CN101015836A - Casting high ferrochrome or casting high chromium steel roll for welding steel pipe - Google Patents
Casting high ferrochrome or casting high chromium steel roll for welding steel pipe Download PDFInfo
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- CN101015836A CN101015836A CNA200610104942XA CN200610104942A CN101015836A CN 101015836 A CN101015836 A CN 101015836A CN A200610104942X A CNA200610104942X A CN A200610104942XA CN 200610104942 A CN200610104942 A CN 200610104942A CN 101015836 A CN101015836 A CN 101015836A
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- roll
- casting
- welded still
- still pipe
- pipe
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 31
- 239000010959 steel Substances 0.000 title claims abstract description 31
- 238000005266 casting Methods 0.000 title claims description 50
- 229910000604 Ferrochrome Inorganic materials 0.000 title claims description 32
- 229910001220 stainless steel Inorganic materials 0.000 title claims description 21
- 238000003466 welding Methods 0.000 title abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 17
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 12
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 11
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 11
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 239000011651 chromium Substances 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 19
- 238000005096 rolling process Methods 0.000 claims description 17
- 238000003801 milling Methods 0.000 claims description 7
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 10
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 229910000669 Chrome steel Inorganic materials 0.000 abstract 1
- 238000005299 abrasion Methods 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 28
- 239000000956 alloy Substances 0.000 description 28
- 229910001315 Tool steel Inorganic materials 0.000 description 27
- 238000005242 forging Methods 0.000 description 23
- 238000004519 manufacturing process Methods 0.000 description 20
- 238000005516 engineering process Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 9
- 230000008676 import Effects 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 229910001018 Cast iron Inorganic materials 0.000 description 4
- 229910001208 Crucible steel Inorganic materials 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000007514 turning Methods 0.000 description 2
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- -1 rare earth compound Chemical class 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/56—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.7% by weight of carbon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
Abstract
The invention provides a cast high chrome iron or cast high chrome steel roller used to roll weld steel tube and on straight-slim welding steel tube roller, or the like, wherein the cast high chrome iron roller comprises C in 1.8-2.8%, Si <=1.0%, Mn <=1.0%, P<=0.05%, S<=0.05%, Cr in 12-22%, Ni in 0.5-3.0%, Mo in 0. 0%, Ti in 0-0.3%, V in 0-1.0%, Cu in 0-1.0%, RE in 0.01-0.5%, and the left is Fe. The inventive roller has uniform organism, high abrasion resistance and flexibility, while its service life is 2-5 times of general product and material utilization can reach 70% or 80%, with low cost.
Description
Technical field
The present invention relates to a kind of casting roll, relate in particular to high ferrochrome of casting or casting high chromium steel roller that a kind of rolling welded still pipe is used.
Background technology
Roll is the critical piece of consumption maximum during welded still pipe is produced, and the height in roll quality and life-span directly affects the quality and the production efficiency of welded still pipe.Roll directly contacts rolled piece and finishes the whole operation of rolling.In the effect of bearing big compression, also to bear and roll and sliding friction, the influence that also will be subjected to chilling and shock heating that has is so serious wear needs frequently to change.
The welded still pipe roll of represent at present international most advanced level be Germany produce the trade mark be X165CrMoV12 or X155Cr MoV121, Italy produce the trade mark be X165CrMoV12KU, the U.S. produce the trade mark be D2 and Japan to produce the trade mark be the alloy tool steel forging roller of SKD11, SKD61, domestic as Baosteel, go up introductions such as marine oily Tian Bao, Shandong Shengli Oil Field Hua Rui the use of international most advanced level welded still pipe production line be exactly German and Japanese product.
The material that at present domestic advanced welded still pipe roll adopts is to approach the Cr of the above-mentioned external trade mark
12The MoV cold work die steel, use this steel to the material degree of purity have relatively high expectations, forging and heat treatment difficulty be all very big, domestic have only minority producer can produce the less forging Cr of diameter
12The MoV roll, and yield rate is very low, price is also more expensive, and diameter is greater than the forging Cr of Ф 500
12The MoV roll is domestic still not to have manufacturer production at present, needs dependence on import, external manufacturer also seldom, large diameter wrought alloy tool steel welded still pipe mainly is the adret essence machine company of gondola EURO company and Japan with the manufacturer of roll.
