CN102828190A - Improved heat processing method of corrugating roller - Google Patents
Improved heat processing method of corrugating roller Download PDFInfo
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- CN102828190A CN102828190A CN2011101586666A CN201110158666A CN102828190A CN 102828190 A CN102828190 A CN 102828190A CN 2011101586666 A CN2011101586666 A CN 2011101586666A CN 201110158666 A CN201110158666 A CN 201110158666A CN 102828190 A CN102828190 A CN 102828190A
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- corrugation roller
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- corrugation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention discloses an improved heat processing method of a corrugating roller. The method is characterized by comprising a composite processing and a cryogenic treatment, and comprises steps: (1) nitridation processing, comprising putting the corrugating roller into a nitridation furnace, processing with nitridation for 45 to 50 hours under the temperature of 550 to 570 DEG C, and then taking out; (2) frequency surface hardening processing, comprising quenching the corrugating roller of step (1) by using a medium-frequency induction heating device; and (3) cryogenic treatment, comprising putting the corrugating roller in a cryogenic furnace to perform the cryogenic treatment by using liquid nitrogen as a refrigerant, wherein the temperature of the corrugating roller is firstly dropped to -80 to -100 DEG C and the corrugating roller is kept for 65 to 70 minutes under such temperature, secondly dropped to -110 to 130 DEG C and kept for 180 to 230 minutes, and thirdly dropped to -180 to -230 DEG C and kept for 280 to 320 minutes. By using the composite processing and the cryogenic treatment, the corrugating roller has improved anti-tempering performance, and has characteristics of obviously fine grain, uniform organization, stable size and improved toughness.
Description
Technical field
The present invention relates to a kind of treatment production technology, particularly a kind of improved corrugation roller heat treating method.Belong to metallic substance thermal treatment and light industry manufacturing technology field.
Background technology
The corrugation roller is the key part on the corrugated paper board production line, and the thermal treatment quality of corrugation roller is the important indicator in the work-ing life of examination corrugation roller.Directly have influence on the startup-shutdown time of corrugated paper board production line, at present, the intermediate frequency hard surfacing is generally adopted in the thermal treatment to the corrugation roller in industry, also has small portion producer to do nitriding treatment; Perhaps adopt laser treatment,, there is defective separately in these heat treating methods: (1) intermediate frequency hard surfacing, though its surperficial hard formation of corrugation roller can reach 5mm; But its hardness is low, has only HRC52～56, and maximum defective is that anti-tempered performance is poor, when 180 ℃ of temperature; Its hardness just drops to HRC48～52, and Hardness Distribution is inhomogeneous, and soft spots is arranged, and also there is this problem in laser treatment; Steam or natural gas heat because the corrugation roller when on board production, producing cardboard, all will lead to, and leads to steam-heated; Temperature reaches 180 ℃, logical natural gas, temperature is up to 250～300 ℃; Under this temperature, the hardness of corrugation roller has just descended a lot, and hardness has only HRC48～50.The corrugation roller is easy to wearing and tearing like this, even pit occurs, has a strong impact on the cardboard quality.(2) the corrugation roller of nitriding treatment, its hard formation is shallow, has only 0.25～0.4mm, so, pit, pit phenomenon in use can appear, influence the cardboard quality.(3) the corrugation roller of laser treatment, its hardness is shallow, has only 0.80mm, in addition; Because the LASER HEATING temperature is high, causes the flank of tooth to dissolve, and has so just reduced the smooth finish and the profile accuracy of corrugation roller; Produce the monodentate torsional deformation, have a strong impact on the identical precision of corrugation roller, thereby sting the tooth phenomenon.
Summary of the invention
The object of the invention is in order to solve the problem that prior art exists, a kind of improved corrugation roller heat treating method to be provided.Has the advantage that remained austenite content can obviously reduce, organize dimensional stabilizing.
