CN105177403A - Chromium-molybdenum-copper alloy rare earth casting grinding ball and preparation method thereof - Google Patents
Chromium-molybdenum-copper alloy rare earth casting grinding ball and preparation method thereof Download PDFInfo
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- CN105177403A CN105177403A CN201510325752.XA CN201510325752A CN105177403A CN 105177403 A CN105177403 A CN 105177403A CN 201510325752 A CN201510325752 A CN 201510325752A CN 105177403 A CN105177403 A CN 105177403A
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Abstract
The present invention relates to the technical field of wear resistance, and provides a chromium-molybdenum-copper alloy rare earth casting grinding ball and a preparation method thereof, wherein the chemical components comprise, by weight, 2.3-2.5% of C, 0.5-0.7% of Si, 10.2-10.6% of Cr, 0.1-0.2% of Mo, 0.1-0.2% of Cu, less than or equal to 0.05% of S, less than or equal to 0.03% of P, less than or equal to 0.1% of rare earth elements, and the balance of Fe, wherein the rare earth containing the rare earth elements is uniformly sprinkled on the melting liquid surface 13-15 min before casting after the materials containing the remaining elements are smelted. According to the present invention, the addition of the manganese element is eliminated, and the trace molybdenum and the trace copper are added to replace the manganese element, such that the residual austenite in the structure is substantially reduced while the strength, the hardness and the toughness of the wear resistance steel member are improved.
Description
Technical field
The present invention relates to wear-proof technique field, be specifically related to a kind of chromium molybdenum copper alloy rare earth cast abrading-ball and preparation method thereof.
Background technology
Ball mill is one of widely used Super-fine grinder machinery in industrial production.Ball mill steel ball is ball mill equipment grinding material medium, produces ablation, thus reduced further by the particle diameter of material by the collision friction between ball mill steel ball, between steel ball and material.In prior art, the mill Jie steel ball mainly ball milling such as chromium alloy, Mn series alloy steel casting or nodular cast iron part of ball mill, as high chromium steel ball, low-chrome steel ball, multicomponent alloy steel ball and vanadium-titanium-chromium alloy steel ball etc., its target mostly is cement, coal, ore, cinder etc.The coal pulverizer steel ball in use hardness of ball and wear resistance is one of principal element affecting coal pulverizer shaping effect.
Sweep in the too fast grinding machine of rotating speed such as raw material grinding mill, coal mill at some raw mills, wind, because wind speed in grinding machine is very fast, will soon be siphoned away by wind after material enters grinding machine, therefore the wear-resistant ball in grinding machine lacks material and slows down impact as bed course, clash into rear surface between steel ball mutually to organize and change, hardness sharply raises, and forms brittle failure and peels off.
For the problems referred to above, traditional way is in rich chromium cast iron, add appropriate Mn content, this way can improve the hardening capacity of wear-resistant ball in heat treatment process, but Mn violently can reduce Ms point, there is more residual austenite after rich chromium cast iron is quenched, if the rich chromium cast iron after Q-tempering is used for repetitive shock, then to wear and tear mining equipment to the fatigue impact of abrasive material, austenite during residual austenite more in addition easily uses, to martensitic phase transformation, causes fatigue flake.
Summary of the invention
(1) technical problem solved
For the deficiencies in the prior art, the invention provides a kind of chromium molybdenum copper alloy rare earth cast abrading-ball, relative to conventional art, this programme eliminates adding of manganese element, auxiliary adds Microamounts of Mo, copper substitutes, the problem that relieving fatigue peels off.
(2) technical scheme
For realizing above object, the present invention is achieved by the following technical programs:
A kind of chromium molybdenum copper alloy rare earth cast abrading-ball, it is characterized in that, its chemical composition comprises by weight percentage: C:2.3-2.5%, Si:0.5-0.7%, Cr:10.2-10.6%, Mo:0.1-0.2%, Cu:0.1-0.2%, S :≤0.05%, P :≤0.03%, rare earth :≤0.1%, remaining is Fe.
Preferably, chemical composition and the weight percent of described chromium molybdenum copper alloy rare earth cast abrading-ball are: C:2.3%, Si:0.5%, Cr:10.33%, Mo:0.1%, Cu:0.1%, S:0.01%, P :≤0.01%, and rare earth: 0.01%, remaining is Fe.