Domestic welded still pipe roll, the basic at present GCr that adopts
15, 3Cr
2W
8V, Cr
12(YB/T128) and 9Cr
2Wrought alloy tool steel such as Mo are produced.Because all multifactor influences such as the performance of material, production technology level, make that the performance on performance such as wear-resisting of these rolls is relatively poor, especially can not adapt to the working condition and the specification requirement of present international most advanced level production line, comparing with the international most advanced level product still has certain distance.
The above is used for the various rolls of welded still pipe, and currently used both at home and abroad all is wrought alloy tool steel technology, has following tangible deficiency and shortcoming in forging roller production.
1. above-mentioned alloy tool steel forging roller production technology is complicated, technology difficulty is higher and long flow path: needs pass through steel-making, refining, vacuum outgas, (also add vacuum decarburization abroad, require the nonmetal inclusion total amount to be lower than 0.10%) casting, forging, roughing, heat treatment usually, fine finishining just can be delivered for use again.
2. because the alloy tool steel welded still pipe is wide in variety with the roll specification, the same specification kind is too little in batches, and basic same specification kind only need be made 1～2, because of the high difficult die forging that forms of processing forging die cost, most open die forgings that adopt.Therefore forging stock and actual needs size disparity are bigger, make that follow-up amount of machining is big, and stock utilization is low, and generally 50～60%, individual other only has 30%.
3. alloy tool steel welded still pipe major diameter roll except that top 1. described reason, also because volume is thick, is difficult to improve the internal organizational structure of steel to reach good performance indications by forging.
4. the alloy tool steel welded still pipe must be through Overheating Treatment, to obtain needed surperficial high rigidity working lining with roll.But the hardness of alloy tool forged steel changes its metallographic structure by quenching and obtains.Limited because of the degree of depth of quenching, so the high rigidity working lining that forms is thinner, and institutional framework is inhomogeneous, from outward appearance to inner essence causes hardness gradient.For guaranteeing the roll precision, need carry out repeatedly reconditioning at work, when wearing and tearing surpassed effective quench hardened case, hardness just reduced greatly, and even can't continue to use, thereby had influenced the service life of roll greatly.
In recent ten years, research to rich chromium cast iron or cast steel with high chromium new material has both at home and abroad had remarkable progress, the example and the report that also all have both at home and abroad the high-chromium cast roll in strip is produced, to use, but also do not seen to have the high ferrochrome of casting or casting high chromium steel roller are applied to report or the example of welded still pipe in producing.
Summary of the invention
The objective of the invention is to solve above-mentioned welded still pipe roll existing problem in processing and manufacturing and use, thereby the high ferrochrome of a kind of casting is provided or has cast high chromium steel roller, be used for substituting present alloy tool steel forging roller, the technological process when the processing and manufacturing of alloy tool steel forging roller is long, difficulty is big, production efficiency is low, stock utilization is low to solve, wearability is low, shortcomings such as serviceability and result of use are poor, and service life is low.
Purpose of the present invention is finished by the following technical programs: welded still pipe of the present invention is applied on the milling train of rolling welded still pipe with high ferrochrome of casting or casting high chromium steel roller; Said welded still pipe can be the welded still pipe of different shapes such as straight seam welded steel pipe, spiral welded steel pipe, rectangle welded still pipe.
The composition that the present invention is applied to the high ferrochrome roll of casting on the rolling rolling mill for welded steel pipe is by weight percentage: C:1.8～2.8%, and Si :≤1.0%, Mn :≤1.0%, P :≤0.05%, S :≤0.05%, Cr:12～22%, Ni:0.5～3.0%, Mo:0.8～3.0%, Ti:0～0.3%, V:0～1.0%, Cu:0～1.0%, RE:0.01～0.5%, all the other are Fe.
