CN109943767A - Elevator traction sheave casting technique - Google Patents
Elevator traction sheave casting technique Download PDFInfo
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- CN109943767A CN109943767A CN201910249815.6A CN201910249815A CN109943767A CN 109943767 A CN109943767 A CN 109943767A CN 201910249815 A CN201910249815 A CN 201910249815A CN 109943767 A CN109943767 A CN 109943767A
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- traction sheave
- elevator traction
- nowel
- casting
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Abstract
The invention discloses a kind of elevator traction sheave casting techniques, include the following steps, a, QT700-2 type spheroidal graphite cast-iron is smelted into molten iron, 1480-1520 DEG C of temperature, A product are obtained, b, are calculated by mass percentage, the inovulant of 0.9%-1.1% and 1% nodulizer are added in A product, obtain B product, c, casting die top box and casting die nowel are molded, obtain C product by the brushing antisurlphuizing coating on the type chamber of casting die nowel, d, B product are cast into C product, 1350-1370 DEG C of pouring temperature, D product are obtained, after e, D product are cooling, it opens, obtains elevator traction sheave finished product.The elevator traction sheave that the present invention is cast has the advantages that fraction defective is lower.
Description
Technical field
The invention belongs to elevator traction sheave casting fields.
Background technique
The material that elevator traction sheave uses is QT700-2 type spheroidal graphite cast-iron, and the hardness requirement of casting is 240-270HB and same
One casting each region hardness deviation is not greater than 15HB.It is calculated by mass percentage, 3.5%- is contained in elevator traction sheave
The Cu of the Mn of Si, 0.8-1.0% of 3.7% C, 2.4%-2.5% ,≤0.06% P ,≤0.02% S, 0.5-0.6%
With the Mg of 0.04%-0.06%.Spheroidal graphite cast-iron use medium-frequency induction furnace melting, added with 1% nodulizer and 0.8% it is pregnant
Agent is educated, tapping temperature is 1480-1520 DEG C, and pouring temperature is 1380-1420 DEG C.
As shown in Fig. 2, being found in the production process of actual casting, since nowel radiating rate is slow, under elevator traction sheave
Portion's overheat time is too long, leads to nodularization often occur on the contact surface (abbreviation nowel plane) of elevator traction sheave and casting die nowel
Decay forms a large amount of flake graphite in nowel plane, and lower hardness, often only 190HB, is not achieved elevator traction sheave
Casting requirement, and the contact surface (die joint of abbreviation top box plane and casting) of elevator traction sheave and casting die top box is hard
Degree is usually 250HB, and the difference of hardness between nowel plane and top box plane reaches 60HB, between nowel plane and top box plane
Hardness deviation is greater than 15HB, and the casting requirement of elevator traction sheave is also not achieved, can be considered as rejected product.It is practical raw through counting
The fraction defective of elevator traction sheave is 20% or so during production, and bad rate is higher.
Therefore, the elevator traction sheave of existing method casting haves the defects that bad rate is higher.
Summary of the invention
The object of the present invention is to provide a kind of elevator traction sheave casting techniques.The elevator traction sheave tool that the present invention is cast
Have the advantages that fraction defective is lower.
Technical solution of the present invention: elevator traction sheave casting technique includes the following steps,
A, QT700-2 type spheroidal graphite cast-iron is smelted into molten iron, 1480-1520 DEG C of temperature, obtains A product,
B, it is calculated by mass percentage, the inovulant of 0.9%-1.1% and 1% nodulizer is added in A product, obtains B product,
C, casting die top box and casting die nowel are molded, obtain C by the brushing antisurlphuizing coating on the type chamber of casting die nowel
Product,
D, B product are cast into C product, 1350-1370 DEG C of pouring temperature, obtain D product,
E, it after D product are cooling, open, obtains elevator traction sheave finished product.
In elevator traction sheave casting technique above-mentioned, the step b, which is calculated by mass percentage, to be added in A product
1% inovulant and 1% nodulizer, obtain B product.
It in the step a, is cast using medium-frequency induction furnace melting spheroidal graphite in elevator traction sheave casting technique above-mentioned
Iron.
In elevator traction sheave casting technique above-mentioned, in the step c, the casting die top box and casting die nowel
It is to be formed with grail by alkali phenolic resin gluing.
In elevator traction sheave casting technique above-mentioned, contain catalyst in the alkali phenolic resin.
