CN100441726C - Guide board for seamless steel pipe punching machine - Google Patents
Guide board for seamless steel pipe punching machine Download PDFInfo
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- CN100441726C CN100441726C CNB2007100182635A CN200710018263A CN100441726C CN 100441726 C CN100441726 C CN 100441726C CN B2007100182635 A CNB2007100182635 A CN B2007100182635A CN 200710018263 A CN200710018263 A CN 200710018263A CN 100441726 C CN100441726 C CN 100441726C
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Abstract
This invention discloses a new guide plate for seamless steel tube piercer. The comprised components and proportion by weight are as follows: C: 1.6-1.8%,Si: 0.6-0.8%,Mn: 0.6-0.8%,P: <=0.04%,S: <=0.04%,Cr: 26-28%,Ni: 4.5-5.5%,Nb: 0.1-3.0%, RE: 0.02-0.03%, the rest is Fe. It is characterized in that the problems of poor wear resistance at high temperature, short service life, easy broken and high price are solved in this invention, the working property and utilization effect are better than current conductive board, the service life is 3-5 times of that of current guide plate, and the fabricating cost is only 1/5-1/6 of that of imported conductive board.
Description
Technical field
The present invention relates to a kind of steel tube punching machine spare part, relate in particular to a kind of tapping machine guide plate of producing weldless steel tube.
Background technology
The tapping machine guide plate is the very big a kind of process spare part of consumption in the seamless steel tube production, and the height in guide plate quality and work-ing life directly has influence on the quality and the production efficiency of weldless steel tube.Its guide effect in bearing the seamless steel tube blank perforation procedure, also need participate in the high temperature deformation in the seamless steel tube blank perforation procedure, compare with the simple guide effect of guide plate in other steel production, Working environment is more abominable: bearing very big surging force, stress and frictional force under the high temperature about 1100 ℃.
The material of present employed guide plate of perforating machine is divided into two kinds substantially:
A kind of is the domestic rich chromium cast iron guide plate of perforating machine that uses traditionally, and its composition is following (1) or (2):
(1) its composition is: C:1.8～2.2%; Si:0.3～0.6%; Mn:0.3～0.6%; P, S :≤0.05%; Cr:25～30%; Ni:0～3.0%, all the other are Fe.
(2) its composition is: C:2.0～3.3%; Si :≤1.2%; Mn :≤2.0%; P≤1.0; S :≤0.06%; Cr:25～27%, all the other are Fe.
Deficiency and shortcoming that their exist be, shows wear resistance at elevated temperature in actual use and heat crack resistance is poor, and just need scrap replacing at 1～3 order of classes or grades at school (about 200～600) general work-ing life.Sometimes also can produce crackedly, directly influence is produced.
Another kind is the high nickel chromium triangle guide plate of perforating machine of import.Along with the fast development of China's steel pipe cause, a large amount of international most advanced level seamless steel tube production units have been introduced in recent years.These units are the heavy caliber unit especially, and roll speed is accelerated, and rolling load strengthens, and homemade traditional material rich chromium cast iron guide plate of perforating machine can not be satisfied the demand far away, so many manufacturing enterprises have all introduced the high nickel chromium triangle guide plate of perforating machine of part import at random.Its composition is: C:0.75～0.85%; Si :≤1.5%; Mn :≤0.5%; Cr:27.0～29.0%; Ni:49.0～51.0%; W:4.0～5.5%, all the other are Fe.
More than both at home and abroad the deficiency and the shortcoming that exist of guide plate of perforating machine be, will because of wearing and tearing scrap about 400～600 of perforation the work-ing life of homemade traditional material rich chromium cast iron guide plate of perforating machine, what have also can produce fracture and influence ordinary production; Though and import guide plate of perforating machine high-temperature wearable and heat crack resistance are better than present homemade traditional material rich chromium cast iron guide plate of perforating machine, as be about 2700～3000 the work-ing life of the φ 460mm pipe of boring a hole, but owing to used a large amount of noble metal-nickel (present about 400,000 yuan of internal price/t), therefore involve great expense.As a φ 460mm international most advanced level weldless steel tube unit of domestic introduction as using the domestic manufacturing guide plate of import material, substance is a 450kg/ spare, once use 2 simultaneously, consuming guide plate year is worth up to 3000～3,600 ten thousand yuans, if directly use imported product just more expensive, therefore become the extremely heavy burden of manufacturing enterprise.
Though more than the rich chromium cast iron guide plate of perforating machine of homemade material just lower but wear resistance at elevated temperature and heat crack resistance are poor with cost, can not satisfy for international most advanced level seamless steel tube production unit especially the demand of accessory is provided, better from the high nickel chromium triangle guide plate of perforating machine high-temperature wearable and the heat crack resistance of external import, but use cost is too high, and enterprise is difficult to bear.
