CN103194663A - Improved pulverizer knife holder and production method thereof - Google Patents
Improved pulverizer knife holder and production method thereof Download PDFInfo
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- CN103194663A CN103194663A CN2013100722605A CN201310072260A CN103194663A CN 103194663 A CN103194663 A CN 103194663A CN 2013100722605 A CN2013100722605 A CN 2013100722605A CN 201310072260 A CN201310072260 A CN 201310072260A CN 103194663 A CN103194663 A CN 103194663A
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Abstract
The invention provides an improved pulverizer knife holder and a production method thereof. The pulverizer knife holder is an iron casting and comprises the following chemical components by weight percent: 3.2-4.0 % of C, 2.1-3.1 % of Si, less than or equal to 0.4 % of Mn, less than or equal to 0.05 % of P, less than or equal to 0.02 % of S, 0.035-0.05 % of Mg, 0. 01-0.05 % of Cu, 0.001-0.02 % of Ni, and trace rare earth element (or including Ba element as well). During a casting process of the pulverizer knife holder, trace rare earth element or trace Ba element is added, thereby obtaining relatively high intensity and hardness, and good toughness, especially with a percentage elongation being up to 16 %.
Description
Technical field
The present invention relates to a kind of disintegrating apparatus parts, relate in particular to a kind of pulverizing knife rest and production method thereof with very good mechanical properties.
Background technology
Use cutter that object is pulverized and in growing field, obtain to use, as the fragmentation of objects such as plastics, rubbish, paper, vegetation, meat, vegetables, cereal.
Disclose a kind of gang tool of pulverizing plastics as patent CN102091667A, comprised big blade and be spliced into the pocket knife section by small blade, big blade and pocket knife section are rotated synchronously, and the cutter groove by push type broach cooperates to realize blank with the sound of blade.Blade in the high speed rotating process, blade with pulverize after material contacts, blade is easy to destroy, in this patented technology, the blade volume is big, blade damages the back just to be needed all to change.For this reason, patent CN102836756A discloses a kind of grinder blade, about be provided with symmetrical open holes, and the cutting edge of blade is stepped, to prolong the work-ing life of blade.
Patent CN101168140B, CN102224783A, CN102870556A disclose a kind of pulverizer respectively, and blade is installed on the knife rest, and knife rest is installed on the transmission shaft, and knife rest drives the blade high speed rotating, to realize pulverizing function; Can significantly reduce the area of blade.
But knife rest drives in the blade high speed rotating process, because centrifugal force and wearing and tearing can cause knife rest job stability variation, and degradation, therefore, knife rest needs excellent mechanical property, as higher intensity, hardness and toughness.
Patent CN101619372A discloses a kind of method that improves spheroidal graphite cast iron toughness, uses three kinds of nucleating agents simultaneously, and products obtained therefrom has very high intensity, can be used for the component in multiple field, but unit elongation only is 6%, and toughness is still relatively poor.Patent CN101519708B discloses a kind of method that improves spheroidal graphite cast iron toughness, and can access tensile strength is that 570-590MPa, unit elongation are about 8% iron casting, but toughness still remains to be improved.
Therefore, still need a kind of high tenacity, high-intensity pulverizer knife rest and production method thereof.
Summary of the invention
At the problem of present pulverizer knife rest bad mechanical property, the invention provides the method for a kind of production high strength, high tenacity pulverizer knife rest.
