CN109706367A - Multi-principal high-entropy alloy material and its application in screw tap processing - Google Patents
Multi-principal high-entropy alloy material and its application in screw tap processing Download PDFInfo
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- CN109706367A CN109706367A CN201910092719.5A CN201910092719A CN109706367A CN 109706367 A CN109706367 A CN 109706367A CN 201910092719 A CN201910092719 A CN 201910092719A CN 109706367 A CN109706367 A CN 109706367A
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Abstract
The present invention uses defect for prior art plug tap is existing, provides a kind of multi-principal high-entropy alloy material, and process screw tap with it, the chemical formula of the alloy material is AlxCoCrCuFeScyYzZr, wherein 0.1≤x≤1.3,0.1≤y≤1.3,0.1≤z≤0.4；And 0.01 < x/ (x+y+z+4) < 0.25,0.01 < y/ (x+y+z+4) < 0.25,0.01 < z/ (x+y+z+4) < 0.10.The multi-principal high-entropy alloy material has the characteristics that relative density height, institutional framework fine uniform, and processes obtained screw tap, and intensity and wearability improve a lot.
Description
Technical field
The invention belongs to multi-principal high-entropy alloy field of material technology, and in particular to multi-principal high-entropy alloy material and its
Application in screw tap processing.
Background technique
Mechanical removal processing relies primarily on cutter completion, is known as " industrial tooth ", the development to machinery manufacturing industry
There is very important effect.But the abrasion of cutter is inevitable phenomenon during the cutting process, directly affects machining
Precision, surface roughness, processing quality, efficiency etc..The failure of cutter is broadly divided into normal failure and improper failure.It is normal to lose
Effect is primarily referred to as tool wear to the limit and has not been available the tool wear that must be replaced.The cutter normally to fail is worn except cutter ring
It is unable to outside normal use, rest part is normal；It is improper failure be mainly cutter cutter ring do not reach the limit of wear and because other
Reason leads to the failure conditions for being unable to normal use, such as: cutter ring fracture, bearing damage.Tapping as in machining process most
Difficult one of process is because tapping process is fully enclosed in workpiece material, and screw tap greatly, axially rubs with work piece interface product
Wipe greatly, and generate a large amount of heat and scrap in process etc., it is that tap tapping increases difficulty in the process, reduces
Its working efficiency.Simultaneously because being threaded in, mechanical equipment application aspect is very universal, and screw tap adds as typical internal screw thread
Work cutter, therefore, the intensity and wearability for improving screw tap are of great significance.And multi-principal high-entropy alloy breaks through conventional alloys
Design concept, and there is high-wearing feature, highly corrosion resistant, excellent thermal stability, high intensity, high rigidity and high temperature oxidation resistance
Etc. excellent characteristics, these excellent performances meet the performance requirement of screw tap key, therefore, develop and design high-strength high abrasion screw tap
It is had a vast market foreground with novel multi-principal elements alloy material.
Summary of the invention
The present invention uses defect for prior art plug tap is existing, provides a kind of multi-principal high-entropy alloy material, and
Screw tap is processed with it, which has the characteristics that relative density height, institutional framework fine uniform, and adds
The screw tap that work obtains, intensity and wearability improve a lot.
A kind of multi-principal high-entropy alloy material, the chemical formula of the alloy material are AlxCoCrCuFeScyYzZr, wherein
0.1≤x≤1.3,0.1≤y≤1.3,0.1≤z≤0.4；And 0.01 < x/ (x+y+z+4) < 0.25,0.01 < y/ (x+y+z+4) <
0.25、0.01<z/(x+y+z+4)<0.10。
Application of the multi-principal high-entropy alloy material in screw tap processing.
Preferably, application of the multi-principal high-entropy alloy material in screw tap processing, comprising the following steps:
(1) according to the mol ratio of each element in the chemical formula, the metal of Al, Co, Cr, Cu, Fe, Sc and Zr are taken respectively
Powder, and Y is with Y2O3Form be added, then by above-mentioned metal powder and Y2O3Mixing, and under protective gas by ball milling
Obtain mixing；
(2) mixing that step (1) obtains is packed into the graphite jig for processing screw tap under protective gas, then will
The graphite jig is packed into discharge plasma sintering furnace；
(3) after pressurizeing on step (2) described graphite jig, the furnace chamber pressure of discharge plasma sintering furnace is taken out later true
Sky is to 100Pa hereinafter, in 900-1500 DEG C of sintering 0.5-2h up to screw tap.
Preferably, in the step (1), the purity of metal powder is all larger than 99.5%, Y2O3Purity be greater than 99.9%.
Preferably, in the step (1), when ball milling, the ball material mass ratio of stainless steel ball and mixing is 5-10:1.