Summary of the invention
The piercing mill of seamless steel tube guide plate of a kind of New Type Material that the objective of the invention is to solve the in use existing problem of above-mentioned piercing mill of seamless steel tube guide plate and develop, be used for substituting present employed guide plate of perforating machine, wear resisting property is poor in the hot operation process, work-ing life is low to solve guide plate of perforating machine, easy fracture and cost an arm and a leg, use problems such as producer is difficult to bear because of guide plate.
Creativeness of the present invention is by continuous research and test to piercing mill of seamless steel tube guide plate material composition and content, finds a kind of optimal components and content that improves piercing mill of seamless steel tube guide plate performance, and the cost of guide plate is reduced greatly.
Purpose of the present invention is finished by the following technical programs: the one-tenth that is applied to the guide plate on the tapping machine of rolling seamless steel pipe be grouped into and content range as follows in weight %: C:1.6～1.8%, Si:0.6～0.8%, Mn:0.6～0.8%, P :≤0.04%, S :≤0.04%, Cr:26～28%, Ni:4.5～5.5%, Nb:0.1～3.0%, RE:0.02～0.03%, all the other are Fe.Wherein: the following composition and the content range of guide plate are as follows: Si:0.65～0.75%, Mn:0.7～0.8%, Cr:27～28%, Ni:4.8～5.2%, Nb:0.15～2.5%.
The present invention compared with the prior art, its advantage is:
1. mechanical property of the present invention and practical effect are better than existing guide plate of perforating machine, are 3～5 times of existing domestic guide plate of perforating machine work-ing life, are higher than the work-ing life of external guide plate of perforating machine.
2. manufacture craft of the present invention with homemade, the import guide plate of perforating machine is identical, cost of manufacture only is 1/5～1/6 of an inlet guide.
3. the present invention compares with international most advanced level, has saved a large amount of noble metal-nickel (the nickel content of external guide plate is about 10 times of the present invention), can save energy.
Embodiment
The invention will be further described below in conjunction with embodiment.
The present invention is that the guide plate with a kind of New Type Material is applied on the tapping machine of rolling seamless steel pipe, thereby substitutes the rich chromium cast iron guide plate of perforating machine of domestic at present and external material.
Tapping machine of the present invention is as follows with the main component (by weight percentage) of guide plate: C:1.6～1.8%, Si:0.6～0.8%, Mn:0.6～0.8%, P :≤0.04%, S :≤0.04%, Cr:26～28%, Ni:4.5～5.5%, Nb:0.1～3.0%, RE:0.02～0.03%, all the other are Fe.Wherein: the following composition and the content range of guide plate are as follows: Si:0.65～0.75%, Mn:0.7～0.8%, Cr:27～28%, Ni:4.8～5.2%, Nb:0.15～2.5%.
The present invention has reduced the content of carbon through overtesting, has reduced the easily cracked shortcoming of guide plate, has added Nb and rare earth elements RE simultaneously, has improved the wear resistance at elevated temperature of material, has satisfied the demand of guide plate of perforating machine Working environment.
The application of Nb in steel and iron obtained very big development in recent years, obtained approving widely and using, and especially contains the Nb superalloy and obtained exploitation preferably.In cast iron, add Nb and can in matrix, separate out high rigidity (2000HV), high-melting-point, regular shape, granularity is less, even dispersion distributes hard phase-Nb (CN) particle, improve the toughness of material, form the basis of wear resisting property.In superalloy, the alternative Co of the adding of Nb can effectively control the solidifying segregation of alloy, improves its over-all properties, and plays the effect of saving Ni or Cr, can reach 50% Ni or 20% Cr at most.
The rare earth compound particle plays the nucleus effect in the casting process of setting, the crystallization of refinement tissue alleviates its dendrite degree effectively.Because the adding of rare earth element makes crystal grain refinement more, has improved plasticity and impelling strength; Improve the surface quality of foundry goods, improved yield rate, reduced the hot cracking tendency of casting.
Because comprehensive Nb and the rare earth elements RE of adding effectively raises over-all properties of the present invention, in use shown excellent high-temperature wear resisting property and heat crack resistance.
Tapping machine of the present invention guide plate work under bad environment: the effect of under the high temperature about 1100 ℃, bearing big surging force, stress and frictional force.Facts have proved that novel perforations machine guide plate result of use of the present invention is good, stable, surpass the guide plate of perforating machine of existing domestic and imported work-ing life, is 3～5 times of homemade guide plate work-ing life.Manufacturing cost is 1/5～1/6 of a domestic and international material guide plate of perforating machine.Save a large amount of noble metal nickel, reached energy-saving and cost-reducing effect.
