CN103692635A - High-wear-resistance iron boride alloy screw element for double-screw machine, and manufacturing method of iron boride alloy screw element - Google Patents

High-wear-resistance iron boride alloy screw element for double-screw machine, and manufacturing method of iron boride alloy screw element Download PDF

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Publication number
CN103692635A
CN103692635A CN201310703986.4A CN201310703986A CN103692635A CN 103692635 A CN103692635 A CN 103692635A CN 201310703986 A CN201310703986 A CN 201310703986A CN 103692635 A CN103692635 A CN 103692635A
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screw
feb alloy
layer
dual
machine
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章鹏
况敏
奚海江
盛文华
李玉梅
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章鹏
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50Details of extruders
    • B29C48/505Screws
    • B29C48/57Screws provided with kneading disc-like elements, e.g. with oval-shaped elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50Details of extruders
    • B29C48/505Screws
    • B29C48/507Screws characterised by the material or their manufacturing process
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50Details of extruders
    • B29C48/505Screws
    • B29C48/507Screws characterised by the material or their manufacturing process
    • B29C48/509Materials, coating or lining therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50Details of extruders
    • B29C48/505Screws
    • B29C48/54Screws with additional forward-feeding elements

Abstract

The invention discloses a high-wear-resistance iron boride alloy screw element for a double-screw machine. The iron boride alloy screw element comprises a body and an iron boride alloy layer; the iron boride alloy layer is evenly concentrically molten on the surface layer of the body, the overall thickness of the iron boride alloy layer is 50-150mum; the body is made of high-chromium high-carbon die steel which is Cr12MoV. The high-wear-resistance iron boride alloy screw element for the double-screw machine, disclosed by the invention, is used in industries of plastics, LED (Light-emitting Diode)s, cables, food, feeds, construction materials and the like, and the iron boride alloy screw element has a high wear resistance property, and is capable of greatly lowering the manufacture cost and application cost and greatly improving the production efficiency.

