CN101805823A - Heat treatment process for mining cone bit friction pair - Google Patents
Heat treatment process for mining cone bit friction pair Download PDFInfo
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- CN101805823A CN101805823A CN 201010134648 CN201010134648A CN101805823A CN 101805823 A CN101805823 A CN 101805823A CN 201010134648 CN201010134648 CN 201010134648 CN 201010134648 A CN201010134648 A CN 201010134648A CN 101805823 A CN101805823 A CN 101805823A
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Abstract
The invention relates to a heat treatment process for a mining cone bit friction pair, and solves the problem that products produced according to technical parameters related to the present domestic conventional heat treatment process have very short service life caused by abrasion. The heat treatment process for the mining cone bit friction pair is characterized by determining reasonable quenching and tempering temperatures of a cone and a jaw and related parameters such as a carburzing temperature, carbon concentration of a carburized layer and the like and combining hardness of parts and the parts of the mining cone bit friction pair, strength near a surface layer and surface smoothness to the optimum. Particularly, the heat treatment process for the mining cone bit friction pair achieves the stability and the reliability of the mining cone bit friction pair, guarantees the optimum combination of all of the parameters instead of an optimum state of each single parameter, guarantees the stable and reliable obtainment of the technical parameters instead of the optimum technical parameters, and can be widely applied to surface mining enterprises.
Description
One, technical field
The invention belongs to the manufacturing technology of mine excavation equipment, relate in particular to a kind of thermal treatment process of mining cone bit motor pair.
Two, background technology
The friction pair thermal treatment process of present domestic mining cone bit manufacturing firm mainly is: the thermal treatment of tooth pawl, gear wheel: forging blank machining---carburizing---machining------tempering---machining of quenching; The thermal treatment process of the thermal treatment process of roller and ball and gear wheel, tooth pawl is similar substantially.Though these thermal treatment process are routine and just look at like sophisticated technology, but not only the life-span of domestic mining cone bit friction pair is well below the life-span of external mining cone bit friction pair, and the friction pair life-span of domestic different manufacturing firms also differ greatly, What is more, and the fluctuation range in the life-span of the drill bit friction pair of same producer manufacturing is quite big.Use factors such as varying environment even considered steel smelting quality and drill bit, still can clearly see this tendency.
Three, summary of the invention
The objective of the invention is: clearly all heat treatment parameters are to the influence mode and the influence degree in friction pair life-span, find out the main heat treatment parameter and the heat treatment parameter the most rambunctious that influence the friction pair life-span, determine emphasis controlling unit, form concrete, serial, a thermal treatment process targetedly that is enclosed within conventional thermal treatment framework under each heat treatment parameter.
The technical solution used in the present invention is: because the quenching temperature of gear wheel, tooth pawl is the main heat treatment parameter that influences the friction pair life-span, it is heat treatment parameter the most rambunctious that the carburizing of gear wheel, tooth pawl has related parameter, and gear wheel, tooth the pawl target setting of cementation zone carbon concentration separately are most important parameters.Therefore, the carburization process of production tooth pawl is: ooze 900 ℃～950 ℃ of temperature by force, 880 ℃～920 ℃ of diffusion temperatures; Ooze by force and decide on the depth of penetration requirement diffusion time, final surface carbon concentration is controlled at 0.85%～1.05%, and depth of penetration is 2.5mm～3.0mm; 800 ℃～830 ℃ of quenching temperatures, decide on the workpiece size size heat-up time; Quenchant is a K oil; 180 ℃～200 ℃ of tempering temperatures, tempering time is decided on the workpiece size size.The surface hardness of Huo Deing is HRC58-64 at last; The carburization process of producing gear wheel is: ooze 900 ℃～950 ℃ of temperature by force, 880 ℃～920 ℃ of diffusion temperatures; Ooze by force and decide on the depth of penetration requirement diffusion time, final surface carbon concentration is controlled at 0.70%～0.90%, and depth of penetration is 2.0mm～2.5mm; 830 ℃～870 ℃ of quenching temperatures, decide on the workpiece size size heat-up time; Quenchant is a K oil; 180 ℃-200 ℃ of tempering temperatures, tempering time is decided on the workpiece size size.The surface hardness of Huo Deing is HRC55-60 at last; Simultaneously, the relevant process factors of material hot treatment such as the roller in the friction pair, ball and relative thrust surface supporting adaptation or adjustment have been carried out.Make finally that Hardness Distribution, metallographic structure situation etc. reach the controlled target of setting in surface hardness, surface smoothness, rigidity layer total depth, the effective working lining of friction of each component of friction pair of mining cone bit, and make the acquisition of target setting state keep stable.Fluctuation range is within controlling index.
