CN100595329C - Metallurgical cast iron roll surface laser nanometer ceramic alloying processing method - Google Patents

Metallurgical cast iron roll surface laser nanometer ceramic alloying processing method Download PDF

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Publication number
CN100595329C
CN100595329C CN200810053053A CN200810053053A CN100595329C CN 100595329 C CN100595329 C CN 100595329C CN 200810053053 A CN200810053053 A CN 200810053053A CN 200810053053 A CN200810053053 A CN 200810053053A CN 100595329 C CN100595329 C CN 100595329C
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China
Prior art keywords
roll
laser
cast iron
coating
iron roll
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Expired - Fee Related
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CN200810053053A
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CN101265575A (en
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郎娟
陈东长
冯加旺
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TIANJIN HUILITONG METAL SURFACE TREATMENT TECHNIQUE CO Ltd
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TIANJIN HUILITONG METAL SURFACE TREATMENT TECHNIQUE CO Ltd
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Priority to CN200810053053A priority Critical patent/CN100595329C/en
Publication of CN101265575A publication Critical patent/CN101265575A/en
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Abstract

A method for the surface laser nanometer ceramic alloying treatment of a metallurgical cast iron roll includes the following steps: pre-treating the surface of the cast iron roll, cold-spraying the liquid of nanometer ceramal paint and water glass on the surface of the cast iron roll to form a spray coating; carrying out laser alloying treatment to the spray coating with a laser to form an alloy strengthened coating, etc. The method for the surface laser nanometer ceramic alloying treatment of the metallurgical cast iron roll is provided by the invention to form the superfine, high-obdurability, and abrasion-proof alloy strengthened coating. As the alloy strengthened coating has refined surface grain, increased dislocation density and even and compact structure, and eliminates the defectsin the prior structure such as stress, segregation, microcrack, pore, slag inclusion and so on, thereby efficiently improving the surface strength of the roll and further restraining the generation ofcrack, so that the roll can be ensured not to have softening phenomenon due to the annealing in the high-temperature rolling process. In addition, the strength of the roll is improved as well as thetoughness and the plasticity thereof.

