CN109266952A - A kind of titanium master alloy steel and titanium master alloy powdered steel sintering process - Google Patents
A kind of titanium master alloy steel and titanium master alloy powdered steel sintering process Download PDFInfo
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- CN109266952A CN109266952A CN201811191999.7A CN201811191999A CN109266952A CN 109266952 A CN109266952 A CN 109266952A CN 201811191999 A CN201811191999 A CN 201811191999A CN 109266952 A CN109266952 A CN 109266952A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
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Abstract
The invention discloses a kind of titanium master alloy steel, the component including following weight percent: 2.3~4wt% of carbon C, 5~6wt% of titanium Ti, 3~4wt% of chromium Cr, 2.3~4wt% of molybdenum Mo, niobium 1~2wt% of Nb, surplus are iron Fe.The invention also discloses the powder sintering process of titanium master alloy steel, including selecting the raw material of titanium carbide TiC, chromium carbide Cr3C2, molybdenum carbide Mo2C, niobium carbide NbC, pure iron powder and pure carbon powder end as powder sintered high titanium steel, carry out ball milling mixing, sieve is inserted to be granulated, drying, high titanium steel base type is suppressed, cooling is come out of the stove after sintering, obtains titanium master alloy steel finished product.The present invention uses powder pressing forming and vacuum sintering technology, improves the uniform texture of titanium master alloy steel, overcomes carbide composition segregation and oxide impurity incorporation, has excellent comprehensive performance.
Description
Technical field
The present invention relates to inorganic metallic materials technical field, in particular to a kind of titanium master alloy steel and titanium master alloy powdered steel
Sintering process.
Background technique
Currently, the industrially high alloy steel of commonly used centrifugal casting titaniferous Ti, generally also contain a large amount of Cr, Mo, V
Equal elements cause component segregation and oxide folder in alloy material since element specific gravity difference is big and titanium elements easily aoxidize
Miscellaneous appearance causes cast alloy steel overall performance to substantially reduce in use.
For this purpose, it is necessory to develop a kind of novel titanium master alloy steel and its powder sintering process, to overcome alloy
It component segregation and avoids oxide impurity, improves the comprehensive performance of titanium master alloy steel.
Summary of the invention
It is an object of the present invention to be directed to the above-mentioned deficiency of the prior art, a kind of titanium master alloy steel and titanium master alloy are provided
Powdered steel sintering process improves the uniform texture of titanium master alloy steel using powder pressing forming and vacuum sintering technology
Property, carbide composition segregation and oxide impurity incorporation are overcome, there is excellent comprehensive performance.
The technical scheme adopted by the invention to achieve the purpose is as follows:
A kind of titanium master alloy steel, the component including following weight percent: 2.3~4wt% of carbon C, 5~6wt% of titanium Ti,
3~4wt% of chromium Cr, 2.3~4wt% of molybdenum Mo, niobium 1~2wt% of Nb, surplus are iron Fe.
A kind of titanium master alloy steel, the component including following weight percent: carbon C 2.473wt%, titanium Ti 6wt%, chromium Cr
3wt%, molybdenum Mo 2wt%, niobium Nb 2wt%, surplus are iron Fe.
A kind of titanium master alloy steel, the component including following weight percent: carbon C 2.703%wt%, titanium Ti 5.8wt%,
Chromium Cr 3.2wt%, molybdenum Mo 2.1wt%, niobium Nb 1.8wt%, surplus are iron Fe.
A kind of titanium master alloy steel, the titanium master alloy steel are by titanium carbide TiC, chromium carbide Cr3C2, molybdenum carbide Mo2C, carbonization
Niobium NbC, pure iron powder and pure carbon powder are prepared for base-material.
A kind of powder sintering process of titanium master alloy steel, including the following steps:
S1: titanium carbide TiC, chromium carbide Cr3C2, molybdenum carbide Mo2C, niobium carbide NbC, pure iron powder and pure carbon powder end are selected
As the raw material of powder sintered high titanium steel, powder diameter is 10~20 μm；
S2: raw material selected by step S1 is put into planetary ball mill and carries out ball milling mixing, obtains ball milling mixing material, after ball milling
Powder particle size is 4~8 μm；
S3: being added in ball milling mixing material after heating paraffin is melted together with dehydrated alcohol, is tuned into pureed by stirring, into
Row is inserted sieve and is granulated, and later dries mixture spherolite, obtains the high titanium steel raw material spherolite of powder；
S4: after the high titanium steel raw material spherolite of powder is packed into mold, suppressing high titanium steel base type on electro-hydraulic formula press machine,
Later the high titanium steel blank suppressed is put into be sintered and cooled in vacuum carbon tube furnace and be come out of the stove, obtains titanium master alloy steel finished product.
