the raw materials, adopts a single electrode to mix materials before the electrode is pressed, and fully and uniformly mixes the materials; the electrode completes the whole electrode welding process in the non-tungsten electrode vacuum plasma welding box, thereby avoiding the pollution of tungsten or other impurities and the oxidation of the electrode; the vacuum consumable electrode arc furnace is adopted for carrying out three times of smelting, parameters such as vacuum degree, gas leakage rate and the like are strictly controlled in the smelting process, so that the transverse and longitudinal uniformity of the components of the whole ingot is improved, and the impurity content is reduced. The chemical composition uniformity control technology of industrial large-scale ingots of 1-6 tons is successfully broken through, the burning loss of aluminum elements in the smelting process is reduced, and the metallurgical defects of non-melting blocks formed by high-melting-point molybdenum, chromium and niobium elements and the like are avoided. Effectively solves the problems of component segregation, content control of impurities and interstitial elements, batch stability and the like, and is suitable for industrial production of WSTi53311 titanium alloy ingots with the specification of phi 280 mm-phi 850 mm.
Example 2:
the invention also provides a preparation method of the high-strength high-toughness alpha + beta type titanium alloy ingot in WSTi53311, which comprises the following steps:
step 1), preparing materials according to the weight percentage of each element: al: 5.5%, Mo: 2.5%, Cr: 2.5%, Zr: 1.0%, Nb: 0.5%, Si: 0.05%, O: 0.08 percent of Ti and inevitable impurities as the rest, wherein the total amount of the impurity elements is not more than 0.30 percent, and the sum of the weight percentages of the components is 100 percent. Wherein, the alloy proportion of AlMo, AlCr, Nb47Ti and TiSi is calculated according to the percentage content of Mo, Cr, Nb and Si, and the granular AlMo binary alloy, AlCr binary alloy, Nb47Ti binary alloy and TiSi binary alloy are respectively weighed and mixed with small-grain sponge titanium and sponge zirconium with the granularity of 0.83 mm-12.7 mm to form a monolithic electrode, and the monolithic electrode is pressed into an electrode block by a large hydraulic press. The O element in the electrode block is made of raw materials such as titanium sponge. When the raw materials with O element can not meet the proportion, TiO is used2Adjusting the content of oxygen element
Step 2), clamping the electrode block obtained in the step 1) by using a clamp, welding the electrode block into a consumable electrode by using a non-tungsten argon protection plasma box, wherein the welding current is 220A, the welding voltage is 30V, and a welding spot is required to be silver gray or light yellow, so that metallurgical defects such as welding spot oxidation, high-density inclusion and the like are prevented;
step 3), carrying out three times of vacuum melting on the consumable electrode obtained in the step 2) by adopting a vacuum consumable electrode electric arc furnace to obtain a phi 280mm ingot, wherein the specific melting parameters are as follows:
primary smelting: the specification of the crucible is phi 160mm, the vacuum degree before melting is less than or equal to 2.0Pa, the gas leakage rate is less than or equal to 1.0Pa/min, the melting voltage is 30V, the melting current is 8kA, the arc stabilizing current is 3.0A, and the cooling time is 6 h.
Smelting for the second time: the specification of the crucible is phi 220mm, the vacuum degree before melting is less than or equal to 1.8Pa, the gas leakage rate is less than or equal to 0.8Pa/min, the melting voltage is 34V, the melting current is 10kA, the arc stabilizing current is alternating current at 5.0A, and the cooling time is 6 h.
Smelting for the third time: the specification of the crucible is phi 280mm, the vacuum degree before melting is less than or equal to 1.8Pa, the gas leakage rate is less than or equal to 0.5Pa/min, the melting voltage is 34V, the melting current is 5kA, the arc stabilizing current is 8.0A, and the cooling time is 6h, thus obtaining the WSTi53311 titanium alloy ingot with the specification of phi 280 mm.
Example 3:
step 1), the weight percentages of the elements are as follows: al: 6.0%, Mo: 3.0%, Cr: 3.0%, Zr: 1.5%, Nb: 1.0%, Si: 0.15%, O: 0.12 percent, the balance being Ti and inevitable impurities, the total amount of the impurity elements not exceeding 0.30 percent, the sum of the weight percentages of the above components being 100 percent, wherein the alloy ratios of AlMo, AlCr, Nb47Ti and TiSi are calculated according to the percentage contents of Mo, Cr, Nb and Si, and granular AlMo binary alloy, AlCr binary alloy, Nb47Ti binary alloy and TiSi binary alloy are respectively weighed, and are mixed with small-grain titanium sponge and zirconium sponge with the granularity of 0.83 mm-12.7 mm to form a monolithic electrode, and are pressed into an electrode block by a large hydraulic press, and the O element in the electrode block is carried by raw materials, such as titanium sponge. When the raw materials with O element can not meet the proportion, TiO is used2Adjusting the content of oxygen element.