Description

A kind of surface laser nanometer ceramic alloying processing method of metallurgical cast iron roll
Technical field
The invention belongs to metallurgical technology field, particularly relate to a kind of surface laser nanometer ceramic alloying processing method of metallurgical cast iron roll.
Background technology
Steel rolling industry in metallurgical system grain roll commonly used mainly is divided into well-established law indefinite chill spheroidal graphite roll and rotational casting indefinite chill spheroidal graphite roll, the former utilizes the condensate depression of molten iron self and the method for die surface Quench to make, and the latter adopts rotational casting technology to make.As everyone knows, roll normally uses in about 1000 ℃ high-temperature work environment, and the surging force that is subjected to and repeated stress are bigger, so the roll working-surface wearing and tearing and thermal crack occur through regular meeting.Particularly shaped steel, bar roll pass are bigger, above-mentioned two kinds of casting techniques all can't effectively improve the work-ing life of roll, so in making processes, in molten iron, add alloying constituents such as a certain proportion of Ni, Cr, Mo usually, to improve the surface abrasion resistance of roll, thereby prolong the roll change cycle, but can increase the manufacturing cost of roll so again greatly.In the operation of rolling, along with the variation of metal unit elongation, each rolling mill roll working hour difference in the therefore further work-ing life that prolongs roll, becomes the key of enhancing productivity, lower rolling cost simultaneously.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide and a kind ofly can improve surface strength, toughness and plasticity, therefore can prevent to occur in the use surface laser nanometer ceramic alloying processing method of the metallurgical cast iron roll of problem such as crackle.
In order to achieve the above object, the surface laser nanometer ceramic alloying processing method of metallurgical cast iron roll provided by the invention comprises the following step that carries out in order:
(1) pre-treatment is carried out on the surface of grain roll, to remove attached to its lip-deep greasy dirt and impurity;
(2), utilize then that spray gun is cold to be sprayed on above-mentioned roller surface through surface preparation to form sprayed coating with nano ceramics alloy coating and water glass liquid ratio uniform mixing with 1: 3;
(3) adopt CO 2The cross-flow type laser apparatus is at 6 * 1mm 2The speed of hot spot, 700~800mm/min and the amount of lap condition of 1.0mm under above-mentioned sprayed coating is carried out Laser Alloying Treatment, to form alloy enhanced layer.
Described nano ceramics alloy coating is the uniform mixture of 8~12% nano-scale carbons, 10~15% Tungsten oxide 99.999s, 12~18% titanium oxide, 16~20% chromic oxide, 20~30% zirconium whites and 18~20% aluminium sesquioxides.
The thickness of described sprayed coating is 0.4~1.0mm.
The surface laser nanometer ceramic alloying processing method of metallurgical cast iron roll provided by the invention is to utilize the high-energy-density laser beam that the cold nano ceramics alloy coating layer that is sprayed on roller surface is in advance carried out Laser Alloying Treatment, thereby forms the alloy enhanced layer of super-refinement, high-strong toughness, high abrasion at roller surface.Because the surface grain refinement of this alloy enhanced layer, dislocation desity increase, the homogeneous microstructure densification, and defectives such as the stress in the original structure, segregation, tiny crack, pore, slag inclusion have been eliminated, the solid dispersion-strengthened action that melts reinforcement and super-refinement compound etc. that also has the supersaturation alloy simultaneously, therefore can improve the surface strength of roll effectively, thereby suppress the generation of crackle, thereby can guarantee that roll can not produce the remollescent phenomenon owing to annealing in the high temperature rolling process.When improving roll strength, its toughness and plasticity have also been improved in addition, steel transportation amount is significantly improved on the original basis, wherein the steel transportation amount of well-established law indefinite chill spheroidal graphite roll improves 2~3 times, and the steel transportation amount of rotational casting indefinite chill spheroidal graphite roll improves 1.5~2 times.
Embodiment
Be elaborated below in conjunction with the surface laser nanometer ceramic alloying processing method of specific embodiment to metallurgical cast iron roll provided by the invention.
Embodiment 1:
The surface laser nanometer ceramic alloying processing method of the metallurgical cast iron roll that present embodiment provides comprises the following step that carries out in order:
(1) pre-treatment is carried out with clean-out system commonly used in the surface of grain roll, to remove attached to its lip-deep greasy dirt and impurity;
(2) the nano ceramics alloy coating that will be made up of 12% nano-scale carbon, 13% wolfram varbide, 12% titanium oxide, 20% chromic oxide, 25% zirconium white and 18% aluminium sesquioxide and water glass liquid were with 1: 3 ratio uniform mixing, utilize the cold roller surface that is sprayed on the surface preparation of above-mentioned process of spray gun to form sprayed coating then, the thickness of sprayed coating is 0.5mm;
(3) adopt CO 2The cross-flow type laser apparatus is at 6 * 1mm 2The speed of hot spot, 700mm/min and the amount of lap condition of 1.0mm under above-mentioned sprayed coating is carried out Laser Alloying Treatment, to form alloy enhanced layer.
Embodiment 2:
The surface laser nanometer ceramic alloying processing method of the metallurgical cast iron roll that present embodiment provides comprises the following step that carries out in order:
(1) pre-treatment is carried out with clean-out system commonly used in the surface of grain roll, to remove attached to its lip-deep greasy dirt and impurity;
(2) the nano ceramics alloy coating that will be made up of 8% nano-scale carbon, 15% wolfram varbide, 14% titanium oxide, 16% chromic oxide, 28% zirconium white and 19% aluminium sesquioxide and water glass liquid were with 1: 3 ratio uniform mixing, utilize the cold roller surface that is sprayed on the surface preparation of above-mentioned process of spray gun to form sprayed coating then, the thickness of sprayed coating is 0.7mm;
(3) adopt CO 2The cross-flow type laser apparatus is at 6 * 1mm 2The speed of hot spot, 750mm/min and the amount of lap condition of 1.0mm under above-mentioned sprayed coating is carried out Laser Alloying Treatment, to form alloy enhanced layer.
Embodiment 3:
The surface laser nanometer ceramic alloying processing method of the metallurgical cast iron roll that present embodiment provides comprises the following step that carries out in order:
(1) pre-treatment is carried out with clean-out system commonly used in the surface of grain roll, to remove attached to its lip-deep greasy dirt and impurity;
(2) the nano ceramics alloy coating that will be made up of 11% nano-scale carbon, 11% wolfram varbide, 18% titanium oxide, 18% chromic oxide, 22% zirconium white and 20% aluminium sesquioxide and water glass liquid were with 1: 3 ratio uniform mixing, utilize the cold roller surface that is sprayed on the surface preparation of above-mentioned process of spray gun to form sprayed coating then, the thickness of sprayed coating is 1.0mm;
(3) adopt CO 2The cross-flow type laser apparatus is at 6 * 1mm 2The speed of hot spot, 800mm/min and the amount of lap condition of 1.0mm under above-mentioned sprayed coating is carried out Laser Alloying Treatment, to form alloy enhanced layer.

