CN1297061A - Laser technology for treating surface of cold hard roller, nodular iron casting or gray casting - Google Patents
Laser technology for treating surface of cold hard roller, nodular iron casting or gray casting Download PDFInfo
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- CN1297061A CN1297061A CN 00122389 CN00122389A CN1297061A CN 1297061 A CN1297061 A CN 1297061A CN 00122389 CN00122389 CN 00122389 CN 00122389 A CN00122389 A CN 00122389A CN 1297061 A CN1297061 A CN 1297061A
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Abstract
A laser treating technology for the surface of cold and heard rolling roller, nodular iron casting, or gray casting is disclosed. After the surface of said workpiece is treated by laser, the workpiece features high surface hardness, high antiwear performance, and long service life.
Description
The present invention is chill roll, nodular iron casting, grey casting surface Modification method.The innovative technology that belongs to material surface treatment method.
The current material surface treatment method adopts heat treating methods such as conventional flame surface quenching, medium-high frequency hard surfacing, carburizing mostly, the shortcoming that these methods exist is dumb, its range of application is restricted, particularly large-scale workpiece and complex configuration workpiece are difficult to carry out surface Hardening Treatment more, as the mechanical processing machine lathe bed, its material generally is to select grey cast iron for use, manufacturing process is the annealing again of casting earlier, carry out mechanical workout and moulding then, the surface hardness of these bed ways is not high; Wear no resistance, and after the guide rail surface wearing and tearing, owing to there not being specific equipment to be difficult to repair.In addition, these conventional heat treating methods can not carry out intensive treatment to Iron Casting Surface, semiinfinite (or unlimited) magnesium chilled iron roll, spheroidal graphite cast iron finished product rollgang as Metallurgical Factory's mill use, it is not high that its surface hardness is generally HRC25～28, hardness, wear no resistance, work-ing life is short, and enterprise's these production accessories of annual consumption and equipment part account for 7.2% of its production cost.For this reason, manufacturing enterprise urgently wishes the surface hardness of this class accessory is brought up to more than the HRC56, improving its work-ing life, thereby reduces the consumption costs of these accessories, but is difficult to make it to reach this hardness requirement with conventional heat treating method.
The objective of the invention is to overcome above-mentioned shortcoming and a kind of surface hardness that can effectively improve material is provided, and flexible operation, the laser processing method on the chill roll of applied range, nodular iron casting, grey casting surface.
Laser processing method of the present invention is that it carries out as follows with the surperficial transformation hardening of laser beam with workpiece:
(1) surface of pending material is cleared up, be coated with extinction coating;
(2) be 10 with energy
4～10
5W/cm
2Laser beam rapid scanning workpiece, make workpiece surface be warmed up to temperature T at a terrific speed, temperature T is higher than transformation temperature and is lower than temperature of fusion;
(3) laser beam is left being heated of workpiece and distinguish the surface, workpiece carries out self-quench hardening because of the thermal conduction of itself.
Laser processing method of the present invention is to quench with the surface melting of laser beam with workpiece, and it carries out as follows:
(1) surface of pending material is cleared up, be coated with extinction coating;
(2) with laser beam rapid scanning workpiece, workpiece surface is heated to is melted to certain temperature;
(3) laser beam is left being heated of workpiece and distinguish the surface, workpiece carries out the self cooling crucible zone that makes because of the thermal conduction of itself and is frozen into strengthening layer.
Laser processing method of the present invention is that it carries out as follows with the surface alloying of laser beam with workpiece:
(1) surface of pending material is cleared up, be coated with extinction coating and alloy powder;
(2) with laser beam rapid scanning workpiece, make workpiece surface be heated to fusing;
(3) laser beam is left being heated of workpiece and distinguish the surface, workpiece carries out the self cooling crucible zone that makes because of the thermal conduction of itself and solidifies.
The output rating P of above-mentioned laser beam, spot size D and scan velocity V are:
(1) double indefinite chill spheroidal graphite roll, P gets 1800～2000W, and D gets Φ 4～Φ 5mm, and V gets 0.8～1m/min;
(2) to the indefinite chill spheroidal graphite roll, P gets 2000～2200W, and D gets Φ 4～Φ 5mm, and V gets 4～5m/min;
(3) to nodular iron casting, P gets 2000～2200W, and spot size is got 10mm * 1.5mm, and V gets 0.9m/min;
(4) to grey cast iron, P gets 900～1250W, and D gets Φ 4mm, and V gets 25～26m/min.
Describe particular case of the present invention in detail below in conjunction with embodiment:
Fig. 1 is the principle of work synoptic diagram of the used laser machine for the treatment of processes of the present invention;
Fig. 2 is a laser surface modification treating processes synoptic diagram of the present invention.