The object of the invention can reach through following technical scheme:
A kind of improved corrugation roller heat treating method is characterized in that: comprise two handling procedures of Combined Processing and sub-zero treatment, said Combined Processing is meant elder generation with doing the intermediate frequency hard surfacing again after the nitrogenize of corrugation roller, and concrete steps are following:
1) nitriding treatment
The corrugation roller is positioned in the nitriding furnace, as nitridizing agent, is to carry out nitriding treatment under 550 ℃～570 ℃ the temperature condition to take out after 45～50 hours with ammonia in temperature;
2) hard surfacing is frequently handled
With Intermediate Frequency Induction Heating Equipment to 1) the corrugation roller that takes out in the step carries out quench treatment, when carrying out quench treatment, earlier temperature is heated to 850 ℃～870 ℃, then under this temperature through using the PAG quenching medium to the cooling of corrugation roller spray;
3) sub-zero treatment
Will be through 2) corrugation roller after the step handles is positioned in the deep cooling stove; Carry out sub-zero treatment with liquid nitrogen as refrigeration agent; Sub-zero treatment comprises three steps: at first make the temperature of corrugation roller drop to-80 ℃～-100 ℃ deep cooling stove running refrigerating, under this temperature, be incubated 65～70 minutes; Move said deep cooling stove once more and make the corrugation roll temperature further drop to-110 ℃～-130 ℃, be incubated 180～230 minutes again; Move the deep cooling stove for the third time and make the corrugation roll temperature drop to-180 ℃～-230 ℃, be incubated 280～320 minutes again; Accomplish whole corrugation roller heat treatment process.
The object of the invention can also reach through following technical scheme:
A kind of embodiment of the present invention is: the rate of decomposition of ammonia can be 35%～60% in the nitriding treatment process of step 1).
A kind of embodiment of the present invention is: the nitriding furnace described in the step 1) can be 160KW deep-well nitriding furnace.
A kind of embodiment of the present invention is: the Intermediate Frequency Induction Heating Equipment step 2) can be the 500KW medium frequency equipment.
A kind of embodiment of the present invention is: the heater voltage step 2) can be 8KV～9.5KV, and heating current can be 580A～750A.
A kind of embodiment of the present invention is: the deep cooling stove described in the step 3) can be well formula deep cooling stove.
The present invention has following outstanding beneficial effect:
1, the present invention combines nitriding treatment and the hard-faced advantage of intermediate frequency; The surface hardness that can effectively improve the corrugation roller particularly under the processing condition (comprising temperature condition and time conditions) that the present invention limited, makes the surperficial existing higher hardness (HRC60～62) of corrugation roller, can obtain darker hard formation (effectively hard formation can reach more than the 3mm) again; Has the reduction solution strengthening; Strengthen dispersion-strengthened effect, help improving the toughness of corrugation roller, impelling strength is improved.
2, the present invention adopts Combined Processing (nitriding treatment+intermediate frequency hard surfacing) and sub-zero treatment, has improved the anti-tempered performance of corrugation roller greatly, and the refinement significantly of the crystal grain after sub-zero treatment is organized more evenly, and size is more stable.
Description of drawings
Fig. 1 is technological process of production figure of the present invention.
Embodiment
Specific embodiment 1:
Fig. 1 constitutes specific embodiment 1 of the present invention.
With reference to Fig. 1, the treatment production technology of corrugation roller may further comprise the steps:
1) nitriding treatment
The corrugation roller is positioned in the nitriding furnace, and as nitridizing agent, ammonia dissociation rate is 35%～60% with ammonia, and nitriding temperature is 550 ℃～570 ℃, and nitrogenize was taken out in 48 hours;
2) intermediate frequency hard surfacing
With Intermediate Frequency Induction Heating Equipment to 1) the corrugation roller that takes out in the step quenches, heater voltage is 8KV～9.5KV, heating current is 580A～750A, Heating temperature is 850 ℃～870 ℃; Then through using the PAG quenching medium to the cooling of corrugation roller spray;
3) sub-zero treatment
Will be through 2) corrugation roller after the step handles is positioned in the deep cooling stove, carries out sub-zero treatment with liquid nitrogen as refrigeration agent, and operation earlier made the corrugation roll temperature drop to-90 ℃ in 100 minutes, was incubated 60 minutes again; Move 90 minutes then and make the corrugation roll temperature drop to-120 ℃, be incubated 200 minutes again; Move 120 minutes at last and make the corrugation roll temperature drop to-190 ℃, be incubated 300 minutes again, whole technology is accomplished.
