CN1080329A - The tilting roller cover and the manufacture method thereof of half steel material - Google Patents
The tilting roller cover and the manufacture method thereof of half steel material Download PDFInfo
- Publication number
- CN1080329A CN1080329A CN 92104496 CN92104496A CN1080329A CN 1080329 A CN1080329 A CN 1080329A CN 92104496 CN92104496 CN 92104496 CN 92104496 A CN92104496 A CN 92104496A CN 1080329 A CN1080329 A CN 1080329A
- Authority
- CN
- China
- Prior art keywords
- roller cover
- tilting roller
- casting
- tilting
- manufacture method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Heat Treatment Of Articles (AREA)
- Continuous Casting (AREA)
Abstract
The invention belongs to the improvement of tilting roller cover material and manufacture method thereof, this roller shell is applied on the hot continuous mill tilting gear frame.The invention provides a kind of half steel material tilting roller cover of casting and forging.The range of choice of its chemical ingredients has been taken into account the wear resistance and the physical strength of tilting roller cover.Molten steel is all plastic with general well-established law and rotary casting after rotten the processing.Finally reached the over-all properties that wear resistance is good and physical strength is high through thermal treatment then.Significantly reduced in the use and changed groove roll change number of times, improved operating rate of rolling mill.
Description
The invention belongs to the tilting roller cover on the hot continuous mill.Between the rougher of hot strip mill unit horizontal frames of some type, steel billet earlier by the tilting roller cover finish reverse after, it is rolling to enter down a time again.
Different with the roll (or roller shell) that common rolled steel is used.The tilting roller cover is to work inclement condition under the state that does not carry out water-cooled.Though there is not draught, it is subjected to the acting in conjunction of thermal stresses, surging force and torsion that steel billet brings.If no good comprehensive mechanical performance, or because of the slotted eye serious wear, or scrap because of taking place to rupture.
Existing tilting roller cover adopts forged steel material such as 35CrMo, after modifier treatment, though tensile strength, impelling strength etc. are higher, wears no resistance, and can not use synchronously with the roll pass of stocking, has caused and has changed groove roll change increased frequency, and prolong total stop time.
The wear resistance of the roll (or roller shell) that the solution common rolled steel is used, the common methods of obdurability and comprehensive mechanical performance is the bimetal composite casting method, be the skin wear-resistant material of roll (or roller shell), the material of core (or internal layer) with excellent mechanical properties.As Japanese JP57-94466 is bimetal composite centrifugal casting roller shell.Other has JP61-229459 is the compound static(al) of bimetal (well-established law) casting roller shell.This method is to be welded into round with a special steel plate, after the ectonexine space is separated, and cast respectively.But an outstanding feature of tilting roller cover is its pass will reach 2/3 place of going deep into whole wall thickness of roll shell.So adopt composite centrifugal casting or compound static(al) casting difficulty bigger, product performance are difficult for guaranteeing.These two kinds of methods all exist complex process, manufacturing is loaded down with trivial details, scrap rate is high, cost is high shortcoming.
The tilting roller cover and the manufacture method thereof that the purpose of this invention is to provide a kind of single material.
For realizing purpose of the present invention, it adopts the half steel material, further improves performance through rotten processing and thermal treatment process.General rotary casting or well-established law casting are all plastic.
The total composition range of tilting roller cover of described half steel material is:
C：1.3-1.7%;Si：0.3-0.7%;Mn：0.7-1.1%;Ni：0.8-1.2%;
Cr：0.8-1.2%;Mo：0.2-0.6%;P≤0.10%;S≤0.05%;
Yu Tie and impurity.
Above composition range has wear resistance and intensity etc. and requires and design to take into account the tilting roller cover.Each element role is summarized as follows:
C content is to the performance impact maximum of material.For hypereutectoid steel, the quantity of the high more carbide of carbon amount is just many more, and wear resistance is good more, but intensity also descends thereupon.The comprehensive operation of rolling is to the performance requriements of tilting roller cover, and selected C:1.3-1.7% is the most suitable.
Si mainly plays the effect of deoxidation in steel, along with the raising of silicon amount, unit elongation is on a declining curve, so be decided to be Si:0.3-0.7%.
