CN1106466A - Prodn. technique of compound wear resistant double-rolle roller rim - Google Patents
Prodn. technique of compound wear resistant double-rolle roller rim Download PDFInfo
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- CN1106466A CN1106466A CN 94100942 CN94100942A CN1106466A CN 1106466 A CN1106466 A CN 1106466A CN 94100942 CN94100942 CN 94100942 CN 94100942 A CN94100942 A CN 94100942A CN 1106466 A CN1106466 A CN 1106466A
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- cast iron
- chromium manganese
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- molybdenum cast
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Abstract
The technology for producing antiwear compound double-roll roller ring includes compound casting and heat treatment and features that the external layer of the compound roller ring contains C (1.9-2.6%), Cr (11.0-14.5%), Mn (0.6-2,8%), Mo (1.0-1.9%), Cu (0.9-1.5%), V (0.08-0.20%) and Re (0.1-0.20%). Its advantages are good antiwear nature, long service life and low cost.
Description
The invention provides a kind of composition of composite roll circle, recombining process and thermal treatment process.
With correlation technique of the present invention the high chrome molybdenum cast iron of U.S. Climax molybdenum company is arranged, its composition is high chrome molybdenum type 15-2-1, C:2.8～3.5%, Cr:14～16, Mo:1.9～2.2%, Cu:0.5～1.2%, Mn:0.5～0.9%, USSR (Union of Soviet Socialist Republics) antifriction cast iron composition is C:2.7～3.1%, Cr:12～15%, Mo:0.5～0.6%, Mn:3.3～3.9%.
The domestic product that uses has two kinds: a kind ofly be the hollow steel rolls circle, material is middle carbon cast steel, and a kind of is middle manganese magnesium iron roller circle, its common drawback is to wear no resistance, and the life-span is low, and the former only is about 40 days entire life, the latter's wear limit also only 50 days just must roll surface of turning, and be 8 months entire life.
The object of the present invention is to provide a kind of high-wearing feature, in high work-ing life, be suitable for the low compound wear resistant double-rolle roller rim production technique of native Zhi Zhuan And cost inferior.
Of the present invention constituting:
1. the outer chromium manganese of composite roll circle molybdenum cast iron composition reduces carbon content and chromium content, adds vanadium and rare earth metal refinement ledeburite eutectic structure, improves iron liquid flowability.Be the hardening capacity of control chromium manganese molybdenum cast iron, with manganese and molybdenum comprehensive action, if manganese is at lower limit, and then molybdenum should be in the upper limit, and vice versa.Chromium manganese molybdenum cast iron composition: 1.9～2.6%C, 11.0～14.5%Cr, 0.6～2.8%Mn, 1.0～1.9%Mo, 0.9～1.5%Cu, 0.08～0.20%V, 0.10～0.20%RE(add-on).
2. composite casting technology:
With electric arc furnace or medium-frequency induction furnace melting chromium manganese molybdenum cast iron and spheroidal graphite cast iron.Chromium manganese molybdenum cast iron pours into opening of whizzer and waters temperature 1450～1550 ℃ of scopes.100～300 ℃ of mould temperature are opened and are watered back control chromium manganese molybdenum cast iron layer temperature when adding covering slag, guarantee covering slag add after as early as possible Rongization And keep liquid.Watered behind the chromium manganese molybdenum cast iron through treating coldly, waited the covering slag laminar surface to be as cold as 900～1100 ℃ and pour into molten ductile cast iron again, the control molten ductile cast iron is opened and is watered 1330～1380 ℃ of temperature and watered to wait and all solidify shutdown afterwards.
3. thermal treatment process:
The centrifugal casting of composite roll circle finishes after the shutdown; the demoulding immediately; the roller circle red send into quenching furnance and be heated to 940～1000 ℃ of scopes; carry out anti-stabilization treatment; be incubated 1～2 hour, quench by taking out in the stove, average 7～10 ℃/min of quench cooling rate is as cold as 600～500 ℃; control again with 20～30 ℃/hr cooling rate and be as cold as 300 ℃ of insulations 1～2 hour, continue to be cooled to 80～100 ℃ of quenchings and finish.Carry out high tempering after the quenching immediately, rate of heating is controlled at 20～30 ℃/hr.The high tempering temperature depends on hardness, and roll surface hardness is in HRC 55～61 scopes after the assurance thermal treatment, and its temperature range is 450～580 ℃.