Compared with prior art, the present invention improves the content of inovulant in molten iron, and elevator traction sheave nodularization has been delayed to decline
The speed moved back.By reducing pouring temperature, avoids nowel plane in an overheated state for a long time, further elevator has been delayed to drag
The speed of running wheel decaying spheroidisation.By the brushing antisurlphuizing coating on the type chamber of casting die nowel, box chamber under casting die is improved
The intensity and compactness on surface prevent the element sulphur contained in casting die nowel from entering nowel plane, can also delay
The speed of elevator traction sheave decaying spheroidisation.By that will be used to be bonded casting die top box and be used to be bonded the glue of casting die nowel
It is improved to alkali phenolic resin, so that not sulfur-bearing in glue, further reduces the quantity that element sulphur enters nowel plane, delay
The speed of elevator traction sheave decaying spheroidisation.Since the speed of elevator traction sheave decaying spheroidisation of the present invention is slow, nodularization effect is preferable, under
Flake graphite content in case plane is few, and hardness is higher, is stably maintained at 240HB or so, and the casting for reaching elevator traction sheave is wanted
It asks, and the hardness of top box plane is maintained at 250HB or so, the hardness deviation between nowel plane and top box plane is less than 15HB,
Also reach the casting requirement of elevator traction sheave.Through counting, the elevator traction sheave fraction defective that the present invention is cast is below 0.5%.Cause
This, the elevator traction sheave that the present invention is cast has the advantages that fraction defective is lower.
Detailed description of the invention
The structural schematic diagram of Fig. 1 elevator traction sheave.
Fig. 2 is the metallographic microscope for the elevator traction sheave nowel plane that the present invention is cast.
Fig. 3 is the metallographic microscope of the elevator traction sheave nowel plane of existing method casting.
The label in accompanying drawing is: 1- top box plane, 2- nowel plane.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples, but be not intended as to the present invention limit according to
According to.
Embodiment 1 (most preferred embodiment).Elevator traction sheave casting technique, includes the following steps,
A, QT700-2 type spheroidal graphite cast-iron is smelted by molten iron using medium-frequency induction furnace, molten iron is come out of the stove, tapping temperature 1500
DEG C, A product are obtained,
B, it is calculated by mass percentage, 1% inovulant and 1% nodulizer is added in A product, such as in the A product of 98kg
The inovulant of middle addition 1kg and the nodulizer of 1kg, obtain B product,
C, D350C type antisurlphuizing coating is brushed on the type chamber of casting die nowel, by casting die top box and casting die nowel
Molding, obtains C product,
D, B product are cast into C product, 1360 DEG C of pouring temperature, obtain D product,
E, it after D product are cooling, open, obtains elevator traction sheave finished product.
In the step c, the casting die top box and casting die nowel pass through alkali phenolic resin glue with grail
It is viscous to form.Alkali phenolic resin glue is added in grail, is pressed into the shape of casting die top box and casting die nowel after mixing evenly,
Casting die top box and casting die nowel can be obtained after drying.
Contain LS-G-01 type catalyst in the alkali phenolic resin, catalyst accelerates the solidification of alkali phenolic resin, improves
The manufacturing speed of casting die top box and casting die nowel.
Embodiment 2.Elevator traction sheave casting technique, includes the following steps,
A, QT700-2 type spheroidal graphite cast-iron is smelted by molten iron using medium-frequency induction furnace, molten iron is come out of the stove, tapping temperature 1480
DEG C, A product are obtained,
B, it is calculated by mass percentage, 0.9% inovulant and 1% nodulizer is added in A product, as in 98.1kg
The inovulant of 0.9kg and the nodulizer of 1kg are added in A product, obtain B product,
C, D350C type antisurlphuizing coating is brushed on the type chamber of casting die nowel, by casting die top box and casting die nowel
Molding, obtains C product,
D, B product are cast into C product, 1350 DEG C of pouring temperature, obtain D product,
E, it after D product are cooling, open, obtains elevator traction sheave finished product.
In the step c, the casting die top box and casting die nowel pass through alkali phenolic resin glue with grail
It is viscous to form.Alkali phenolic resin glue is added in grail, is pressed into the shape of casting die top box and casting die nowel after mixing evenly,
Casting die top box and casting die nowel can be obtained after drying.
Contain LS-G-01 type catalyst in the alkali phenolic resin, catalyst accelerates the solidification of alkali phenolic resin.
Embodiment 3.Elevator traction sheave casting technique, includes the following steps,
A, QT700-2 type spheroidal graphite cast-iron is smelted by molten iron using medium-frequency induction furnace, molten iron is come out of the stove, tapping temperature 1520
DEG C, A product are obtained,
B, it is calculated by mass percentage, 1.1% inovulant and 1% nodulizer is added in A product, as in 97.9kg
The inovulant of 1.1kg and the nodulizer of 1kg are added in A product, obtain B product,
C, D350C type antisurlphuizing coating is brushed on the type chamber of casting die nowel, by casting die top box and casting die nowel
Molding, obtains C product,
D, B product are cast into C product, 1370 DEG C of pouring temperature, obtain D product,
E, it after D product are cooling, open, obtains elevator traction sheave finished product.