Mn plays the solution strengthening effect in steel, can improve mechanical property and improve hardening depth.Add the fashionable purpose that also can reach deoxidation and weaken the deleterious effect of sulphur in right amount.But therefore the too high heat-resistant cracking that then can reduce steel of add-on is decided to be Mn:0.7-1.1%.
Ni is an important element that improves the foundry goods over-all properties, can improve the hardening capacity and the hot hardness of steel, and play the effect of solution strengthening and refinement matrix.Being decided to be Ni:0.8-1.2% suits.
Cr can form the carbide of chromium in steel, improve carbide hardness and wear resistance, also can improve hardening capacity.For the plasticity that prevents steel descends and the generation of temper brittleness, selected Cr:0.8-1.2%.
Mo plays the solution strengthening effect in steel, can increase wear resistance, and reduces temper brittleness, improves the hot strength and the hardness of steel.According to the proportioning of the economical rationality of Ni, Cr, Mo alloy, and we produce the experience of roll for many years, and the molybdenum amount is decided to be 0.2-0.6%.
Use above composition, it is the carbide of some amount that distributing on the pearlite matrix that the as cast condition tilting roller of producing overlaps its metallographic structure, this carbide mainly exists with netted and needle-like form, performance there is bigger detrimentally affect, in order to improve the form of carbide, on the manufacturing process, we have also adopted rotten processing and heat-treating methods to control.
Rotten processing is an important method improving performance, and it can promote the carbide network agglomerateization, and makes the wedge angle rust.Again can be in the heat treatment process, the transformation of carbide morphology plays a positive role, and makes carbide drop to inferior limit to the cutting action of matrix.We use rare earth as alterant, and add-on is between 0.12-0.20%.The residual Re amount of handling in the molten steel of back answers 〉=0.05%, and like this, the tilting roller cover after heat treatment can improve impelling strength about 10%.
The final tissue of the tilting roller cover of described half steel material after heat treatment obtains.Thermal treatment process is also very big to tilting roller cover Effect on Performance.
Heat treated purpose is except eliminating dendritic segregation, uniform formation, and crystal grain thinning and improving outside the matrix form also can obtain the carbide of small and dispersed.
The carbide morphology of as cast condition half steel tissue mainly contains: the carbide network of separating out along crystal boundary, and by acicular carbide and the massive carbide of crystal boundary to the intracrystalline growth.In the thermal treatment temperature-rise period, when reaching 830 ℃, temperature at first begins to disappear with acicular carbide, and when continuing to rise to 910 ℃ along with temperature then, carbide network begins to disappear, and massive carbide still exists up to 1100 ℃, just reduces to some extent.This explanation can be eliminated and change netted and acicular carbide by appropriate heat treatment, and the size of massive carbide then depends primarily on casting condition.
The sample of same composition is measured its hot hardness after 830 ℃ to 960 ℃ differing temps normalizings and 600 ℃ of tempering, the result is: through the sample hot hardness height of pyroprocessing.
For guaranteeing that the tilting roller cover has good toughness, need obtain the matrix of granular pearlite.Through test, the Spheroidizing Annealing temperature is advisable with 780-840 ℃.
In view of the above, the thermal treatment process of formulation is (1) 1000-1050 ℃ of diffusion annealing; (2) 780-840 ℃ of Spheroidizing Annealing; (3) 900-930 ℃ of normalizing and (4) 600-630 ℃ of tempering.After the thermal treatment, the hardness of roller shell, intensity, impelling strength etc. all satisfy the service requirements of the operation of rolling to the tilting roller cover like this.
Accompanying drawing 1 is a heat treatment cycle curve.
Below be external diameter φ 360mm, aperture φ 110mm, the rotary casting embodiment of the tilting roller cover of long 790mm and well-established law casting embodiment.
