CN101684518A - Pick for mining and method for carrying out heat processing on same - Google Patents
Pick for mining and method for carrying out heat processing on same Download PDFInfo
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- CN101684518A CN101684518A CN200810222947A CN200810222947A CN101684518A CN 101684518 A CN101684518 A CN 101684518A CN 200810222947 A CN200810222947 A CN 200810222947A CN 200810222947 A CN200810222947 A CN 200810222947A CN 101684518 A CN101684518 A CN 101684518A
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Abstract
The invention discloses a method for carrying out heat processing on picks for mining, comprising the following steps: heating the mixture of borax, aluminum, vanadium, chromium powder and fluridizerfor 16-20h at the temperature of 900-950 DEG C; keeping the heating temperature, putting picks into the above mixture to carry out diffusion metallizing; carrying out quenching treatment on the picksafter diffusion metallizing; and carrying out tempering treatment on the picks after quenching treatment. In addition, the invention also discloses picks for mining obtained by the above method. In the invention, a liquid diffusion metallizing method is utilized to carry out heat treatment on picks, thereby greatly improving the hardness of pick surface and the hardness of a cone rod part, prolonging pick service life which is 1-1.5 times of general picks, having no need of replacing picks usually, greatly improving work efficiency, shortening stop time, reducing cost of digging, and simultaneously saving energy source.
Description
Technical field
The present invention relates to the mining machinery field, particularly relate to a kind of pick for mining that is installed on the mining machinery and reach its method of heat-treating.
Background technology
Pick is used on the mining machinery, and particularly the colliery pick is a large amount of a kind of attrition components that use of equipment such as coal industry coalcutter, development machine.Existing pick all is to be made by solid carburizing, metallic cementation by 35CrMo usually, and metallic cementation comprises infiltration borax, vanadium, chromium powder, aluminium and fluorizating agent.The degree of depth that has metallic cementation through the product after this thermal treatment process processing is more shallow, and hardness is lower, the shortcoming that wears no resistance, therefore, also easier damage has increased the number of times of equipment replacement picks such as coalcutter, development machine, loses time, inefficiency simultaneously, has also increased cost of mining.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of pick that has high rigidity, uses Shou Minchang, high efficiency, saving cost of mining is provided, particularly provides a kind of and be installed in the pick for mining on the mining machinery and it is heat-treated method.
For achieving the above object, on the one hand, technical scheme of the present invention provides a kind of method that pick for mining is heat-treated, and may further comprise the steps: under 900～950 ℃ temperature, and the mixture of heating borax, aluminium, vanadium, chromium powder and fluorizating agent 16～20 hours; Keep above-mentioned Heating temperature, pick is put into said mixture, carry out metallic cementation; Pick behind the metallic cementation is carried out quench treatment; Pick after quenching is carried out temper.
Wherein, after temper, comprise that also the pick after the temper is carried out the metal spraying emery to be handled.
Wherein, carry out the time maintenance of metallic cementation more than 6 hours.
Wherein, the shared quality percentage composition of borax, aluminium, vanadium and fluorizating agent is respectively: 15%, 10～20%, 43%, 8～13%, and all the other are chromium powder.
Wherein, described Heating temperature is 920 ℃.
Wherein, described quenching temperature is 750～800 ℃.
Wherein, described quenching temperature is 780 ℃
Wherein, described tempering temperature is 150～200 ℃
On the other hand, technical scheme of the present invention also provides a kind of pick for mining of utilizing above-mentioned heat treating method to obtain, comprises cone portion, pick bar, and described pick for mining is made by tool steel.
Wherein, the hardness HRC (Rockwell hardness) of described awl bar portion is greater than 65, and pick bar hardness is HRC28～32, and the surface hardness HV of described pick for mining (Vickers' hardness) is greater than 2000.
Technique scheme has following advantage: adopt the method for liquid metallic cementation that pick is heat-treated; make the hardness of pick surface hardness and awl bar portion all obtain bigger raising; prolonged the work-ing life of pick; it is 1～1.5 times of common pick; and do not need often to change pick, and improved working efficiency greatly, shortened stop time; reduce cost of mining, also saved the energy simultaneously.
Description of drawings
Fig. 1 is a kind of schema that pick for mining is heat-treated of the embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
The pick of present embodiment is used for mining machinery, especially for equipment such as the coalcutter of coal industry, development machines, is processed by tool steel.After the pick machining finishes, also need to heat-treat and carry out modulation treatment, as shown in Figure 1, mainly may further comprise the steps:
S101 prepares the modulation material, and material comprises borax, aluminium, vanadium, chromium powder and fluorizating agent, and wherein, borax, aluminium, vanadium, the shared mass percent of fluorizating agent are respectively: 15%, 10～20%, 43%, 8～13%, and all the other are chromium powder.