In the present embodiment, the nitriding furnace described in the step 1) can be the 160KW deep-well nitriding furnace of routine, and said PAG quenching medium can adopt conventional PAG quenching medium; Step 2) Intermediate Frequency Induction Heating Equipment described in can be the 500KW medium frequency equipment of routine; Deep cooling stove described in the step 3) is conventional well formula deep cooling stove.
The corrugation roller can obtain following result through after the art breading of present embodiment 1:
1, the surface hardness of corrugation roller increases, and is brought up to the surface hardness of HRC59～66 visible sub-zero treatment can further the raising effectively corrugation roller by HRC55～58.
2, the remained austenite content of corrugation roller has obvious minimizing; Transformation stress obtains basically eliminate, and big degree of supersaturation gets that martensite containing nitrogen is decomposed, refinement, and a large amount of fine carbides and Fe-N compound are separated out; Reduce solution strengthening; Strengthen dispersion-strengthened effect, help improving the toughness of corrugation roller, impelling strength is improved.
3, the wear resistance of corrugation roller is significantly improved, and major cause is the result of the nitrogen-atoms solution strengthening of high density, and is also relevant with its diffusion-precipitation Fe-N compound in addition.
4, the refinement significantly of the crystal grain after sub-zero treatment is organized more evenly, and size is more stable.
5, the anti-tempered performance of corrugation roller improves widely, and tempering temperature is got 270～300 ℃, and its hardness all has HRC60.
From above result, the corrugation roller after art breading of the present invention has overcome merely with medium frequency quenching or nitriding treatment or the existing defective of laser treatment fully.
Specific embodiment 2:
The characteristics of present embodiment 2 are: the nitriding treatment time of step 1) is 45 hours or 50 hours; Sub-zero treatment in the step 3) comprises three steps: at first make the temperature of corrugation roller drop to-80 ℃ or-100 ℃ deep cooling stove running refrigerating, insulation is 55 minutes or 70 minutes under this temperature; Move the deep cooling stove once more and make the corrugation roll temperature further drop to-110 ℃ or-130 ℃, be incubated 180 minutes again or 230 minutes; Move this deep cooling stove for the third time and make the corrugation roll temperature drop to-180 ℃ or-230 ℃, be incubated 280 minutes again or 320 minutes; Accomplish whole corrugation roller heat treatment process.All the other are with specific embodiment 1.
The present invention has combined nitriding treatment and the hard-faced advantage of intermediate frequency, makes the surperficial existing higher hardness (HRC60～62) of corrugation roller, can obtain darker hard formation (effectively hard formation can reach more than the 3mm) again, because the corrugation roller after the nitrogenize is after the intermediate frequency hard surfacing; Nitride changes martensite containing nitrogen into, and the hardness of martensite containing nitrogen is high, and wear resistance is good, but if just carry out Combined Processing; There is residual austenite in the tooth surface of corrugation roller all the time after medium frequency quenching, cause organizing size all unstable; And martensite containing nitrogen fragility is big, and the corrugation roller is easy to collapse tooth, so; The corrugation roller also will carry out sub-zero treatment after Combined Processing, after sub-zero treatment, the remained austenite content on corrugation roller surface can obviously reduce; Organize size to obtain stabilization better, the impelling strength of corrugation roller is improved, also improved anti-tempered performance simultaneously greatly.
Claims (6)
1. improved corrugation roller heat treating method is characterized in that: comprise two handling procedures of Combined Processing and sub-zero treatment, said Combined Processing is meant that earlier with doing the intermediate frequency hard surfacing again after the nitrogenize of corrugation roller, concrete steps are following:
1) nitriding treatment
The corrugation roller is positioned in the nitriding furnace, as nitridizing agent, is to carry out nitriding treatment under 550 ℃～570 ℃ the temperature condition to take out after 45～50 hours with ammonia in temperature;
2) hard surfacing is frequently handled
With Intermediate Frequency Induction Heating Equipment to 1) the corrugation roller that takes out in the step carries out quench treatment, when carrying out quench treatment, earlier temperature is heated to 850 ℃～870 ℃, then under this temperature through using the PAG quenching medium to the cooling of corrugation roller spray;
3) sub-zero treatment
Will be through 2) corrugation roller after the step handles is positioned in the deep cooling stove; Carry out sub-zero treatment with liquid nitrogen as refrigeration agent; Sub-zero treatment comprises three steps: at first make the temperature of corrugation roller drop to-80 ℃～-100 ℃ deep cooling stove running refrigerating, under this temperature, be incubated 65～70 minutes; Move said deep cooling stove once more and make the corrugation roll temperature further drop to-110 ℃～-130 ℃, be incubated 180～230 minutes again; Move the deep cooling stove for the third time and make the corrugation roll temperature drop to-180 ℃～-230 ℃, be incubated 280～320 minutes again; Accomplish whole corrugation roller heat treatment process.