Preferably, in the step (1), in the step (1), when ball milling, ball mill used was planetary ball mill,
The revolving speed of ball mill is 30~100rpm, Ball-milling Time 0.5-6h.
Preferably, the protective gas in the step (1) and step (2) is argon gas or nitrogen.
Preferably, moulding pressure is 5-50Mpa in the step (3).
The beneficial effects of the present invention are:
Multi-principal elements alloy of the invention is made of FCC+HCP mixed phase, with consistency is high, thermal stability is good, tissue
The features such as fine uniform, the screw tap that processing technology according to the invention obtains, intensity and hardness significantly improve, and wear-resisting property is excellent
It is different.
The present invention is powder sintered at screw tap by multi-principal elements alloy in graphite jig using discharge plasma sintering technique, gram
Having taken conventionally employed metal powder is that raw material directly passes through the method preparation of powder metallurgy to be difficult to obtain simple solid solution structure mostly main
The shortcomings that first alloy；And discharge plasma sintering technique sintering temperature that the present invention uses is low, shaping speed is fast, heating is equal
It is even, it is suppressed that crystal grain is grown up, and the multi-principal elements alloy block that microscopic structure is tiny, microstructure is stable, and gained screw tap are easily obtained
In multi-principal elements alloy material composition it is consistent with raw material proportioning, the controllability of processing technology is strong.
Detailed description of the invention
Fig. 1 is the X-ray diffractogram of multi-principal elements alloy material in the screw tap of the preparation of embodiment 1.
Specific embodiment
In order to keep technical purpose of the invention, technical scheme and beneficial effects clearer, with reference to the accompanying drawing and specifically
Embodiment is further illustrated technical solution of the present invention.
Embodiment 1
By chemical formula AlCoCrCuFeSc0.1Y0.1Zr weigh respectively be the aluminium powder of 0.40mol, cobalt powder, chromium powder, copper powder,
Iron powder and zirconium powder, the scandium powder of 0.04mol and the yttrium oxide of 0.02mol, the purity of various pure metal powder are above 99.5%, oxidation
The purity of yttrium is higher than 99.9%；Load weighted above-mentioned raw materials are placed in ball grinder, stainless steel is added by ball material mass ratio 10:1
Then ball in a nitrogen environment seals the ball grinder for being placed with raw material；The above-mentioned ball grinder being sealed is placed in planetary
Mixing is carried out on ball mill, mixing revolving speed is 100rpm, time 0.5h；By the powder after above-mentioned uniform mixing in nitrogen gas
The lower graphite jig being packed into for processing screw tap of protection, then graphite jig is packed into discharge plasma sintering furnace；In graphite mo(u)ld
Precompression 10MPa is determined at the beginning of loading one on tool, then furnace chamber is evacuated down to 100Pa hereinafter, being rapidly heated to 900 DEG C, keeps the temperature 2h,
Maximum pressure 50MPa, sintering are completed up to chemical formula to be AlCoCrCuFeSc0.1Y0.1It is prepared by the multi-principal high-entropy alloy material of Zr
Made of screw tap.
XRD test is carried out to the alloy material of gained screw tap, test results are shown in figure 1, it can be seen from the figure that silk
Multi-principal elements alloy in cone is made of FCC+HCP mixed phase so that screw tap intensity and wearability significantly improve, remaining embodiment with
The XRD structure no significant difference of embodiment 1, gained screw tap performance are roughly the same.
Embodiment 2
By chemical formula Al0.1CoCrCuFeSc0.1Y0.4Zr is weighed respectively to be the aluminium powder of 0.04mol and scandium powder, is
The purity of cobalt powder, chromium powder, copper powder, iron powder and the zirconium powder of 0.40mol and the yttrium oxide of 0.08mol, various pure metal powder is high
In 99.5%, the purity of yttrium oxide is higher than 99.9%；Load weighted above-mentioned raw materials are placed in ball grinder, by ball material mass ratio 9:
1 is added suitable stainless steel ball, then in a nitrogen environment seals the ball grinder for being placed with raw material；It is sealed above-mentioned
Ball grinder, which is placed on planetary ball mill, carries out mixing, and mixing revolving speed is 30rpm, time 6h；After above-mentioned uniform mixing
Powder is packed into the graphite jig for processing screw tap under nitrogen gas protection, then graphite jig is packed into discharge plasma sintering
In furnace；Determine precompression 9MPa at the beginning of loading one on graphite jig, then furnace chamber is evacuated down to 100Pa hereinafter, be rapidly heated to
1100 DEG C, 1.5h, maximum pressure 45MPa are kept the temperature, sintering is completed up to chemical formula Al0.1CoCrCuFeSc0.1Y0.4More pivots of Zr
The screw tap that high entropy alloy material is prepared.
