CN103352110A - Processing technology of medium-wind-pressure percussion bit - Google Patents
Processing technology of medium-wind-pressure percussion bit Download PDFInfo
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- CN103352110A CN103352110A CN2013102438497A CN201310243849A CN103352110A CN 103352110 A CN103352110 A CN 103352110A CN 2013102438497 A CN2013102438497 A CN 2013102438497A CN 201310243849 A CN201310243849 A CN 201310243849A CN 103352110 A CN103352110 A CN 103352110A
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Abstract
A processing technology of a medium-wind-pressure percussion bit comprises processing and molding an annealed XGQ25 steel blank machine, heating to 810-830 DEG C in a propane protective-atmosphere furnace, keeping warm for 50-70 minutes, taking out of the furnace, putting in flow nitrogen or inert gases, quenching for three grades, and annealing in a low temperature of 260-220 DEG C. The processing technology is simple, convenient to operate, short in production flow and low in production cost; the prepared drill is good in mechanical property, can completely satisfy requirements of actual working conditions. The processing technology provided by the invention can replace present processing technologies of the medium-wind-pressure percussion bit, and thus is substantial in economic benefits and suitable for industrial production.
Description
Technical field
The invention discloses a kind of complete processing of Wind pressure percussion bit; Belong to Wind pressure drilling tool preparing technical field.
Background technology
The Wind pressure percussion bit refers to that wind pressure of work is the reciprocating drill drill bit of 12-15 handkerchief; I take charge of the material of producing this drill bit is XGQ25 steel (Cr:0.25, Ni:1.69, Mo:0.53, Mn:1.45, Si:1.39, V:0.21), and this material is the air quenching steel, and hardening capacity is good.At present, I take charge of the production technique of producing this drill bit and am:
1. normalizing: annealed state XGQ25 heating steel billet to 860 ℃ 4-6 hour air cooling of coming out of the stove of insulation.
2. high tempering: after the normalizing in 6-9 hour air cooling of coming out of the stove of 650 ℃-690 ℃ insulations.
3. machining moulding;
4. quench; 800 ℃ of insulations of Heating temperature 1 hour, oil cooling, cooling rate is 3 ℃/s approximately;
5. low-temperaturetempering: carries out low-temperaturetempering, tempering time 2-3 hour in 160-220 ℃ after quenching.
Because the hardening capacity of XGQ25 steel is good, starting material can effectively improve steel interior tissue, crystal grain thinning through after the normalizing; But after the normalizing, the hardness of material reaches HRC38-42, and hardness is higher, is not suitable for machining, therefore, must be through long high tempering, to reduce hardness, behind the high tempering, material hardness can be down to HRC25-30, can satisfy mach requirement.Machining is carried out later on oil quenching and is added low-temperaturetempering, obtains the good matrix that low carbon martensite adds a small amount of bainite (B approximately 20%), and its performance perameter sees Table one.
Above-mentioned technique can obtain good matrix and good comprehensive mechanical performance, well satisfies and uses needs, excellent property.But because the defective that process design exists, cause that Production Flow Chart is long, cost is high.Therefore, design that a kind of technique is simple, production cost is low, process after material matrix tissue and comprehensive mechanical performance good, the Wind pressure percussion bit production technique that satisfies the use needs becomes the demand of company.
Summary of the invention
The object of the invention is to overcome the deficiency of prior art and provide that a kind of processing method is simple, easy to operate, Production Flow Chart is short, cost is low, the drill bit comprehensive mechanical performance of preparation is good, the complete processing that satisfies the Wind pressure percussion bit of requirement of actual working condition.
The complete processing of a kind of Wind pressure percussion bit of the present invention comprises the steps:
The first step: machining
With annealed state XGQ25 steel wool base machining moulding, reach moulding product final design size;
Second step: quench
The moulding product that the first step is obtained is heated to 810-830 ℃ in the propane protective atmosphere, be incubated 50-70 minute, come out of the stove, place flowing gas minute three grades of quenchings, the processing parameter that the first step is quenched is: between 830 ℃-550 ℃ of the temperature, speed of cooling is controlled at 20-35 ℃/s; The processing parameter that quenches in the second stage is: between 550 ℃-350 ℃ of the temperature, speed of cooling is controlled at 10-20 ℃/s; The processing parameter that the third stage is quenched is: between the 350 ℃-room temperature of temperature, speed of cooling is controlled at 5-8 ℃/s;
The 3rd step, low-temperaturetempering
Moulding product after the second step quenching is carried out low-temperaturetempering, tempering time 2-3 hour in 160-220 ℃.