In implementation process, the at first concrete working condition of being on active service according to purposes of the present invention, guide plate of perforating machine and the concrete proportioning of the selected novel perforations machine guide plate composition of technical requirements, use raw materials such as corresponding iron alloy, steel scrap, carry out conventional melting, obtain the molten steel that needs.Take conventional casting then, obtain the blank that needs.Carry out mechanical workout again, produce the guide plate of perforating machine that needs.User mode of the present invention is an as cast condition.
Embodiment 1
Make φ 460 tapping machinees and overlap totally 2 with guide plate one.The composition of selected material is by weight percentage as following table:
| C | Si | Mn | P | S | Cr | Ni | Nb | RE | Fe |
| 1.80 | 0.80 | 0.80 | 0.025 | 0.029 | 28 | 5.5 | 3.0 | 0.03 | All the other |
Require selected proportioning raw materials according to the composition in the table, carry out conventional melting in medium-frequency induction furnace, carry out conventional sand mold casting, the blank that acquisition needs carries out conventional mechanical workout then, produces φ 460 tapping machine guide plates.
The φ 460 tapping machine guide plates of embodiment 1, finished weight is a 452kg/ spare.The hardness of present embodiment is HRC37～41, introduce at home on international most advanced level φ 460 tapping machinees and experimentize, under the high temperature about 1100 ℃ and bear under the effect of big surging force, stress and frictional force and use, meet and exceed the level of the external material tapping machine of prior art work-ing life with guide plate: the external material tapping machine of prior art with guide plate work-ing life for boring a hole 2700～3000 steel pipes, the present embodiment tapping machine with guide plate work-ing life for boring a hole 3300 steel pipes, and its steady quality, do not rupture, guaranteed to produce and normally carried out.The existing domestic and international material tapping machine that has overcome fully only be 1/5th of an external import tapping machine usefulness guide plate with the technical disadvantages of guide plate, its cost.
Embodiment 2
Make φ 245 tapping machinees and overlap totally 2 with guide plate one.The composition of selected material is by weight percentage as following table:
| C | Si | Mn | P | S | Cr | Ni | Nb | RE | Fe |
| 1.71 | 0.62 | 0.80 | 0.03 | 0.03 | 27 | 5.0 | 1.7 | 0.03 | All the other |
Require selected proportioning raw materials according to above composition, carry out conventional melting in medium-frequency induction furnace, carry out conventional sand mold casting, the blank that acquisition needs carries out conventional mechanical workout then, produces φ 245 tapping machine guide plates.
The φ 245 tapping machine guide plates of embodiment 2, finished weight is a 260kg/ spare.The hardness of present embodiment is HRC37～39, introduce at home on international most advanced level φ 245 tapping machinees and experimentize, under the high temperature about 1100 ℃ and bear under the effect of big surging force, stress and frictional force and use, meet and exceed the level of the external material tapping machine of prior art with guide plate work-ing life: external material tapping machine is 2800～3100 steel pipes of can boring a hole with guide plate work-ing life, the present embodiment tapping machine with guide plate work-ing life for boring a hole 3400 steel pipes, and its steady quality, do not rupture, guaranteed to produce and normally carried out.The existing external material tapping machine that has overcome fully only be 1/5th of an external import tapping machine usefulness guide plate with the technical disadvantages of guide plate, its cost.
Embodiment 3
Make φ 219 tapping machinees and overlap totally 2 with guide plate one.The composition of selected material is by weight percentage as following table:
| C | Si | Mn | P | S | Cr | Ni | Nb | RE | Fe |
| 1.60 | 0.60 | 0.80 | 0.03 | 0.03 | 26.0 | 5.5 | 0.10 | 0.02 | All the other |
Divide according to last telogenesis to require selected proportioning raw materials, in medium-frequency induction furnace, carry out conventional melting, carry out conventional sand mold casting, obtain the blank that needs, carry out conventional mechanical workout then, produce φ 219 tapping machine guide plates.
The φ 219 tapping machine guide plates of embodiment 3, finished weight is a 43.5kg/ spare.The hardness of present embodiment is HRC35～37, introduce at home on international most advanced level φ 219 tapping machinees and experimentize, under the high temperature about 1100 ℃ and bear under the effect of big surging force, stress and frictional force and use, be more than 3 times of guide plate of the homemade rich chromium cast iron tapping machine of prior art work-ing life, homemade rich chromium cast iron tapping machine with guide plate work-ing life for boring a hole 500～600 steel pipes, the present embodiment tapping machine with guide plate work-ing life for boring a hole 2000 steel pipes, and its steady quality, do not rupture, guaranteed to produce and normally carried out.The existing homemade rich chromium cast iron tapping machine that has overcome fully is with the technical disadvantages of guide plate, and its cost is suitable with guide plate with existing homemade rich chromium cast iron tapping machine, only be the sixth of external import tapping machine usefulness guide plate.