First aspect of the present invention provides a kind of improved pulverizer knife rest, and described pulverizer knife rest is iron casting, and according to weight percent, chemical ingredients comprises in the described knife rest: C3.2-4.0% is preferably 2.4-3.7%, more preferably 3.5-3.6%; Si2.1-3.1%, 2.3-3.0% more preferably, 2.5-2.9% more preferably, more preferably 2.6-2.8% most preferably is 2.7%; Mn≤0.4%, more preferably 0.3-0.4%,, 0.33-0.38% more preferably,, 0.34-0.36% more preferably; P≤0.05% is preferably 0.001-0.05%, is preferably 0.001-0.04%, 0.001-0.03% more preferably, and 0.005-0.02% more preferably, more preferably 0.005-0.015% most preferably is 0.01%; S≤0.02% is preferably 0.01-0.02%, is preferably 0.015-0.02%; Mg0.035-0.05% is preferably 0.035-0.04%; Cu0.01-0.05%, more preferably 0.015-0.04%, more preferably 0.02-0.03%; Ni0.001-0.02% is preferably 0.005-0.015%, most preferably is 0.01%; Rare earth element is trace.
Perhaps described pulverizer knife rest also comprises the Ba element of trace.
Wherein, described rare earth element is preferably any one or a few the mixture that is selected from the lanthanide series metal, more preferably is selected from Ce, Sm, La, most preferably is Ce.
Pulverizer knife rest of the present invention, the knife rest main body comprises the transmission shaft open holes, is extended with at least one blade fixed block outside the knife rest main body, the blade fixed block is provided with fixing threaded hole, set screw and the lock blade for fixed blade.
Wherein, described pulverizer knife rest comprises at least 2 or 3, be preferably and comprise 3 blade fixed blocks, and 3 fixed blocks evenly distribute.
Second aspect of the present invention provides a kind of method of producing described pulverizer knife rest, comprising:
---first iron material, second iron material, carburelant are provided; First iron material comprises the pig iron and/or steel scrap and/or foundry returns, and second iron material comprises any one or a few the mixture in ferrosilicon, ferromanganese, sulphur iron, ferrophosphorus, ferrochrome, the copper; With the carburelant mixed melting, make molten iron after the assay was approved;
---make mould according to pulverizer knife rest predetermined shape;
Step comprises:
Step 1 is poured into molten iron in the mould, and adding nodulizing agent, rare earth element, Inoculant carry out the nodularization inoculation;
The present invention can also comprise molten iron analysis of chemical elements step, and method is: after molten iron temperature reaches tapping temperature, get testing plate, and the back spectrograph test analysis that polishes flat, and according to test result adjusting proportioning raw materials.
Wherein, in the gross weight of first iron material, second iron material, carburelant, each chemical element weight percent is: C3.5-4.0%, Si1.5-2.5%, S0.01-0.05%, P0.02-0.1%, Mn0.1-0.5%, Cr0.05-0.2%, Cu0.01-0.1%, Al0.01-0.05%, all the other are iron.
Wherein, first iron material, second iron material and carburelant weight ratio are preferably 500: (2-5): (8-15), and more preferably 500: (2-4): (8-12), more preferably 500: (2.5-3.5): (10-11).
Wherein, first iron material is preferably steel scrap and foundry returns mixture, and the part by weight of steel scrap and foundry returns is preferably 1: (0.1-5), and more preferably 1: (0.5-5), more preferably 1: (0.5-3), as 1: 1,1: 2 etc.
In the step 1, the temperature of described cast is preferably 1300 ° of C-1580 ° of C, more preferably 1300 ° of C-1550 ° of C, more preferably 1300 ° of C-1480 ° of C, more preferably 1300 ° of C-1450 ° of C, more preferably 1350 ° of C-1400 ° of C.
In the step 1, in all batching gross weights, the nodulizing agent addition is preferably 0.1-5%, 0.5-3% more preferably, and 0.5-2% more preferably, more preferably 0.8-1.5% most preferably is 1%.
Wherein, described nodulizing agent particle diameter is preferably 5-25mm.
Wherein, in the described nodulizing agent, be preferably elements such as containing Si, Ca, Al and Mg, according to the nodulizing agent total: Si content is preferably 40-50%, more preferably 41-47%, more preferably 43-46%, more preferably 44-46%; Ca content is preferably 1.5-3.5%, more preferably 1.8-3.0%, more preferably 2-2.8%, more preferably 2.2-2.5%; Al content is preferably 0.1-1%, more preferably 0.2-0.8%, more preferably 0.3-0.7%, more preferably 0.5-0.6%; Mg content is preferably 1-10%, more preferably 2-9%, more preferably 3-8%, more preferably 5-7%.