Embodiment 3
By chemical formula Al1.3CoCrCuFeSc0.1Y0.1Zr weigh respectively the aluminium powder of 0.52mol, the cobalt powder for being 0.40mol,
The purity of chromium powder, copper powder, iron powder and zirconium powder, the scandium powder of 0.04mol and the yttrium oxide of 0.02mol, various pure metal powder is above
99.5%, the purity of yttrium oxide is higher than 99.9%；Load weighted above-mentioned raw materials are placed in ball grinder, by ball material mass ratio 7:1
Suitable stainless steel ball is added, then seals the ball grinder for being placed with raw material under ar gas environment；It is sealed above-mentioned
Ball grinder, which is placed on planetary ball mill, carries out mixing, and mixing revolving speed is 40rpm, time 4h；After above-mentioned uniform mixing
Powder is packed into the graphite jig for processing screw tap under argon gas protection, then graphite jig is packed into discharge plasma sintering
In furnace；Determine precompression 8MPa at the beginning of loading one on graphite jig, then furnace chamber is evacuated down to 100Pa hereinafter, be rapidly heated to
1200 DEG C, 1h, maximum pressure 40MPa are kept the temperature, sintering is completed up to chemical formula to be Al1.3CoCrCuFeSc0.1Y0.1More pivots of Zr
The screw tap that high entropy alloy material is prepared.
Embodiment 4
By chemical formula Al0.1CoCrCuFeSc1.3Y0.1Zr weigh respectively the aluminium powder of 0.04mol, the cobalt powder for being 0.40mol,
The purity of chromium powder, copper powder, iron powder and zirconium powder, the scandium powder of 0.52mol and the yttrium oxide of 0.02mol, various pure metal powder is above
99.5%, the purity of yttrium oxide is higher than 99.9%；Load weighted above-mentioned raw materials are placed in ball grinder, by ball material mass ratio 5:1
Suitable stainless steel ball is added, then seals the ball grinder for being placed with raw material under ar gas environment；It is sealed above-mentioned
Ball grinder, which is placed on planetary ball mill, carries out mixing, and mixing revolving speed is 50rpm, time 2h；After above-mentioned uniform mixing
Powder is packed into the graphite jig for processing screw tap under argon gas protection, then graphite jig is packed into discharge plasma sintering
In furnace；Determine precompression 6MPa at the beginning of loading one on graphite jig, then furnace chamber is evacuated down to 100Pa hereinafter, be rapidly heated to
1300 DEG C, 1h, maximum pressure 40MPa are kept the temperature, sintering is completed up to chemical formula to be Al0.1CoCrCuFeSc1.3Y0.1More pivots of Zr
The screw tap that high entropy alloy material is prepared.
Embodiment 5
By chemical formula AlCoCrCuFeSc0.1Y0.2Zr weigh respectively be the aluminium powder of 0.40mol, cobalt powder, chromium powder, copper powder,
Iron powder and zirconium powder, the scandium powder of 0.04mol and the yttrium oxide of 0.04mol, the purity of various pure metal powder are above 99.5%, oxidation
The purity of yttrium is higher than 99.9%；Load weighted above-mentioned raw materials are placed in ball grinder, it is suitable not by ball material mass ratio 6:1 addition
Become rusty steel ball, then in a nitrogen environment seals the ball grinder for being placed with raw material；The above-mentioned ball grinder being sealed is placed in row
Mixing is carried out on planetary ball mill, mixing revolving speed is 60rpm, time 1h；By the powder after above-mentioned uniform mixing in nitrogen gas
The lower graphite jig being packed into for processing screw tap of body protection, then graphite jig is packed into discharge plasma sintering furnace；In graphite
Precompression 5MPa is determined at the beginning of loading one on mold, then furnace chamber is evacuated down to 100Pa hereinafter, being rapidly heated to 1500 DEG C, is kept the temperature
0.5h, maximum pressure 35MPa, sintering are completed up to chemical formula to be AlCoCrCuFeSc0.1Y0.2The multi-principal high-entropy alloy material of Zr
Expect the screw tap being prepared.
Embodiment 6
By chemical formula Al0.6CoCrCuFeSc0.6Y0.1Zr weighs the aluminium powder of 0.24mol respectively and scandium powder, is 0.40mol
Cobalt powder, chromium powder, copper powder, iron powder and zirconium powder and 0.02mol yttrium oxide, the purity of various pure metal powder is above 99.5%,
The purity of yttrium oxide is higher than 99.9%；Load weighted above-mentioned raw materials are placed in ball grinder, are added by ball material mass ratio 8:1 appropriate
Stainless steel ball, then the ball grinder for being placed with raw material is sealed under ar gas environment；The above-mentioned ball grinder being sealed is set
In carrying out mixing on planetary ball mill, mixing revolving speed is 100rpm, time 0.5h；Powder after above-mentioned uniform mixing is existed
The lower graphite jig being packed into for processing screw tap of argon gas protection, then graphite jig is packed into discharge plasma sintering furnace；
Precompression 6MPa is determined at the beginning of loading one on graphite jig, then furnace chamber is evacuated down to 100Pa hereinafter, being rapidly heated to 1300
DEG C, 1h, maximum pressure 40MPa are kept the temperature, sintering is completed up to chemical formula to be Al0.6CoCrCuFeSc0.6Y0.1The high entropy of more pivots of Zr
The screw tap that alloy material is prepared.