As the further improvement to technical solution of the present invention, the weight percent of raw material is selected in the step S2
Are as follows: titanium carbide TiC dosage be 7.536wt% wherein carbon content be 1.536wt%, chromium carbide Cr3C2 dosage be 3.154wt% its
Middle carbon content is 0.154wt%, molybdenum carbide Mo2C dosage be 2.125wt% wherein carbon content be 0.125wt%, niobium carbide NbC
Dosage be 2.258wt% wherein carbon content be 0.258wt%, pure iron powder 84.527wt% and pure carbon powder end 0.4wt%.
As the further improvement to technical solution of the present invention, paraffin, dehydrated alcohol, ball milling mixing in the step S3
The weight ratio of material is 3-8:20-40:100；The drying temperature is 80 DEG C.
As the further improvement to technical solution of the present invention, high titanium steel base type pressure maintaining 3~5 is suppressed in the step S4
Minute；Vacuum carbon tube furnace vacuum degree control is 10 when high titanium steel is sintered-3Pa；Cooling tapping temperature is 80~100 DEG C.
As the further improvement to technical solution of the present invention, the partial size of the high titanium steel raw material spherolite of the powder is 75~
100μm。
Compared with prior art, the selected appropriate proportioning component of titanium master alloy steel of the invention, using powder pressing forming and
The carbide of Ti, Cr, Mo, V and iron-based powder mixed sintering can get the titanium master alloy steel of uniform texture by vacuum-sintering
Material, the generation for effectivelying prevent carbide composition segregation and oxide to be mingled with.
Above-mentioned is the general introduction of inventive technique scheme, below in conjunction with attached drawing and specific embodiment, is done further to the present invention
Explanation.
Detailed description of the invention
Fig. 1 is the sintering temperature and the relation curve schematic diagram of time of the present embodiment.
Specific embodiment:
In order to which the purpose of the present invention and technical solution and advantage is more clearly understood, make with reference to embodiments specifically
It is bright.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Embodiment 1: a kind of titanium master alloy steel and titanium master alloy powdered steel sintering process of the present embodiment, using vacuum-sintering
Carbon shirt-circuiting furnace is sintered, with weight percent 7.536%TiC, 3.154%Cr3C2,2.125%Mo2C, 2.258%NbC,
The pure C powder of 84.527% pure Fe and 0.4% is raw material, is specifically detailed in the following table 1, by ball mill mixing, inserts sieve and is granulated and suppresses
Preparation process is completed in sintering.
The content (wt%) of the feed components of powder sintered high titanium steel
Specific preparation method includes the following steps:
1) ball mill mixing: weighing raw material according to the above ratio, is fitted into zirconia ball grinding jar, the zirconia ball of ball milling it is straight
Diameter is respectively 5mm, 8mm, 12mm and 15mm, and ratio of grinding media to material 4:1, using wet-milling, medium is dehydrated alcohol, later in planetary ball mill
Mixing, rate 300r/min, time 4h are carried out on machine.After the completion of ball milling, takes out high titanium steel powder material and be put into thermostatted water
In the container of bath, paraffin and dehydrated alcohol heating fusing are formed into liquid, adds and is similarly 60 DEG C of the good slurry of mixing
In, then stir 10min, make its be uniformly mixed, wherein paraffin, dehydrated alcohol, ball milling mixing material weight ratio be 3:20:
100。
2) it inserts sieve to be granulated: mixed powder placement be dried in a vacuum drying oven, drying temperature is 80 DEG C, to nothing
Water-ethanol volatilization, the dry 6h in 80 DEG C of environment.It selects the sieve of 140 mesh to carry out wiping sieve, crosses the sieve of 200 mesh, create
Particle size is between 75-100 μm.
3) compacting sintering: the high titanium steel spherolite being granulated is packed into mold, using unidirectional compression moulding, pressure maintaining 3-5min.