Embodiment one:
The present invention is the surperficial transformation hardening to the grey cast iron workpiece, and it carries out as follows
(1) surface of pending material is cleared up, be coated with extinction coating;
(2) be 10 with energy
4～10
5W/cm
2Laser beam rapid scanning workpiece, make workpiece surface be warmed up to temperature T at a terrific speed, temperature T is higher than transformation temperature and is lower than temperature of fusion;
(3) laser beam is left being heated of workpiece and distinguish the surface, workpiece carries out self-quench hardening because of the thermal conduction of itself.
Heat-up rate in the above-mentioned steps (2) is 10
5～10
6℃/S.The speed of cooling of self-quench hardening is 10 in the step (3)
5℃/S.Wherein the output rating P of laser beam is 1200W, and spot size D is 4mm, and scan velocity V is 25.4m/min, and amount of lap is 0.5mm.
The principle of work synoptic diagram of the used laser machine for the treatment of processes of the present invention as shown in Figure 1, CO
2The laser beam that produces in the laser apparatus through speculum again the line focus mirror can scan workpiece after laser beam is focused on.Treating processes synoptic diagram of the present invention as shown in Figure 2, machined surface with the laser beam alignment pieces, irradiated workpiece surface is warmed up at a terrific speed be higher than transformation temperature and is lower than temperature of fusion, subsequently, workpiece travels forward, it is heated the district and leaves laser beam, and then workpiece carries out self-quench hardening because of the thermal conduction of itself, realizes the surperficial transformation hardening of workpiece.
The present invention is owing to adopt rapid heating and quick refrigerative treatment process, and therefore, the sclerotic tissue that workpiece surface is obtained is thin, hardness is brought up to HRc56～60 by HRc20 before handling.
Embodiment two:
The present invention is the surface melting quenching to chrome molybdenum semiinfinite chilled ductile iron workpiece, and it carries out as follows:
(1) surface of pending material is cleared up, be coated with extinction coating;
(2) with laser beam rapid scanning workpiece, workpiece surface is heated to is melted to certain temperature;
(3) laser beam is left being heated of workpiece and distinguish the surface, workpiece carries out the self cooling crucible zone that makes because of the thermal conduction of itself and is frozen into strengthening layer.
Crucible zone tissue in the above-mentioned steps (3) includes melting area, top layer, sublevel solid-state phase changes district, internal layer filtrating area three floor.The output rating P of laser beam is 1800W, and spot size D is 4mm, and scan velocity V is 1m/min, and amount of lap is 1mm.
The principle of work synoptic diagram and the treating processes synoptic diagram of the used laser machine for the treatment of processes of the present invention are identical with embodiment one, respectively as Fig. 1, as shown in Figure 2, the present invention is in the treating processes to workpiece, and with the machined surface of laser beam alignment pieces, the surface melting that makes workpiece is to certain depth, form melting zone, subsequently, workpiece travels forward, and it is heated the district and leaves laser beam, then workpiece carries out self coolingly because of thermal conduction itself, crucible zone is solidified and forms strengthening layer.
The present invention is extremely melted material surface with laser beam heats owing to adopting merely, making consolidation layer and material matrix is the treatment process of natural metallurgical binding, therefore, workpiece surface is in the consolidation process, not only can get rid of its impurity and gas, and its chilling recrystallization can obtain the comparatively tissue of refinement homogeneous and higher hardness, and its hardness is brought up to HRC55 by HRC25 before handling.And its wear resistance and erosion resistance are all better; In addition, because its crucible zone is thin, the heat effect district is little, and less to the roughness and the workpiece size influence of workpiece surface, generalized case can not need be carried out follow-up polishing and directly used.
Embodiment three:
The present invention is the surface alloying to ductile iron workpiece, and it carries out as follows:
(1) surface of pending material is cleared up, be coated with extinction coating and alloying element;
(2) with laser beam rapid scanning workpiece, make workpiece surface be heated to fusing;
(3) laser beam is left being heated of workpiece and distinguish the surface, workpiece carries out the self cooling crucible zone that makes because of the thermal conduction of itself and solidifies.
Alloying element in the above-mentioned steps (3) includes WC, TiC, Co, and its proportioning is WC: TiC: Co=0.8: 0.3: 1.The output rating P of laser beam is 2000W, and the size D of light class is 10 * 1.5mm, and scan velocity V is 0.9m/min.
The principle of work synoptic diagram and the treating processes synoptic diagram of the used laser machine for the treatment of processes of the present invention are identical with embodiment one, respectively as Fig. 1, as shown in Figure 2.The present invention is in the treating processes to workpiece, machined surface with the laser beam alignment pieces, make the workpiece surface fusing alloying element be fused into fast the crucible zone of workpiece surface, subsequently, workpiece travels forward, it is heated the district and leaves laser beam, utilizes the thermal conduction of workpiece own and carries out self coolingly, makes crucible zone solidify the formation strengthening layer.