In the step 1, in all batching gross weights, the Inoculant addition is preferably 0.1-5%, 0.1-3% more preferably, and 0.2-2% more preferably, 0.3-1% more preferably, more preferably 0.3-0.7% most preferably is 0.5%.
In the step 1, in all batching gross weights, the rare earth element addition is preferably 0.01-0.05%, more preferably 0.01-0.03%, more preferably 0.01-0.02%, more preferably 0.015-0.02%.
Wherein, described rare earth element is preferably any one or a few the mixture that is selected from the lanthanide series metal, more preferably is selected from Ce, Sm, La, most preferably is Ce.
In the step 1, when adding nodulizing agent, rare earth element, Inoculant, can also add trace Ba element.
Wherein, the part that rare earth element, Ba can be used as nodulizing agent adds, and perhaps adds with nodulizing agent, Inoculant as independent component.In the step 2, the nodularization rate is controlled 〉=80%.
In the step 1, the nodularization time is preferably 〉=40s, more preferably 〉=and 50s, more preferably 50-100s, more preferably 50-80s, more preferably 50-60s.
Building in the process of step 1, also comprise the casting of Y type test rod, be used for the test of mechanical property.
Detect described in the step 3 and comprise that mechanical property detects, metallographic detects and physical imperfection detects.
In a kind of preferred embodiment aspect second of the present invention, the preparation method of described mould is as follows:
Step 1, mould raw material are mixed with water and are carried out mulling,
Wherein, after mulling, can also comprise the step of selecting sand, method is: use paddle type mill sampling machine, direct reading permmeter, hydraulic pressure strength machine, infrared baking instrument, sand sieving machine to measure CP value, ventilation property, ultimate compression strength, water content and the granularity of molding sand.
Wherein, the mould raw material is preferably the material that base material is silicon-dioxide and/or silicate, and as quartz sand and/or coal ash etc., described quartz sand can be white sand and/or yellow ground.
In second kind of preferred embodiment aspect second of the present invention, the antiquated sand that obtains after founding and/or the sand removal is reclaimed, with the mulling of mould raw material.
In the third preferred embodiment aspect second of the present invention, with the product of disqualified upon inspection in the step 4 part as foundry returns or foundry returns, with other iron material fusion or build after the fusion separately.
Aspect second of the present invention, in the method for described production high strength, high tenacity iron casting, between ball blast and tempering step, can also comprise the repair welding step, carry out repair welding with the defective product that will find behind the ball blast.
Aspect second of the present invention, in the method for described production high strength, high tenacity iron casting, between repair welding and tempering, can also comprise the polishing step, the product surface after the repair welding is polished.
The pulverizer knife rest that method provided by the present invention is produced have higher intensity and hardness, and elongation can have very excellent toughness up to more than 16%; Chemical composition content, metallographic structure all meet international standards; Simultaneously, compare with existing commercially available similar foundry goods, can prolong more than 50% work-ing life.
Description of drawings
Fig. 1 is for pulverizer cutter frame structure of the present invention and according to arriving crushiing chamber inner structure synoptic diagram;
Embodiment
Below with reference to Fig. 1, by specific embodiment the improved pulverizer knife rest of the present invention is described in detail and describes, so that better understand content of the present invention, but should be understood that following embodiment does not limit the scope of the invention.
Pulverizer knife rest 1 central position is transmission shaft open holes 11 in the present embodiment, the shape of transmission shaft open holes 11 depends on the rotating shaft shape, the present invention is also unrestricted, according to the rotating shaft shape, transmission shaft open holes 11 can be semicircle, Polygons etc., perhaps as shown in Figure 1, transmission shaft open holes 11 is made up of the flat key groove 12 of middle circular hole and circular hole side.