To prevent mold sticking, certain release agent can be used in cavity body of mould.It is sintered: 1. vacuumizing later: will be true
Reciprocal of duty cycle is extracted into 10-3Pa；2. the low temperature presintering stage: temperature is risen to 450 DEG C with the heating rate of 10 DEG C/min, keep the temperature 30min with
Eliminate forming agent；The sintering stage 3. medium temperature heats up: 1000 DEG C of heat preservation 30min are warming up to the rate of 10 DEG C/min；4. high temperature dwell
Temperature sintering: 1250 DEG C of sintering temperature for being warming up to setting with the heating rate of 10 DEG C/min keep the temperature 60min, material are made to reach one
Fixed consistency completes sintering process；5. cooling down: furnace cooling is taken out after being cooled to 100 DEG C or less.Entire sintering process medium temperature
Angle value fluctuates the vacuum degree 10 within 0.5 DEG C-1~10-2Pa。
The chemical component and weight percent for the powder sintered titanium master alloy steel that the present embodiment is obtained by above-mentioned technique
It (wt%) is C:2.473%, Ti:6%, Cr:3%, Mo:2%, Nb:2%, surplus Fe.After tested, resulting titanium master alloy
The hardness number of steel is HRC 63, and bending strength 1200MPa, relative density is greater than 98%, the uniform texture of titanium master alloy steel
Property it is good, do not find that the segregation of apparent carbide composition and oxide are mingled with, inevitable impurity is micro, microcomponent
0.01wt% or so.
Embodiment 2: a kind of titanium master alloy steel and titanium master alloy powdered steel sintering process of the present embodiment, chemical component and
Weight percent (wt%) are as follows: C:2.703%, Ti:5.8%, Cr:3.2%, Mo:2.1%, Nb:1.8%, surplus Fe.Tool
Preparation is as follows: 1) selecting TiC (titanium carbide), Cr3C2 (chromium carbide), Mo2C (molybdenum carbide), NbC (niobium carbide), pure iron
The raw material of powder and pure carbon powder end as powder sintered high titanium steel, powder diameter are 10~20 μm (micron).
2) selected raw material is put into planetary ball mill in the ratio in following table 2 and carries out ball milling mixing, powder after ball milling
Partial size is 4~8 μm.
Table 2:
The content (wt%) of the feed components of powder sintered high titanium steel
3) it is added together with dehydrated alcohol in ball milling mixing material after melting heating paraffin, is tuned into pureed by stirring, so
After carry out insert sieve be granulated, mixture insert sieve be granulated partial size be 75~100 μm, mixture spherolite be put into drying box in 60 DEG C dry.
Wherein, paraffin, dehydrated alcohol, ball milling mixing material weight ratio be 8:21:100.
4) the high titanium steel raw material spherolite of powder is packed into mold and suppresses high titanium steel base type, pressure maintaining on electro-hydraulic formula press machine
3~5 minutes, then the high titanium steel blank suppressed is put into vacuum carbon tube furnace and is sintered high titanium steel finished product.When high titanium steel is sintered
Vacuum carbon tube furnace vacuum degree control is 10-3Pa shown in sintering temperature curve attached drawing 1, cools to 80 DEG C with the furnace and goes out after the completion of sintering
Furnace.
The chemical component and weight percent for the powder sintered titanium master alloy steel that the present embodiment is obtained by above-mentioned technique
It (wt%) is C:2.703%, Ti:5.8%, Cr:3.2%, Mo:2.1%, Nb:1.8%, surplus Fe.After tested, resulting
The hardness number of titanium master alloy steel is HRC 64, and bending strength 1250MPa, relative density is greater than 98%, the tissue of titanium master alloy steel
Structural homogeneity is good, does not find that the segregation of apparent carbide composition and oxide are mingled with, inevitable impurity be it is micro,
Microcomponent 0.01wt% or so.
Embodiment 3: a kind of titanium master alloy steel and titanium master alloy powdered steel sintering process of the present embodiment, chemical component and
Weight percent (wt%) are as follows: C:2.693%, Ti:5%, Cr:4%, Mo:3%, Nb:2%, surplus Fe.Specific preparation side
Method is as follows: 1) selecting TiC (titanium carbide), Cr3C2 (chromium carbide), Mo2C (molybdenum carbide), NbC (niobium carbide), pure iron powder and pure
Raw material of the carbon dust as powder sintered high titanium steel, powder diameter are 10~20 μm (micron).2) by selected raw material by following
Ratio in table 2 is put into planetary ball mill and carries out ball milling mixing, and powder particle size is 4~8 μm after ball milling.Table 2:
The content (wt%) of the feed components of powder sintered high titanium steel
5) it is added together with dehydrated alcohol in ball milling mixing material after melting heating paraffin, is tuned into pureed by stirring, so
After carry out insert sieve be granulated, mixture insert sieve be granulated partial size be 75~100 μm, mixture spherolite be put into drying box in 70 DEG C dry.