The complete processing of a kind of Wind pressure percussion bit of the present invention, described flowing gas is selected from nitrogen or rare gas element.
The present invention with annealed state XGQ25 steel wool base machining moulding, then carries out multistage quenching owing to adopting above-mentioned technique, the speed of cooling of quenching by controlling every one-level, the matched well of the realization final matrix of moulding product and performance.Change C curve figure change law according to thermal treatment, the high-temperature zone is cold soon, to avoid the nose of C curve, in order to avoid obtain non-quenching structure, therefore, the first step of temperature between 830 ℃-550 ℃ quenched, at 20-35 ℃/s, make matrix obtain non-perlite+ferritic structure by the control speed of cooling; Obtain the B tissue at middle warm area slow cooling, therefore interval at the BShi body transition temperature that quenches in 550 ℃-350 ℃ the second stage subsequently, the control speed of cooling is at 10-20 ℃/s, and making Cooling Austenite Transformation is the BShi body; Slow cooling obtains MShi body tissue between MShi body limited proportionality, reduce MShi body tissue stress, therefore, interval at the MShi body transition temperature that the third stage of 350 ℃-room temperature is quenched, the control speed of cooling is at 5-8 ℃/s, and making remaining Cooling Austenite Transformation is the MShi body, finally obtains the good matrix of BShi body+MShi body, wherein, the volume fraction of BShi body is 40%-50%.Through the Wind pressure percussion bit that processing method of the present invention is processed, its performance index part table 1.
Adopt preparation technology of the present invention, under the prerequisite of the good matrix that keeps Wind pressure percussion bit material XGQ25 steel and good comprehensive mechanical performance, effectively shortened the production cycle of Wind pressure percussion bit, foreshortened to about present 5 hours by original about 15 hours; Thereby significantly power cost saving and labour cost have been brought significant economic benefit.Calculate by every 1.5T/ stove, every stove is saved about 600 yuan of the normalizing electricity charge, about 500 yuan of the high tempering electricity charge, 400 yuan of labor wage.
In sum, processing method of the present invention is simple, easy to operate, Production Flow Chart is short, production cost is low, the drill bit comprehensive mechanical performance of preparation can satisfy the requirement of actual condition well, fully.Can replace existing Wind pressure percussion bit technique, remarkable in economical benefits is suitable for suitability for industrialized production.
Description of drawings
The Wind pressure percussion bit metallographic structure picture (X400) that accompanying drawing 1 is produced for prior art.
The Wind pressure percussion bit metallographic structure picture (X400) that accompanying drawing 2 is produced for the inventive method.
Can find out from accompanying drawing 1, the matrix that the Wind pressure percussion bit that prior art is produced obtains is that low carbon martensite adds a small amount of bainite (BShi body approximately 20%).
Can find out from accompanying drawing 2, the matrix that the Wind pressure percussion bit that adopts the present invention to produce obtains is BShi body+MShi body, and the volume fraction of BShi body is 40%-50%.