Preferably, chemical composition and the weight percent of described chromium molybdenum copper alloy rare earth cast abrading-ball are: C:2.4%, Si:0.6%, Cr:10.35%, Mo:0.15%, Cu:0.15%, S:0.03%, P :≤0.02%, and rare earth: 0.05%, remaining is Fe.
Preferably, chemical composition and the weight percent of described chromium molybdenum copper alloy rare earth cast abrading-ball are: C:2.5%, Si:0.7%, Cr:10.37%, Mo:0.2%, Cu:0.2%, S:0.05%, P :≤0.03%, and rare earth: 0.1%, remaining is Fe.
A preparation method for chromium molybdenum copper alloy rare earth cast abrading-ball, the rare earth containing described rare earth element pours into a mould evenly to apply at molten surface for first 13 ~ 15 minutes after the material melting containing all the other elements.
(3) beneficial effect
The invention provides a kind of chromium molybdenum copper alloy rare earth cast abrading-ball, relative to conventional art, this programme eliminates adding of manganese element, auxiliary add Microamounts of Mo, copper substitutes, greatly reduce the residual austenite in tissue, adopt rare earth to breed simultaneously, rare earth element has deoxidation, desulfurization, solid hydrogen, solid-solid diffusion in wear resisting steel iron material, non-uniform components, reduce finished product deviation, improve the pattern of inclusion metallic, distribute, impel the tiny of inclusion, the effect of refinement product examine, improve the intensity of wear-resisting steel part, hardness, toughness simultaneously.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
A kind of chromium molybdenum copper alloy rare earth cast abrading-ball, its chemical composition comprises by weight percentage: C:2.3-2.5%, Si:0.5-0.7%, Cr:10.2-10.6%, Mo:0.1-0.2%, Cu:0.1-0.2%, S :≤0.05%, P :≤0.03%, rare earth :≤0.1%, remaining is Fe, and the rare earth containing rare earth element pours into a mould evenly to apply at molten surface for first 13 ~ 15 minutes after the material melting containing all the other elements.
Embodiment 1:
The chemical composition of described chromium molybdenum copper alloy rare earth cast abrading-ball is by weight percentage: C:2.3%, Si:0.5%, Cr:10.33%, Mo:0.1%, Cu:0.1%, S:0.01%, P :≤0.01%, rare earth: 0.01%, and remaining is Fe.
Embodiment 2:
The chemical composition of described chromium molybdenum copper alloy rare earth cast abrading-ball is by weight percentage: C:2.4%, Si:0.6%, Cr:10.35%, Mo:0.15%, Cu:0.15%, S:0.03%, P :≤0.02%, rare earth: 0.05%, and remaining is Fe.
Embodiment 3:
The chemical composition of described chromium molybdenum copper alloy rare earth cast abrading-ball is by weight percentage: C:2.5%, Si:0.7%, Cr:10.37%, Mo:0.2%, Cu:0.2%, S:0.05%, P :≤0.03%, rare earth: 0.1%, and remaining is Fe.
Technical process of the present invention is: after starting electric furnace, add steel scrap and high carbon ferro-chrome, finally add molybdenum and copper, molten iron temperature is raised to 1600 DEG C-1650 DEG C, sampling send laboratory to detect, and reaches after standard come out of the stove until all elements, rare earth nucleating agent adds bottom molten iron storehouse, after molten iron storehouse poured into by molten iron, stir, iron liquid can fully be bred.After casting, take out foundry goods, to polish after being cooled to natural temperature dedusting, then thermal treatment is sent after detecting to outward appearance, thermal treatment process is 960 DEG C of+6h tempering, this programme eliminates adding of manganese element, auxiliary adds Microamounts of Mo, copper substitutes, greatly reduce the residual austenite in tissue, adopt rare earth to breed simultaneously, rare earth element has deoxidation in wear resisting steel iron material, desulfurization, Gu hydrogen, solid-solid diffusion, non-uniform components, reduce finished product deviation, improve the pattern of inclusion metallic, distribution, impel the tiny of inclusion, the effect of refinement product examine, improve the intensity of wear-resisting steel part simultaneously, hardness, toughness.
