CN104907565A - Method for processing special-shaped SKD11 part - Google Patents
Method for processing special-shaped SKD11 part Download PDFInfo
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- CN104907565A CN104907565A CN201510194854.2A CN201510194854A CN104907565A CN 104907565 A CN104907565 A CN 104907565A CN 201510194854 A CN201510194854 A CN 201510194854A CN 104907565 A CN104907565 A CN 104907565A
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Abstract
The invention discloses a method for machining a special-shaped SKD11 part. A binding agent and SKD11 powder are put in a blender mixer to be mixed into ingredients. Injection moulding, degreasing and sintering are carried out. The binding agent comprises, by weight, 10 percent to 40 percent of polypropylene, 10 percent to 40 percent of polyethylene, one percent to ten percent of active agents and 10 percent to 40 percent of paraffin. The polypropylene, the polyethylene, the active agents and the paraffin are put in the blender mixer and mixed for one to four hours at the temperature of 140 DEG C to 160 DEG C to obtain the binding agent. The manufactured part is even in internal organization, the density can be 98 percent to 99.5 percent, the mechanical property is good, dimensional accuracy is high, surface smoothness is good, one-time forming is achieved, post machining is not needed, and cost is greatly lowered.
Description
Technical field
The present invention relates to steel field, specifically a kind of processing method of special-shaped SKD11 part.
Background technology
SKD11 is the general cold work die steel of high abrasion toughness, high carbon high chromium alloy tool steel and vacuum deaeration refining steel, and steel is pure, has the good hardenability that quenching degree is good, quenching distortion amount is little.This steel is through spheroidizing sofening treatment, and machinability is good, carbide particle fine uniform, need not worry hardening break intensified element molybdenum, holding of vanadium very add.The signal projector, laptop rotating shaft, auto parts and components etc. of communication are all special-shaped SKD11 parts, and require even density, dimensional accuracy is high.Adopt the technique of powder pressing forming, the signal projector, laptop rotating shaft, auto parts and components etc. of production communication are all that special-shaped part is not easy to make product density even, the boss of some position as little needs following process, and SKD11 hardness is large, processing difficulties, cost is high and not easily ensure the quality of products.
Summary of the invention
The object of the present invention is to provide the processing method of high, the one-time formed special-shaped SKD11 part of a kind of dimensional accuracy, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
A processing method for special-shaped SKD11 part, concrete steps comprise:
The preparation process of A, binding agent: raw material by weight percentage comprises: polypropylene 10-40%, polyethylene 10-40%, activating agent 1-10%, paraffin 10-40%, polypropylene, polyethylene, activating agent and paraffin are placed in batch mixer, at 140-160 DEG C of temperature, mix 1-4h;
B, batching: 48-50:52-60 takes binding agent and SKD11 powder by volume, is placed in batch mixer, at 140-160 DEG C of temperature, mix 4h, obtained batching;
C, injection moulding: above-mentioned batching is placed in injection (mo(u)lding) machine, forming temperature 160-180 DEG C, injection pressure 40-80MPa, under mould temperature 30-60 DEG C condition, be processed into blank;
D, degreasing: first blank is put into trichloro-ethylene and be heated to 40-60 DEG C, be detained 6h, dissolve the paraffin in binding agent, then blank is put in debinding furnace, 200-300 DEG C is heated to the programming rate of 5 DEG C/min under the protection of nitrogen, then be heated to 500-600 DEG C with the programming rate of 10-15 DEG C/min, obtain degreasing part;
E, sintering: degreasing part is heated to 800-900 DEG C and does pre-burning, be then placed in vacuum sintering furnace, be incubated 90min at temperature 1200 DEG C.
As the further scheme of the present invention: the preparation process of described binding agent: raw material by weight percentage comprises: polypropylene 30%, polyethylene 30%, paraffin 35%, all the other are activating agent, are placed in batch mixer, at 140-160 DEG C of temperature, mix 1h.