The composition that the present invention is applied to the casting high chromium steel roller on the rolling rolling mill for welded steel pipe is by weight percentage: C:0.7～1.2%, and Si :≤1.0%, Mn :≤1.0%, P :≤0.05%, S :≤0.05%, Cr:8～12%, Ni:0.5～2.0%, Mo:0.8～3.0%, Ti:0～0.3%, V:0～1.0%, W:0～0.8%, RE:0.01～0.5%, all the other are Fe.
The present invention is by the melting of high ferrochrome or high chrome routine, and high ferrochrome of casting or high chromium steel roller are made in casting, roughing, heat treatment, fine finishining (having saved complicated refining and Forging Technology), are applied on the milling train of rolling welded still pipe.
The present invention adopts casting when making welded still pipe with high ferrochrome or high chromium steel roller, compare and to significantly reduce processing capacity more near the polishing roll size with common employing forging forming, improve the utilization rate of material, generally can reach 70%, reach as high as 80%.
The present invention compared with the prior art, its advantage is: 1. adopt cast shaping process, than adopting forging forming more near the polishing roll size, significantly reduce processing capacity, improve stock utilization; 2. the present invention adopts high ferrochrome or high chrome to be cast as the welded still pipe roll, especially large diameter roll, its metallographic structure is more reasonable than wrought alloy tool steel roll, its intensity, hardness and performance such as wear-resisting are better than wrought alloy tool steel roll, so its result of use and all be better than wrought alloy tool steel roll service life; 3. adopt cast shaping process when making welded still pipe with high ferrochrome of casting or high chromium steel roller, its flow process is shorter with wrought alloy tool steel roll than Forging Technology manufacturing welded still pipe, technology is simple, cost is low.
Description of drawings
Fig. 1 is welding straight-line joint steel pipe side squeeze roll
Fig. 2 uses squeeze roll for the welding straight-line joint steel pipe
Fig. 3 is welding rectangular steel pipe bottom roll
The specific embodiment
The present invention will be described in more detail below in conjunction with drawings and Examples.
The present invention is the wrought alloy tool steel roll that casting high ferrochrome or high chromium steel roller at first is applied to replace on the rolling mill for welded steel pipe unlike material, can be used on the rolling mill for welded steel pipe of different shapes such as straight seam welded steel pipe milling train, spiral welded steel pipe milling train, rectangle rolling mill for welded steel pipe.The present invention is according to the selected high ferrochrome of concrete working condition, specification requirement at position, roll place or the concrete proportioning of high chrome composition, use raw materials such as corresponding ferroalloy, steel scrap to carry out conventional melting, the molten steel that acquisition needs, take conventional casting, the blank that acquisition needs, carry out processing such as conventional heat treatment and conventional car, mill then, produce welded still pipe with high ferrochrome of casting or high chromium steel roller.
The high ferrochrome of casting of the present invention can be following composition (by weight percentage): C:1.8～2.8%, and Si :≤1.0%, Mn :≤1.0%, P :≤0.05%, S :≤0.05%, Cr:12～22%, Ni:0.5～3.0%, Mo:0.8～3.0%, Ti:0～0.3%, V:0～1.0%, Cu:0～1.0%, RE:0.01～0.5%, all the other are Fe.
Casting high chrome of the present invention can be following composition (by weight percentage): C:0.7～1.2%, and Si :≤1.0%, Mn :≤1.0%, P :≤0.05%, S :≤0.05%, Cr:8～12%, Ni:0.5～2.0%, Mo:0.8～3.0%, Ti:0～0.3%, V:0～1.0%, W:0～0.8%, RE:0.01～0.5%, all the other are Fe.