Description

FeB alloy screw element and the manufacture method thereof of high-wear resistance for dual-screw-stem machine
Technical field
The present invention relates to FeB alloy screw element for twin-screw extrusion (granulation) machine; Relate in particular to a kind of dual-screw-stem machine that uses machining and surfacing modification technology to make FeB alloy screw element and the manufacture method thereof of high-wear resistance.
Background technology
Along with the fast development of China's plastic cement industry, LED industry, line cable industry, food service industry, feedstuff industry, building material industry, thereby these industries equip that double screw extruder has changed that single-screw machine is pulverized widely in large quantities and low, the mixing lack of homogeneity of transfer efficiency, the not high defect of production capacity;
But the continuous upgrading along with dual-screw-stem machine, as machine rotational speed is brought up to 800~1000 revs/min by 400 revs/min, a large amount of glass, pottery, resin, nylon, contour wearing and tearing inserts of calcium carbonate of adding in the raw materials such as plastic cement, therefore the anti-wear performance of traditional high-speed steel screw element just cannot meet the demand of high speed dual-screw-stem machine operating mode, so invention high-wear resistance screw element becomes the task of top priority of industry;
The dual-screw-stem machine screw element of China mainly adopts 38CrMoAl nitrated steel and W at present 6mo 5cr 4v 2high-speed steel is made; the screw element that above-mentioned steel are made can be by Fast Wearing in the dual-screw-stem machine operating mode that contains the inserts media such as a large amount of glasses, pottery, resin, nylon, calcium carbonate; within general 2-3 month, must shut down and change screw element, have short and production product quality uniformity in the service life defect such as poor.
Summary of the invention
Poor these technical problems of product quality uniformity that the dual-screw-stem machine screw element anti-wear performance existing in prior art is low, service life is short in order to solve, produce, the invention provides FeB alloy screw element and the manufacture method thereof of high-wear resistance for a kind of dual-screw-stem machine.
In order to reach above-mentioned purpose of design, the technical solution used in the present invention is as follows:
A FeB alloy screw element for high-wear resistance for dual-screw-stem machine, comprises body, FeB alloy-layer; Described FeB alloy-layer is evenly melted in the top layer of body with one heart, and the integral thickness of described FeB alloy-layer is 50~150 μ m.
Further, described body is high chromium high-carbon mould steel, and described mould steel is Cr12MoV.
Further, described FeB alloy-layer is comprised of iron and boron.
Further, described body is by immersing salt bath furnace impregnated with molten FeB alloy-layer, and the solution compolision of described dipping is industrial borax 58~80%, electrolytic aluminium 4~12%, sodium chloride 8~15%, sodium carbonate 8~15%.
A manufacture method for the FeB alloy screw element of high-wear resistance for dual-screw-stem machine, comprises the following steps,
S1. mechanical processing technique: selection, cut, modified, draw internal spline, numerically controlled lathe machining, Cutting Parameters in NC Milling Machine processing, CNC machining, numerically control grinder grinding.
S2. salt bath impregnated with molten technique: pre-treatment, preheating, salt bath impregnated with molten FeB alloy-layer, post processing, except salt crust, digital control plain surface grinding machine converted products transverse plane.
Wherein, described S1 step specifically comprises,
A1: selection, according to salt bath impregnated with molten technique, to steel composition index request, the Cr12MoV mould steel of selecting high chromium high-carbon composition is screw element base material;
A2: cut steel billet by screw element product helical pitch length;
A3: the screw element steel billet to Cr12MoV carries out modified;
A4: broaching machine draws involute inner spline;
A5: numerically controlled lathe machining screw element steel billet;
A6: Cutting Parameters in NC Milling Machine processing screw element steel billet;
A7:CNC fine finishining screw element steel billet;
A8: numerically control grinder grinding screw element steel billet is to standard size, and surface roughness is Ra0.4.
Wherein, described S2 step specifically comprises,
B1: to S1 step process that qualified screw element steel billet quenches, the pre-treatment of lonneal, high tempering.
B2: by the preheating that is installed of the screw element steel billet through pre-treatment, preheat temperature is 150~200 ℃, and the time is 20 minutes;
B3: the screw element steel billet being installed after the pre-heat treatment is immersed to salt bath furnace impregnated with molten FeB alloy-layer; The solution compolision of dipping is industrial borax 58~80%, electrolytic aluminium 4~12%, sodium chloride 8~15%, sodium carbonate 8~15%, and impregnated with molten temperature is 900~1000 ℃, and the time is 8~10 hours;
B4: melting FeB alloy-layer screw element quenches to completing, the post processing of lonneal;
B5: salt bath melting FeB alloy screw element is entered to vacuum electric furnace except salt crust, and temperature is 800~880 ℃, and the time is 2~3 hours;
B6: digital control plain surface grinding machine converted products transverse plane, product transverse plane perpendicularity is 0.015MM.
Preferably, hardening heat is 900~1000 ℃ described in its B1 step, and the time is 2~3 hours; Low tempering temperatures is 180~300 ℃, and the time is 1~2 hour; High tempering temperature is 500~600 ℃, and the time is 1~2 hour.
Preferably, hardening heat is 900~1000 ℃ described in its B4 step, and the time is 2~3 hours; Low tempering temperatures is 180~300 ℃, and the time is 1~2 hour.