After ferrous materials and alloy were prepared burden by the composition requirement, melting in electric arc furnace or induction furnace within described scope, when being warming up to 1530-1550 ℃, added the fine aluminium deoxidation of molten steel weight 0.5 ‰ with Composition Control, prepares then to come out of the stove.Earlier rare earth alterative is placed in the ladle, adding weight is 0.15% of molten steel weight, promptly finishes rotten the processing after pouring molten steel.Liquid steel temperature is controlled at 1440-1460 ℃ during cast, and centrifuge speed is 850 rev/mins, turns round 20-30 minute, solidifies the back fully and shuts down.Together hang out together with frock, place the depanning of unpacking after 12 hours.Can heat-treat thereafter.
In well-established law when casting,, adopting wall thickness is the cast iron metallic mould of 150mm, interior spraying zircon flour coating, again with the common steel tube that is slightly less than tilting roller cover aperture, in fill up the dry sand coring, the laggard kiln drying of mould assembling.The proportioning of raw material metal, melting, temperature control, rotten processing and thermal treatment process all are same as rotary casting.So just finished the foundry work of tilting roller cover blank.
Because the present invention is the tilting roller cover of casting half steel material, be greatly improved than the tilting roller cover wear resistance of former 35CrMo forged steel material.Other mechanical property has also well satisfied service requirements.Through surveying its hardness HS(D) 40-45, tensile strength 860-1000MPa, ballistic work 12-15J/cm
2
The tilting roller cover of described half steel material obviously improves than former 35CrMo forged steel material tilting roller cover wear resistance through on probation, turns over the steel angle and stablizes.Owing to significantly reduced and changed groove roll change number of times, thereby improved operating rate of rolling mill, can obtain good economic benefit.
Claims (3)
1, a kind of tilting roller cover that is used for hot continuous mill, molten steel adopt rotten the processing, thermal treatment again behind rotary casting or the well-established law casting, and the composition range that it is characterized in that it is C:1.3-1.7%; Si:0.3-0.7%; Mn:0.7-1.1%; Ni:0.8-1.2%; Cr:0.8-1.2%; Mo:0.2-0.6%; P≤0.10%; S≤0.05%; Yu Tie and impurity.
2, according to the manufacture method of the described tilting roller of claim 1 cover, the rare earth alterative that it is characterized in that in the molten steel of described composition, pouring 0.12-0.20% processings of go bad, the residual Re amount of handling in the back molten steel answers 〉=0.05%.
3, according to the manufacture method of the described tilting roller cover of claim 1, it is characterized in that the thermal treatment process that adopts is 1000-1050 ℃ of diffusion annealing, 780-840 ℃ of Spheroidizing Annealing, 900-930 ℃ of normalizing and 600-630 ℃ of tempering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92104496 CN1080329A (en) | 1992-06-13 | 1992-06-13 | The tilting roller cover and the manufacture method thereof of half steel material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92104496 CN1080329A (en) | 1992-06-13 | 1992-06-13 | The tilting roller cover and the manufacture method thereof of half steel material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1080329A true CN1080329A (en) | 1994-01-05 |
Family
ID=4940838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92104496 Pending CN1080329A (en) | 1992-06-13 | 1992-06-13 | The tilting roller cover and the manufacture method thereof of half steel material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1080329A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392139C (en) * | 2005-05-11 | 2008-06-04 | 江苏共昌轧辊有限公司 | Alloy half steel composite roll collar and preparation process thereof |
| CN102061891A (en) * | 2009-11-18 | 2011-05-18 | 安东石油技术（集团）有限公司 | Oil pumping polish rod |
| CN101798660B (en) * | 2010-01-11 | 2011-07-20 | 段岳君 | Method for refining, metamorphosing and casting cold roll steel by casting instead of forging |