Welded still pipe of the present invention is with having added rare earth elements RE in high ferrochrome of casting or the casting high chromium steel roller.Rare earth enters that molten steel forms sulfide, oxide and other is mingled with compound, its fusing point is higher than the solidification of molten steel temperature, therefore, the rare earth compound particle plays the nucleus effect in the casting process of setting, thereby the crystalline structure of refinement casting roll effectively, alleviated the dendrite degree, particularly remarkable to rich chromium cast iron or cast steel roll.Because the adding of rare earth element makes the crystal grain refinement more of rich chromium cast iron or cast steel roll, has improved the plasticity and the impact flexibility of rich chromium cast iron or cast steel roll; Improve the surface quality of foundry goods, improved yield rate, reduced the hot cracking tendency of roll.
Embodiment 1
With reference to shown in Figure 1, present embodiment is applied to purposes on the milling train of rolling welded still pipe according to high ferrochrome or the casting high chromium steel roller will cast of the present invention, a cover totally 2 Ф 530.0 welded still pipes side squeeze roll have been made with casting production process, its composition is selected following high ferrochrome composition (by weight percentage): C:1.8% for use, Si :≤1.0%, Mn :≤1.0%, P :≤0.05%, S :≤0.05%, Cr:13%, Ni:1.0%, Mo:1.2%, Ti:0.2%, V:0.2%, Cu:0.5%, RE:0.05%, all the other are Fe.Hardness after the present embodiment heat treatment is HRC58～59.8.
Require selected raw material proportioning according to composition, carry out melting, casting in medium-frequency induction furnace, the blank that acquisition needs is heat-treated and processing such as car, mill then, produces welded still pipe side squeeze roll.
The welded still pipe of present embodiment 1 side squeeze roll, blank weight are 1657kg/ spare, and finished weight is a 1292.5kg/ spare, and stock utilization is 78%.Because the pass of present embodiment is very dark, be that external form diameter gap is bigger, the two ends maximum gauge is φ 856mm, middle pass recess minimum diameter is φ 589.63mm, highly be 575mm, endoporus is φ 330mm, if adopt the open die forging mode to obtain blank, stock utilization is the highest can only to be reached about 50%.Hardness is HRC59.5～62 after the heat treatment of present embodiment, introduce at home on international most advanced level φ 610 rolling mill for welded steel pipe and test, met and exceeded the level of import wrought alloy tool steel welded still pipe roll its service life, can substitute import fully, homemade high level high life welded still pipe roll is provided.
Embodiment 2
The shape of enforcement 2 as shown in Figure 2.According to purposes of the present invention with casting production process made one the cover totally 2 Ф 273.1 welded still pipes use squeeze roll, its composition is selected following high chrome composition (by weight percentage): C:0.9%, Si :≤1.0% for use, Mn :≤1.0%, P :≤0.05%, S :≤0.05%, Cr:10%, Ni:0.5%, Mo:0.8%, Ti:0.3%, V:0.5%, W:0.3%, RE:0.015%, all the other are Fe.
Require selected raw material proportioning according to composition, carry out melting, casting in medium-frequency induction furnace, the blank that acquisition needs is heat-treated and processing such as car, mill then, produces welded still pipe and uses squeeze roll.
Embodiment 2 uses squeeze roll for welded still pipe, and blank weight is 91.6kg/ spare, and finished weight is a 65.5kg/ spare, and stock utilization is 71.5%.Present embodiment is if adopt the open die forging mode to obtain blank, and stock utilization is the highest can only to be reached about 55%.Hardness is HRC55.5～57 after the heat treatment of present embodiment, tests on international most advanced level φ 325 rolling mill for welded steel pipe of Yin Jining at home, has met and exceeded the level of Japanese wrought alloy tool steel roll its service life.Through 4 turning reparations, each turning amount is about 2mm, and hardness still kept HRC55～57 after external diameter reduced 16mm.
Embodiment 3
The shape of enforcement 3 as shown in Figure 3.Made a cover totally 2 500 * 500mm welding rectangular steel pipe bottom rolls according to purposes of the present invention with casting production process, its composition is selected following high ferrochrome composition (by weight percentage): C:2.8%, Si :≤1.0% for use, Mn :≤1.0%, P :≤0.05%, S :≤0.05%, Cr:22%, Ni:2.5%, Mo:2.0%, Ti:0.1%, V:0.3%, Cu:0.5%, RE:0.1%, all the other are Fe.
