CN107164613A - A kind of shank of rock drill heat treatment method - Google Patents
A kind of shank of rock drill heat treatment method Download PDFInfo
- Publication number
- CN107164613A CN107164613A CN201710338692.4A CN201710338692A CN107164613A CN 107164613 A CN107164613 A CN 107164613A CN 201710338692 A CN201710338692 A CN 201710338692A CN 107164613 A CN107164613 A CN 107164613A
- Authority
- CN
- China
- Prior art keywords
- bit shank
- shank
- hours
- degrees celsius
- heat treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
- C23C8/22—Carburising of ferrous surfaces
Abstract
The invention discloses a kind of shank of rock drill heat treatment method, comprise the following steps：Carburizing direct quenching, high tempering, quench, be not tempered again, normal temperature cooling.The key technical index such as fatigue strength, anti-wear performance, case hardness, impact flexibility for significantly improving bit shank using the available beneficial effect of technical scheme, thus avoid bit shank in use easy output bit shank fracture, damaged tail end face, thread abrasion and fracture, the defect that fatigue life is short；Compared with prior art, the bit shank handled using technical solution of the present invention, hence it is evident that improve the key technical index such as anti-crack ability, fatigue life, anti-wear performance, the case hardness of bit shank, average life span is original 6 times to 8 times.
Description
Technical field
The present invention relates to the Surface heat-treatent field of metal bit shank, and in particular to a kind of shank of rock drill heat treatment method.
Background technology
With the development of China's steel and iron industry, iron notch drill is widely used in steel plant.Rock drill is out
The core component of iron mouthful machine, short with opening time, reliability is high, percussion power and drilling torque is big, working service is convenient
Feature.Bit shank as rock drill critical piece operationally, its tail end face directly bears the big work(of high frequency of rock drill piston
Rate Contact -impact, drill steel and bore bit are delivered to by the ballistic work of piston movement from bit shank tail end, so as to carry out blast furnace opening operation.
Rock drill high-frequency percussion and strength torsion are directly born because bit shank is main in the course of the work, therefore is whole chisel
One of main consumable part of rock machine, service life is shorter.Bit shank failure mode be mainly bit shank fracture, tail end face it is damaged,
Several failure modes such as thread abrasion.To improve the service life of bit shank, bit shank need to be heat-treated.In the prior art to pricker
Tail Technology for Heating Processing is usually to carry out carburizing direct quenching processing to bit shank first, is 920 degrees Celsius, carbon activity in in-furnace temperature
Concentration is to carry out 2 hours strong under 1.1% process conditions to ooze, and is then carried out 4 hours in the case where carbon activity concentration is 0.8% process conditions
To the diffusion process of 6 hours, diffusion process terminated, and was 820 degrees Celsius in in-furnace temperature, carbon activity concentration is 0.8% process conditions
Under, oil quenchinng 30 minutes is carried out, the process that bit shank austenite structure is changed into martensitic structure is completed, last in-furnace temperature is
160-250 degrees Celsius of 2 hours air coolings of lonneal are come out of the stove, and obtain tempered martensite, and hardness is about HRC53 to HRC55.
But bit shank is carried out after Surface heat-treatent using prior art, bit shank in actual use, effect or undesirable, easily
There is bit shank fracture, tail end face is damaged, thread abrasion and fracture, the defect that fatigue life is short.
The content of the invention
For above-mentioned the deficiencies in the prior art, present invention solves the technical problem that being how to solve bit shank in use
Easily there is bit shank fracture, tail end face breakage, thread abrasion, fatigue life short defect.
For above-mentioned technical problem, technical scheme proposed by the present invention is a kind of shank of rock drill heat treatment method, including
Following steps：
(1) carburizing direct quenching：In-furnace temperature be 920-940 degrees Celsius, carbon activity concentration for 1.1% process conditions under, enter
The row strong carburizing of 2-3 hours, then in the case where carbon activity concentration is 0.8% process conditions, carries out the carbon spread of 4 hours to 6 hours
Process, carbon spread process terminates, in-furnace temperature be 820-840 degrees Celsius, carbon activity concentration for 0.8% process conditions under, enter
Row oil quenchinng 30-40 minutes, completes the process that bit shank is changed into martensitic structure by austenite structure；
(2) high tempering：It is 550-650 degrees Celsius in in-furnace temperature, is passed through nitrogen as protection, it is empty after carrying out tempering 2 hours
Cold to come out of the stove, bit shank center portion obtains tempered sorbite tissue, while carbide precipitate is simultaneously from martensite and retained austenite for infiltration layer
Eliminate micro-flaw；
(3) quench again；It it is 850 degrees Celsius in in-furnace temperature, carbon activity concentration is under 0.8% process conditions, progress quenches 1.5
Hour, retained austenite quantity is reduced, martensite transformation temperature is increased, makes part Transformation of Retained Austenite geneva
Body, while also obtaining part bainite structure, the case hardness finally given is HRC 60 to HRC 62；
(4) it is not tempered, normal temperature cooling.Bit shank to completing again quenching process, no longer carries out conventional tempering process, bit shank is come out of the stove
Whole processes of heat treatment are completed after being cooled down afterwards in normal temperature air.
