CN1111609C - Centrifugal casting process of producing antiwear composite multicomponent alloy-cast iron roller ring - Google Patents
Centrifugal casting process of producing antiwear composite multicomponent alloy-cast iron roller ring Download PDFInfo
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- CN1111609C CN1111609C CN 99107454 CN99107454A CN1111609C CN 1111609 C CN1111609 C CN 1111609C CN 99107454 CN99107454 CN 99107454 CN 99107454 A CN99107454 A CN 99107454A CN 1111609 C CN1111609 C CN 1111609C
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Abstract
The present invention provides production technology for a centrifugal casting cast iron composite antiwear roller ring with a multicomponent alloy. The technology is composed of centrifugal composite casting technology and heat treatment technology. The present invention is characterized in that an outer layer of the composite roller ring is multicomponent alloy antiwear cast iron containing nitrogen, and the outer layer comprises the components of 2.0 to 3.6% of C, 7.0 to 23.0% of Cr, at most 2.0% of Mn, at most 2.0% of Si, at most 3.0% of Mo, at most 2.0% of Cu, 0.005 to 0.10% of N and 0.02 to 0.03% of Re; an internal layer is common nodular cast iron with high strength. The present invention has the advantages of good antiwear performance, small internal stress, long service life and low cost. The centrifugal casting cast iron composite antiwear roller ring is used for crushing hard materials such as small stones, coal slack, etc., in the industry of construction materials such as brick production, etc.
Description
The invention provides a kind of outer composition of layer, recombining process and thermal treatment process of composite roll circle.
With correlation technique of the present invention the outer field chromium manganese of the compound wear resistant double-rolle roller rim molybdenum cast iron of China patent No. ZL94 1 009424 is arranged, its composition is (%): C1.9～2.6, Cr11.0～14.5%, Mn0.6～2.8%, Mo1.0～1.9%, Cu0.9～1.5, V0.08～0.20, RE0.01～0.02.High its composition of chrome molybdenum cast iron of U.S. climax company is (%): C2.8～3.5, Cr14～16, Mo1.9～2.2, Cu0.5～1.2, Mn0.6～0.9.USSR (Union of Soviet Socialist Republics) antifriction cast iron composition is (%): C2.7～3.1, Cr12～15, Mo0.5～0.6, Mn3.3～3.9.
The double-rolle roller rim product of domestic present use has two kinds: a kind of is middle carbon hollow steel rolls circle, and another kind is middle manganese magnesium iron roller circle.Its common drawback be wear no resistance, work-ing life is low.The former is no more than 40 days entire life.The latter since manganese content higher, smelt that the composition fluctuation is big, stability is poor, work-ing life, fluctuation was big, about 4 months of the highest work-ing life, and can't reach the broken requirement of colliery wastes brick.
The object of the present invention is to provide a kind of high-wearing feature, low internal stress, high tenacity, high work-ing life, ratio of performance to price excellence, be suitable for the polynary composite anti-wear roll ring production technique of mechanically resistant material fragmentations such as coal gangue and small stone stone.
Of the present invention constituting:
1. adopt the cladding material of nitrogenous complex alloyed cast iron as the roller circle.Nitrogen can increase and the refinement carbide, solution strengthening matrix, thereby the hardness and the toughness of raising antifriction cast iron.But the rare earth purifying molten iron is improved the flowability of iron liquid, the structure of cast iron of refinement simultaneously.Manganese, molybdenum, copper rationally are used, and can further improve the effect of these elements itself and give full play to interaction between each element, thereby improve the as-cast structure of cast iron, improve its hardening capacity.Thereby improve its comprehensive mechanical property.The chemical ingredients of complex alloyed cast iron (%) is: C2.0～3.6, Cr7.0～23.0, Mn≤2.0, Si≤2.0, Mo≤3.0, Cu≤2.0, N0.005～0.10, RE0.02～0.03.