In the step c, the casting die top box and casting die nowel pass through alkali phenolic resin glue with grail
It is viscous to form.Alkali phenolic resin glue is added in grail, is pressed into the shape of casting die top box and casting die nowel after mixing evenly,
Casting die top box and casting die nowel can be obtained after drying.
Contain LS-G-01 type catalyst in the alkali phenolic resin, catalyst accelerates the solidification of alkali phenolic resin.
Claims (5)
1. elevator traction sheave casting technique, it is characterised in that: include the following steps,
A, QT700-2 type spheroidal graphite cast-iron is smelted into molten iron, 1480-1520 DEG C of temperature, obtains A product,
B, it is calculated by mass percentage, the inovulant of 0.9%-1.1% and 1% nodulizer is added in A product, obtains B product,
C, casting die top box and casting die nowel are molded, obtain C product by the brushing antisurlphuizing coating on the type chamber of casting die nowel,
D, B product are cast into C product, 1350-1370 DEG C of pouring temperature, obtain D product,
E, it after D product are cooling, open, obtains elevator traction sheave finished product.
2. elevator traction sheave casting technique according to claim 1, it is characterised in that: the step b, by quality percentage
Than calculating, it is to add 1% inovulant and 1% nodulizer in A product, obtains B product.
3. elevator traction sheave casting technique according to claim 1, it is characterised in that: be in using in the step a
Frequency electric induction furnace smelting nodular cast iron.
4. elevator traction sheave casting technique according to claim 1, it is characterised in that: in the step c, the casting
Modeling top box and casting die nowel are formed with grail by alkali phenolic resin gluing.
5. elevator traction sheave casting technique according to claim 4, it is characterised in that: contain in the alkali phenolic resin and urge
Agent.
Priority Applications (1)
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| CN201910249815.6A CN109943767A (en) | 2019-03-29 | 2019-03-29 | Elevator traction sheave casting technique |
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| CN201910249815.6A CN109943767A (en) | 2019-03-29 | 2019-03-29 | Elevator traction sheave casting technique |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113909437A (en) * | 2021-09-30 | 2022-01-11 | 湖州鼎盛机械制造有限公司 | Casting process of tough ductile iron traction sheave |
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|---|---|---|---|---|
| CN101445853A (en) * | 2007-11-28 | 2009-06-03 | 上海华新合金有限公司 | Method for casting elevator as-cast ball iron towing pulley |
| US20100322813A1 (en) * | 2009-06-23 | 2010-12-23 | General Electric Company | SiMo DUCTILE IRON CASTINGS IN GAS TURBINE APPLICATIONS |
| CN102310187A (en) * | 2011-09-13 | 2012-01-11 | 上海华新合金有限公司 | Elevator traction sheave casting method |
| CN103231018A (en) * | 2013-04-24 | 2013-08-07 | 新绛县祥和机械有限公司 | Casting mold and casting method for tractor rotor part |
| CN103422009A (en) * | 2013-08-14 | 2013-12-04 | 辉县市汽车配件有限责任公司 | Nodular cast iron for rear axle housing of lorry and production method of nodular cast iron |
| CN106734873A (en) * | 2016-11-10 | 2017-05-31 | 安徽龙氏机械制造有限公司 | A kind of antisurlphuizing coating |
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2019
- 2019-03-29 CN CN201910249815.6A patent/CN109943767A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445853A (en) * | 2007-11-28 | 2009-06-03 | 上海华新合金有限公司 | Method for casting elevator as-cast ball iron towing pulley |
| US20100322813A1 (en) * | 2009-06-23 | 2010-12-23 | General Electric Company | SiMo DUCTILE IRON CASTINGS IN GAS TURBINE APPLICATIONS |
| CN102310187A (en) * | 2011-09-13 | 2012-01-11 | 上海华新合金有限公司 | Elevator traction sheave casting method |
| CN103231018A (en) * | 2013-04-24 | 2013-08-07 | 新绛县祥和机械有限公司 | Casting mold and casting method for tractor rotor part |
| CN103422009A (en) * | 2013-08-14 | 2013-12-04 | 辉县市汽车配件有限责任公司 | Nodular cast iron for rear axle housing of lorry and production method of nodular cast iron |
| CN106734873A (en) * | 2016-11-10 | 2017-05-31 | 安徽龙氏机械制造有限公司 | A kind of antisurlphuizing coating |
Non-Patent Citations (2)
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| 修坤等: "球墨铸铁表面球化衰退的研究", 《铸造》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113909437A (en) * | 2021-09-30 | 2022-01-11 | 湖州鼎盛机械制造有限公司 | Casting process of tough ductile iron traction sheave |
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Application publication date: 20190628 |
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