Wherein, paraffin, dehydrated alcohol, ball milling mixing material weight ratio be 5:33:100.
4) the high titanium steel raw material spherolite of powder is packed into mold and suppresses high titanium steel base type, pressure maintaining on electro-hydraulic formula press machine
3~5 minutes, then the high titanium steel blank suppressed is put into vacuum carbon tube furnace and is sintered high titanium steel finished product.When high titanium steel is sintered
Vacuum carbon tube furnace vacuum degree control is 10-3Pa shown in sintering temperature curve attached drawing 1, cools to 90 DEG C with the furnace and goes out after the completion of sintering
Furnace.
The chemical component and weight percent for the powder sintered titanium master alloy steel that the present embodiment is obtained by above-mentioned technique
It (wt%) is C:2.693%, Ti:5%, Cr:4%, Mo:3%, Nb:2%, surplus Fe.After tested, resulting titanium master alloy
The hardness number of steel is HRC 62, and bending strength 1300MPa, relative density is greater than 99%, the uniform texture of titanium master alloy steel
Property it is good, do not find that the segregation of apparent carbide composition and oxide are mingled with, inevitable impurity is micro, microcomponent
0.01wt% or so.
Embodiment 4:
A kind of titanium master alloy steel and titanium master alloy powdered steel sintering process, chemical component and weight percent of the present embodiment
Than (wt%) are as follows: C:4%, Ti:5.2%, Cr:3.5%, Mo:2.4%, Nb:1%, surplus Fe.It is specific the preparation method is as follows:
1) TiC (titanium carbide), Cr3C2 (chromium carbide), Mo2C (molybdenum carbide), NbC (niobium carbide), pure iron powder and pure carbon powder end is selected to make
For the raw material of powder sintered high titanium steel, powder diameter is 10~20 μm (micron).2) by selected raw material by the ratio in following table 2
Example is put into planetary ball mill and carries out ball milling mixing, and powder particle size is 4~8 μm after ball milling.
Table 2:
The content (wt%) of the feed components of powder sintered high titanium steel
6) it is added together with dehydrated alcohol in ball milling mixing material after melting heating paraffin, is tuned into pureed by stirring, so
After carry out insert sieve be granulated, mixture insert sieve be granulated partial size be 75~100 μm, mixture spherolite be put into drying box in 80 DEG C dry.
Wherein, paraffin, dehydrated alcohol, ball milling mixing material weight ratio be 7:40:100.
4) the high titanium steel raw material spherolite of powder is packed into mold and suppresses high titanium steel base type, pressure maintaining on electro-hydraulic formula press machine
3~5 minutes, then the high titanium steel blank suppressed is put into vacuum carbon tube furnace and is sintered high titanium steel finished product.When high titanium steel is sintered
Vacuum carbon tube furnace vacuum degree control is 10-3Pa shown in sintering temperature curve attached drawing 1, cools to 100 DEG C with the furnace and goes out after the completion of sintering
Furnace.
The chemical component and weight percent for the powder sintered titanium master alloy steel that the present embodiment is obtained by above-mentioned technique
It (wt%) is C:2.473%, Ti:6%, Cr:3%, Mo:2%, Nb:2%, surplus Fe.After tested, resulting titanium master alloy
The hardness number of steel is HRC 63.5, and bending strength 1280MPa, for relative density greater than 98%, the institutional framework of titanium master alloy steel is equal
Even property is good, does not find that the segregation of apparent carbide composition and oxide are mingled with, inevitable impurity be it is micro, micro group
Divide 0.01wt% or so.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to the one of invention
A little modifications and changes should also be as falling into the scope of the claims of the present invention.
Claims (9)
1. a kind of titanium master alloy steel, which is characterized in that the component including following weight percent: 2.3~4wt% of carbon C, titanium Ti
5~6wt%, 3~4wt% of chromium Cr, 2.3~4wt% of molybdenum Mo, niobium 1~2wt% of Nb, surplus are iron Fe.