The invention has the advantages that:
1. solved China's brick-tile industry and utilized smallstone earth, the quality that guarantees brick is in first class brick level.
2. chromium manganese molybdenum cast iron and magnesium iron composite bed are compound closely, and bonding force is strong.
3. composite roll circle thermal treatment process is simple, easy to operate and control, not easy to crack, chromium manganese molybdenum cast iron layer stable performance after the thermal treatment, the hardness height is in HRC 55～61 scopes, roller circle internal stress is little, the roll surface resistance to abrasion is good, and to containing the raw clay of the average 1000 10,000 bricks bases in small, broken bits of small stone stone soil inferior, wearing and tearing are less than 1mm; Be 25 times of hollow steel rolls work-ing life, is 3～4 times of middle manganese magnesium iron.
4. with short production cycle, after thermal treatment, can directly be processed into the finished product roller circle with inserted tool.
5. high speed twin rollers in small, broken bits uses composite anti-wear roll ring of the present invention, because resistance to abrasion is good, the life-span is long, has reduced turning and number of times is installed, and reduces maintenance cost ， And and improves the workshop appliance utilization ratio.
Embodiment
Finished product double-rolle roller rim size: φ 700 * 500mm, thick 80mm, wherein chromium manganese molybdenum cast iron bed thickness 35mm; Spheroidal graphite cast iron bed thickness 45mm.
Chromium manganese molybdenum cast iron composition: 2.14%C, 14.3%Cr, 2.03%Mn, 1.19%Mo, 1.02%Cu, 0.10%V, 0.10%RE(add-on).Chromium manganese molybdenum cast iron is opened and is watered 1465 ℃ of temperature during composite casting, has watered 2/3 iron water amount and has added covering slag.It is thermometric that slag fusing to be protected covers, and slag surface temperature to be protected drops to below 1050 ℃, begins to water molten ductile cast iron, and the molten ductile iron temperature is controlled at 1360 ℃, treats all to solidify the back and shuts down.The demoulding immediately after the shutdown, the roller circle red send in 980 ℃ of stoves and carry out anti-stabilization treatment, 980 ℃ of insulations 2 hours, take out controlled chilling, 8 ℃/mim of cooling rate is as cold as 550 ℃ and controls with 30 ℃/hr again and be as cold as 300 ℃ of insulations 2 hours, slow cooling to 90 ℃ is come out of the stove again.20 ℃/hr of rate of heating control is heated to 200 ℃ of insulations 2 hours during tempering, is heated to 550 ℃ of insulation slow cooling after 3 hours with 30 ℃/hr again, is lower than 100 ℃ and comes out of the stove.
After finishing, thermal treatment becomes the finished product roller circle with the inserted tool machining.Chromium manganese molybdenum cast iron layer hardness is in HRC 55～60 scopes, and microstructure is Cr
7C
3Ledeburite carbide and tempering troostite through UT (Ultrasonic Testing), are not found crackle or loose.