Embodiment
Embodiment 1
Produce the drill bit of Z102-R45 model, material is annealed state XGQ25 steel billet, and material composition is Cr:0.25, Ni:1.69, Mo:0.53, Mn:1.45, Si:1.39, V:0.21; After being machined into size, be heated to 810-815 ℃, be incubated 1 hour, workpiece temperature is come out of the stove at 815 ℃, places airtight quenching tank, and the molten long-pending of quenching tank is 1 cubic metre, the speed that passes into flowing nitrogen is 4 cubes m/hs, and it is 10 minutes that the actual measurement workpiece temperature is down to 550 ℃ of required times from 815 ℃, 20 ℃/s of work-piece cools speed; When workpiece temperature reached 550 ℃, the speed that passes into flowing nitrogen was 3.85 cubes m/hs, and it is 20 minutes that the actual measurement workpiece temperature is down to 350 ℃ of required times from 550 ℃, and work-piece cools speed is 10 ℃/s; When workpiece temperature reaches 350 ℃, the speed that passes into flowing nitrogen be 3.5 cubes of m/hs of actual measurement workpiece temperatures to be down to the room temperature required time from 350 ℃ be 40 minutes, work-piece cools speed is 5 ℃/s; Then, be heated to 160-170 ℃ and carry out low-temperaturetempering, tempering time 2-3 hour.The product that obtains after testing, performance index see Table 1.
Embodiment 2
Produce the drill bit of Z102-R45 model, material is annealed state XGQ25 steel billet, and material composition is Cr:0.25, Ni:1.69, Mo:0.53, Mn:1.45, Si:1.39, V:0.21; After being machined into size, be heated to 817-822 ℃, be incubated 1 hour, workpiece temperature is come out of the stove at 820 ℃, places airtight quenching tank, and the molten long-pending of quenching tank is 1 cubic metre, the speed that passes into flowing nitrogen is 4.5 cubes m/hs, and it is 8 minutes that the actual measurement workpiece temperature is down to 550 ℃ of required times from 820 ℃, and work-piece cools speed is 30 ℃/s; When workpiece temperature reached 550 ℃, the speed that passes into flowing nitrogen was 4.0 cubes m/hs, and it is 14 minutes that the actual measurement workpiece temperature is down to 350 ℃ of required times from 550 ℃, and work-piece cools speed is 15 ℃/s; When workpiece temperature reached 350 ℃, the speed that passes into flowing nitrogen was 3.8 cubes m/hs, and it is 30 minutes that the actual measurement workpiece temperature is down to the room temperature required time from 350 ℃, and work-piece cools speed is 7.5 ℃/s; Then, be heated to 160-170 ℃ and carry out low-temperaturetempering, tempering time 2-3 hour.The product that obtains after testing, performance index see Table 1.
Embodiment 3
Produce the drill bit of Z102-R45 model, material is annealed state XGQ25 steel billet, and material composition is Cr:0.25, Ni:1.69, Mo:0.53, Mn:1.45, Si:1.39, V:0.21; After being machined into size, be heated to 825-830 ℃, be incubated 1 hour, workpiece temperature is come out of the stove at 825 ℃, places airtight quenching tank, and the molten long-pending of quenching tank is 1 cubic metre, the speed that passes into flowing nitrogen is 4.8 cubes m/hs, and it is 6 minutes that the actual measurement workpiece temperature is down to 550 ℃ of required times from 825 ℃, and work-piece cools speed is 35 ℃/s; When workpiece temperature reached 550 ℃, the speed that passes into flowing nitrogen was 4.5 cubes m/hs, and it is 12 minutes that the actual measurement workpiece temperature is down to 350 ℃ of required times from 550 ℃, and work-piece cools speed is 18 ℃/s; When workpiece temperature reached 350 ℃, the speed that passes into flowing nitrogen was 4 cubes m/hs, and it is 25 minutes that the actual measurement workpiece temperature is down to the room temperature required time from 350 ℃, and work-piece cools speed is 8 ℃/s; Then, be heated to 160-170 ℃ and carry out low-temperaturetempering, tempering time 2-3 hour.The product that obtains after testing, performance index see Table 1.
The bit performance index contrast table of table one: embodiment and prior art preparation
The detected result that obtains from embodiment 1-3 as can be known, adopt the drill bit of technique preparation of the present invention, comprehensive mechanical performance has all reached the performance index requirement of the rear material of prior art processing, but, adopt processing method of the present invention can significantly shorten the production cycle, reduce production costs, the drill bit comprehensive mechanical of preparation can satisfy the requirement of actual condition fully.Can replace existing Wind pressure percussion bit technique, remarkable in economical benefits is suitable for industrial applications.