Beneficial effect of the present invention is: by carburizing, the setting of quenching and tempering process, make the ore deposit that Hardness Match between each component of friction pair of tooth-wheel bit be arranged, the smooth finish coupling, rigidity layer total depth coupling, the interior Hardness Distribution coupling of effective working lining that rubs, metallographic structure situation coupling etc. reaches the mated condition of setting, and make the acquisition of setting mated condition keep stable, the life-span of product is greatly enhanced, but also improved mine excavation efficient greatly, reduce cost of mining, reduced working strength of workers, significantly improved Working environment, for enterprise brings abundant economic benefit.
The invention will be further described below in conjunction with accompanying drawing:
Four, description of drawings
Fig. 1 is a carburization process graphic representation of the present invention;
Fig. 2 is a quenching technology graphic representation of the present invention.
Five, embodiment
Owing to determined that the quenching temperature of gear wheel, tooth pawl is the main heat treatment parameter that influences the friction pair life-span, it is heat treatment parameter the most rambunctious that the carburizing of having determined gear wheel, tooth pawl has related parameter, by a large amount of serial experiments then find gear wheel, tooth pawl separately the target setting of cementation zone carbon concentration be most important parameters.Therefore:
The tooth pawl made from employing 20CrNiMo material is an example, and carburization process is: ooze 930 ℃ of temperature by force, 900 ℃ of diffusion temperatures; Ooze by force and decide on the depth of penetration requirement diffusion time, final surface carbon concentration is controlled at 0.85%～1.05%, and depth of penetration is 2.5mm～3.0mm.815 ℃ of quenching temperatures, decide on the workpiece size size heat-up time, and quenchant is a K oil.190 ℃ of tempering temperatures, tempering time is decided on the workpiece size size.The surface hardness of Huo Deing is HRC58-64 at last.
To adopt 15MnNi
4The gear wheel that the Mo material is made is an example, and carburization process is: ooze 930 ℃ of temperature by force, 900 ℃ of diffusion temperatures; Ooze by force and decide on the depth of penetration requirement diffusion time, final surface carbon concentration is controlled at 0.70%～0.90%, and depth of penetration is 2.0mm～2.5mm.850 ℃ of quenching temperatures, decide on the workpiece size size heat-up time, and quenchant is a K oil.200 ℃ of tempering temperatures, tempering time is decided on the workpiece size size.The surface hardness of Huo Deing is HRC55-60 at last.