2. adopt the rotary casting compound casting technique.With induction furnace, cupola furnace or electric arc furnace difference melting complex alloyed cast iron and spheroidal graphite cast iron.The composition of spheroidal graphite cast iron is (%): C3.7～4.0%, Si2.2～2.6%, Mn≤0.6%, P≤0.03%, S≤0.02%, RE≤0.03%, surplus Fe.Adopt centrifugal casting technique, open that the mould temperature is 200～250 ℃ when watering, it is 1430～1500 ℃ that the opening of complex alloyed cast iron watered temperature, and complex alloyed cast iron pours into about 2/3 back and adds covering slag.Watered whole complex alloyed cast irons, and treated to pour into common spheroidal graphite cast iron after its surface temperature is cooled to 850～1000 ℃.It is 1300～1400 ℃ that the opening of spheroidal graphite cast iron watered temperature.Spheroidal graphite cast iron solidifies the back fully shuts down.
3. adopt hot charging quenching+tempering heat treatment process.After rotational casting is shut down; the demoulding immediately, the roller circle red send into quenching furnance insulation, treat that furnace temperature is stable after; be heated to 940～1000 ℃; be incubated 2.5 hours, quench by taking out in the stove, controlled chilling speed is 5～8 ℃/min; be cooled to 520～450 ℃; be incubated 1 hour, control with 15～25 ℃/h speed of cooling again and be cooled to be lower than 80 ℃, quenching finishes.Carry out tempering then immediately, tempering temperature is controlled at 400～550 ℃ of temperature ranges, is incubated 2 hours.Be cooled to come out of the stove below 100 ℃ with 30 ℃/h speed.
The invention has the advantages that:
1 has solved China's brick-tile industry utilizes coal gangue, and guarantees the tooling problem of the quality of brick in the first class level.
2. by two kinds of metal composite castings, solved the contradiction of roller circle high-wearing feature and high-strong toughness.
3. the thermal cycle is short, easy to operate.Roller circle performance quality good stability after the thermal treatment, the surface hardness height, between HRC56～63, wear resistance is good, and internal stress is little, and the anti-vibration ability is strong.To coal gangue in small, broken bits or small stone soil, be 30 times of hollow steel rolls circle work-ing life, is more than 5 times of middle manganese magnesium iron.Solved a difficult problem of utilizing making coal gangue brick.
4. the thermal treatment energy consumption has been saved in cast back direct quenching, has shortened heat treatment cycle.
5. can directly be processed into finished product with inserted tool.
6. high speed twin rollers in small, broken bits uses multicomponent alloyed cast iron roll circle of the present invention, has guaranteed to produce normally to carry out, and has reduced the number of times of parking reconditioning roller circle, has improved workshop appliance utilization ratio and labour productivity, has reduced maintenance cost.
Embodiment
Finished product double-rolle roller rim size: 700 * 500mm, thick 70mm, complex alloyed cast iron bed thickness 35mm wherein, spheroidal graphite cast iron bed thickness 35mm.
Multicomponent alloy magnesium iron composition (%): C2.71, Cr16.14, Mn1.18, Mo1.55, Cu1.01, Ni0.38, N0.023, RE0.022, surplus Fe.Multicomponent alloy magnesium iron teeming temperature is 1456 ℃, has watered 2/3 iron liquid and has added covering slag, and the complex alloyed cast iron surface temperature begins to pour into a mould spheroidal graphite cast iron when dropping to 1000 ℃, and the teeming temperature of spheroidal graphite cast iron is 1340 ℃.After treating that the roller circle solidifies, send quenching furnance immediately, and be heated to 950 ℃, be incubated 2.5 hours, quench by taking out in the stove, controlled chilling speed is 5～8 ℃/min.Be cooled to 450 ℃, be incubated 1 hour, control with 25 ℃/h speed of cooling again and be cooled to be lower than 80 ℃, quenching finishes.Carry out tempering then immediately, tempering temperature is controlled at 400～550 ℃ of temperature ranges, is incubated 2 hours.Be cooled to come out of the stove below 100 ℃ with 30 ℃/h speed.