The present invention makes workpiece surface have the treatment process of specific alloy components containing because employing is fused into workpiece surface with alloying element, therefore, can make workpiece surface reach desired wear-resisting, corrosion resistance nature.Its hardness is brought up to HRC63.8 by the HRC28.4 before handling.
In sum, the present invention is applied range not only, use flexibly, can realize large-scale workpiece and complex configuration workpiece are carried out surface Hardening Treatment, and can carry out intensive treatment to Iron Casting Surface, workpiece hardness is improved, wear resistance is good, long service life, this method are applied to metallurgical industry its production accessory and equipment part are handled, and can improve the work-ing life of its accessory, reduce the consumption costs of accessory, thereby the production cost of enterprise is reduced greatly, and the present invention is that a kind of technology is reasonable, easy to use, its social benefit and economic benefit are all than significant a kind of to chill roll, spheroidal graphite cast iron, the laser processing method on grey cast iron surface.
Claims (9)
1, the laser processing method on chill roll, nodular iron casting, grey casting surface is characterized in that it carries out as follows with the surperficial transformation hardening of laser beam with workpiece
(1) surface of pending material is cleared up, be coated with extinction coating;
(2) be 10 with energy
4～10
5W/cm
2Laser beam rapid scanning workpiece, make workpiece surface be warmed up to temperature T at a terrific speed, temperature T is higher than transformation temperature and is lower than temperature of fusion;
(3) laser beam is left being heated of workpiece and distinguish the surface, make workpiece carry out self-quench hardening because of the thermal conduction of itself.
2, chill roll, the laser processing method on nodular iron casting, grey casting surface is characterized in that quenching with the surface melting of laser beam with workpiece, and it carries out as follows:
(1) surface of pending material is cleared up, be coated with extinction coating;
(2) with laser beam rapid scanning workpiece, workpiece surface is heated to is melted to certain temperature;
(3) laser beam is left being heated of workpiece and distinguish the surface, workpiece carries out the self cooling crucible zone that makes because of the thermal conduction of itself and is frozen into strengthening layer.
3, the laser processing method on chill roll, nodular iron casting, grey casting surface is characterized in that it carries out as follows with the surface alloying of laser beam with workpiece:
(1) surface of pending material is cleared up, be coated with extinction coating and alloying element;
(2) with laser beam rapid scanning workpiece, make workpiece surface be heated to fusing;
(3) laser beam is left being heated of workpiece and distinguish the surface, workpiece carries out the self cooling crucible zone that makes because of the thermal conduction of itself and solidifies.
4, the laser processing method on chill roll according to claim 1, nodular iron casting, grey casting surface is characterized in that the heat-up rate in the above-mentioned steps (2) is 10
5～10
6℃/S.
5, the laser processing method on chill roll according to claim 1, nodular iron casting, grey casting surface is characterized in that the speed of cooling of self-quench hardening in the above-mentioned steps (3) is 10
5℃/S.
6, the laser processing method on chill roll according to claim 2, nodular iron casting, grey casting surface is characterized in that the crucible zone tissue in the above-mentioned steps (3), includes melting area, top layer, sublevel solid-state phase changes district, internal layer filtrating area three floor.
7, the laser processing method on chill roll according to claim 3, nodular iron casting, grey casting surface is characterized in that the alloying element in the above-mentioned steps (3) includes WC, TiC, Co.
8, the laser processing method on chill roll according to claim 7, nodular iron casting, grey casting surface, the proportioning that it is characterized in that above-mentioned alloying element is WC: TiC: Co=0.8: 0.3: 1.