Claims (3)
1. the complete processing of a Wind pressure percussion bit comprises the steps:
The first step: machining
With annealed state XGQ25 steel wool base machining moulding, reach moulding product final design size;
Second step: quench
The moulding product that the first step is obtained is heated to 810-830 ℃ in the propane special atmosphere oven, be incubated 50-70 minute, comes out of the stove, and places flowing gas minute three grades of quenchings;
The 3rd step, low-temperaturetempering
Moulding product after the second step quenching is carried out low-temperaturetempering, tempering time 2-3 hour in 160-220 ℃.
2. the complete processing of a kind of Wind pressure percussion bit according to claim 1, it is characterized in that: the processing parameter of three grades of quenchings is: the processing parameter that the first step is quenched is: between 830 ℃-550 ℃ of the temperature, speed of cooling is controlled at 20-35 ℃/s; The processing parameter that quenches in the second stage is: between 550 ℃-350 ℃ of the temperature, speed of cooling is controlled at 10-20 ℃/s; The processing parameter that the third stage is quenched is: between the 350 ℃-room temperature of temperature, speed of cooling is controlled at 5-8 ℃/s.
3. the complete processing of a kind of Wind pressure percussion bit according to claim 2, it is characterized in that: described flowing gas is selected from nitrogen or rare gas element.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209720A (en) * | 2014-09-19 | 2014-12-17 | 马鞍山邦斯科自动化科技有限公司 | Manufacturing method of heat-resistant rock drill bit |
| CN104481409A (en) * | 2014-09-19 | 2015-04-01 | 马鞍山邦斯科自动化科技有限公司 | Manufacturing method of rock drill |
| CN105063320A (en) * | 2015-09-21 | 2015-11-18 | 长沙天和钻具机械有限公司 | Method for preparing high air pressure impactor piston |
| CN105219928A (en) * | 2015-09-28 | 2016-01-06 | 安庆市华骐机械配件有限公司 | A kind of high strength corrosion resistant mine drill preparation method |
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| CN102703911A (en) * | 2012-06-29 | 2012-10-03 | 长沙黑金刚实业有限公司 | Heat treatment method for down-the-hole drill bit of high-wind pressure drilling tool, and drill bit |
| CN103132087A (en) * | 2013-03-20 | 2013-06-05 | 北京科技大学 | Technology for controlling hardness distribution of material for 23CrNi3Mo drill tool |
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| 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 |
| WO1999005328A1 (en) * | 1997-07-28 | 1999-02-04 | Exxonmobil Upstream Research Company | Method for producing ultra-high strength, weldable steels with superior toughness |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209720A (en) * | 2014-09-19 | 2014-12-17 | 马鞍山邦斯科自动化科技有限公司 | Manufacturing method of heat-resistant rock drill bit |
| CN104481409A (en) * | 2014-09-19 | 2015-04-01 | 马鞍山邦斯科自动化科技有限公司 | Manufacturing method of rock drill |
| CN105063320A (en) * | 2015-09-21 | 2015-11-18 | 长沙天和钻具机械有限公司 | Method for preparing high air pressure impactor piston |
| CN105063320B (en) * | 2015-09-21 | 2017-06-16 | 长沙天和钻具机械有限公司 | A kind of preparation method of high-wind pressure impactor piston |
| CN105219928A (en) * | 2015-09-28 | 2016-01-06 | 安庆市华骐机械配件有限公司 | A kind of high strength corrosion resistant mine drill preparation method |
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Denomination of invention: Processing technology of medium-wind-pressure percussion bit Effective date of registration: 20190604 Granted publication date: 20140827 Pledgee: Jinzhou Branch of Hunan Ningxiang Rural Commercial Bank Co., Ltd. Pledgor: Changsha Tianhe Drilling Tools and Machinery Co., Ltd. Registration number: 2019330000139 |
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Date of cancellation: 20200715 Granted publication date: 20140827 Pledgee: Jinzhou Branch of Hunan Ningxiang Rural Commercial Bank Co.,Ltd. Pledgor: CHANGSHA TIANHE DRILLING TOOLS AND MACHINERY Co.,Ltd. Registration number: 2019330000139 |