CN109722605A - A kind of molten infiltration combination method of powder metallurgy - Google Patents
A kind of molten infiltration combination method of powder metallurgy Download PDFInfo
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- CN109722605A CN109722605A CN201910118964.9A CN201910118964A CN109722605A CN 109722605 A CN109722605 A CN 109722605A CN 201910118964 A CN201910118964 A CN 201910118964A CN 109722605 A CN109722605 A CN 109722605A
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Abstract
The invention discloses a kind of molten infiltration combination methods of powder metallurgy, including raw material to mix, compression moulding, sintering, infiltration copper and etc.；The raw material amine weight ratio is iron powder 90-100 parts, 1.0-1.5 parts of graphene, 0.05-0.1 parts of lanthana, 1.0-1.5 parts of vanadium powder, 0.5-1.0 parts of cobalt powder, chromium powder 1.0-1.5%, 1.0-1.5 parts of zinc powder, 1.5-2.0 parts of calcium oxide, 2.0-3.0 parts of magnesium powder, 0.1-0.2 parts of titanium carbide, 0.05-0.1 parts of aluminium nitride, 0.5-0.6 parts of lubricant；The copper seeping agent is 90-100 parts of copper powder, 2.0-3.0 parts of iron powder, 0.5-1.0 parts of nickel powder, 0.5-1.0 parts of manganese powder, 0.5-1.0 parts of molybdenum powder, 0.5-1.0 parts of aluminium powder, 0.5-1.0 parts of glass putty, 0.5-0.6 parts of zinc stearate powder by weight.The method of the invention composition of raw materials is reasonable, simple process, high production efficiency, and the part for producing preparation has the characteristics that intensity, hardness, wear-resisting, impact resistance is excellent.
Description
Technical field
The present invention relates to powder metallurgical technology more particularly to a kind of molten infiltration combination methods of powder metallurgy.
Background technique
With the development of PM technique, powder metallurgy structural part is iron-based using more and more extensive in every profession and trade
The application of powdered metal parts provides bigger market.Meanwhile requirement of the market to powdered metal parts performance is also increasingly
Height, not requiring nothing more than components has good wearability, impact resistance, also requires components intensity with higher and hardness.
But using conventional compacting-sintering process manufacture powder metallurgy components, it can not reach fully dense in pressing process
State, wherein remaining hole will affect the performance of powder metallurgy components, often there is intensity in ferrous based powder metallurgical components
Not high, the problems such as hardness is insufficient, it is caused not to be able to satisfy requirement.Therefore, eliminating or reduce its residual porosity is to obtain height
Compactness, the most effective approach of high performance sintered steel, and copper infiltration is exactly a kind of common methods.
Studies have shown that hole in sintered steel can be significantly reduced or eliminate by carrying out infiltration with copper or copper alloy powder foot couple sintered steel
Gap improves density, improves its mechanical property and dynamic performance (such as impact flexibility, fatigue).It is multiple to seep the more traditional multiple pressure of copper
The densification processes such as burning, power forging, temperature and pressure have many advantages, such as that at low cost, process is simple, easily adjustment, therefore this method is from upper
Century the forties the U.S. come out since, application range is growing, and has become production high-performance Fe-based powder metallurgy at present
The indispensable densification process of components.
Summary of the invention
The purpose of the present invention is to provide a kind of molten infiltration combination methods of powder metallurgy, and the method composition of raw materials is reasonable,
Simple process, high production efficiency, the part for producing preparation have the characteristics that intensity, hardness, wear-resisting, impact resistance is excellent.
In order to achieve the above objectives, the technical solution of the present invention is as follows:
A kind of molten infiltration combination method of powder metallurgy, includes the following steps:
S1, raw material mixing: weighing 90-100 parts of iron powder, and 1.0-1.5 parts of graphene, 0.05-0.1 parts of lanthana, vanadium powder
1.0-1.5 parts, 0.5-1.0 parts of cobalt powder, chromium powder 1.0-1.5%, 1.0-1.5 parts of zinc powder, 1.5-2.0 parts of calcium oxide, magnesium powder 2.0-
3.0 parts, 0.1-0.2 parts of titanium carbide, 0.05-0.1 parts of aluminium nitride, 0.5-0.6 parts of lubricant are added in high speed ball mill and grind
It is uniformly mixed, obtains mixed-powder material.