| CN102628146A (en) * | 2012-04-05 | 2012-08-08 | 常熟市轧辊厂限公司 | High-nickel-chromium-alloy semi-steel roll and manufacturing method thereof |
| CN105369139A (en) * | 2015-10-22 | 2016-03-02 | 中钢集团邢台机械轧辊有限公司 | Break-down roller made of special alloy semi-steel material and manufacturing method of break-down roller |
| CN106011444A (en) * | 2016-08-03 | 2016-10-12 | 成都三强轧辊股份有限公司 | H-section steel roll collar heat treatment technology |
| CN108486461A (en) * | 2018-03-20 | 2018-09-04 | 湖州中杭轧辊有限公司 | A kind of evanohm half steel shaped steel polishing roll |
| CN109530629A (en) * | 2018-12-17 | 2019-03-29 | 邢台德龙机械轧辊有限公司 | Roller covers casting device and preparation method thereof and roller set |
-
1992
- 1992-06-13 CN CN 92104496 patent/CN1080329A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392139C (en) * | 2005-05-11 | 2008-06-04 | 江苏共昌轧辊有限公司 | Alloy half steel composite roll collar and preparation process thereof |
| CN102061891A (en) * | 2009-11-18 | 2011-05-18 | 安东石油技术（集团）有限公司 | Oil pumping polish rod |
| CN101798660B (en) * | 2010-01-11 | 2011-07-20 | 段岳君 | Method for refining, metamorphosing and casting cold roll steel by casting instead of forging |
| CN102628146A (en) * | 2012-04-05 | 2012-08-08 | 常熟市轧辊厂限公司 | High-nickel-chromium-alloy semi-steel roll and manufacturing method thereof |
| CN105369139A (en) * | 2015-10-22 | 2016-03-02 | 中钢集团邢台机械轧辊有限公司 | Break-down roller made of special alloy semi-steel material and manufacturing method of break-down roller |
| CN106011444A (en) * | 2016-08-03 | 2016-10-12 | 成都三强轧辊股份有限公司 | H-section steel roll collar heat treatment technology |
| CN108486461A (en) * | 2018-03-20 | 2018-09-04 | 湖州中杭轧辊有限公司 | A kind of evanohm half steel shaped steel polishing roll |
| CN109530629A (en) * | 2018-12-17 | 2019-03-29 | 邢台德龙机械轧辊有限公司 | Roller covers casting device and preparation method thereof and roller set |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105750529B (en) | A kind of high tungsten high abrasion compound high speed steel roll and preparation method thereof | |
| CN100485075C (en) | High-carbon high-vanadium high-speed steel composite roller and heat treatment method thereof | |
| CN107475641B (en) | High-speed steel roll and preparation method thereof | |
| CN109252104A (en) | High-speed steel and production method thereof | |
| CN102766824B (en) | Abrasion-resistant high-speed-steel roller ring and preparation method thereof | |
| CN104388812A (en) | High-speed steel composite roller for rods/wires and preparation method of high-speed steel composite roller | |
| CN107574359A (en) | A kind of low-alloy composite roll and its manufacture method | |
| CN114351032A (en) | Preparation method of high-material vertical roll | |
| CN1064566C (en) | Centrifugal casting method for producing composite high-speed steel rollers | |
| JP2002507663A (en) | Steel material and its manufacturing method | |
| CN1080329A (en) | The tilting roller cover and the manufacture method thereof of half steel material | |
| CN106756561A (en) | The method that Thin Specs RE52Mn steel is produced based on ESP bar strip continuous casting and rolling flow paths | |
| CN115491571B (en) | Preparation method of hot-work die steel and hot-work die steel | |
| CN1068149A (en) | Vanadium titanium unlimited chilled ductile iron roll and castmethod | |
| CN110387506A (en) | High abrasion centrifugal compound high-speed steel roll | |
| EP2660344A1 (en) | Centrifugally cast roll for last finishing stands in hot strip mills | |
| JPH02285047A (en) | Roll for hot rolling | |
| CN106756578B (en) | SAE8660 hot-rolled sheet and production process | |
| US4411713A (en) | Shell for a composite roll | |
| CN109972024A (en) | A kind of preparation method of pinion steel Steel Bar and preparation method thereof and rod iron | |
| CN111270122A (en) | Manufacturing method of niobium microalloyed cold roll and niobium microalloyed cold roll | |
| CN111074160B (en) | High-red hard die steel and preparation method thereof | |
| JPH02147148A (en) | Production of case hardening steel product | |
| JPH0229725B2 (en) | KOJINSEINETSUKANTANZOYOHICHOSHITSUBOKONOSEIZOHOHO | |
| JPS61199035A (en) | Manufacture of composite roll having tough neck part |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |