CN105063313A - 40Cr steel bar quenched-tempered heat treatment method for quartz sand bar mill - Google Patents
40Cr steel bar quenched-tempered heat treatment method for quartz sand bar mill Download PDFInfo
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- CN105063313A CN105063313A CN201510436694.8A CN201510436694A CN105063313A CN 105063313 A CN105063313 A CN 105063313A CN 201510436694 A CN201510436694 A CN 201510436694A CN 105063313 A CN105063313 A CN 105063313A
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Abstract
The invention discloses a 40Cr steel bar quenched-tempered heat treatment method for a quartz sand bar mill. According to the method, bars are heated in an intermediate frequency furnace through a conventional method, blanks are prefabricated, and then forging forming, finishing and edge cutting are conducted on the bars; the edge-cut bars are stacked in a scattered mode and naturally cooled to 65 DEG C to be subjected to high-temperature tempering, the bars are heated to 800-850 DEG C at the heating speed of 300-400 DEG C/h for 40 min, and then the bars are air-cooled after being discharged out of the furnace. By means of the 40Cr steel bar quenched-tempered heat treatment method for the quartz sand bar mill, steel bars have good hardenability, and the surface hardness of products is greatly improved; meanwhile, roughness is improved, and therefore the wear resistance of the steel bars is improved. Accordingly, the service life of each steel bar is substantially prolonged.
Description
Technical field
The present invention relates to a kind of 40Cr steel rod tempering heat treating method for quartz sand rod mill.
Background technology
Along with the fast development of China's industry, all trades and professions are had higher requirement to energy-saving and cost-reducing.The raising production efficiency of production unit and the work-ing life of extension device are energy-saving and cost-reducing effective means.Heat treatment industry also at the potential of constantly employing new technology, novel process fully excavates material, extends its work-ing life, to reach energy-saving and cost-reducing object.
As a kind of conventional mine size reduction machinery, rod mill there has also been significant progress in recent years.Grinding medium-the frotton (rod iron) of the type machinery is the running stores of rod mill, and existing commercially conventional abrasion-proof manganese steel rod is primarily of steel mill's roll forming, and its mechanical property is not high, and abrasion resistant effect extreme difference, consumption is very big in use.The production cost that traditional rod iron produces due to abrasion is high, can not meet the growth requirement of industry, and the wear-resisting rod iron of development of new is imperative.
Summary of the invention
The technical problem to be solved in the present invention overcomes existing defect, provides a kind of 40Cr steel rod tempering heat treating method for quartz sand rod mill.
Object of the present invention carrys out specific implementation by the following technical programs:
A kind of 40Cr steel rod tempering heat treating method for quartz sand rod mill, conventional method is first adopted to carry out intermediate frequency heating, precast billet, forging and molding, finishing, trimming to bar, again the product after trimming to be scattered stacking, high tempering is carried out after Temperature fall to 65 DEG C, with the rate of heating of 300-400 DEG C/h, being heated to temperature is 800-850 DEG C, keeps 40min at this temperature, air cooling after coming out of the stove.
Beneficial effect of the present invention:
40Cr steel rod tempering heat treating method for quartz sand rod mill provided by the invention, namely the thermal treatment of a series of intermediate frequency surface tempering is carried out to raw material rod iron, in enforcement treating processes, by constantly putting into practice and the accumulation of experience, final realization controls the heat-up rate of material accurately, temperature, control a series of Key Scientific And Technical technique and the parameters such as the cooling change of thermal treatment part accurately, rod iron is finally made to have hardening capacity admirably, substantially increase the surface hardness of product, improve toughness simultaneously, thus improve the wear resistance of rod iron, make it to be greatly enhanced work-ing life.
Embodiment
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
embodiment 1:
A kind of 40Cr steel rod tempering heat treating method for quartz sand rod mill, conventional method is first adopted to carry out intermediate frequency heating, precast billet, forging and molding, finishing, trimming to bar, again the product after trimming to be scattered stacking, high tempering is carried out after Temperature fall to 65 DEG C, with the rate of heating of 300-400 DEG C/h, being heated to temperature is 800-850 DEG C, keeps 40min at this temperature, air cooling after coming out of the stove.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. the 40Cr steel rod tempering heat treating method for quartz sand rod mill, it is characterized in that: first adopt conventional method to carry out intermediate frequency heating, precast billet, forging and molding, finishing, trimming to bar, again the product after trimming to be scattered stacking, high tempering is carried out after Temperature fall to 65 DEG C, with the rate of heating of 300-400 DEG C/h, being heated to temperature is 800-850 DEG C, keeps 40min at this temperature, air cooling after coming out of the stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510436694.8A CN105063313A (en) | 2015-07-23 | 2015-07-23 | 40Cr steel bar quenched-tempered heat treatment method for quartz sand bar mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510436694.8A CN105063313A (en) | 2015-07-23 | 2015-07-23 | 40Cr steel bar quenched-tempered heat treatment method for quartz sand bar mill |
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| CN105063313A true CN105063313A (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510436694.8A Pending CN105063313A (en) | 2015-07-23 | 2015-07-23 | 40Cr steel bar quenched-tempered heat treatment method for quartz sand bar mill |
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| CN (1) | CN105063313A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0762430A (en) * | 1993-08-23 | 1995-03-07 | Sumitomo Metal Ind Ltd | Manufacture of wear resistant steel bar |
| CN101368275A (en) * | 2007-08-15 | 2009-02-18 | 沈阳鼓风机(集团)有限公司 | 42CrMoE thermal treatment technique |
| CN101775555A (en) * | 2010-03-18 | 2010-07-14 | 江阴南工锻造有限公司 | Forging alloy steel and manufacturing process thereof |
| CN101974676A (en) * | 2010-11-09 | 2011-02-16 | 诸城市义和车桥有限公司 | Breaking-preventing knuckle spindle and thermal treatment method thereof |
| CN103320581A (en) * | 2013-06-05 | 2013-09-25 | 衡阳市鹏润锻造有限公司 | High-hardenability quenched and tempered steel heat treatment method |
-
2015
- 2015-07-23 CN CN201510436694.8A patent/CN105063313A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0762430A (en) * | 1993-08-23 | 1995-03-07 | Sumitomo Metal Ind Ltd | Manufacture of wear resistant steel bar |
| CN101368275A (en) * | 2007-08-15 | 2009-02-18 | 沈阳鼓风机(集团)有限公司 | 42CrMoE thermal treatment technique |
| CN101775555A (en) * | 2010-03-18 | 2010-07-14 | 江阴南工锻造有限公司 | Forging alloy steel and manufacturing process thereof |
| CN101974676A (en) * | 2010-11-09 | 2011-02-16 | 诸城市义和车桥有限公司 | Breaking-preventing knuckle spindle and thermal treatment method thereof |
| CN103320581A (en) * | 2013-06-05 | 2013-09-25 | 衡阳市鹏润锻造有限公司 | High-hardenability quenched and tempered steel heat treatment method |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151118 |
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| RJ01 | Rejection of invention patent application after publication |