Claims (2)
1. rotary casting antiwear composite multicomponent alloy-cast iron roller ring, it is characterized in that composite roll circle skin is nitrogenous multicomponent alloy antifriction cast iron, composition (%) is: C 2.0～3.6, Cr 7.0～23.0, Mn≤2.0, Si≤2.0, Mo≤3.0, Cu≤2.0, N 0.05～0.10, RE 0.02～0.03, surplus is Fe, and internal layer is a high-strength common spheroidal graphite cast iron.
2. the production technique of the described composite anti-wear roll ring of claim 1 is made up of composite casting and thermal treatment process, it is characterized in that:
A. composite casting technology: with cupola furnace, medium-frequency induction furnace or arc melting complex alloyed cast iron and spheroidal graphite cast iron, adopt centrifugal casting technique, open that the mould temperature is 200～250 ℃ when watering, it is 1430～1500 ℃ that the opening of complex alloyed cast iron watered temperature, complex alloyed cast iron pours into 2/3 back and adds covering slag, whole complex alloyed cast irons have been watered, and treat to pour into common spheroidal graphite cast iron after its surface temperature is cooled to 850～1000 ℃, it is 1300～1400 ℃ that the opening of spheroidal graphite cast iron watered temperature, and spheroidal graphite cast iron solidifies the back fully shuts down;
B. thermal treatment process: after rotational casting is shut down; the demoulding immediately; the roller circle red send into quenching furnance insulation; after treating that furnace temperature is stable; be heated to 940～1000 ℃; be incubated 2.5 hours, quench by taking out in the stove, controlled chilling speed is 5～8 ℃/min; be cooled to 520～450 ℃; be incubated 1 hour, control with 15～25 ℃/h speed of cooling again and be cooled to be lower than 80 ℃, quenching finishes; carry out tempering then immediately; tempering temperature is controlled at 400～550 ℃ of temperature ranges, is incubated 2 hours, is cooled to come out of the stove below 100 ℃ with 30 ℃/h speed again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99107454 CN1111609C (en) | 1999-05-21 | 1999-05-21 | Centrifugal casting process of producing antiwear composite multicomponent alloy-cast iron roller ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99107454 CN1111609C (en) | 1999-05-21 | 1999-05-21 | Centrifugal casting process of producing antiwear composite multicomponent alloy-cast iron roller ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1241644A CN1241644A (en) | 2000-01-19 |
| CN1111609C true CN1111609C (en) | 2003-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99107454 Expired - Fee Related CN1111609C (en) | 1999-05-21 | 1999-05-21 | Centrifugal casting process of producing antiwear composite multicomponent alloy-cast iron roller ring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101503010B (en) * | 2009-01-21 | 2012-10-03 | 成都三强轧辊股份有限公司 | Steel ring wear-resistant casting parts and method for producing the same |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100453674C (en) * | 2005-11-10 | 2009-01-21 | 西安交通大学 | Low cost, high-wearability hypereutectic high chromium cast iron and its production method |
| CN101121996B (en) * | 2007-09-21 | 2010-12-01 | 武汉钢铁(集团)公司 | Outer layer material used for centrifugal roller |
| CN110747387A (en) * | 2019-12-04 | 2020-02-04 | 山东汇丰铸造科技股份有限公司 | Manufacturing method of high-strength wear-resistant nodular cast iron |
-
1999
- 1999-05-21 CN CN 99107454 patent/CN1111609C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101503010B (en) * | 2009-01-21 | 2012-10-03 | 成都三强轧辊股份有限公司 | Steel ring wear-resistant casting parts and method for producing the same |
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| Publication number | Publication date |
|---|---|
| CN1241644A (en) | 2000-01-19 |
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