Process curve as shown in Figure 1 and Figure 2 is the representative processes curve.For the differing materials trade mark, need adjust accordingly.For containing Cr is the master alloying structure iron, can suitably reduce quenching temperature; And for containing the structural alloy steel that Ni is the master, quenching temperature can suitably raise; Be controlled at the high workpiece of limitting for surface carbon concentration, can suitably reduce quenching temperature; Be controlled at the workpiece of the lowest limit for surface carbon concentration, quenching temperature can suitably raise.Simultaneously, in definite thermal treatment process, when setting the processing parameter controlled target, not only to pay attention to workpiece surface hardness and metallographic structure situation, also to pay attention to hardness, intensity and the metallographic structure situation of workpiece substrate, under certain conditions, more to pay attention to hardness, intensity and the metallographic structure situation of workpiece substrate.Wherein, the heating-up time, carburizing was oozed the time by force according to differing materials, different concns requirement adjustment according to the batch adjustment, and also require to adjust according to differing materials, different concns diffusion time; Note coming out of the stove oxidation protection; Quench and note oxidation protection between heating period; Notice during quench cooled that coolant temperature is even; Tempering requires in time.During this time, carry out carbon potential detection in the necessary cementing furnace, carry out the depth of penetration coupon on request and detect; Check the metallographic structure of metallographic coupon on request; Detect coupon hardness; In case of necessity, check mechanical property.
Relevant processing requirements of material hot treatment such as the roller in the friction pair, ball and relative thrust surface and tooth cat's paw take turns basic identical, pertinency factor is carried out supporting adaptation or adjustment, Hardness Distribution, metallographic structure situation etc. reach the controlled target of setting in surface hardness, surface smoothness, rigidity layer total depth, the effective working lining of friction of each component of friction pair of mining cone bit thereby make, and make the acquisition of target setting state keep stable.Fluctuation range is within controlling index.
Simultaneously, in machining process, make stock removal, rotating speed adapt to the workpiece of different surfaces hardness, select quality lubricant, adopt suitable related measures such as assembly technology, make to set and is kept and further lifting with the hardness of the friction pair that reaches and near frictional coefficient, the surface of friction mechanical property.The mining cone bit that the present invention produces, a large amount of test in places through the mine, the boring total footage has significantly and increases.Improved mine excavation efficient greatly, reduced cost of mining, reduced working strength of workers, significantly improved Working environment, for drill produced producer obtains remarkable economic efficiency.
Claims (1)
1. the thermal treatment process of a mining cone bit friction pair, operational path is forging blank machining-carburizing-machining-quenching-tempering-machining, it is characterized in that: carburization process ooze by force and decide on carburized depth diffusion time, the quenching and tempering time decides on workpiece size size; Its concrete processing parameter is:
(1) tooth pawl thermal treatment process
A, carburization process ooze 900 ℃～950 ℃ of temperature, 880 ℃～920 ℃ of diffusion temperatures by force; Ooze by force and decide on the depth of penetration requirement diffusion time, final surface carbon concentration is controlled at 0.85%～1.05%, and depth of penetration is 2.5mm～3.0mm;
800 ℃～830 ℃ of b, quenching temperatures, decide on the workpiece size size heat-up time; Quenchant is a K oil;
180 ℃～200 ℃ of c, tempering temperatures, tempering time is decided on the workpiece size size, and the surface hardness of Huo Deing is HRC58-64 at last;
(2) gear wheel thermal treatment process
A, carburization process ooze 900 ℃～950 ℃ of temperature, 880 ℃～920 ℃ of diffusion temperatures by force; Ooze by force and decide on the depth of penetration requirement diffusion time, final surface carbon concentration is controlled at 0.70%～0.90%, and depth of penetration is 2.0mm～2.5mm;
830 ℃～870 ℃ of b, quenching temperatures, decide on the workpiece size size heat-up time; Quenchant is a K oil;
180 ℃～200 ℃ of c, tempering temperatures, tempering time is decided on the workpiece size size.The surface hardness of Huo Deing is HRC55-60 at last.