After said ratio and processing, wear-resistant ball core hardness is consistent with surface hardness, and mechanical property HRC reaches more than 538 degree, falling sphere times of fatigue >=20000 time, residual austenite :≤1.5%, impelling strength >=6.0J/cm2.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (5)
1. a chromium molybdenum copper alloy rare earth cast abrading-ball, it is characterized in that, its chemical composition comprises by weight percentage: C:2.3-2.5%, Si:0.5-0.7%, Cr:10.2-10.6%, Mo:0.1-0.2%, Cu:0.1-0.2%, S :≤0.05%, P :≤0.03%, rare earth element :≤0.1%, remaining is Fe.
2. chromium molybdenum copper alloy rare earth cast abrading-ball as claimed in claim 1, it is characterized in that, the chemical composition of described chromium molybdenum copper alloy rare earth cast abrading-ball is by weight percentage: C:2.3%, Si:0.5%, Cr:10.33%, Mo:0.1%, Cu:0.1%, S:0.01%, P :≤0.01%, rare earth element: 0.01%, remaining is Fe.
3. chromium molybdenum copper alloy rare earth cast abrading-ball as claimed in claim 1, it is characterized in that, the chemical composition of described chromium molybdenum copper alloy rare earth cast abrading-ball is by weight percentage: C:2.4%, Si:0.6%, Cr:10.35%, Mo:0.15%, Cu:0.15%, S:0.03%, P :≤0.02%, rare earth element: 0.05%, remaining is Fe.
4. chromium molybdenum copper alloy rare earth cast abrading-ball as claimed in claim 1, it is characterized in that, the chemical composition of described chromium molybdenum copper alloy rare earth cast abrading-ball is by weight percentage: C:2.5%, Si:0.7%, Cr:10.37%, Mo:0.2%, Cu:0.2%, S:0.05%, P :≤0.03%, rare earth element: 0.1%, remaining is Fe.
5. the preparation method of the chromium molybdenum copper alloy rare earth cast abrading-ball as described in claim 1,2,3 or 4, is characterized in that, the rare earth containing described rare earth element pours into a mould evenly to apply at molten surface for first 13 ~ 15 minutes after the material melting containing all the other elements.
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Citations (6)
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| CN101705435A (en) * | 2008-04-23 | 2010-05-12 | 安徽省凤形耐磨材料股份有限公司 | Production method of ultrahard high-chromium cast grinding ball |
| CN101851724A (en) * | 2010-04-15 | 2010-10-06 | 安徽省宁国诚信耐磨材料有限公司 | Phi-40-below sand casting high-wear-resistance grinding ball |
| CN101886212A (en) * | 2010-06-30 | 2010-11-17 | 安徽省宁国诚信耐磨材料有限公司 | Sand casting grinding ball and heat treatment process thereof |
| CN102676909A (en) * | 2012-03-14 | 2012-09-19 | 太原理工大学 | Method for manufacturing high-chrome cast iron grinding balls |
| CN104087815A (en) * | 2014-06-24 | 2014-10-08 | 宁国市正兴耐磨材料有限公司 | Wear-resistant ball for ball mill, and manufacturing method thereof |
| CN104561749A (en) * | 2013-10-25 | 2015-04-29 | 青岛和德隆机械有限公司 | Honeycomb type duplex metal composite hammer head casting technology |
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2015
- 2015-06-11 CN CN201510325752.XA patent/CN105177403A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101705435A (en) * | 2008-04-23 | 2010-05-12 | 安徽省凤形耐磨材料股份有限公司 | Production method of ultrahard high-chromium cast grinding ball |
| CN101851724A (en) * | 2010-04-15 | 2010-10-06 | 安徽省宁国诚信耐磨材料有限公司 | Phi-40-below sand casting high-wear-resistance grinding ball |
| CN101886212A (en) * | 2010-06-30 | 2010-11-17 | 安徽省宁国诚信耐磨材料有限公司 | Sand casting grinding ball and heat treatment process thereof |
| CN102676909A (en) * | 2012-03-14 | 2012-09-19 | 太原理工大学 | Method for manufacturing high-chrome cast iron grinding balls |
| CN104561749A (en) * | 2013-10-25 | 2015-04-29 | 青岛和德隆机械有限公司 | Honeycomb type duplex metal composite hammer head casting technology |
| CN104087815A (en) * | 2014-06-24 | 2014-10-08 | 宁国市正兴耐磨材料有限公司 | Wear-resistant ball for ball mill, and manufacturing method thereof |
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Application publication date: 20151223 |