CN1054163C - Cast-steel roller and its heat treatment method - Google Patents
Cast-steel roller and its heat treatment method Download PDFInfo
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- CN1054163C CN1054163C CN96101927A CN96101927A CN1054163C CN 1054163 C CN1054163 C CN 1054163C CN 96101927 A CN96101927 A CN 96101927A CN 96101927 A CN96101927 A CN 96101927A CN 1054163 C CN1054163 C CN 1054163C
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- cast
- roller
- roll body
- roll
- rare earth
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Abstract
The present invention discloses a cast-steel roller and a heat treatment method thereof, which is characterized in that the roller body has the structure of a cast-steel thin wall, annular ribs are cast on the inner surface of the roller body, a rare earth multi-element copenetration surface treatment technology is adopted, and a homemade quenching medium is adopted for quenching. The scheme has the advantages of energy saving, production efficiency enhancement, penetration-layer tissue improvement, service life extension, and super hardness and wear-resistance; the roller body wall of the roller is half thinner than that of an ordinary cast-iron roller in the same specification, and in addition, the roller has the advantages of no crack, no soft spot, small deformation, remarkable improvement of mechanical property, can be used as a substitute for an LS47-82 oil roller according with the technical condition promulgated by the existing ministry of commerce, and can be used in the field of light chemical industry, such as milling, sugar manufacturing, glue refining, etc.
Description
The invention belongs to industrial roll, particularly a kind of oil material roller also can be used for light industry industry fields such as powder process, sugaring, refining glue.
The existing industrial roll particularly roll of light industry industry departments application such as oil plant, powder process, sugaring, refining glue mostly is cast iron thick cylinder formula structure, and its case hardening process generally adopts hardening treatment in casting mold cavity.Be mechanical propertys such as the intensity that guarantees roll, rigidity, existing similar roll weight is all very big, high material consumption; Simultaneously owing to adopt thick-walled structure, roll body is heated and is difficult to control evenly when its thermal treatment, and be easy to generate peeling, fall the limit, draw defective such as ditch, and the cost height.The present invention proposes a kind of new cast steel roll structure and heat treating method thereof, still finds no the report with the same or analogous technical scheme of the present invention.
The objective of the invention is to disclose structure and the heat treating method thereof that a kind of new rare earth multicomponent oozes cast steel roll altogether,, improve the performance of similar roll to overcome the defective of prior art.
The present invention program is achieved in that and structurally adopts cast steel thin-walled or roll body and semiaxis structure, and is cast with annular rib at the roll body internal surface.It is that rare earth multicomponent oozes altogether that its heat treating method changes surface cementation, makes the surface obtain the co-penetration layer more excellent than carburized surface performance, then at descent of temperature, (contain calcium chloride 8～14% at homemade quenchant again, sodium-chlor 2～10%, all the other are water) the middle quenching, after handling, low-temperaturetempering forms.
Advantage of the present invention is: owing to adopted circular thin-wall rib roll body and the removable semiaxis syndeton that replaces cast iron with cast steel, make structure more reasonable, improved the utilization ratio of roll, cooperate to adopt rare earth multicomponent to ooze the surface heat treatment technology altogether, realized the direct quenching of medium carbon steel foundry goods and be out of shape very little purpose, saved the energy, improved production efficiency, crystal grain thinning has improved diffusion layer organization, has improved work-ing life; Rare earth multicomponent oozes altogether than traditional carburizing treatment and makes the roll body surface energy obtain more excellent co-penetration layer, because rare earth has extremely strong chemically reactive, three processes of decomposition, absorption, diffusion of thermo-chemical treatment have been quickened, under the effect of rare earth catalytic cementation and microalloying, infiltration rate improves 20%, original 930 ℃ carburizing temperature is reduced to 880 ℃ oozes altogether; Owing to adopted homemade quenchant, after being quenched, the cast steel roll body do not crack, and no soft spots is out of shape very for a short time, non-scale, falls limit, La Gou, and has replaced used import oil quenching medium, makes cost decline; Replace cast iron that the mechanical propertys such as intensity, toughness, impact of roll body are significantly improved with cast steel.The roll superhard wear that adopts the present invention to produce, roll body working-surface hardness is HRC58-64, significantly improve than the HRC48-55 that stipulates in People's Republic of China (PRC) Ministry of Commerce's technical qualification LS47-82 oil material roller promulgated by the ministries or commissions of the Central Government technical qualification, and the roll body wall thickness can be reduced to about half of prior art, has saved a large amount of starting material.