S102, under 900～950 ℃ temperature, heating said mixture 16 was by 20 hours.Under said temperature, borax, aluminium and fluorizating agent fusing back and vanadium, full and uniform the mixing of chromium powder, well-mixed said mixture helps on the pick surface carrying out fully, uniformly metallic cementation.Above-mentioned Heating temperature is preferably 920 ℃, and be preferably 16 hours heat-up time.
S103 keeps above-mentioned Heating temperature, and pick is put into said mixture, carries out metallic cementation, and keeps more than 6 hours.Adopt liquid metallic cementation method, can improve the metallic cementation degree of depth and uniformity coefficient, improve the hardness on pick surface.
S104 carries out quench treatment to the pick behind the metallic cementation, and quenching temperature is 750～800 ℃, and wherein preferred temperature is 780 ℃.
S105 carries out temper to the pick after quenching, and tempering temperature is 150～200 ℃.
S106 carries out the metal spraying emery to the pick after the temper and handles.
Through the pick of above-mentioned processing, the hardness HRC (Rockwell hardness) of awl bar portion is greater than 65, and pick bar hardness is HRC28～32, and surface hardness HV (Vickers' hardness) is greater than 2000.
As can be seen from the above embodiments; the embodiment of the invention is heat-treated pick by the method that adopts the liquid metallic cementation; make the hardness of pick surface hardness and awl bar portion all obtain bigger raising; having prolonged the work-ing life of pick, is 1～1.5 times of common pick, and does not need often to change pick; improved working efficiency greatly; shorten stop time, reduced cost of mining, also saved the energy simultaneously.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1, a kind of method that pick for mining is heat-treated is characterized in that, may further comprise the steps:
Under 900～950 ℃ temperature, the mixture of heating borax, aluminium, vanadium, chromium powder and fluorizating agent 16～20 hours;
Keep above-mentioned Heating temperature, pick is put into said mixture, carry out metallic cementation;
Pick behind the metallic cementation is carried out quench treatment;
Pick after quenching is carried out temper.
2, the method that pick for mining is heat-treated as claimed in claim 1 is characterized in that, after temper, comprises that also pick is carried out the metal spraying emery to be handled.
3, the method that pick for mining is heat-treated as claimed in claim 1 is characterized in that, the time of carrying out metallic cementation keeps more than 6 hours.
4, the method that pick for mining is heat-treated as claimed in claim 1 is characterized in that, the shared quality percentage composition of borax, aluminium, vanadium and fluorizating agent is respectively: 15%, 10～20%, 43%, 8～13%, and all the other are chromium powder.
5, the method that pick for mining is heat-treated as claimed in claim 1 is characterized in that, 920 ℃ of described Heating temperatures.
6, the method that pick for mining is heat-treated as claimed in claim 1 is characterized in that, described quenching temperature is 750～800 ℃.
7, the method that pick for mining is heat-treated as claimed in claim 6 is characterized in that, described quenching temperature is 780 ℃.
8, the method that pick for mining is heat-treated as claimed in claim 1 is characterized in that, described tempering temperature is 150～200 ℃.
9, a kind of pick for mining of utilizing the described heat treating method of claim 1 to obtain comprises cone portion, pick bar, it is characterized in that described pick for mining is made by tool steel.
10, pick for mining as claimed in claim 9 is characterized in that, the hardness HRC of described awl bar portion is greater than 65, and pick bar hardness is HRC28～32, and the surface hardness HV of described pick for mining is greater than 2000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810222947A CN101684518A (en) | 2008-09-23 | 2008-09-23 | Pick for mining and method for carrying out heat processing on same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810222947A CN101684518A (en) | 2008-09-23 | 2008-09-23 | Pick for mining and method for carrying out heat processing on same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101684518A true CN101684518A (en) | 2010-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810222947A Pending CN101684518A (en) | 2008-09-23 | 2008-09-23 | Pick for mining and method for carrying out heat processing on same |
Country Status (1)
| Country | Link |
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| CN (1) | CN101684518A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935745A (en) * | 2010-08-05 | 2011-01-05 | 山西鑫博瑞科技有限公司 | Heat treatment device and heat treatment method for coal cutting teeth |
| CN103451401A (en) * | 2013-08-29 | 2013-12-18 | 安徽理工大学 | Heating-equalizing device in thermal treatment of conical pick |
-
2008
- 2008-09-23 CN CN200810222947A patent/CN101684518A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935745A (en) * | 2010-08-05 | 2011-01-05 | 山西鑫博瑞科技有限公司 | Heat treatment device and heat treatment method for coal cutting teeth |
| CN103451401A (en) * | 2013-08-29 | 2013-12-18 | 安徽理工大学 | Heating-equalizing device in thermal treatment of conical pick |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20100331 |