When pulverizing in the crushiing chamber 10 that 1 of machine knife is installed on pulverizer, rotating shaft is passed in the circular hole of transmission shaft open holes 11, and flat key inserts in the flat key groove 12 of circular hole side, in the rotating shaft rotation process, drives pulverizer knife rest 1 and rotates.
Pulverizer knife rest agent structure is extended with three blade fixed blocks 2 outward, and each blade fixed block 2 is provided with fixing threaded hole 23, set screw 21 and the lock blade 22 for fixing knife section 20.Knife section 20 usefulness lock blade 22 lock onto on the blade fixed block 2 of knife rest 1 by hexagon socket cap head screw 21.In crushiing chamber 10 ledger-plate 3 can also be installed, knife section 20 cooperatively interacts with ledger-plate 3, better plays crushing effect.
The chemical ingredients of the described pulverizer knife rest of present embodiment comprises: 3.5-3.6%; Si2.7%; Mn0.34-0.36%; P0.01%; S0.015-0.02%; Mg0.035-0.04%; Cu0.02-0.03%; Ni0.01%; Rare earth element ce and Ba element are trace.
The preparation method of the described pulverizer knife rest of present embodiment is as follows:
Step 1
According to C3.65-3.80%, Si1.8-2.0%, S0.02%, P0.04%, Mn0.4%, Cr0.1%, Cu0.05%, Al0.03%, all the other are the chemical ingredients proportioning of iron, provide steel scrap 250kg, foundry returns 250kg, carburelant 10kg, ferrosilicon (Fe-Si) 3kg.
After detection meets above-mentioned requirements, above-mentioned batching is dropped into 500kg control in the middle frequency furnace heating and melting automatically.
When molten iron temperature reaches tapping temperature (being 1350 ° of C in the present embodiment); product on duty are protected the core box of using special use and are got test piece; with test piece polish flat the back test at direct-reading spectrometer; carry out analysis of chemical elements; analytical results and material standard control; and comparing result sent to the furnace operation personnel, adjust batching with the conformance with standard requirement.
According to pulverizer cutter frame structure shown in Figure 1, the preparation mould.The method for preparing mould according to specified shape is well known by persons skilled in the art, therefore repeats no more.
Get white sand and coal ash etc., add water, quantitatively back mulling, measure CP value, ventilation property, ultimate compression strength, water content and the granularity of molding sand with paddle type mill sampling machine, direct reading permmeter, hydraulic pressure strength machine, infrared baking instrument, sand sieving machine, be used for moulding when satisfying production requirement, otherwise proportioning mulling again.
The screening back prepares mould at the streamline molding machine, comprises making external form and making loam core (namely making punch and die); Matched moulds.
The material that melts in the step 1 is poured in the mould, adds nodulizing agent, Inoculant, Ce element simultaneously, carry out the nodularization inoculation.
In the casting process, going out the soup temperature is 1550-1580 ° of C, and teeming temperature is 1300-1350 ° of C, and pouring procedure can adopt the mode of the cast of two-maing ladle.
Wherein, calculate according to all ingredients by weight, the nodulizing agent addition is 1%, and the Inoculant addition is that 0.5%, Ce addition is 0.02%.Ce can be the part adding as nodulizing agent, perhaps adds as independent component.
According to weight percent, the chemical ingredients of nodulizing agent comprises: Si44%, Ca2.5%, Al0.5%, Mg6% etc.
Nodularization rate 〉=80%, the nodularization time is 50-55s.
Inoculation back chemical ingredients requires: C3.45-3.65%, Si2.65-2.85%, S0.02%, P0.04%, Mn0.4%, Cr0.1%, Mg0.03.
After detection meets the requirements, the cooling demoulding, demould time is 1 hour.
Carry out founding and sand removal step, the antiquated sand that obtains in founding and the sand removal step can pass through recovery system, carries out again preparing mould after the mulling.