9, according to the laser processing method on claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 described chill rolls, nodular iron casting, grey casting surface, it is characterized in that output rating P, spot size D and the scan velocity V of above-mentioned laser beam is:
(1) double indefinite chill spheroidal graphite roll, P gets 1800～2000W, and D gets Φ 4～Φ 5mm, and V gets 0.8～1m/min;
(2) to the indefinite chill spheroidal graphite roll, P gets 2000～2200W, and D gets Φ 4～Φ 5mm, and V gets 4～5m/min;
(3) to nodular iron casting, P gets 2000～2200W, and spot size is got 10mm * 1.5mm, and V gets 0.9m/min;
(4) to grey cast iron, P gets 900～1250W, and D gets Φ 4mm, and V gets 25～26m/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001223895A CN1155725C (en) | 2000-03-22 | 2000-09-22 | Laser technology for treating surface of cold hard roller, nodular iron casting or gray casting |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00114142 | 2000-03-22 | ||
| CN00114142.2 | 2000-03-22 | ||
| CNB001223895A CN1155725C (en) | 2000-03-22 | 2000-09-22 | Laser technology for treating surface of cold hard roller, nodular iron casting or gray casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1297061A true CN1297061A (en) | 2001-05-30 |
| CN1155725C CN1155725C (en) | 2004-06-30 |
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ID=25739416
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001223895A Expired - Fee Related CN1155725C (en) | 2000-03-22 | 2000-09-22 | Laser technology for treating surface of cold hard roller, nodular iron casting or gray casting |
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| CN (1) | CN1155725C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100443597C (en) * | 2006-06-16 | 2008-12-17 | 中国科学院金属研究所 | Hardening technology for precipitation hardening stainless steel laser surface |
| CN101775474A (en) * | 2010-03-18 | 2010-07-14 | 唐山瑞兆激光技术机械修复有限公司 | Method for strengthening metal sieve plate by laser broadband remelting |
| CN101974666A (en) * | 2010-11-11 | 2011-02-16 | 杭州沪宁电梯配件有限公司 | Laser phase-change strengthening treatment method of wedge block working surface of elevator safety tongs |
| CN101831529B (en) * | 2010-02-05 | 2011-11-30 | 常州轻工职业技术学院 | Laser impacting treatment reinforcing method for crankshaft fillet |
| WO2012126138A1 (en) * | 2011-03-21 | 2012-09-27 | 山东万丰煤化工设备制造有限公司 | Composite modified layer of titanium and titanium alloy and preparing method thereof |
| CN103014249A (en) * | 2012-12-10 | 2013-04-03 | 中国兵器工业第五二研究所 | Laser melting quenching process capable of greatly increasing RuT300 surface hardness |
| CN103590034A (en) * | 2013-10-23 | 2014-02-19 | 广西科技大学 | Alloy powder for medium-nickel/chromium infinite chilled cast iron roll laser surface alloying and alloying technique thereof |
| CN104611536A (en) * | 2015-01-28 | 2015-05-13 | 宜昌金宝乐器制造有限公司 | Device and method for heat treatment of allow iron plate nut |
| CN105483358A (en) * | 2015-12-08 | 2016-04-13 | 四川国鑫机械制造有限公司 | Treatment method for cast iron roll groove |
| CN113564582A (en) * | 2021-07-27 | 2021-10-29 | 安阳睿恒数控机床股份有限公司 | Laser alloying wear-resisting plate and preparation method thereof |
-
2000
- 2000-09-22 CN CNB001223895A patent/CN1155725C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100443597C (en) * | 2006-06-16 | 2008-12-17 | 中国科学院金属研究所 | Hardening technology for precipitation hardening stainless steel laser surface |
| CN101831529B (en) * | 2010-02-05 | 2011-11-30 | 常州轻工职业技术学院 | Laser impacting treatment reinforcing method for crankshaft fillet |
| CN101775474B (en) * | 2010-03-18 | 2013-03-27 | 唐山瑞兆激光技术机械修复有限公司 | Method for strengthening metal sieve plate by laser broadband remelting |
| CN101775474A (en) * | 2010-03-18 | 2010-07-14 | 唐山瑞兆激光技术机械修复有限公司 | Method for strengthening metal sieve plate by laser broadband remelting |
| CN101974666A (en) * | 2010-11-11 | 2011-02-16 | 杭州沪宁电梯配件有限公司 | Laser phase-change strengthening treatment method of wedge block working surface of elevator safety tongs |
| CN101974666B (en) * | 2010-11-11 | 2012-09-19 | 杭州沪宁电梯配件有限公司 | Laser phase-change strengthening treatment method of wedge block working surface of elevator safety tongs |
| WO2012126138A1 (en) * | 2011-03-21 | 2012-09-27 | 山东万丰煤化工设备制造有限公司 | Composite modified layer of titanium and titanium alloy and preparing method thereof |
| CN103014249A (en) * | 2012-12-10 | 2013-04-03 | 中国兵器工业第五二研究所 | Laser melting quenching process capable of greatly increasing RuT300 surface hardness |
| CN103014249B (en) * | 2012-12-10 | 2014-10-08 | 北方材料科学与工程研究院有限公司 | Laser melting quenching process capable of greatly increasing RuT300 surface hardness |
| CN103590034A (en) * | 2013-10-23 | 2014-02-19 | 广西科技大学 | Alloy powder for medium-nickel/chromium infinite chilled cast iron roll laser surface alloying and alloying technique thereof |
| CN104611536A (en) * | 2015-01-28 | 2015-05-13 | 宜昌金宝乐器制造有限公司 | Device and method for heat treatment of allow iron plate nut |
| CN105483358A (en) * | 2015-12-08 | 2016-04-13 | 四川国鑫机械制造有限公司 | Treatment method for cast iron roll groove |
| CN113564582A (en) * | 2021-07-27 | 2021-10-29 | 安阳睿恒数控机床股份有限公司 | Laser alloying wear-resisting plate and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1155725C (en) | 2004-06-30 |
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Granted publication date: 20040630 Termination date: 20120922 |