Require selected raw material proportioning according to composition, carry out melting, casting in medium-frequency induction furnace, the blank that acquisition needs carries out processing such as car, mill then, produces welding rectangular steel pipe bottom roll.
Embodiment 3 is 500 * 500mm welding rectangular steel pipe bottom roll, and blank weight is 3513kg/ spare, and finished weight is a 2780kg/ spare, and stock utilization is 79.1%.This roll maximum outside diameter Ф 1350mm, minimum outer diameter Ф 660mm, highly be Ф 350mm for 530mm, endoporus, present embodiment is if adopt the open die forging mode to obtain blank, and stock utilization is the highest can only to be reached about 55%.The hardness of cast form of present embodiment is HRC55～58, test on Zui Da welding side's square pipe-mill at home, reach 3 times of homemade wrought alloy tool steel roll its disposable service life, and all can reach more than 3 times of homemade wrought alloy tool steel roll the service life after each the reparation.
Embodiment 4
Present embodiment is applied to purposes on the milling train of rolling welded still pipe according to high ferrochrome or the casting high chromium steel roller will cast of the present invention, made a cover totally 1 Ф 219.1 welded still pipe squeeze roll down with casting production process, its composition is selected following high ferrochrome composition (by weight percentage): C:2.3% for use, Si :≤1.0%, Mn :≤1.0%, P :≤0.5%, S :≤0.5%, Cr:18%, Ni:0.8%, Mo:0.8%, Ti:0.2%, V:0.4%, Cu:0.3%, RE:0.02%, all the other are Fe.
Require selected raw material proportioning according to composition, carry out melting, casting in medium-frequency induction furnace, the blank that acquisition needs is heat-treated and processing such as car, mill then, produces welded still pipe side squeeze roll.
The welded still pipe of present embodiment 1 side squeeze roll, blank weight are 122kg/ spare, and finished weight is a 91.5kg/ spare, and stock utilization is 75%.Because the shape of present embodiment is complicated, middle projection maximum gauge is φ 401.52mm, thick 106mm, and both sides high spot diameter is φ 250mm, the thick 47mm of single face, and endoporus is φ 160mm, if adopt the open die forging mode to obtain blank, stock utilization is the highest can only to be reached about 49%.Hardness is HRC58.8～61 after the heat treatment of present embodiment, introduce at home on international most advanced level φ 250 rolling mill for welded steel pipe and test, met and exceeded the level of import wrought alloy tool steel welded still pipe roll its service life, can substitute import fully, homemade high level high life welded still pipe roll is provided.
The present invention is to cast high ferrochrome or high chrome as the material of welded still pipe with roll.Because its good alloying material proportioning, make high ferrochrome or high chrome welded still pipe and can manage consistent metallographic structure by the acquisition table with roll, thereby obtain intensity the same outside and inside, hardness and anti-wear performance, overcome aforementioned alloy tool steel forging roller because quench-hardened case thickness is limited, from outward appearance to inner essence tissue odds spares, forms hardness gradient, be difficult to satisfy the actual deficiency of using needs, its production technology is simple, operation is less, and is with short production cycle, and production cost is also lower.
With the welded still pipe roll that designed high ferrochrome of the present invention or high chrome casting technique are made, its intensity reaches 6
b〉=500MPa; Hardness reaches HRC55～65; Can reach 2～3 times of homemade wrought alloy tool steel welded still pipe roll its disposable service life, and all can reach more than 2～3 times of homemade wrought alloy tool steel roll the service life after each the reparation, can reach and surpass the service life of international most advanced level wrought alloy tool steel welded still pipe rolls such as Germany, Italy, Japan: reconditioning repeatedly still can keep previous level and can not reduce to scrapping its working face hardness.