2. a kind of improved corrugation roller heat treating method according to claim 1, it is characterized in that: the rate of decomposition of ammonia is 35%～60% in the nitriding treatment process of step 1).
3. a kind of improved corrugation roller heat treating method according to claim 1, it is characterized in that: the nitriding furnace described in the step 1) is a 160KW deep-well nitriding furnace.
4. a kind of improved corrugation roller heat treating method according to claim 1 is characterized in that: step 2) described in Intermediate Frequency Induction Heating Equipment be the 500KW medium frequency equipment.
5. a kind of improved corrugation roller heat treating method according to claim 1 is characterized in that: step 2) described in heater voltage be 8KV～9.5KV, heating current can be 580A～750A.
6. a kind of improved corrugation roller heat treating method according to claim 1 is characterized in that: the deep cooling stove described in the step 3) is a well formula deep cooling stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101586666A CN102828190A (en) | 2011-06-14 | 2011-06-14 | Improved heat processing method of corrugating roller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101586666A CN102828190A (en) | 2011-06-14 | 2011-06-14 | Improved heat processing method of corrugating roller |
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| CN102828190A true CN102828190A (en) | 2012-12-19 |
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| CN2011101586666A Pending CN102828190A (en) | 2011-06-14 | 2011-06-14 | Improved heat processing method of corrugating roller |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103305669A (en) * | 2013-06-14 | 2013-09-18 | 中国科学院理化技术研究所 | Cryogenic treatment method for improving dimensional stability of GCr15 steel |
| CN105624369A (en) * | 2015-09-09 | 2016-06-01 | 上海大松瓦楞辊有限公司 | Corrugated roller machining method |
| CN110499488A (en) * | 2019-09-12 | 2019-11-26 | 佛山市顺德区矗泰金属热处理有限公司 | A kind of Corrugator roller thermal treatment production process |
| CN111020462A (en) * | 2019-11-22 | 2020-04-17 | 中国航发西安动力控制科技有限公司 | Treatment method capable of improving surface hardness of tungsten-molybdenum high-speed steel |
| CN114262783A (en) * | 2021-12-22 | 2022-04-01 | 安徽工业大学 | Nested surface superhard composite roll for high temperature superconducting base belt and preparation method thereof |
-
2011
- 2011-06-14 CN CN2011101586666A patent/CN102828190A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103305669A (en) * | 2013-06-14 | 2013-09-18 | 中国科学院理化技术研究所 | Cryogenic treatment method for improving dimensional stability of GCr15 steel |
| CN103305669B (en) * | 2013-06-14 | 2015-10-07 | 中国科学院理化技术研究所 | Cryogenic treatment method for improving dimensional stability of GCr15 steel |
| CN105624369A (en) * | 2015-09-09 | 2016-06-01 | 上海大松瓦楞辊有限公司 | Corrugated roller machining method |
| CN110499488A (en) * | 2019-09-12 | 2019-11-26 | 佛山市顺德区矗泰金属热处理有限公司 | A kind of Corrugator roller thermal treatment production process |
| CN111020462A (en) * | 2019-11-22 | 2020-04-17 | 中国航发西安动力控制科技有限公司 | Treatment method capable of improving surface hardness of tungsten-molybdenum high-speed steel |
| CN114262783A (en) * | 2021-12-22 | 2022-04-01 | 安徽工业大学 | Nested surface superhard composite roll for high temperature superconducting base belt and preparation method thereof |
| CN114262783B (en) * | 2021-12-22 | 2024-01-02 | 安徽工业大学 | Nested surface superhard composite roller for superconductive baseband and preparation method thereof |
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Application publication date: 20121219 |