Step 2), clamping the electrode block obtained in the step 1) by using a clamp, welding the electrode block into a consumable electrode by using a non-tungsten argon protection plasma box, wherein the welding current is 300A, the welding voltage is 38V, and the welding spot is required to be silver gray or light yellow, so that the metallurgical defects of welding spot oxidation, high-density inclusion and the like are prevented;
step 3), carrying out three times of vacuum melting on the consumable electrode obtained in the step 2) by adopting a vacuum consumable electrode electric arc furnace to obtain a cast ingot with the diameter of 640mm, wherein the specific melting parameters are as follows:
primary smelting: the specification of the crucible is phi 440mm, the vacuum degree before melting is less than or equal to 2.0Pa, the gas leakage rate is less than or equal to 1.0Pa/min, the melting voltage is 35V, the melting current is 16kA, the arc stabilizing current is 9.0A, and the cooling time is 8 h.
Smelting for the second time: the specification of the crucible is phi 560mm, the vacuum degree before melting is less than or equal to 1.8Pa, the gas leakage rate is less than or equal to 0.8Pa/min, the melting voltage is 36V, the melting current is 18kA, the arc stabilizing current is 10.0A, and the cooling time is 8 h.
Smelting for the third time: the specification of the crucible is phi 640mm, the vacuum degree before melting is less than or equal to 1.8Pa, the gas leakage rate is less than or equal to 0.5Pa/min, the melting voltage is 36V, the melting current is 18kA, the arc stabilizing current is 12.0A, and the cooling time is 8h, thus obtaining the WSTi53311 titanium alloy ingot with the specification of phi 640 mm.
Example 4:
step 1), according to eachThe weight percentages of the elements are as follows: al: 6.5%, Mo: 3.5%, Cr: 3.5%, Zr: 2.0%, Nb: 1.5%, Si: 0.25%, O: 0.15 percent, the balance being Ti and inevitable impurities, the total amount of the impurity elements not exceeding 0.30 percent, the sum of the weight percentages of the above components being 100 percent, wherein the alloy ratios of AlMo, AlCr, Nb47Ti and TiSi are calculated according to the percentage contents of Mo, Cr, Nb and Si, and granular AlMo binary alloy, AlCr binary alloy, Nb47Ti binary alloy and TiSi binary alloy are respectively weighed, and are mixed with small-granular sponge titanium and sponge zirconium with the granularity of 0.83 mm-12.7 mm to form a monolithic electrode, and are pressed into an electrode block by a large hydraulic press, the O element in the electrode block is carried by the raw material, such as sponge titanium, when the O element carried by the raw material cannot meet the ratio, TiO is used for pressing into the electrode block2Adjusting the content of oxygen element.
Step 2), clamping the electrode block obtained in the step 1) by using a clamp, welding the electrode block into a consumable electrode by using a non-tungsten argon protection plasma box, wherein the welding current is 400A, the welding voltage is 45V, and the welding spot is required to be silver gray or light yellow, so that the metallurgical defects of welding spot oxidation, high-density inclusion and the like are prevented;
step 3), carrying out three times of vacuum melting on the consumable electrode obtained in the step 2) by adopting a vacuum consumable electrode electric arc furnace to obtain a cast ingot with the diameter of 640mm, wherein the specific melting parameters are as follows:
primary smelting: the specification of the crucible is phi 560mm, the vacuum degree before melting is less than or equal to 2.0Pa, the gas leakage rate is less than or equal to 1.0Pa/min, the melting voltage is 40V, the melting current is 24kA, the arc stabilizing current is 14.0A, and the cooling time is 10 h.
Smelting for the second time: the specification of the crucible is phi 640mm, the vacuum degree before melting is less than or equal to 1.8Pa, the gas leakage rate is less than or equal to 0.8Pa/min, the melting voltage is 40V, the melting current is 28kA, the arc stabilizing current is alternating current 16.0A, and the cooling time is 12 h.
Smelting for the third time: the specification of the crucible is phi 850mm, the vacuum degree before melting is less than or equal to 1.8Pa, the gas leakage rate is less than or equal to 0.5Pa/min, the melting voltage is 40V, the melting current is 28kA, the arc stabilizing current is 18.0A, and the cooling time is 12h, thus obtaining the WSTi53311 titanium alloy ingot with the specification of phi 850 mm.
According to the drawings of fig. 1 and 2, sampling and chemical composition detection are carried out on 5 points of the longitudinal head, the upper, the middle, the lower and the tail and 9 points of the cross section of the WSTi53311 titanium alloy of which the specifications are phi 280mm, phi 640mm and phi 850mm prepared in the embodiment, namely 1 ton, 3 ton and 6 ton industrial large-scale cast ingots, and data show that the element composition of each part of the cast ingot is uniformly distributed and the stability among batches is good; the chemical composition analysis results of 5 longitudinal points and 9 transverse cross sections of the WSTi53311 titanium alloy ingot with the phi 850mm specification obtained in example 2 are respectively shown in FIGS. 3 and 4 (the ordinate is the weight percentage of elements), wherein the chemical composition of the 5 longitudinal points is listed in Table 1, and the content distribution of different sampling points of each element is respectively shown in FIGS. 4-8.
TABLE 1 chemical composition List of WSTi53311 titanium alloy ingot of phi 850mm specification at 5 points in longitudinal direction
| Chemical elements wt% | Al | Mo | Cr | Zr | Nb | Si | O |
| Head with a rotatable shaft | 6.35 | 3.36 | 3.38 | 1.79 | 1.40 | 0.24 | 0.141 |
| On the upper part | 6.31 | 3.41 | 3.44 | 1.81 | 1.40 | 0.24 | 0.146 |
| In | 6.34 | 3.44 | 3.40 | 1.81 | 1.41 | 0.24 | 0.145 |
| Lower part | 6.31 | 3.40 | 3.40 | 1.80 | 1.42 | 0.24 | 0.144 |
| Tail | 6.36 | 3.41 | 3.39 | 1.78 | 1.38 | 0.24 | 0.147 |
According to the test results, the WSTi53311 titanium alloy industrial-grade large ingot produced by the smelting process technology has uniform components and good batch stability, and is suitable for industrial production.
Claims (9)
1. The high-strength high-toughness alpha + beta type titanium alloy in WSTi53311 is characterized in that: the titanium alloy comprises the following components in percentage by weight: al: 5.5% -6.5%; mo: 2.5% -3.5%; cr: 2.5% -3.5%; zr: 1.0% -2.0%; nb: 0.5 to 1.5 percent; si: 0.05 percent to 0.25 percent; o: 0.08 to 0.15 percent; the balance of Ti and inevitable impurities; the total amount of impurity elements is less than or equal to 0.03 percent, and the sum of the weight percentages of the components is 100 percent.
2. The high-strength high-toughness alpha + beta type titanium alloy in WSTi53311 as claimed in claim 1, wherein said Al, Mo, Cr, Nb and Si elements are respectively derived from binary master alloy, and O element is self-contained in the raw material.
3. The high-strength high-toughness alpha + beta type titanium alloy in WSTi53311 as claimed in claim 2, wherein Mo is added by AlMo alloy, Cr is added by AlCr alloy, Nb is added by NbTi alloy, Si is added by TiSi alloy, Zr is sponge zirconium in particle size of 0.83-12.7 mm, and Ti is sponge titanium in particle size of 0.83-12.7 mm.
4. The preparation method of the WSTi53311 high-strength high-toughness alpha + beta type titanium alloy ingot is characterized by comprising the following steps:
step 1), preparing an electrode:
the materials are prepared according to the following weight percentages: al: 5.5% -6.5%, Mo: 2.5% -3.5%, Cr: 2.5% -3.5%, Zr: 1.0% -2.0%, Nb: 0.5% -1.5%, Si: 0.05-0.25%, O: 0.08 to 0.15 percent of Ti and inevitable impurities as the rest, wherein the total amount of the impurity elements is not more than 0.30 percent, and the sum of the weight percentages of the components is 100 percent; carrying out single-block electrode mixing on the mixture, and pressing into an electrode block;
step 2), welding the electrode block into a consumable electrode:
and 3) carrying out vacuum consumable arc melting on the consumable electrode for multiple times to obtain a WSTi53311 titanium alloy ingot.
5. The method for preparing the high-strength high-toughness alpha + beta type titanium alloy ingot in the WSTi53311 as claimed in claim 4, wherein in the step 2), the electrode block obtained in the step 1) is clamped by a clamp, and a non-tungsten electrode argon protection plasma box is adopted to weld the electrode block group into a consumable electrode.
6. The method for preparing the high-strength high-toughness alpha + beta type titanium alloy ingot in the WSTi53311 as claimed in claim 5, wherein the welding current of the electrode block in the step 2) is 220A-400A, and the welding voltage is 30V-45V.