S2, compacting: compacting tool set inner wall is infiltrated with powder metallurgy release agent, mixture obtained by S1 is then added to compacting
It is pressed in mold and blank is made, the pressing pressure is 400-500MPa, pressed density 6.5-7.3g/cm3；
S3, sintering: blank made from S2 is put into progress vacuum-sintering in vacuum sintering furnace, semi-finished product, the burning is made
Junction temperature is 1200 DEG C；
S4, it seeps copper: semi-finished product made from S3 being put into progress copper infiltration in infiltration copper furnace and obtain the product piece of function admirable.
Preferably, the lubricant in the S1 is EBS wax.
Preferably, the revolving speed of the S1 high speed ball mill is 400r/min, and the ground and mixed time is 2-3h.
Preferably, in the S3 sintering process, vacuum degree is -0.08Mpa to -1.0MPa.
Preferably, sintering process in the S3 are as follows: be first warming up to 200-220 DEG C of pre-sintering 30-40min, then be warming up to
800-820 DEG C of sintering 30-40min, then 1200 DEG C of sintering 90-120min are warming up to, it is cooled to 600-620 DEG C of heat preservation 30-40min
It is down to room temperature again afterwards.
Preferably, the heating rate that 200-220 DEG C is warming up in the S3 is 5-6 DEG C/min, is warming up to 800-820 DEG C
Heating rate is 15-20 DEG C/min, and 1200 DEG C of heating rate is 15-20 DEG C/min.
Preferably, the composition by weight of the copper seeping agent in the S4 are as follows: 90-100 parts of copper powder, 2.0-3.0 parts of iron powder, nickel
0.5-1.0 parts of powder, 0.5-1.0 parts of manganese powder, 0.5-1.0 parts of molybdenum powder, 0.5-1.0 parts of aluminium powder, 0.5-1.0 parts of glass putty, zinc stearate
0.5-0.6 parts of powder.
Preferably, the infiltration copper mode in the S4 carries out copper infiltration by the way of bottom and top simultaneously infiltration.
Preferably, infiltrating temperature is 1150 DEG C in the S4, and the infiltration time is 30-40min, and infiltration atmosphere is to put hot gas
Atmosphere.
The invention has the benefit that the method for the invention composition of raw materials is reasonable, simple process, high production efficiency are raw
The part for producing preparation has the characteristics that intensity, hardness, wear-resisting, impact resistance is excellent.The present invention is risen in sintering using segmentation
The mode of temperature carries out, and air and lubricant inside slug press part can be made completely to exclude, prevent slug press part from burning
Cracked situation when knot；The present invention carries out infiltration copper by the way of bottom and top simultaneously infiltration, and it is more preferable to seep copper effect；This hair
It is bright that using seeping from the copper seeping agent ground, copper is high-efficient, and infiltration copper effect is good, non-corrosive；Oxidation is added in the present invention in blank raw material
Infiltration copper effect when seeping copper can be improved in lanthanum.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with specific embodiment, it is clear that described
Embodiment be only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiment of the present invention, this field
Those of ordinary skill's every other embodiment obtained, belongs to protection scope of the present invention.
Embodiment 1
A kind of molten infiltration combination method of powder metallurgy, includes the following steps:
S1, raw material mixing: weighing 90 parts of iron powder, and 1.0 parts of graphene, 0.1 part of lanthana, 1.0 parts of vanadium powder, 0.5 part of cobalt powder,
1.5 parts of chromium powder, 1.0 parts of zinc powder, 2.0 parts of calcium oxide, 2.0 parts of magnesium powder, 0.2 part of titanium carbide, 0.1 part of aluminium nitride, 0.6 part of lubricant
Being added to and controlling the revolving speed of grinding machine in high speed ball mill is 400r/min, and the ground and mixed time is 2-3h, obtains mixed-powder material.
S2, compacting: compacting tool set inner wall is infiltrated with powder metallurgy release agent, mixture obtained by S1 is then added to compacting
It is pressed in mold and blank is made, the pressing pressure is 400-500MPa, pressed density 6.5-7.3g/cm3；
S3, sintering: blank made from S2 is put into progress vacuum-sintering in vacuum sintering furnace, semi-finished product is made, control is true
Reciprocal of duty cycle is -0.08Mpa to -1.0MPa, is first warming up to 200-220 DEG C of pre-sintering 30-40min, and heating rate is 5-6 DEG C/min；
It is warming up to 800-820 DEG C of sintering 30-40min again, heating rate is 15-20 DEG C/min；It is warming up to 1200 DEG C of sintering 90- again
120min, heating rate are 15-20 DEG C/min；It is down to room temperature again after being cooled to 600-620 DEG C of heat preservation 30-40min.