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| CN 201010134648 CN101805823A (en) | 2010-03-26 | 2010-03-26 | Heat treatment process for mining cone bit friction pair |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383136A (en) * | 2011-11-17 | 2012-03-21 | 江西电力职业技术学院 | Heat treatment process for steel of transmission line tower |
| CN102676942A (en) * | 2012-05-08 | 2012-09-19 | 无锡宏达热处理锻造有限公司 | Thermal processing technology for petroleum drilling tool material |
| CN103453021A (en) * | 2013-09-13 | 2013-12-18 | 西南石油大学 | Textured roller bit sliding bearing and test method of unit tribological property of texture roller bit sliding bearing |
| CN106676463A (en) * | 2017-03-03 | 2017-05-17 | 中国矿业大学 | Surface deep strengthening method with graphitizing micro-nano carbon material as diffusion source |
| CN107262646A (en) * | 2017-07-07 | 2017-10-20 | 湖北鸣利来冶金机械股份有限公司 | A kind of open die forging upsetting elongation of palm of roller bits and closed die forging forming method |
| CN107400765A (en) * | 2017-07-07 | 2017-11-28 | 湖北鸣利来冶金机械股份有限公司 | The non-metallic inclusion high temperature passivation Technology for Heating Processing of palm of roller bits blank |
| CN109366105A (en) * | 2018-11-27 | 2019-02-22 | 胡敏 | A kind of mine gear wheel method of processing parts |
| CN110863098A (en) * | 2019-10-23 | 2020-03-06 | 武钢中冶工业技术服务有限公司 | Heat treatment method for roller of 55SiMoV material mining roller bit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046196A (en) * | 1989-09-13 | 1990-10-17 | 国营长安机器制造厂 | The quick thermal treatment process of tooth palm of drill toothed wheel |
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2010
- 2010-03-26 CN CN 201010134648 patent/CN101805823A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046196A (en) * | 1989-09-13 | 1990-10-17 | 国营长安机器制造厂 | The quick thermal treatment process of tooth palm of drill toothed wheel |
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| 《凿岩机械气动工具》 20071231 徐君峰 三牙轮钻头选用材料的对比分析 59-61 1 , 第2期 * |
| 《矿山机械》 20091231 从善海 矿用牙轮钻头55SiMoV滚柱的热处理及耐磨性能 10-13 1 第37卷, 第23期 * |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383136A (en) * | 2011-11-17 | 2012-03-21 | 江西电力职业技术学院 | Heat treatment process for steel of transmission line tower |
| CN102383136B (en) * | 2011-11-17 | 2015-05-06 | 国家电网公司 | Heat treatment process for steel of transmission line tower |
| CN102676942A (en) * | 2012-05-08 | 2012-09-19 | 无锡宏达热处理锻造有限公司 | Thermal processing technology for petroleum drilling tool material |
| CN102676942B (en) * | 2012-05-08 | 2014-01-15 | 无锡宏达热处理锻造有限公司 | Thermal processing technology for petroleum drilling tool material |
| CN103453021A (en) * | 2013-09-13 | 2013-12-18 | 西南石油大学 | Textured roller bit sliding bearing and test method of unit tribological property of texture roller bit sliding bearing |
| CN103453021B (en) * | 2013-09-13 | 2015-12-09 | 西南石油大学 | Texturing rock bit bearing and unit tribological property test method |
| CN106676463A (en) * | 2017-03-03 | 2017-05-17 | 中国矿业大学 | Surface deep strengthening method with graphitizing micro-nano carbon material as diffusion source |
| CN107262646A (en) * | 2017-07-07 | 2017-10-20 | 湖北鸣利来冶金机械股份有限公司 | A kind of open die forging upsetting elongation of palm of roller bits and closed die forging forming method |
| CN107400765A (en) * | 2017-07-07 | 2017-11-28 | 湖北鸣利来冶金机械股份有限公司 | The non-metallic inclusion high temperature passivation Technology for Heating Processing of palm of roller bits blank |
| CN109366105A (en) * | 2018-11-27 | 2019-02-22 | 胡敏 | A kind of mine gear wheel method of processing parts |
| CN110863098A (en) * | 2019-10-23 | 2020-03-06 | 武钢中冶工业技术服务有限公司 | Heat treatment method for roller of 55SiMoV material mining roller bit |
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Open date: 20100818 |