The present invention is applied to the heat treatment of all size model bit shank.
It is to significantly improve fatigue life of bit shank, anti-wear performance, table using the available beneficial effect of technical scheme
The key technical index such as surface hardness, thus avoid bit shank in use the fracture of easy output bit shank, tail end face it is damaged,
Thread abrasion and fracture, the defect that fatigue life is short；Compared with prior art, the bit shank handled using technical solution of the present invention,
The key technical index such as anti-crack ability, fatigue life, anti-wear performance, the case hardness of bit shank are significantly improved, average life span is
Originally 6 times to 8 times.
Brief description of the drawings
Fig. 1 is present invention process flow chart.
Embodiment
In order that technical problem solved by the invention, technical scheme and beneficial effect are more clearly understood, below in conjunction with
The present invention will be described in further detail for accompanying drawing, is not intended to limit the present invention.
Fig. 1 shows the technological process of the present invention, and a kind of shank of rock drill heat treatment method comprises the following steps：
(1) carburizing direct quenching：In-furnace temperature be 920-940 degrees Celsius, carbon activity concentration for 1.1% process conditions under, enter
The row strong carburizing of 2-3 hours, then in the case where carbon activity concentration is 0.8% process conditions, carries out the carbon spread of 4 hours to 6 hours
Process, carbon spread process terminates, in-furnace temperature be 820-840 degrees Celsius, carbon activity concentration for 0.8% process conditions under, enter
Row oil quenchinng 30-40 minutes, completes the process that bit shank is changed into martensitic structure by austenite structure；
(2) high tempering：It is 550-650 degrees Celsius in in-furnace temperature, is passed through nitrogen as protection, it is empty after carrying out tempering 2 hours
Cold to come out of the stove, bit shank center portion obtains tempered sorbite tissue, while carbide precipitate is simultaneously from martensite and retained austenite for infiltration layer
Eliminate micro-flaw；
(3) quench again；It it is 850 degrees Celsius in in-furnace temperature, carbon activity concentration is small to carry out quenching 1.5 under 0.8% process conditions
When, retained austenite quantity is reduced, martensite transformation temperature is increased, makes part Transformation of Retained Austenite martensite,
Part bainite structure is also obtained simultaneously, the case hardness finally given is HRC 60 to HRC 62；
(4) it is not tempered, normal temperature cooling.Bit shank to completing again quenching process, no longer carries out conventional tempering process, bit shank is come out of the stove
Whole processes of heat treatment are completed after being cooled down afterwards in normal temperature air.
It is fatigue life, the wearability for significantly improving bit shank using the available beneficial effect of technical scheme
The key technical index such as energy, case hardness, so as to avoid bit shank easy output bit shank fracture, tail end face in use
Damaged, thread abrasion thread abrasion and fracture, the defect that fatigue life is short；Compared with prior art, using the technology of the present invention side
The bit shank of case processing, hence it is evident that improve the key technologies such as anti-crack ability, fatigue life, anti-wear performance, the case hardness of bit shank and refer to
Mark, average life span is original 6 times to 8 times.
Embodiments of the present invention are described in detail above in association with accompanying drawing, but the present invention be not limited to it is described
Embodiment.For a person skilled in the art, without departing from the principles and spirit of the present invention to these realities
The mode of applying carries out a variety of change, modification, replacement and modification and still fallen within the scope of the present invention.