The rotary shot-blasting machine of suspension hook carries out ball blast, detects to occur carrying out repair welding, polishing after the defective.
Carry out temper afterwards.
Step 4
The product that obtains after the tempering is tested, and the gained castings examination the results are shown in Table 1-4 among the embodiment 1.
Table 1, chemical analysis
| Element | Technical requirements | Detected result | Conclusion |
| C(％) | 3．2-4．0 | 3．560 | Qualified |
| Si(％) | 2．1—3．1 | 2．700 | Qualified |
| Mn(％) | <0．400 | 0．349 | Qualified |
| P(％) | <0．050 | 0．010 | Qualified |
| S(％) | <0．020 | 0．018 | Qualified |
| Mg(％) | >0．035 | 0．038 | Qualified |
| Cu(％) | n／a | 0．024 | Qualified |
| Ni(％) | n／a | 0．01 | Qualified |
Table 2, mechanical property detects
Provided in the table 2 by universal testing machine and the Brinell tester detected result to the product mechanical property, by table 2 as can be seen, the iron casting that casting obtains in the present embodiment, has higher draw tensile strength, yield strength and hardness, emphasize all to meet with hardness " fusion control test " (Liquate control criterion standard, issue on April 4th, 2011); Unit elongation exceeds 61% up to 16.1% than " fusion control test ".
Table 3, graphite shape
| Graphite type | V+VI | III | II | IV | I | Perlite |
| Technical requirements | ≥60% | ≤10% | ≤3% | Other | 0.0% | ≤25% |
| Test result | 87% | 1% | 0% | 0% | 0% | 11% |
| Conclusion | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
Table 3 has provided the metallographic result who records by metaloscope, by table 3 as can be seen, in the iron casting for preparing in the present embodiment, graphite type is mainly V, VI, account for 87% altogether, the perlite ratio is 11%, illustrates that the metallographic structure of prepared iron casting meets " fusion control test ", and graphite shape and size are even.
Table 4, ultrasound examination
Adopt ultrasonic detection method (ultrasonic reflectoscope) that the iron casting in the present embodiment is carried out the physical imperfection inspection, can the results are shown in Table 4 by defectives such as loseless method testing product internal shrinkages, check result meets " fusion control test ".
More than specific embodiments of the invention are described in detail, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and substituting also all among category of the present invention.Therefore, not breaking away from impartial conversion and the modification of doing under the spirit and scope of the present invention, all should contain within the scope of the invention.
Claims (10)
1. an improved pulverizer knife rest is characterized in that, described pulverizer knife rest is iron casting, and according to weight percent, chemical ingredients comprises in the described knife rest: C3.2-4.0%; Si2.1-3.1%; Mn≤0.4%; P≤0.05%; S≤0.02%; Mg0.035-0.05%; Cu0.01-0.05%; Ni0.001-0.02%; Rare earth element is trace.
2. pulverizer knife rest according to claim 1 is characterized in that, also comprises the Ba element of trace.
3. pulverizer knife rest according to claim 1 and 2, it is characterized in that, the knife rest main body comprises the transmission shaft open holes, is extended with at least one blade fixed block outside the knife rest main body, and the blade fixed block is provided with fixing threaded hole, set screw and the lock blade for fixed blade.
4. a method of producing the described improved pulverizer knife rest of claim 1 is characterized in that, comprising:
---first iron material, second iron material, carburelant are provided; First iron material comprises the pig iron and/or steel scrap and/or foundry returns, and second iron material comprises any one or a few the mixture in ferrosilicon, ferromanganese, sulphur iron, ferrophosphorus, ferrochrome, the copper; With the carburelant mixed melting, make molten iron after the assay was approved;
---make mould according to pulverizer knife rest predetermined shape;
Step comprises:
Step 1 is poured into molten iron in the mould, and adding nodulizing agent, rare earth element, Inoculant carry out the nodularization inoculation;
Step 2 is carried out founding and sand removal after the cooling, carry out ball blast technology, then temper;
Step 3 obtains product after the assay was approved.