Claims (1)

1, a kind of surface laser nanometer ceramic alloying processing method of metallurgical cast iron roll, it comprises the following step that carries out in order:
(1) pre-treatment is carried out on the surface of grain roll, to remove attached to its lip-deep greasy dirt and impurity;
(2), utilize then that spray gun is cold to be sprayed on above-mentioned roller surface through surface preparation to form sprayed coating with nano ceramics alloy coating and water glass liquid ratio uniform mixing with 1: 3;
(3) adopt CO 2The cross-flow type laser apparatus is at 6 * 1mm 2The speed of hot spot, 700~800mm/min and the amount of lap condition of 1.0mm under above-mentioned sprayed coating is carried out Laser Alloying Treatment, to form alloy enhanced layer;
It is characterized in that: described nano ceramics alloy coating is the uniform mixture of 8~12% nano-scale carbons, 10~15% wolfram varbides, 12~18% titanium oxide, 16~20% chromic oxide, 20~30% zirconium whites and 18~20% aluminium sesquioxides.
CN200810053053A 2008-05-09 2008-05-09 Metallurgical cast iron roll surface laser nanometer ceramic alloying processing method Expired - Fee Related CN100595329C (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN200810053053A CN100595329C (en) 2008-05-09 2008-05-09 Metallurgical cast iron roll surface laser nanometer ceramic alloying processing method

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CN100595329C true CN100595329C (en) 2010-03-24

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Families Citing this family (11)

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Publication number Priority date Publication date Assignee Title
CN101748403A (en) * 2009-12-28 2010-06-23 天津大族烨峤激光技术有限公司 Composite strengthening method of anti-wear plate
CN101804509B (en) * 2010-04-14 2012-11-28 武汉武钢华工激光大型装备有限公司 Laser texturing technique of surface of roll
CN102350500A (en) * 2011-10-11 2012-02-15 贵州光谷海泰激光技术有限公司 Alloy powder for grain roll laser surface alloying and preparation method and application thereof
CN102797007A (en) * 2012-08-31 2012-11-28 安阳市睿恒数控机床有限公司 Method for forming film on roller surface through laser cladding
CN103060651B (en) * 2012-12-28 2015-03-04 鞍山煜宸科技有限公司 Nano ceramic alloy material for strengthening surface of ductile iron roller with laser and preparation method thereof
CN103938206B (en) * 2013-01-20 2015-12-23 江苏兆龙电气有限公司 Liquid zinc corrosion resistant sintering metal laser melting coating powder
CN103938207B (en) * 2013-01-20 2015-12-23 江苏兆龙电气有限公司 In the method for austenitic stainless steel surface laser cladding sintering metal powder
CN104532164B (en) * 2014-12-19 2016-10-26 芜湖金龙模具锻造有限责任公司 A kind of preparation method of modified form cold roll
CN104911529A (en) * 2015-05-09 2015-09-16 芜湖鼎恒材料技术有限公司 High-strength WC-ZrO2-Si nano-coating material and preparation method thereof
CN108642488B (en) * 2018-05-15 2020-10-20 中北大学 Preparation method of high-hardness wear-resistant coating on surface of titanium alloy substrate
CN108914042B (en) * 2018-07-06 2020-09-11 安徽大地熊新材料股份有限公司 Preparation method of wear-resistant and corrosion-resistant sintered neodymium-iron-boron magnet

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