As the further scheme of the present invention: described activating agent adopts stearic acid.
Compared with prior art, the invention has the beneficial effects as follows: inside parts even tissue prepared by the present invention, density can reach 98-99.5%, good mechanical property, and dimensional accuracy is high, and surface smoothness is good, one-shot forming, without the need to aft-loaded airfoil, greatly reduces costs.
Detailed description of the invention
Below in conjunction with the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
In the embodiment of the present invention, a kind of processing method of special-shaped SKD11 part, concrete steps comprise:
The preparation process of A, binding agent: raw material by weight percentage comprises: polypropylene 10%, polyethylene 40%, stearic acid 10%, paraffin 40%, be placed in batch mixer by polypropylene, polyethylene, activating agent and paraffin, mixes 1h at 140 DEG C of temperature;
B, batching: 48:52 takes binding agent and SKD11 powder by volume, is placed in batch mixer, at 140 DEG C of temperature, mix 4h, obtained batching;
C, injection moulding: be placed in injection (mo(u)lding) machine by above-mentioned batching, under forming temperature 160 DEG C, injection pressure 40MPa, mould temperature 30 DEG C of conditions, be processed into blank;
D, degreasing: first blank is put into trichloro-ethylene and be heated to 40 DEG C, be detained 6h, dissolve the paraffin in binding agent, then blank is put in debinding furnace, 200 DEG C are heated to the programming rate of 5 DEG C/min under the protection of nitrogen, then be heated to 500 DEG C with the programming rate of 10 DEG C/min, obtain degreasing part;
E, sintering: degreasing part is heated to 800 DEG C and does pre-burning, be then placed in vacuum sintering furnace, be incubated 90min at temperature 1200 DEG C.
Embodiment 2
In the embodiment of the present invention, a kind of processing method of special-shaped SKD11 part, concrete steps comprise:
The preparation process of A, binding agent: raw material by weight percentage comprises: polypropylene 40%, polyethylene 20%, activating agent 1%, paraffin 39%, be placed in batch mixer by polypropylene, polyethylene, activating agent and paraffin, mixes 2h at 160 DEG C of temperature;
B, batching: 50:60 takes binding agent and SKD11 powder by volume, is placed in batch mixer, at 160 DEG C of temperature, mix 4h, obtained batching;
C, injection moulding: be placed in injection (mo(u)lding) machine by above-mentioned batching, under forming temperature 180 DEG C, injection pressure 80MPa, mould temperature 60 DEG C of conditions, be processed into blank;
D, degreasing: first blank is put into trichloro-ethylene and be heated to 60 DEG C, be detained 6h, dissolve the paraffin in binding agent, then blank is put in debinding furnace, 300 DEG C are heated to the programming rate of 5 DEG C/min under the protection of nitrogen, then be heated to 600 DEG C with the programming rate of 15 DEG C/min, obtain degreasing part;
E, sintering: degreasing part is heated to 800-900 DEG C and does pre-burning, be then placed in vacuum sintering furnace, be incubated 90min at temperature 1200 DEG C.
Embodiment 3
In the embodiment of the present invention, a kind of processing method of special-shaped SKD11 part, concrete steps comprise:
The preparation process of A, binding agent: raw material by weight percentage comprises: polypropylene 40%, polyethylene 40%, activating agent 10%, paraffin 10%, be placed in batch mixer by polypropylene, polyethylene, activating agent and paraffin, mixes 3h at 145 DEG C of temperature;
B, batching: 48.5:54 takes binding agent and SKD11 powder by volume, is placed in batch mixer, at 145 DEG C of temperature, mix 4h, obtained batching;
C, injection moulding: be placed in injection (mo(u)lding) machine by above-mentioned batching, under forming temperature 165 DEG C, injection pressure 50MPa, mould temperature 40 DEG C of conditions, be processed into blank;
D, degreasing: first blank is put into trichloro-ethylene and be heated to 45 DEG C, be detained 6h, dissolve the paraffin in binding agent, then blank is put in debinding furnace, 225 DEG C are heated to the programming rate of 5 DEG C/min under the protection of nitrogen, then be heated to 525 DEG C with the programming rate of 12 DEG C/min, obtain degreasing part;
E, sintering: degreasing part is heated to 825 DEG C and does pre-burning, be then placed in vacuum sintering furnace, be incubated 90min at temperature 1200 DEG C.