S4, seep copper: semi-finished product made from S3 are put into seep copper furnace using bottom and top and meanwhile by the way of infiltration in carry out
Copper infiltration obtains the product piece of function admirable, and the infiltration copper temperature is 1150 DEG C, and the infiltration copper time is 30-40min, seeps copper atmosphere
For heat release atmosphere.
Lubricant in the S1 is EBS wax.
Powder metallurgy release agent in the S2 is stearic acid.
Copper seeping agent in the S4 is poidometer, 90 parts of copper powder, 2.0 parts of iron powder, and 1.0 parts of nickel powder, 0.5 part of manganese powder, molybdenum powder
1.0 parts, 0.5 part of aluminium powder, 0.5 part of glass putty, powder materials obtained by 0.5 part of ground and mixed of zinc stearate powder.
Embodiment 2
A kind of molten infiltration combination method of powder metallurgy, includes the following steps:
S1, raw material mixing: weighing 100 parts of iron powder, and 1.5 parts of graphene, 0.05 part of lanthana, 1.5 parts of vanadium powder, cobalt powder 1.0
Part, 1.0 parts of chromium powder, 1.5 parts of zinc powder, 1.5 parts of calcium oxide, 3.0 parts of magnesium powder, 0.1 part of titanium carbide, 0.05 part of aluminium nitride, lubricant
0.5 part of revolving speed for being added to control grinding machine in high speed ball mill is 400r/min, and the ground and mixed time is 2-3h, obtains mixed powder
End material.
S2, compacting: compacting tool set inner wall is infiltrated with powder metallurgy release agent, mixture obtained by S1 is then added to compacting
It is pressed in mold and blank is made, the pressing pressure is 400-500MPa, pressed density 6.5-7.3g/cm3；
S3, sintering: blank made from S2 is put into progress vacuum-sintering in vacuum sintering furnace, semi-finished product is made, control is true
Reciprocal of duty cycle is -0.08Mpa to -1.OMPa, is first warming up to 200-220 DEG C of pre-sintering 30-40min, and heating rate is 5-6 DEG C/min；
It is warming up to 800-820 DEG C of sintering 30-40min again, heating rate is 15-20 DEG C/min；It is warming up to 1200 DEG C of sintering 90- again
120min, heating rate are 15-20 DEG C/min；It is down to room temperature again after being cooled to 600-620 DEG C of heat preservation 30-40min.
S4, seep copper: semi-finished product made from S3 are put into seep copper furnace using bottom and top and meanwhile by the way of infiltration in carry out
Copper infiltration obtains the product piece of function admirable, and the infiltration copper temperature is 1150 DEG C, and the infiltration copper time is 30-40min, seeps copper atmosphere
For heat release atmosphere.
Lubricant in the S1 is EBS wax.
Powder metallurgy release agent in the S2 is stearic acid.
Copper seeping agent in the S4 is poidometer, 100 parts of copper powder, 3.0 parts of iron powder, and 0.5 part of nickel powder, 1.0 parts of manganese powder, molybdenum powder
1.0 parts, 1.0 parts of aluminium powder, 1.0 parts of glass putty, powder materials obtained by 0.6 part of ground and mixed of zinc stearate powder.
The part prepared using the method for the invention is subjected to performance detection, as the result is shown Ultimate Tensile power intensity
Greater than 1400MPa, yield strength is greater than 1400MPa, and hardness is greater than 105HRB, and fatigue strength is greater than 550MPa, toughness
Greater than 16J/cm2。
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, all any modification, equivalent substitution, improvement and etc. be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of molten infiltration combination method of powder metallurgy, which comprises the steps of:
S1, raw material mixing: weighing 90-100 parts of iron powder, and 1.0-1.5 parts of graphene, 0.05-0.1 parts of lanthana, vanadium powder 1.0-1.5
Part, 0.5-1.0 parts of cobalt powder, chromium powder 1.0-1.5%, 1.0-1.5 parts of zinc powder, 1.5-2.0 parts of calcium oxide, 2.0-3.0 parts of magnesium powder, carbon
Changing titanium 0.1-0.2 parts, 0.05-0.1 parts of aluminium nitride, 0.5-0.6 parts of lubricant to be added to ground and mixed in high speed ball mill uniform,
Obtain mixed-powder material.