2. a kind of titanium master alloy steel, which is characterized in that the component including following weight percent: carbon C 2.473wt%, titanium Ti
6wt%, chromium Cr 3wt%, molybdenum Mo 2wt%, niobium Nb 2wt%, surplus are iron Fe.
3. a kind of titanium master alloy steel, which is characterized in that the component including following weight percent: carbon C 2.703%wt%, titanium Ti
5.8wt%, chromium Cr 3.2wt%, molybdenum Mo 2.1wt%, niobium Nb 1.8wt%, surplus are iron Fe.
4. titanium master alloy steel a method according to any one of claims 1-3, which is characterized in that the titanium master alloy steel be by titanium carbide TiC,
Chromium carbide Cr3C2, molybdenum carbide Mo2C, niobium carbide NbC, pure iron powder and pure carbon powder are prepared for base-material.
5. a kind of powder sintering process of titanium master alloy steel, characterized in that it comprises the following steps:
S1: titanium carbide TiC, chromium carbide Cr3C2, molybdenum carbide Mo2C, niobium carbide NbC, pure iron powder and the conduct of pure carbon powder end are selected
The raw material of powder sintered high titanium steel, powder diameter are 10~20 μm；
S2: raw material selected by step S1 is put into planetary ball mill and carries out ball milling mixing, obtains ball milling mixing material, powder after ball milling
Partial size is 4~8 μm；
S3: being added in ball milling mixing material after heating paraffin is melted together with dehydrated alcohol, is tuned into pureed by stirring, carries out slotting
Sieve is granulated, and is later dried mixture spherolite, is obtained the high titanium steel raw material spherolite of powder；
S4: after the high titanium steel raw material spherolite of powder is packed into mold, high titanium steel base type is suppressed on electro-hydraulic formula press machine, later
The high titanium steel blank suppressed is put into be sintered and cooled in vacuum carbon tube furnace and is come out of the stove, titanium master alloy steel finished product is obtained.
6. the powder sintering process of titanium master alloy steel as claimed in claim 5, which is characterized in that selected in the step S2
The weight percent of raw material are as follows: titanium carbide TiC dosage be 7.536wt% wherein carbon content be 1.536wt%, chromium carbide Cr3C2
Dosage is that wherein carbon content is 0.154wt% to 3.154wt%, molybdenum carbide Mo2C dosage is that wherein carbon content is 2.125wt%
0.125wt%, niobium carbide NbC dosage be 2.258wt% wherein carbon content be 0.258wt%, pure iron powder 84.527wt% and
Pure carbon powder end 0.4wt%.
7. the powder sintering process of titanium master alloy steel as claimed in claim 5, which is characterized in that stone in the step S3
Wax, dehydrated alcohol, ball milling mixing material weight ratio be 3-8:20-40:100；The drying temperature is 80 DEG C.
8. the powder sintering process of titanium master alloy steel as claimed in claim 5, which is characterized in that suppressed in the step S4
It is the pressure maintaining of titanium steel base type 3~5 minutes high；Vacuum carbon tube furnace vacuum degree control is 10 when high titanium steel is sintered-3Pa；Cooling down tapping temperature is
80~100 DEG C.
9. the powder sintering process of titanium master alloy steel as claimed in claim 5, which is characterized in that the high titanium steel of the powder is former
The partial size of pellet grain is 75~100 μm.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103741042A (en) * | 2013-12-19 | 2014-04-23 | 马鞍山市方圆材料工程有限公司 | Alloy material for high wear-resistant cold rolls and preparation method thereof |
| CN105525219A (en) * | 2015-11-30 | 2016-04-27 | 王浩 | Molybdenum base alloy steel |
| CN107904476A (en) * | 2017-11-14 | 2018-04-13 | 史浩田 | A kind of chrome molybdenum base steel bonded carbide and preparation method thereof |
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- 2018-10-12 CN CN201811191999.7A patent/CN109266952A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103741042A (en) * | 2013-12-19 | 2014-04-23 | 马鞍山市方圆材料工程有限公司 | Alloy material for high wear-resistant cold rolls and preparation method thereof |
| CN105525219A (en) * | 2015-11-30 | 2016-04-27 | 王浩 | Molybdenum base alloy steel |
| CN107904476A (en) * | 2017-11-14 | 2018-04-13 | 史浩田 | A kind of chrome molybdenum base steel bonded carbide and preparation method thereof |
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Application publication date: 20190125 |