Welded still pipe of the present invention is with the high ferrochrome of casting or cast high chromium steel roller owing to adopt high ferrochrome of casting or high chrome technology, and the roll product material tissue of manufacturing is about even, and wearability and toughness improve a lot, and be multiplied service life.Saved raw material, production cost reduces greatly.The present invention some welded still pipe manufacturers at home tests, met and exceeded the level of import wrought alloy tool steel welded still pipe roll its service life, can reach 2～3 times of homemade wrought alloy tool steel welded still pipe roll its disposable service life, and all can reach more than 2～3 times of homemade wrought alloy tool steel roll the service life after each the reparation.
Claims (4)
1, a kind of welded still pipe is characterized in that with high ferrochrome of casting or casting high chromium steel roller this roll is applied on the milling train of rolling welded still pipe.
2, welded still pipe according to claim 1 is characterized in that with high ferrochrome of casting or casting high chromium steel roller said welded still pipe is the welded still pipe of different shapes such as straight seam welded steel pipe, spiral welded steel pipe, rectangle welded still pipe.
3, the described welded still pipe of a kind of claim 1 high ferrochrome of casting or casting high chromium steel roller,, it is characterized in that the composition of casting high ferrochrome roll is by weight percentage: C:1.8～2.8%, Si :≤1.0%, Mn :≤1.0%, P :≤0.05%, S :≤0.05%, Cr:12～22%, Ni:0.5～3.0%, Mo:0.8～3.0%, Ti:0～0.3%, V:0～1.0%, Cu:0～1.0%, RE:0.01～0.5%, all the other are Fe.
4, the described welded still pipe of a kind of claim 1 high ferrochrome of casting or casting high chromium steel roller,, it is characterized in that the composition of casting high chromium steel roller is by weight percentage: C:0.7～1.2%, Si :≤1.0%, Mn :≤1.0%, P :≤0.05%, S :≤0.05%, Cr:8～12%, Ni:0.5～2.0%, Mo:0.8～3.0%, Ti:0～0.3%, V:0～1.0%, W:0～0.8%, RE:0.01～0.5%, all the other are Fe.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610104942XA CN100423858C (en) | 2006-11-22 | 2006-11-22 | Casting high ferrochrome or casting high chromium steel roll for welding steel pipe |
| PCT/CN2007/003299 WO2008061452A1 (en) | 2006-11-22 | 2007-11-21 | Roller for welding pipe mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610104942XA CN100423858C (en) | 2006-11-22 | 2006-11-22 | Casting high ferrochrome or casting high chromium steel roll for welding steel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101015836A true CN101015836A (en) | 2007-08-15 |
| CN100423858C CN100423858C (en) | 2008-10-08 |
Family
ID=38725151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200610104942XA Active CN100423858C (en) | 2006-11-22 | 2006-11-22 | Casting high ferrochrome or casting high chromium steel roll for welding steel pipe |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100423858C (en) |
| WO (1) | WO2008061452A1 (en) |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101805869A (en) * | 2010-04-16 | 2010-08-18 | 北京工业大学 | Boron-contained high-chromium high-speed steel roller material and heat treatment method thereof |
| CN101818311A (en) * | 2010-05-13 | 2010-09-01 | 石家庄工业泵厂有限公司 | High-tenacity and wear-resistance metal material |
| CN102251185A (en) * | 2011-06-22 | 2011-11-23 | 山东省四方技术开发有限公司 | Preparation method of high-chromium roller for steel tube reducing mill or sizing mill and high-chromium roller prepared thereby |
| CN102296240A (en) * | 2011-08-12 | 2011-12-28 | 山东省四方技术开发有限公司 | Steel pipe and cold-formed steel high-chromium roller and preparation method thereof |
| CN102330016A (en) * | 2011-09-16 | 2012-01-25 | 昆明市宜良化工设备铸造厂 | Hypoeutectic high-chromium white cast iron and preparation method thereof |
| CN102443745A (en) * | 2010-10-09 | 2012-05-09 | 王振民 | High-chromium alloy steel anti-abrasion liner |
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| CN100423858C (en) | 2008-10-08 |
| WO2008061452A1 (en) | 2008-05-29 |
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