5. method according to claim 4 is characterized in that, also comprises molten iron analysis of chemical elements step, method is: after molten iron temperature reaches tapping temperature, get testing plate, the back spectrograph test analysis that polishes flat, and according to test result adjusting proportioning raw materials.
6. method according to claim 4 is characterized in that, building in the process of step 1, also comprises the casting of Y type test rod, is used for the test of mechanical property.
7. method according to claim 4 is characterized in that, in the step 1, in all batching gross weights, the nodulizing agent addition is preferably 0.1-5%; The Inoculant addition is preferably 0.1-5%; The rare earth element addition is preferably 0.01-0.05%.
8. method according to claim 4 is characterized in that, the preparation method of described mould is as follows:
Step 1, mould raw material are mixed with water and are carried out mulling,
Step 2 prepares external form and loam core respectively after the mulling,
Step 3, matched moulds.
9. method according to claim 8, it is characterized in that, wherein, after mulling, can also comprise the step of selecting sand, method is: use paddle type mill sampling machine, direct reading permmeter, hydraulic pressure strength machine, infrared baking instrument, sand sieving machine to measure CP value, ventilation property, ultimate compression strength, water content and the granularity of molding sand.
10. according to claim 4,8 or 9 described methods, it is characterized in that, the antiquated sand that obtains after founding and/or the sand removal is reclaimed, with the mulling of mould raw material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107737884A (en) * | 2017-11-10 | 2018-02-27 | 扬州市天奇机械有限公司 | A kind of casting method of bowl of head cardioid ring |
| CN109318396A (en) * | 2018-09-25 | 2019-02-12 | 巢湖市金辉自控设备有限公司 | A kind of recyclable device for tubing waste and old in frequency converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2464447Y (en) * | 2001-01-05 | 2001-12-12 | 罗忠裕 | Improved cutter for disintegrator |
| CN1653201A (en) * | 2002-05-14 | 2005-08-10 | 科技有限公司 | Method for production and forming of cast pieces of spheroidal graphite with improved mechanical properties |
| CN102127673A (en) * | 2010-01-12 | 2011-07-20 | 宝山钢铁股份有限公司 | High-strength spheroidal graphite cast iron for thick-walled casting die |
| CN102198415A (en) * | 2011-04-22 | 2011-09-28 | 上海电机学院 | Blade combination method of crusher and combined blade of same |
-
2013
- 2013-03-07 CN CN201310072260.5A patent/CN103194663B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2464447Y (en) * | 2001-01-05 | 2001-12-12 | 罗忠裕 | Improved cutter for disintegrator |
| CN1653201A (en) * | 2002-05-14 | 2005-08-10 | 科技有限公司 | Method for production and forming of cast pieces of spheroidal graphite with improved mechanical properties |
| CN102127673A (en) * | 2010-01-12 | 2011-07-20 | 宝山钢铁股份有限公司 | High-strength spheroidal graphite cast iron for thick-walled casting die |
| CN102198415A (en) * | 2011-04-22 | 2011-09-28 | 上海电机学院 | Blade combination method of crusher and combined blade of same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107737884A (en) * | 2017-11-10 | 2018-02-27 | 扬州市天奇机械有限公司 | A kind of casting method of bowl of head cardioid ring |
| CN107737884B (en) * | 2017-11-10 | 2019-05-03 | 扬州市天奇机械有限公司 | A kind of casting method of bowl of head cardioid ring |
| CN109318396A (en) * | 2018-09-25 | 2019-02-12 | 巢湖市金辉自控设备有限公司 | A kind of recyclable device for tubing waste and old in frequency converter |
| CN109318396B (en) * | 2018-09-25 | 2021-06-29 | 巢湖市金辉自控设备有限公司 | A recovery unit that is used for old and useless tubular product in converter |
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