Figure one is a structural representation of the present invention.
Embodiments of the invention: roll body 4 is the cast steel thin cylinder, and the surface is cast with annular rib 5 within it, and semiaxis 1 hot charging is connected with roll body 4 by bolt 3 on permanent sleeve 2 then.Its heat treating method is roll body 4 to be put into contain the trace rare-earth element rich carbon medium pit furnace of (every liter of methyl alcohol contains 10-20 gram rare earth element), carries out rare earth multicomponent and ooze altogether under gas phase condition, and oozing temperature altogether is 880 ℃; Directly at descent of temperature to 800 ℃, roll body 4 is put into contained calcium chloride 8-14% then after oozing altogether, carry out quench treatment in the water quenching medium of sodium-chlor 2-10%; Roll body being put into during at 200-250 ℃ 200 ℃ tempering stove when temperature carries out low-temperaturetempering and handles.
Claims (2)
1, a kind of cast steel roll, form by semiaxis (1), permanent sleeve (2), bolt (3) and roll body (4), it is characterized in that semiaxis (1) hot charging on permanent sleeve (2), permanent sleeve (2) is removable with roll body (4) and is connected, and the internal surface of roll body (4) is cast with annular rib (5).
2, the heat treating method of cast steel roll as claimed in claim 1, it is characterized in that roll body placed and contain the trace rare-earth element rich carbon medium pit furnace of (every liter of methyl alcohol contains 10～20 gram rare earth elements), carry out rare earth multicomponent and ooze altogether under gas phase condition, oozing temperature altogether is 880 ℃; Ooze the back altogether at descent of temperature to 800 ℃; In the water quenching medium that contains calcium chloride 8～14%, sodium-chlor 2～10%, carry out quench treatment; Carrying out low-temperaturetempering in 200 ℃ tempering stove handles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96101927A CN1054163C (en) | 1996-01-17 | 1996-01-17 | Cast-steel roller and its heat treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96101927A CN1054163C (en) | 1996-01-17 | 1996-01-17 | Cast-steel roller and its heat treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1136594A CN1136594A (en) | 1996-11-27 |
| CN1054163C true CN1054163C (en) | 2000-07-05 |
Family
ID=5117334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96101927A Expired - Fee Related CN1054163C (en) | 1996-01-17 | 1996-01-17 | Cast-steel roller and its heat treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1054163C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357460C (en) * | 2006-03-14 | 2007-12-26 | 钢铁研究总院 | Cooling technology for obtaining multi-element tissue martensite steel |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103898439A (en) * | 2014-04-01 | 2014-07-02 | 安庆市吉安汽车零件锻轧有限公司 | Rare earth and carbon co-penetration process of gear |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030380A (en) * | 1987-03-27 | 1989-01-18 | 美商贝洛特公司 | The roller of self loading controlled deflection |
| CN1113958A (en) * | 1994-05-30 | 1995-12-27 | 武钢汉口轧钢厂冶金设备修造公司 | Thermal treating technology for cold bending roller |
-
1996
- 1996-01-17 CN CN96101927A patent/CN1054163C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030380A (en) * | 1987-03-27 | 1989-01-18 | 美商贝洛特公司 | The roller of self loading controlled deflection |
| CN1113958A (en) * | 1994-05-30 | 1995-12-27 | 武钢汉口轧钢厂冶金设备修造公司 | Thermal treating technology for cold bending roller |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357460C (en) * | 2006-03-14 | 2007-12-26 | 钢铁研究总院 | Cooling technology for obtaining multi-element tissue martensite steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1136594A (en) | 1996-11-27 |
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