CN107058803A - It is a kind of to improve the method for casting ZTA29 alloy-steel casting microstructures - Google Patents
It is a kind of to improve the method for casting ZTA29 alloy-steel casting microstructures Download PDFInfo
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- CN107058803A CN107058803A CN201710256353.1A CN201710256353A CN107058803A CN 107058803 A CN107058803 A CN 107058803A CN 201710256353 A CN201710256353 A CN 201710256353A CN 107058803 A CN107058803 A CN 107058803A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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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
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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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
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
- C22F1/183—High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
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Abstract
The present invention is a kind of method for improving and casting ZTA29 alloy-steel casting microstructures, technical solution of the present invention is simultaneously using high temperature insostatic pressing (HIP), hydrogenation process to TA29 alloy-steel casting microstructure refining effects, repair microstructure Hole, refine microcosmic crystal grain, the mechanical property (fatigue strength etc.) of casting is improved, wherein room temperature tensile intensity, yield strength improve about 8%, Testing Tensile Strength at Elevated Temperature, yield strength improve about 10%, are that TA29 alloy-steel castings are laid a good foundation in the further application of Aeronautics and Astronautics engine art.
Description
Technical field
The present invention is a kind of method for improving and casting ZTA29 alloy-steel casting microstructures, belongs to technical field of heat treatment, is
A kind of high temperature insostatic pressing (HIP)-hydrogenation process.
Background technology
TA29 alloys have the incomparable high-temperature creep resistance and antioxygenic property of other cast titanium alloy alloys, energy
One of long-term work is reached at 600 DEG C, therefore be considered as the preferred material of new Aeronautics and Astronautics engine important feature part.Mesh
Before, casting technique is to prepare one of main method of TA29 alloy components, is also unique manufacturing process of some complex structural members.
But casting technique often causes many casting flaws, such as original grain is thick, the uneven α boundlings size of crystal grain big, grain boundary α
Thick, shrinkage cavity and porosity, stomata etc., the presence of these defects will have a strong impact on the performance of casting, particularly tensile strength, fatigue
Performance and plasticity, therefore, for the higher casting of performance requirement, will generally carry out hip treatment before being delivered for use,
To eliminate these casting flaws.However, because TA29 alloy heat and other static pressuring processes treatment temperatures are higher, in hip treatment mistake
Crystal grain can grow up in journey, make that original thick cast sturcture is thicker, and it is quiet that this counteracts heat etc. to a certain extent again
Improvement result of the pressure technique to alloy mechanical property.Therefore, the method for improving casting ZTA29 alloy microstructures is to improve the conjunction
The effective way of golden cast properties.
For TA29 alloys, fragility of its material itself is larger, hot cracking tendency big, therefore, improves microcosmic group of casting
Knit, thinning microstructure is the key for preparing high-performance TA29 alloy-steel castings.
The content of the invention
It is an object of the invention to improve ZTA29 alloy microstructures, the comprehensive mechanical property of TA29 alloys is improved.
The present invention technical solution be：
The chemical composition and percentage by weight of the ZTA29 alloys be：Al 5.8%, Sn 4.0%, Zr 4.0%, Nb
0.7%, Ta 1.5%, Si 0.4%, C 0.06%, surplus is Ti, and this kind improves casting ZTA29 alloy-steel casting microstructures
The step of method, is as follows：
It is characterized in that：The step of this method, is as follows：
Step 1: casting ZTA29 alloy-steel castings are carried out into hip treatment, hip temperature in high temperature insostatic pressing (HIP) stove
For 950~1030 DEG C, the high temperature insostatic pressing (HIP) time is 1~4h, and pressure is 110~140Mpa；
Step 2: by after the casting ZTA29 alloy-steel castings polishing after high temperature insostatic pressing (HIP), acetone cleaning, being placed on tubular type hydrogenation
In treatment furnace, 10 are evacuated in stove-3Pa, then 700~850 DEG C, insulation 20min, according to casting in stove will be warming up in stove
The hydrogen that the 0.5~1.0% of ZTA29 alloy-steel casting weight is filled with equivalent weight carries out hydrogenation treatment, and the flow for being filled with hydrogen is
1L/min, is incubated 1~2h, starts to be evacuated to 10 after the time arrives, in stove-1Pa, is then charged with air, opens tube furnace and is air-cooled to
Room temperature；
Step 3: the casting ZTA29 alloy-steel castings after hydrogenation treatment are put into heat-treatment furnace, furnace temperature rises to 750~900
DEG C, to temperature after be incubated 30min, be then air-cooled to room temperature, then casting ZTA29 alloy-steel castings are heated to 730~780 DEG C, insulation 4
~6h, cools to 250 DEG C with the furnace, then be air-cooled to room temperature；
Step 4: the casting ZTA29 alloy-steel castings after processing are carried out into pickling, casting ZTA29 alloys will be cast after pickling
Part is placed in vacuum heat treatment furnace, will be evacuated to 10 in stove-3Pa, in-furnace temperature rises to 700~780 DEG C, is incubated 2~4 small
When, after the time arrives, ZTA29 alloy-steel castings cool to 250 DEG C with the furnace, are air-cooled to room temperature.
Brief description of the drawings
The microstructure of the TA29 alloy-steel castings of the non-hip treatments of Fig. 1, shrinkage cavity defect healing, local organization deformation
The microstructure of TA29 alloy-steel castings, shrinkage cavity defect healing, local group after Fig. 2 heat and other static pressuring processes processing of the present invention
Knit deformation
The TA29 alloy-steel casting microstructures of Fig. 3 before processings of the present invention
Fig. 4 is the TA29 alloy-steel casting microstructures after the PROCESS FOR TREATMENT of implementation 3
Embodiment
Technical solution of the present invention is further described below with reference to drawings and examples：
The chemical composition and percentage by weight of the ZTA29 alloys be：Al 5.8%, Sn 4.0%, Zr 4.0%, Nb
0.7%, Ta 1.5%, Si 0.4%, C 0.06%, surplus is Ti.
Embodiment one：
The high temperature insostatic pressing (HIP) of the present invention-hydrogenation treatment improves the step of casting TA29 alloy microstructure techniques：
Step 1: ZTA29 alloy-steel castings are carried out into hip treatment in high temperature insostatic pressing (HIP) stove, hip temperature is
950 DEG C, the high temperature insostatic pressing (HIP) time is 2h, and pressure is 130Mpa；
Step 2: hydrogenation treatment：After the casting TA29 alloy-steel castings polishing after high temperature insostatic pressing (HIP), acetone cleaning, it is placed on
Tubular type is put in hydrogen stove, will be evacuated to 10 in stove-3Pa, then 730 DEG C, insulation 30min, according to stove medium casting will be warming up in stove
Percentage by weight is filled with 0.5% hydrogen.Casting is weighed according to stokehold is entered, it is known that the weight of casting is 100g, according to ratio
Weight is filled with for 0.5g hydrogen, hydrogen flowing quantity is filled with for 1L/min, is incubated in 1h, stove and starts to be evacuated to 10-1Pa, is passed through big
Gas, opens tube furnace and is air-cooled to room temperature, obtain putting hydrogen TA29 alloy-steel castings；
Step 3: solid solution, Ageing Treatment：Casting after step 2 is handled is put into vacuum heat treatment furnace, furnace temperature liter
To 900 DEG C, to temperature after be incubated 30min, be then air-cooled to room temperature, then the casting TA29 alloy-steel castings after cooling are heated to 730
DEG C, 4h is incubated, 250 DEG C are cooled to the furnace, then be air-cooled to room temperature；
Step 4: the TA29 alloy-steel castings after solid solution, Ageing Treatment carry out pickling；Casting after processing is placed at Vacuum Heat
Manage in stove；
Step 5: vacuum dehydrogenation is handled：Will after step 4 pickling processes casting, be placed in vacuum heat treatment furnace, will
10 are evacuated in stove-3Pa, in-furnace temperature rises to 730 DEG C, is incubated 2 hours, and casting cools to 250 DEG C with the furnace, is air-cooled to room
Temperature, that is, obtain hydrogenation treatment TA29 alloy-steel castings.
Embodiment two：
The high temperature insostatic pressing (HIP) of the present invention-hydrogenation treatment improves the step of casting TA29 alloy microstructure techniques：
Step 1: ZTA29 alloy-steel castings are carried out into hip treatment in high temperature insostatic pressing (HIP) stove, hip temperature is
980 DEG C, the high temperature insostatic pressing (HIP) time is 1h, and pressure is 130Mpa；
Step 2: hydrogenation treatment：After the casting TA29 alloy-steel castings polishing after high temperature insostatic pressing (HIP), acetone cleaning, it is placed on
Tubular type is put in hydrogen stove, will be evacuated to 10 in stove-3Pa, then 760 DEG C, insulation 30min, according to stove medium casting will be warming up in stove
Percentage by weight is filled with 0.7% hydrogen.Casting is weighed according to stokehold is entered, it is known that the weight of casting is 50g, is filled according to ratio
Enter weight for 0.35g hydrogen, the flow for being filled with hydrogen is 1L/min, is incubated in 1.5h, stove and starts to be evacuated to 10-1Pa, is passed through
Air, opens tube furnace and is air-cooled to room temperature, obtain putting hydrogen TA29 alloy-steel castings；
Step 3: solid solution, Ageing Treatment：Casting after step 2 is handled is put into heat-treatment furnace, furnace temperature rises to 850
DEG C, to temperature after be incubated 30min, be then air-cooled to room temperature, then the TA29 alloy-steel castings after cooling are heated to 750 DEG C, be incubated 5h,
Cool to 250 DEG C with the furnace, then be air-cooled to room temperature；
Step 4: the TA29 alloy-steel castings after solid solution, Ageing Treatment are carried out into pickling；
Step 5: vacuum dehydrogenation is handled：Will after step 4 pickling processes casting, be placed in vacuum heat treatment furnace, will
10 are evacuated in stove-3Pa, in-furnace temperature rises to 750 DEG C, is incubated 3 hours, and casting cools to 250 DEG C with the furnace, is air-cooled to room
Temperature, that is, obtain hydrogenation treatment TA29 alloy-steel castings.
Embodiment three：
The high temperature insostatic pressing (HIP) of the present invention-hydrogenation treatment improves the step of casting TA29 alloy microstructure techniques：
Step 1: ZTA29 alloy-steel castings are carried out into hip treatment in high temperature insostatic pressing (HIP) stove, hip temperature is
1030 DEG C, the high temperature insostatic pressing (HIP) time is 4h, and pressure is 150Mpa；Step 2: hydrogenation treatment：Casting TA29 after high temperature insostatic pressing (HIP) is closed
After golden casting pickling, it is placed on tubular type and puts in hydrogen stove, 10 will be evacuated in stove-3Pa, then 850 DEG C, insulation will be warming up in stove
30min, be filled with according to the percentage by weight of stove medium casting 1% hydrogen.Casting is weighed according to stokehold is entered, it is known that the weight of casting
Measure as 900g, weight is filled with for 9g hydrogen according to ratio, the flow for being filled with hydrogen is 1L/min, be incubated in 2h, stove and start to take out true
It is empty to 10-1Pa, is passed through air, opens tube furnace and is air-cooled to room temperature, obtains putting hydrogen TA29 alloy-steel castings.Step 3: solid solution, timeliness
Processing：Casting after step 2 is handled is put into heat-treatment furnace, furnace temperature rises to 750 DEG C, is incubated 30min, is then air-cooled to
Room temperature, then the casting TA29 alloy-steel castings after cooling are heated to 760 DEG C, 8h is incubated, 250 DEG C are furnace-cooled to, then be air-cooled to room temperature；
Step 4: the TA29 alloy-steel castings after step 3 is handled carry out pickling processes；
Step 5: vacuum dehydrogenation is handled：Will after step 4 pickling processes casting, be placed in vacuum heat treatment furnace, will
10 are evacuated in stove-3Pa, in-furnace temperature rises to 780 DEG C, is incubated 4 hours, and casting cools to 250 DEG C with the furnace, is air-cooled to room
Temperature, that is, obtain hydrotreated TA29 alloy-steel castings.
Referring to shown in accompanying drawing 1~4, technical solution of the present invention is closed using high temperature insostatic pressing (HIP), hydrogenation process to TA29 simultaneously
Golden Technique of Casting Microstructure refining effect, repairs microstructure Hole, has refined microcosmic crystal grain, the mechanical property (fatigue of casting
Intensity etc.) it is improved, wherein room temperature tensile intensity, yield strength improve about 8%, Testing Tensile Strength at Elevated Temperature, yield strength
About 10% is improved, is that TA29 alloy-steel castings are laid a good foundation in the further application of Aeronautics and Astronautics engine art.
Claims (1)
1. a kind of improve the method for casting ZTA29 alloy-steel casting microstructures, the chemical composition and weight hundred of the ZTA29 alloys
Point ratio is：Al 5.8%, Sn 4.0%, Zr 4.0%, Nb 0.7%, Ta 1.5%, Si 0.4%, C 0.06%, surplus is
Ti, it is characterised in that：The step of this method, is as follows：
Step 1: casting ZTA29 alloy-steel castings are carried out into hip treatment in high temperature insostatic pressing (HIP) stove, hip temperature is
950~1030 DEG C, the high temperature insostatic pressing (HIP) time is 1~4h, and pressure is 110~140Mpa；
Step 2: by after the casting ZTA29 alloy-steel castings polishing after high temperature insostatic pressing (HIP), acetone cleaning, being placed on tubular type hydrogenation treatment
In stove, 10 are evacuated in stove-3Pa, then 700~850 DEG C, insulation 20min, according to casting ZTA29 conjunctions in stove will be warming up in stove
The hydrogen that the 0.5~1.0% of golden casting weight is filled with equivalent weight carries out hydrogenation treatment, and the flow for being filled with hydrogen is 1L/min,
1~2h is incubated, starts to be evacuated to 10 after the time arrives, in stove-1Pa, is then charged with air, opens tube furnace and is air-cooled to room temperature；
Step 3: the casting ZTA29 alloy-steel castings after hydrogenation treatment are put into heat-treatment furnace, furnace temperature rises to 750~900 DEG C,
30min is incubated after to temperature, room temperature is then air-cooled to, then casting ZTA29 alloy-steel castings are heated to 730~780 DEG C, insulation 4~
6h, cools to 250 DEG C with the furnace, then be air-cooled to room temperature；
Step 4: the casting ZTA29 alloy-steel castings after processing are carried out into pickling, casting ZTA29 alloy-steel castings will be put after pickling
In in vacuum heat treatment furnace, 10 will be evacuated in stove-3Pa, in-furnace temperature rises to 700~780 DEG C, is incubated 2~4 hours, when
Between arrive after, ZTA29 alloy-steel castings cool to 250 DEG C with the furnace, are air-cooled to room temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710256353.1A CN107058803A (en) | 2017-04-19 | 2017-04-19 | It is a kind of to improve the method for casting ZTA29 alloy-steel casting microstructures |
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| CN201710256353.1A CN107058803A (en) | 2017-04-19 | 2017-04-19 | It is a kind of to improve the method for casting ZTA29 alloy-steel casting microstructures |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107974653A (en) * | 2017-12-01 | 2018-05-01 | 中国航空工业标准件制造有限责任公司 | A kind of underproof optimization method of titanium-niobium alloy part annealing heat-treats |
| CN114774818A (en) * | 2022-04-11 | 2022-07-22 | 中国科学院金属研究所 | Heat treatment process for improving Ti65 alloy casting structure |
| CN114774817A (en) * | 2022-04-09 | 2022-07-22 | 中国科学院金属研究所 | Heat treatment process of Ti6246 alloy casting |
| CN114774819A (en) * | 2022-04-11 | 2022-07-22 | 中国科学院金属研究所 | Heat treatment process of TC4 alloy casting |
| CN115821184A (en) * | 2022-11-08 | 2023-03-21 | 河北钢研德凯科技有限公司 | Densification treatment method for ZTi60 titanium alloy and application thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107974653A (en) * | 2017-12-01 | 2018-05-01 | 中国航空工业标准件制造有限责任公司 | A kind of underproof optimization method of titanium-niobium alloy part annealing heat-treats |
| CN114774817A (en) * | 2022-04-09 | 2022-07-22 | 中国科学院金属研究所 | Heat treatment process of Ti6246 alloy casting |
| CN114774818A (en) * | 2022-04-11 | 2022-07-22 | 中国科学院金属研究所 | Heat treatment process for improving Ti65 alloy casting structure |
| CN114774819A (en) * | 2022-04-11 | 2022-07-22 | 中国科学院金属研究所 | Heat treatment process of TC4 alloy casting |
| CN115821184A (en) * | 2022-11-08 | 2023-03-21 | 河北钢研德凯科技有限公司 | Densification treatment method for ZTi60 titanium alloy and application thereof |
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