Embodiment 4
In the embodiment of the present invention, a kind of processing method of special-shaped SKD11 part, concrete steps comprise:
The preparation process of A, binding agent: raw material by weight percentage comprises: polypropylene 35%, polyethylene 35%, activating agent 10%, paraffin 20%, be placed in batch mixer by polypropylene, polyethylene, activating agent and paraffin, mixes 4h at 155 DEG C of temperature;
B, batching: 49.5:58 takes binding agent and SKD11 powder by volume, is placed in batch mixer, at 155 DEG C of temperature, mix 4h, obtained batching;
C, injection moulding: be placed in injection (mo(u)lding) machine by above-mentioned batching, under forming temperature 175 DEG C, injection pressure 70MPa, mould temperature 55 DEG C of conditions, be processed into blank;
D, degreasing: first blank is put into trichloro-ethylene and be heated to 55 DEG C, be detained 6h, dissolve the paraffin in binding agent, then blank is put in debinding furnace, 275 DEG C are heated to the programming rate of 5 DEG C/min under the protection of nitrogen, then be heated to 575 DEG C with the programming rate of 14 DEG C/min, obtain degreasing part;
E, sintering: degreasing part is heated to 875 DEG C and does pre-burning, be then placed in vacuum sintering furnace, be incubated 90min at temperature 1200 DEG C.
Embodiment 5
In the embodiment of the present invention, a kind of processing method of special-shaped SKD11 part, concrete steps comprise:
The preparation process of A, binding agent: raw material by weight percentage comprises: polypropylene 30%, polyethylene 30%, paraffin 35%, all the other are stearic acid, and polypropylene, polyethylene, activating agent and paraffin are placed in batch mixer, at 150 DEG C of mixing 1h.
B, batching: 49:56 takes binding agent and SKD11 powder by volume, is placed in batch mixer, at 150 DEG C of temperature, mix 4h, obtained batching;
C, injection moulding: be placed in injection (mo(u)lding) machine by above-mentioned batching, under forming temperature 170 DEG C, injection pressure 60MPa, mould temperature 45 DEG C of conditions, be processed into blank;
D, degreasing: first blank is put into trichloro-ethylene and be heated to 50 DEG C, be detained 6h, dissolve the paraffin in binding agent, then blank is put in debinding furnace, 250 DEG C are heated to the programming rate of 5 DEG C/min under the protection of nitrogen, then be heated to 550 DEG C with the programming rate of 12 DEG C/min, obtain degreasing part;
E, sintering: degreasing part is heated to 850 DEG C and does pre-burning, be then placed in vacuum sintering furnace, be incubated 90min at temperature 1200 DEG C.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.
In addition, be to be understood that, although this description is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should by description integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (3)
1. a processing method for special-shaped SKD11 part, it is characterized in that, concrete steps comprise:
The preparation process of A, binding agent: raw material by weight percentage comprises: polypropylene 10-40%, polyethylene 10-40%, activating agent 1-10%, paraffin 10-40%, polypropylene, polyethylene, activating agent and paraffin are placed in batch mixer, at 140-160 DEG C of temperature, mix 1-4h;
B, batching: 48-50:52-60 takes binding agent and SKD11 powder by volume, is placed in batch mixer, at 140-160 DEG C of temperature, mix 4h, obtained batching;
C, injection moulding: above-mentioned batching is placed in injection (mo(u)lding) machine, forming temperature 160-180 DEG C, injection pressure 40-80MPa, under mould temperature 30-60 DEG C condition, be processed into blank;
D, degreasing: first blank is put into trichloro-ethylene and be heated to 40-60 DEG C, be detained 6h, dissolve the paraffin in binding agent, then blank is put in debinding furnace, 200-300 DEG C is heated to the programming rate of 5 DEG C/min under the protection of nitrogen, then be heated to 500-600 DEG C with the programming rate of 10-15 DEG C/min, obtain degreasing part;
E, sintering: degreasing part is heated to 800-900 DEG C and does pre-burning, be then placed in vacuum sintering furnace, be incubated 90min at temperature 1200 DEG C.