S2, compacting: compacting tool set inner wall is infiltrated with powder metallurgy release agent, mixture obtained by S1 is then added to compacting tool set
In be pressed blank be made, the pressing pressure is 400-500MPa, pressed density 6.5-7.3g/cm3；
S3, sintering: blank made from S2 is put into progress vacuum-sintering in vacuum sintering furnace, semi-finished product, the sintering temperature is made
Degree is 1200 DEG C；
S4, it seeps copper: semi-finished product made from S3 being put into progress copper infiltration in infiltration copper furnace and obtain the product piece of function admirable.
2. the molten infiltration combination method of powder metallurgy as described in claim 1, which is characterized in that the lubricant in the S1 is
EBS wax.
3. such as the molten infiltration combination method of the described in any item powder metallurgy of claim 1 to 2, which is characterized in that high in the S1
The revolving speed of fast ball mill is 400r/min, and the ground and mixed time is 2-3h.
4. such as the molten infiltration combination method of the described in any item powder metallurgy of claim 1 to 2, which is characterized in that the S3 sintering
In the process, vacuum degree is -0.08Mpa to -1.0MPa.
5. the molten infiltration combination method of powder metallurgy as claimed in claim 4, which is characterized in that sintering process in the S3 are as follows:
It is first warming up to 200-220 DEG C of pre-sintering 30-40min, then is warming up to 800-820 DEG C of sintering 30-40min, then be warming up to 1200 DEG C
It is sintered 90-120min, is down to room temperature again after being cooled to 600-620 DEG C of heat preservation 30-40min.
6. the molten infiltration combination method of powder metallurgy as claimed in claim 5, which is characterized in that be warming up to 200- in the S3
220 DEG C of heating rate is 5-6 DEG C/min, and the heating rate for being warming up to 800-820 DEG C is 15-20 DEG C/min, 1200 DEG C of liter
Warm rate is 15-20 DEG C/min.
7. the molten infiltration combination method of powder metallurgy as claimed in claim 6, which is characterized in that the group of the copper seeping agent in the S4
Divide by weight are as follows: 90-100 parts of copper powder, 2.0-3.0 parts of iron powder, 0.5-1.0 parts of nickel powder, 0.5-1.0 parts of manganese powder, molybdenum powder 0.5-
1.0 parts, 0.5-1.0 parts of aluminium powder, 0.5-1.0 parts of glass putty, 0.5-0.6 parts of zinc stearate powder.
8. the molten infiltration combination method of powder metallurgy as claimed in claim 7, which is characterized in that the infiltration copper mode in the S4 is adopted
Copper infiltration is carried out with the mode of bottom and top while infiltration.
9. such as the molten infiltration combination method for the powder metallurgy that claim 8 is stated, which is characterized in that infiltrating temperature is 1150 in the S4
DEG C, the infiltration time is 30-40min, and infiltration atmosphere is heat release atmosphere.
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| CN111570798A (en) * | 2020-06-28 | 2020-08-25 | 南通旺鑫新材料有限公司 | Powder metallurgy solution infiltration bonding method |
| CN111872371A (en) * | 2020-07-28 | 2020-11-03 | 青志(无锡)粉末铸锻有限公司 | Production process of clamping jaw for woodworking machine |
| CN113967743A (en) * | 2021-03-05 | 2022-01-25 | 暨南大学 | Wear-resistant 316 stainless steel part with complex structural shape and preparation method and application thereof |
| CN115074599A (en) * | 2022-06-27 | 2022-09-20 | 西安西电高压开关有限责任公司 | Copper-iron alloy of iron framework and preparation method thereof |
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Cited By (6)
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| CN113967743A (en) * | 2021-03-05 | 2022-01-25 | 暨南大学 | Wear-resistant 316 stainless steel part with complex structural shape and preparation method and application thereof |
| CN113967743B (en) * | 2021-03-05 | 2023-08-18 | 暨南大学 | Structure-shape complex and abrasion-resistant 316 stainless steel part and preparation method and application thereof |
| CN115074599A (en) * | 2022-06-27 | 2022-09-20 | 西安西电高压开关有限责任公司 | Copper-iron alloy of iron framework and preparation method thereof |
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