Claims (1)
1. a kind of shank of rock drill heat treatment method, it is characterised in that：Comprise the following steps：
(1) carburizing direct quenching：In-furnace temperature be 920-940 degrees Celsius, carbon activity concentration for 1.1% process conditions under, enter
The row strong carburizing of 2-3 hours, then in the case where carbon activity concentration is 0.8% process conditions, carries out the carbon spread of 4 hours to 6 hours
Process, carbon spread process terminates, in-furnace temperature be 820-840 degrees Celsius, carbon activity concentration for 0.8% process conditions under, enter
Row oil quenchinng 30-40 minutes, completes the process that bit shank is changed into martensitic structure by austenite structure；
(2) high tempering：It is 550-650 degrees Celsius in in-furnace temperature, is passed through nitrogen as protection, it is empty after carrying out tempering 2 hours
Cold to come out of the stove, bit shank center portion obtains tempered sorbite tissue, while carbide precipitate is simultaneously from martensite and retained austenite for infiltration layer
Eliminate micro-flaw；
(3) quench again；It it is 850 degrees Celsius in in-furnace temperature, carbon activity concentration is under 0.8% process conditions, progress quenches 1.5
Hour, retained austenite quantity is reduced, martensite transformation temperature is increased, makes part Transformation of Retained Austenite geneva
Body, while also obtaining part bainite structure, the case hardness finally given is HRC 60 to HRC 62；
(4) it is not tempered, normal temperature cooling；Bit shank to completing again quenching process, no longer carries out conventional tempering process, bit shank is come out of the stove
Whole processes of heat treatment are completed after being cooled down afterwards in normal temperature air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338692.4A CN107164613A (en) | 2017-05-15 | 2017-05-15 | A kind of shank of rock drill heat treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338692.4A CN107164613A (en) | 2017-05-15 | 2017-05-15 | A kind of shank of rock drill heat treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107164613A true CN107164613A (en) | 2017-09-15 |
Family
ID=59816027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710338692.4A Pending CN107164613A (en) | 2017-05-15 | 2017-05-15 | A kind of shank of rock drill heat treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107164613A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102776520A (en) * | 2012-08-03 | 2012-11-14 | 西北矿冶研究院 | Heat treatment process for shank of rock drill |
| CN104562048A (en) * | 2014-10-17 | 2015-04-29 | 芜湖扬宇机电技术开发有限公司 | Heat treatment process for En40B type rock drilling tool shank |
| CN105821371A (en) * | 2016-04-06 | 2016-08-03 | 北京科技大学 | Heat treatment process of brazing tool steel XGQ25 with gradient hardness distribution |
| CN106521402A (en) * | 2016-11-29 | 2017-03-22 | 金川集团股份有限公司 | Whole heat treatment method for 23CrNi3MoA hollow steel rock drill rod |
-
2017
- 2017-05-15 CN CN201710338692.4A patent/CN107164613A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102776520A (en) * | 2012-08-03 | 2012-11-14 | 西北矿冶研究院 | Heat treatment process for shank of rock drill |
| CN104562048A (en) * | 2014-10-17 | 2015-04-29 | 芜湖扬宇机电技术开发有限公司 | Heat treatment process for En40B type rock drilling tool shank |
| CN105821371A (en) * | 2016-04-06 | 2016-08-03 | 北京科技大学 | Heat treatment process of brazing tool steel XGQ25 with gradient hardness distribution |
| CN106521402A (en) * | 2016-11-29 | 2017-03-22 | 金川集团股份有限公司 | Whole heat treatment method for 23CrNi3MoA hollow steel rock drill rod |
Non-Patent Citations (1)
| Title |
|---|
| 王慧君: "35CrMo钢钎尾热处理工艺的研究", 《金属热处理》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106591774B (en) | A kind of composite heat treating process of H13 mold steel cutter | |
| CN106756755B (en) | The carburization quenching method of large excavator gear | |
| CN103132087B (en) | Technology for controlling hardness distribution of material for 23CrNi3Mo drill tool | |
| CN107805776A (en) | A kind of carburizing carbon potential DISTRIBUTION CONTROL PROCESS of 23CrNi3MoA drilling tools material | |
| CN104562048A (en) | Heat treatment process for En40B type rock drilling tool shank | |
| CN102776520B (en) | Heat treatment process for shank of rock drill | |
| CN106141595A (en) | The soldering of pick and heat treatment integrated technique | |
| CN109536691A (en) | A kind of preparation method of low-temperature impact-resistant CrMo alloy steel forging circle | |
| CN105349940A (en) | Carburizing and carbonitriding combined heat treatment method for hot forging marking die steel | |
| KR20160048629A (en) | Drill bit for drilling and method of manufacturing the same | |
| CN110129526A (en) | A kind of preparation method of high wind pressure diamond down-the-hold drill bit steel body and drill bit using the steel body | |
| CN105063320B (en) | A kind of preparation method of high-wind pressure impactor piston | |
| CN102703908A (en) | Heat treatment method of impact piston | |
| CN107345267A (en) | A kind of high-performance TBM disk cutter Technologies for Heating Processing | |
| CN108588388A (en) | A kind of heat treatment method for gear wheel | |
| CN108103300A (en) | A kind of high-speed steel tool heat treatment process | |
| CN101343978A (en) | High-wind pressure impactor piston | |
| CN107164613A (en) | A kind of shank of rock drill heat treatment method | |
| CN105821371B (en) | A kind of heat treatment process of the rock-drill steel XGQ25 with hardness gradient distribution | |
| CN106222365A (en) | A kind of Wear-resistant Treatment technique improving transmission line hardware | |
| CN1021658C (en) | Quick thermal treatment process of tooth palm of drill toothed wheel | |
| CN106119768B (en) | A kind of processing method of slips | |
| CN112795730B (en) | Heat treatment method for improving performance of drilling tool for down-the-hole drill | |
| CN109321868A (en) | A kind of heat treatment process of high abrasion round-link chain | |
| CN103627872B (en) | A kind of heat treating method of C type fast shackle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170915 |
|
| WD01 | Invention patent application deemed withdrawn after publication |