2. the processing method of special-shaped SKD11 part according to claim 1, it is characterized in that, the preparation process of described binding agent: raw material by weight percentage comprises: polypropylene 30%, polyethylene 30%, paraffin 35%, all the other are activating agent, be placed in batch mixer, at 140-160 DEG C of temperature, mix 1h.
3. according to the processing method of the arbitrary described special-shaped SKD11 part of claim 1-2, it is characterized in that, described activating agent adopts stearic acid.
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| CN201510194854.2A CN104907565A (en) | 2015-04-23 | 2015-04-23 | Method for processing special-shaped SKD11 part |
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| CN201510194854.2A CN104907565A (en) | 2015-04-23 | 2015-04-23 | Method for processing special-shaped SKD11 part |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105251992A (en) * | 2015-11-25 | 2016-01-20 | 宁波渝鑫金属粉末科技有限公司 | Preparation method of alloy counterweight block injected and molded by powder |
| CN105268978A (en) * | 2015-11-25 | 2016-01-27 | 宁波渝鑫金属粉末科技有限公司 | Preparation method for piston by powder injection molding |
| CN105290391A (en) * | 2015-11-25 | 2016-02-03 | 宁波渝鑫金属粉末科技有限公司 | Method for manufacturing sampler through powder injection moulding |
| CN105345010A (en) * | 2015-11-25 | 2016-02-24 | 宁波渝鑫金属粉末科技有限公司 | Preparing method for electric connector molded through powder injection |
Citations (3)
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|---|---|---|---|---|
| CN1283536A (en) * | 2000-09-13 | 2001-02-14 | 湖南英捷高科技有限责任公司 | Technology for machining small shaped medical tools of stainless steel |
| CN102847945A (en) * | 2012-04-27 | 2013-01-02 | 宝得粉末注射成形（常熟）有限公司 | Processing method of special-shaped micro yarn feeding pipe |
| CN103846445A (en) * | 2012-12-03 | 2014-06-11 | 长沙聚众冶金科技有限公司 | Production method of high-length-diameter-ratio high-precision thin walled parts |
-
2015
- 2015-04-23 CN CN201510194854.2A patent/CN104907565A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1283536A (en) * | 2000-09-13 | 2001-02-14 | 湖南英捷高科技有限责任公司 | Technology for machining small shaped medical tools of stainless steel |
| CN102847945A (en) * | 2012-04-27 | 2013-01-02 | 宝得粉末注射成形（常熟）有限公司 | Processing method of special-shaped micro yarn feeding pipe |
| CN103846445A (en) * | 2012-12-03 | 2014-06-11 | 长沙聚众冶金科技有限公司 | Production method of high-length-diameter-ratio high-precision thin walled parts |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105251992A (en) * | 2015-11-25 | 2016-01-20 | 宁波渝鑫金属粉末科技有限公司 | Preparation method of alloy counterweight block injected and molded by powder |
| CN105268978A (en) * | 2015-11-25 | 2016-01-27 | 宁波渝鑫金属粉末科技有限公司 | Preparation method for piston by powder injection molding |
| CN105290391A (en) * | 2015-11-25 | 2016-02-03 | 宁波渝鑫金属粉末科技有限公司 | Method for manufacturing sampler through powder injection moulding |
| CN105345010A (en) * | 2015-11-25 | 2016-02-24 | 宁波渝鑫金属粉末科技有限公司 | Preparing method for electric connector molded through powder injection |
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