Claims (1)
1, a kind of compound wear resistant double-rolle roller rim production technique is made up of composite casting, thermal treatment process, it is characterized in that:
(1) the outer chromium manganese of composite roll circle molybdenum cast iron composition is: C:1.9～2.6%, Cr:11.0～14.5%, Mn:0.6～2.8%, Mo:1.0～1.9%, Cu:0.9～1.5%, V:0.08～0.20%, RE:0.10～0.20% (add-on)
(2) composite casting technology: with electric arc furnace or medium-frequency induction furnace melting chromium manganese molybdenum cast iron and spheroidal graphite cast iron, chromium manganese molybdenum cast iron pours into opening of whizzer, and to water temperature be 1450～1550 ℃, 100～300 ℃ of mould temperature, open chromium manganese molybdenum cast iron layer temperature when watering back control adding covering slag, guarantee that Rongization And maintenance was liquid as early as possible after covering slag added, watered behind the chromium manganese molybdenum cast iron through treating coldly, be as cold as 900～1100 ℃ Deng the covering slag laminar surface and pour into molten ductile cast iron again, control spheroidal graphite cast iron opens that to water temperature be 1330～1380 ℃, has watered to wait all to solidify shutdown afterwards;
(3) thermal treatment process: after rotational casting is shut down; the demoulding immediately; the roller circle red send into quenching furnance; be heated to 940～1000 ℃ of scopes; carry out anti-stabilization treatment; be incubated 1～2 hour; quench by taking out in the stove, speed of cooling is 7～10 ℃/min, is as cold as 600～500 ℃ and controls with 20～30 ℃/hr cooling rate again and be as cold as 300 ℃; be incubated 1～2 hour; continue to be cooled to 100～80 ℃, quenching finishes, and carries out high tempering then immediately; rate of heating is controlled at 20～30 ℃/hr, and the high tempering temperature is 450～580 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94100942A CN1040342C (en) | 1994-02-01 | 1994-02-01 | Prodn. technique of compound wear resistant double-rolle roller rim |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94100942A CN1040342C (en) | 1994-02-01 | 1994-02-01 | Prodn. technique of compound wear resistant double-rolle roller rim |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1106466A true CN1106466A (en) | 1995-08-09 |
| CN1040342C CN1040342C (en) | 1998-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94100942A Expired - Fee Related CN1040342C (en) | 1994-02-01 | 1994-02-01 | Prodn. technique of compound wear resistant double-rolle roller rim |
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| Country | Link |
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| CN (1) | CN1040342C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100382892C (en) * | 2006-10-19 | 2008-04-23 | 上海大学 | Method for producing high chromium tungsten-containing composite anti-wear roll ring |
| CN101134232B (en) * | 2006-08-28 | 2011-01-19 | 赤峰市恒泰特种钢铸造有限责任公司 | Technique for producing anticentripetal composite abrasion-proof hammer tools |
| CN108788022A (en) * | 2018-06-01 | 2018-11-13 | 太仓市钧胜轧辊有限公司 | A kind of roller surface heat treatment process |
| CN109014044A (en) * | 2018-08-01 | 2018-12-18 | 安徽信息工程学院 | A kind of preparation method of rich chromium cast iron tup |
| CN110449559A (en) * | 2019-09-06 | 2019-11-15 | 朱东阁 | Bimetallic grinding roller of Raymond mill/bull ring and its biliquid centre spinning method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH648353A5 (en) * | 1979-11-19 | 1985-03-15 | Fischer Ag Georg | HIGH-IMPACT CASTING PARTS AND A METHOD FOR THE PRODUCTION THEREOF. |
| CN1011986B (en) * | 1989-01-09 | 1991-03-13 | 山东省冶金设计研究院 | Chrome-molybdenum-vanadium heat-resistant and abrasion-resistant cast iron |
-
1994
- 1994-02-01 CN CN94100942A patent/CN1040342C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101134232B (en) * | 2006-08-28 | 2011-01-19 | 赤峰市恒泰特种钢铸造有限责任公司 | Technique for producing anticentripetal composite abrasion-proof hammer tools |
| CN100382892C (en) * | 2006-10-19 | 2008-04-23 | 上海大学 | Method for producing high chromium tungsten-containing composite anti-wear roll ring |
| CN108788022A (en) * | 2018-06-01 | 2018-11-13 | 太仓市钧胜轧辊有限公司 | A kind of roller surface heat treatment process |
| CN109014044A (en) * | 2018-08-01 | 2018-12-18 | 安徽信息工程学院 | A kind of preparation method of rich chromium cast iron tup |
| CN110449559A (en) * | 2019-09-06 | 2019-11-15 | 朱东阁 | Bimetallic grinding roller of Raymond mill/bull ring and its biliquid centre spinning method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1040342C (en) | 1998-10-21 |
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