Embodiment 7
By chemical formula AlCoCrCuFeScY0.4Zr weigh respectively be 0.40mol aluminium powder, cobalt powder, chromium powder, copper powder, iron
The yttrium oxide of powder, scandium powder and zirconium powder and 0.08mol, the purity of various pure metal powder are above 99.5%, the purity is high of yttrium oxide
In 99.9%；Load weighted above-mentioned raw materials are placed in ball grinder, suitable stainless steel ball are added by ball material mass ratio 10:1, so
The ball grinder for being placed with raw material is sealed in a nitrogen environment afterwards；The above-mentioned ball grinder being sealed is placed in planetary ball mill
Upper carry out mixing, mixing revolving speed are 50rpm, time 2h；Powder after above-mentioned uniform mixing is filled under nitrogen gas protection
Enter the graphite jig for processing screw tap, then graphite jig is packed into discharge plasma sintering furnace；It is loaded on graphite jig
Precompression 9MPa is determined at the beginning of one, then furnace chamber is evacuated down to 100Pa hereinafter, being rapidly heated to 1100 DEG C, keeps the temperature 1.5h, maximum pressure
Power 45MPa, sintering are completed up to chemical formula to be AlCoCrCuFeScY0.4The silk that the multi-principal high-entropy alloy material of Zr is prepared
Cone.
It should be noted last that: technical solution of the present invention that the above embodiments are only illustrative and not limiting is any right
The equivalent replacement and do not depart from the modification of spirit and scope of the invention or locally replace that the present invention carries out, should all cover in this hair
Within bright protective scope of the claims.
Claims (8)
1. a kind of multi-principal high-entropy alloy material, which is characterized in that the chemical formula of the alloy material is
AlxCoCrCuFeScyYzZr, wherein 0.1≤x≤1.3,0.1≤y≤1.3,0.1≤z≤0.4；And 0.01 < x/ (x+y+z+4) <
0.25、0.01<y/(x+y+z+4)<0.25、0.01<z/(x+y+z+4)<0.10。
2. application of the multi-principal high-entropy alloy material described in claim 1 in screw tap processing.
3. according to claim 2 multi-principal high-entropy alloy material screw tap processing in application, which is characterized in that including with
Lower step:
(1) according to the mol ratio of each element in the chemical formula, the metal powder of Al, Co, Cr, Cu, Fe, Sc and Zr are taken respectively
End, and Y is with Y2O3Form be added, then by above-mentioned metal powder and Y2O3Mixing, and under protective gas obtain ball milling
To mixing；
(2) mixing that step (1) obtains is packed into the graphite jig for processing screw tap under protective gas, then by the stone
Black mold is packed into discharge plasma sintering furnace；
(3) after pressurizeing on step (2) described graphite jig, in 900-1500 DEG C of vacuum-sintering 0.5-2h up to screw tap.
4. application of the multi-principal high-entropy alloy material in screw tap processing according to claim 3, which is characterized in that the step
Suddenly in (1), the purity of metal powder is all larger than 99.5%, Y2O3Purity be greater than 99.9%.
5. application of the multi-principal high-entropy alloy material in screw tap processing according to claim 3, which is characterized in that the step
Suddenly in (1), in the step (1), when ball milling, ball mill used was planetary ball mill, the revolving speed of ball mill is 30~
100rpm, Ball-milling Time 0.5-6h.
6. application of the multi-principal high-entropy alloy material in screw tap processing according to claim 5, which is characterized in that the step
Suddenly in (1), when ball milling, the ball material mass ratio of stainless steel ball and mixing is 5-10:1.
7. application of the multi-principal high-entropy alloy material in screw tap processing according to claim 3, which is characterized in that the step
Suddenly the protective gas in (1) and step (2) is argon gas or nitrogen.
8. application of the multi-principal high-entropy alloy material in screw tap processing according to claim 3, which is characterized in that the step
Suddenly in (3), moulding pressure 35-50Mpa.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR3096988A1 (en) * | 2019-06-07 | 2020-12-11 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Manufacturing process by sintering a part in a nitrided CCA alloy |
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