FeB alloy screw element low cost of manufacture for double screw extruder of the present invention, technique simple advanced, rational in infrastructure, cost performance is high, long service life, and Social benefit and economic benefit is remarkable, has a wide range of applications and promotional value; Double screw extruder of the present invention is advanced, reasonable by the manufacturing process of FeB alloy screw element, and production process does not produce waste gas, waste water, waste residue, meets China's energy-conserving and environment-protective fundamental state policy.
Accompanying drawing explanation
Fig. 1 is screw thread block structured schematic diagram in the FeB alloy screw element of high-wear resistance for dual-screw-stem machine of the present invention;
Fig. 2 is the schematic cross-section of Fig. 1 threaded block;
Fig. 3 meshes block structured schematic diagram in the FeB alloy screw element of dual-screw-stem machine of the present invention with high-wear resistance;
Fig. 4 is the schematic cross-section of Fig. 3 gear block;
Fig. 5 is the generalized section of the FeB alloy screw element of high-wear resistance for dual-screw-stem machine of the present invention;
Fig. 6 is the production technological process of the FeB alloy screw element of high-wear resistance for dual-screw-stem machine of the present invention.
The specific embodiment
Below in conjunction with Figure of description, the specific embodiment of the present invention is described in detail.Obviously, described embodiment is only a part of embodiment of the present invention, and other embodiment that those skilled in the art obtains under the prerequisite of not paying creative work, belongs to protection scope of the present invention.
The FeB alloy screw element of high-wear resistance for the dual-screw-stem machine that the present invention is comprised of threaded block and gear block as Figure 1-4, dual-screw-stem machine of the present invention comprises body 102, FeB alloy-layer 101 with the FeB alloy screw element of high-wear resistance as shown in Figure 5; Described FeB alloy-layer 101 is evenly melted in the surface of body 102 with one heart, and the integral thickness of described FeB alloy-layer 101 is 50~150 μ m; Described body 102 is high chromium high-carbon mould steel, and described mould steel is Cr12MoV; Described FeB alloy-layer 101 is comprised of compositions such as iron and boron; Described body is by immersing salt bath furnace impregnated with molten FeB alloy-layer, and the solution compolision of described dipping is industrial borax 58~80%, electrolytic aluminium 4~12%, sodium chloride 8~15%, sodium carbonate 8~15%.
As shown in Figure 6, the manufacture method of the FeB alloy screw element of high-wear resistance for dual-screw-stem machine, comprises the following steps,
S1. mechanical processing technique: selection, cut, modified, draw internal spline, numerically controlled lathe machining, Cutting Parameters in NC Milling Machine processing, CNC machining, numerically control grinder grinding.
S2. salt bath impregnated with molten technique: pre-treatment, preheating, salt bath impregnated with molten FeB alloy-layer, post processing, except salt crust, digital control plain surface grinding machine converted products transverse plane.
Wherein, described S1 step specifically comprises,
A1: selection, according to salt bath impregnated with molten technique, to steel composition index request, the Cr12MoV mould steel of selecting high chromium high-carbon composition is screw element base material;
A2: cut steel billet by screw element product helical pitch length;
A3: the screw element steel billet to Cr12MoV carries out modified;
A4: broaching machine draws involute inner spline;
A5: numerically controlled lathe machining screw element steel billet;
A6: Cutting Parameters in NC Milling Machine processing screw element steel billet;
A7:CNC fine finishining screw element steel billet;
A8: numerically control grinder grinding screw element steel billet is to standard size, and surface roughness is Ra0.4.
Wherein, described S2 step specifically comprises,
B1: to S1 step process that qualified screw element steel billet quenches, the pre-treatment of lonneal, high tempering, hardening heat is 900~1000 ℃, the time is 2~3 hours; Low tempering temperatures is 180~300 ℃, and the time is 1~2 hour; High tempering temperature is 500~600 ℃, and the time is 1~2 hour.
B2: by the preheating that is installed of the screw element steel billet through pre-treatment, preheat temperature is 150~200 ℃, and the time is 20 minutes;
B3: the screw element steel billet being installed after the pre-heat treatment is immersed to salt bath furnace impregnated with molten FeB alloy-layer; The solution compolision of dipping is industrial borax 58~80%, electrolytic aluminium 4~12%, sodium chloride 8~15%, sodium carbonate 8~15%, and impregnated with molten temperature is 900~1000 ℃, and the time is 8~10 hours;
B4: melting FeB alloy-layer screw element quenches to completing, the post processing of lonneal, and hardening heat is 900~1000 ℃, and the time is 2~3 hours; Low tempering temperatures is 180~300 ℃, and the time is 1~2 hour;
B5: salt bath melting FeB alloy screw element is entered to vacuum electric furnace except salt crust, and temperature is 800~880 ℃, and the time is 2~3 hours;
B6: digital control plain surface grinding machine converted products transverse plane, product transverse plane perpendicularity is 0.015MM.
FeB alloy screw element and 38CrMoAl and W for double screw extruder of the present invention 6mo 5cr 4v 2the all Performance Ratios of screw element are compared with list:
Dual-screw-stem machine of the present invention is better than W greatly with FeB alloy screw element anti-wear performance 6mo 5cr 4v 2the like product that high-speed steel and 38CrMoAl nitrated steel are made, adopting the screw element anti-wear performance of Cr12MoV steel billet salt bath melting FeB alloy new technology, new technology manufacture is W 6mo 5cr 4v 2the more than 2 times of high-speed steel like product, manufacturing cost is only high speed steel W 6mo 5cr 4v 250%.
Above; be only preferred embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, all should be encompassed in protection scope of the present invention in.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claim was defined.