Embodiment 4
Make φ 89 tapping machinees and overlap totally 2 with guide plate one.The composition of selected material is by weight percentage as following table:
| C | Si | Mn | P | S | Cr | Ni | Nb | RE | Fe |
| 1.70 | 0.73 | 0.68 | 0.03 | 0.03 | 27 | 4.9 | 1.6 | 0.03 | All the other |
Require selected proportioning raw materials according to the composition in the table, in medium-frequency induction furnace, carry out conventional melting, carry out conventional sand mold casting, obtain the blank that needs.Carry out conventional mechanical workout then, produce φ 89 tapping machine guide plates.
The φ 89 tapping machine guide plates of embodiment 4, finished weight is a 11kg/ spare.The hardness of present embodiment is HRC36～38, introduce at home on international most advanced level φ 89 tapping machinees and experimentize, under the high temperature about 1100 ℃ and bear under the effect of big surging force, stress and frictional force and use, be the homemade rich chromium cast iron tapping machine of prior art with more than 5 times of guide plate work-ing life: homemade rich chromium cast iron tapping machine with guide plate work-ing life for boring a hole 400～500 steel pipes, the present embodiment tapping machine with guide plate work-ing life for boring a hole 2800 steel pipes, and its steady quality, do not rupture, guaranteed to produce and normally carried out.Existing homemade rich chromium cast iron (1) the tapping machine guide plate technical disadvantages that has overcome fully, its cost is suitable with guide plate with existing homemade rich chromium cast iron tapping machine, only be the sixth of external import tapping machine usefulness guide plate.
Claims (2)
1, a kind of guide plate for seamless steel pipe punching machine, the one-tenth that it is characterized in that guide plate be grouped into and content range as follows in weight %: C:1.6～1.8%, Si:0.6～0.8%, Mn:0.6～0.8%, P :≤0.04%, S :≤0.04%, Cr:26～28%, Ni:4.5～5.5%, Nb:0.1～3.0%, RE:0.02～0.03%, all the other are Fe.
2, guide plate for seamless steel pipe punching machine according to claim 1, the composition and the content range that it is characterized in that guide plate are as follows in weight %: Si:0.65～0.75%, Mn:0.7～0.8%, Cr:27～28%, Ni:4.8～5.2%, Nb:0.15～2.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100182635A CN100441726C (en) | 2007-07-13 | 2007-07-13 | Guide board for seamless steel pipe punching machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100182635A CN100441726C (en) | 2007-07-13 | 2007-07-13 | Guide board for seamless steel pipe punching machine |
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| Publication Number | Publication Date |
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| CN101086055A CN101086055A (en) | 2007-12-12 |
| CN100441726C true CN100441726C (en) | 2008-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100182635A Active CN100441726C (en) | 2007-07-13 | 2007-07-13 | Guide board for seamless steel pipe punching machine |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828128A (en) * | 2011-06-15 | 2012-12-19 | 蔡宏 | Novel guide plate for seamless steel pipe perforator |
| CN111922732A (en) * | 2020-06-29 | 2020-11-13 | 河北偶园钛模具有限公司 | Manufacturing method of composite guide plate for seamless tube puncher |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1180759A (en) * | 1997-09-18 | 1998-05-06 | 冶金工业部北京冶金设备研究院 | Assembly guide board for multiple high chromium caststeel mill and manufacture method thereof |
| JP2003041350A (en) * | 2001-08-01 | 2003-02-13 | Nisshin Steel Co Ltd | Martensitic stainless steel sheet for flapper valve and manufacturing method therefor |
-
2007
- 2007-07-13 CN CNB2007100182635A patent/CN100441726C/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1180759A (en) * | 1997-09-18 | 1998-05-06 | 冶金工业部北京冶金设备研究院 | Assembly guide board for multiple high chromium caststeel mill and manufacture method thereof |
| JP2003041350A (en) * | 2001-08-01 | 2003-02-13 | Nisshin Steel Co Ltd | Martensitic stainless steel sheet for flapper valve and manufacturing method therefor |
Non-Patent Citations (2)
| Title |
|---|
| 导板用新型铸造合金的研制与应用. 刘佩刚，刘日忠.铸造，第1期. 1984 |
| 导板用新型铸造合金的研制与应用. 刘佩刚，刘日忠.铸造，第1期. 1984 * |
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| CN101086055A (en) | 2007-12-12 |
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