7. The method for preparing the high-strength high-toughness alpha + beta type titanium alloy ingot in the WSTi53311 as claimed in claim 4, wherein the parameters of the first vacuum consumable arc melting in the step 3) are as follows: the specification of the crucible is phi 160 mm-phi 560mm, the vacuum degree before melting is less than or equal to 2.0Pa, the air leakage rate is less than or equal to 1.0Pa/min, the melting voltage is 30V-40V, the melting current is 8 kA-24 kA, the arc stabilizing current is 3.0A-14.0A, and the cooling time is 6 h-10 h.
8. The method for preparing the high-strength high-toughness alpha + beta type titanium alloy ingot in the WSTi53311 as claimed in claim 4, wherein the parameters of the second vacuum consumable arc melting in the step 3) are as follows: the specification of the crucible is phi 220 mm-phi 640mm, the vacuum degree before melting is less than or equal to 1.8Pa, the gas leakage rate is less than or equal to 0.8Pa/min, the melting voltage is 34V-40V, the melting current is 10 kA-28 kA, the arc stabilizing current is 5.0A-16.0A, and the cooling time is 6 h-12 h.
9. The method for preparing the high-strength high-toughness alpha + beta type titanium alloy ingot in the WSTi53311 as claimed in claim 4, wherein the parameters of the third vacuum consumable arc melting in the step 3) are as follows: the specification of the crucible is phi 280 mm-phi 850mm, the vacuum degree before melting is less than or equal to 1.8Pa, the air leakage rate is less than or equal to 0.5Pa/min, the melting voltage is 34V-40V, the melting current is 5 kA-28 kA, the arc stabilizing current is 8.0A-18.0A, and the cooling time is 6 h-12 h.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115386753A (en) * | 2022-08-17 | 2022-11-25 | 西部超导材料科技股份有限公司 | Preparation method of WSTi6421 titanium alloy |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006219734A (en) * | 2005-02-14 | 2006-08-24 | Kobe Steel Ltd | ULTRAHIGH-STRENGTH alpha-beta TYPE TITANIUM ALLOY HAVING ADEQUATE DUCTILITY |
| JP2012149291A (en) * | 2011-01-18 | 2012-08-09 | Nippon Steel Corp | α+β TYPE TITANIUM ALLOY MEMBER HAVING HIGH STRENGTH AND LOW YOUNG'S MODULUS, AND METHOD FOR PRODUCING THE SAME |
| CN105838922A (en) * | 2016-05-25 | 2016-08-10 | 西部超导材料科技股份有限公司 | Heat strong titanium alloy ingot for aviation and manufacturing method for heat strong titanium alloy |
| CN107523718A (en) * | 2017-07-13 | 2017-12-29 | 西部超导材料科技股份有限公司 | A kind of aerospace component 1500MPa level titanium alloys and preparation method thereof |
| CN110438368A (en) * | 2019-07-31 | 2019-11-12 | 西部超导材料科技股份有限公司 | A kind of super large-scale Ti80 alloy cast ingot and preparation method thereof |
-
2021
- 2021-03-22 CN CN202110299986.7A patent/CN113005329A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006219734A (en) * | 2005-02-14 | 2006-08-24 | Kobe Steel Ltd | ULTRAHIGH-STRENGTH alpha-beta TYPE TITANIUM ALLOY HAVING ADEQUATE DUCTILITY |
| JP2012149291A (en) * | 2011-01-18 | 2012-08-09 | Nippon Steel Corp | α+β TYPE TITANIUM ALLOY MEMBER HAVING HIGH STRENGTH AND LOW YOUNG'S MODULUS, AND METHOD FOR PRODUCING THE SAME |
| CN105838922A (en) * | 2016-05-25 | 2016-08-10 | 西部超导材料科技股份有限公司 | Heat strong titanium alloy ingot for aviation and manufacturing method for heat strong titanium alloy |
| CN107523718A (en) * | 2017-07-13 | 2017-12-29 | 西部超导材料科技股份有限公司 | A kind of aerospace component 1500MPa level titanium alloys and preparation method thereof |
| CN110438368A (en) * | 2019-07-31 | 2019-11-12 | 西部超导材料科技股份有限公司 | A kind of super large-scale Ti80 alloy cast ingot and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘锦云: "《工程材料学》", 30 November 2016, 哈尔滨工业大学出版社, pages: 256 - 257 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115386753A (en) * | 2022-08-17 | 2022-11-25 | 西部超导材料科技股份有限公司 | Preparation method of WSTi6421 titanium alloy |
| CN115386753B (en) * | 2022-08-17 | 2023-08-15 | 西部超导材料科技股份有限公司 | Preparation method of WSTi6421 titanium alloy |
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