Claims (9)

1. a FeB alloy screw element for high-wear resistance for dual-screw-stem machine, is characterized in that: comprise body, FeB alloy-layer; Described FeB alloy-layer is evenly melted in the top layer of body with one heart, and the integral thickness of described FeB alloy-layer is 50~150 μ m.
2. the FeB alloy screw element of high-wear resistance for dual-screw-stem machine according to claim 1, is characterized in that: described body is high chromium high-carbon mould steel, and described mould steel is Cr12MoV.
3. the FeB alloy screw element of high-wear resistance for dual-screw-stem machine according to claim 1, is characterized in that: described FeB alloy-layer is comprised of iron and boron.
4. the FeB alloy screw element of high-wear resistance for dual-screw-stem machine according to claim 1, it is characterized in that: described body is by immersing salt bath furnace impregnated with molten FeB alloy-layer, and the solution compolision of described dipping is industrial borax 58~80%, electrolytic aluminium 4~12%, sodium chloride 8~15%, sodium carbonate 8~15%.
5. a manufacture method for the FeB alloy screw element of high-wear resistance for dual-screw-stem machine, is characterized in that: comprises the following steps,
S1. mechanical processing technique: selection, cut, modified, draw internal spline, numerically controlled lathe machining, Cutting Parameters in NC Milling Machine processing, CNC machining, numerically control grinder grinding.
S2. salt bath impregnated with molten technique: pre-treatment, preheating, salt bath impregnated with molten FeB alloy-layer, post processing, except salt crust, digital control plain surface grinding machine converted products transverse plane.
6. the manufacture method of the FeB alloy screw element of high-wear resistance for dual-screw-stem machine according to claim 5, is characterized in that: described S1 step specifically comprises,
A1: selection, according to salt bath impregnated with molten technique, to steel composition index request, the Cr12MoV mould steel of selecting high chromium high-carbon composition is screw element base material;
A2: cut steel billet by screw element product helical pitch length;
A3: the screw element steel billet to Cr12MoV carries out modified;
A4: broaching machine draws involute inner spline;
A5: numerically controlled lathe machining screw element steel billet;
A6: Cutting Parameters in NC Milling Machine processing screw element steel billet;
A7:CNC fine finishining screw element steel billet;
A8: numerically control grinder grinding screw element steel billet is to standard size, and surface roughness is Ra0.4.
7. the manufacture method of the FeB alloy screw element of high-wear resistance for dual-screw-stem machine according to claim 5, is characterized in that: described S2 step specifically comprises,
B1: to S1 step process that qualified screw element steel billet quenches, the pre-treatment of lonneal, high tempering.
B2: by the preheating that is installed of the screw element steel billet through pre-treatment, preheat temperature is 150~200 ℃, and the time is 20 minutes;
B3: the screw element steel billet being installed after the pre-heat treatment is immersed to salt bath furnace impregnated with molten FeB alloy-layer; The solution compolision of dipping is industrial borax 58~80%, electrolytic aluminium 4~12%, sodium chloride 8~15%, sodium carbonate 8~15%, and impregnated with molten temperature is 900~1000 ℃, and the time is 8~10 hours;
B4: melting FeB alloy-layer screw element quenches to completing, the post processing of lonneal;
B5: salt bath melting FeB alloy screw element is entered to vacuum electric furnace except salt crust, and temperature is 800~880 ℃, and the time is 2~3 hours;
B6: digital control plain surface grinding machine converted products transverse plane, product transverse plane perpendicularity is 0.015MM.
8. the manufacture method of the FeB alloy screw element of high-wear resistance for dual-screw-stem machine according to claim 7, is characterized in that: described in its B1 step, hardening heat is 900~1000 ℃, and the time is 2~3 hours; Low tempering temperatures is 180~300 ℃, and the time is 1~2 hour; High tempering temperature is 500~600 ℃, and the time is 1~2 hour.
9. the manufacture method of the FeB alloy screw element of high-wear resistance for dual-screw-stem machine according to claim 7, is characterized in that: described in its B4 step, hardening heat is 900~1000 ℃, and the time is 2~3 hours; Low tempering temperatures is 180~300 ℃, and the time is 1~2 hour.
CN201310703986.4A 2013-12-18 2013-12-18 High-wear-resistance iron boride alloy screw element for double-screw machine, and manufacturing method of iron boride alloy screw element Pending CN103692635A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105499910A (en) * 2014-09-22 2016-04-20 石台县熠翔机械制造有限公司 Screw machining process for industrial oil pumps
CN106319182A (en) * 2016-04-27 2017-01-11 上海汇众汽车制造有限公司 Mold manufacturing method for preventing stamping workpiece surface galling
WO2021030693A3 (en) * 2019-08-14 2021-03-25 Entek Manufacturing Llc Additively manufacuted extruder components

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03223403A (en) * 1990-01-26 1991-10-02 Sumitomo Heavy Ind Ltd Manufacture of screw for plastic forming machine and method for forming alloy layer
CN1092819A (en) * 1993-03-19 1994-09-28 福建省冶金工业研究所 Salt bath process for rare-earth-vanadium-boron co-diffusion
WO2012013058A1 (en) * 2010-07-26 2012-02-02 Zhang Peng Remelting type thread element for parallel dual-screw extruder and manufacturing method thereof
CN203937163U (en) * 2013-12-18 2014-11-12 章鹏 The FeB alloy screw element of high-wear resistance for dual-screw-stem machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03223403A (en) * 1990-01-26 1991-10-02 Sumitomo Heavy Ind Ltd Manufacture of screw for plastic forming machine and method for forming alloy layer
CN1092819A (en) * 1993-03-19 1994-09-28 福建省冶金工业研究所 Salt bath process for rare-earth-vanadium-boron co-diffusion
WO2012013058A1 (en) * 2010-07-26 2012-02-02 Zhang Peng Remelting type thread element for parallel dual-screw extruder and manufacturing method thereof
CN203937163U (en) * 2013-12-18 2014-11-12 章鹏 The FeB alloy screw element of high-wear resistance for dual-screw-stem machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105499910A (en) * 2014-09-22 2016-04-20 石台县熠翔机械制造有限公司 Screw machining process for industrial oil pumps
CN105499910B (en) * 2014-09-22 2019-03-26 石台县熠翔机械制造有限公司 A kind of screw rod processing technology for industrial oil pump
CN106319182A (en) * 2016-04-27 2017-01-11 上海汇众汽车制造有限公司 Mold manufacturing method for preventing stamping workpiece surface galling
WO2021030693A3 (en) * 2019-08-14 2021-03-25 Entek Manufacturing Llc Additively manufacuted extruder components

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