CN1093018C - Inserted cast cutting tooth of coal cutter - Google Patents
Inserted cast cutting tooth of coal cutter Download PDFInfo
- Publication number
- CN1093018C CN1093018C CN97119732A CN97119732A CN1093018C CN 1093018 C CN1093018 C CN 1093018C CN 97119732 A CN97119732 A CN 97119732A CN 97119732 A CN97119732 A CN 97119732A CN 1093018 C CN1093018 C CN 1093018C
- Authority
- CN
- China
- Prior art keywords
- pick
- coal
- cutting tooth
- castingin
- winning machine
- 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.)
- Expired - Fee Related
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- Component Parts Of Construction Machinery (AREA)
- Forging (AREA)
Abstract
The present invention belongs to a novel metal alloy material. A hard alloy is connected with a cutting tooth body in an inserted casting mode, is positioned in a mould cavity by a special positioning method and is formed by one-step casting, and therefore, the problem of falling off of the hard alloy in coal work is solved. The alloy compositions of the cutting tooth body are optimized in orthogonality by a multifactor orthogonal method L27(3<4>), which not only guarantees the shock resistant property of the cutting tooth body, but also strengthens the wear resistant property of the cutting tooth body, and therefore, the service life of the cutting tooth in the coal work is greatly prolonged.
Description
The invention belongs to a kind of novel metal alloy material product.The castingin pick is made up of pick body and carbide alloy two parts, and denticle connects with carbide alloy employing imbedding process, the alloying component of denticle adopts orthogonal optimization combination, casting one-shot forming new method.
The coal winning machine cutting bit of present domestic use, denticle adopts the alloy steel forging molding, and carbide alloy adopts welding-on to connect with the pick body.＜People's Republic of China (PRC) coal industry standard: MT/T246-91〉(coal winning machine cutting bit: 4.3～4.4) regulation: the pick body adopts structural alloy steel, should have good forgeability, and its chemical composition and mechanical performance should meet the GB3077 regulation; Its physical property of the carbide alloy of welding-on and organizational styucture should meet the regulation of YB883 on the pick body, and YG13C type carbide alloy is adopted in suggestion.The coal winning machine cutting bit of this forging welding-on has good toughness, shock proof advantage, but also has deficiencies such as abrasion resistance is low, carbide alloy easily comes off, manufacturing process complexity simultaneously.
Coal-winning machine castingin pick of the present invention is possessing not easily brokenly, under the good prerequisite of shock resistance, has strengthened anti-wear performance.Owing to adopt imbedding process, have two kinds of forms of metallurgical melting and physical bond between carbide alloy and the pick body, make adhesion raising between carbide alloy and the pick body, solved pick carbide alloy in coal work problem that comes off.
The pick body of coal-winning machine castingin pick of the present invention adopts low-alloy wear-resistant steel, with carbide alloy and the moulding of denticle one-step casting.The denticle alloying component adopts multifactor Orthogonal Method [L
27(3
13) orthogonal arrage] being optimized combination, its alloying component contains: C 0.3～0.6%, and Cr 1.2～2.0%, Si≤0.5%, Cu≤0.6%, Mo≤0.5%, Mn 0.3～0.7%.This alloying component has promptly improved abrasion resistance to this coal-winning machine of castingin pick part in addition, has guaranteed shock resistance again.
The Technology for Heating Processing that coal-winning machine castingin pick of the present invention adopts is, temperature is at 890 ℃ ± 10 ℃, temperature retention time crown shrend in 30 minutes, and the air quenching of tooth handle is used 210 ℃ ± 10 ℃ again, is incubated 2 hours and carries out tempering.Because the hardening media difference of crown, tooth handle is so provide assurance to the different mechanical property in each position of castingin pick.
The intensity that combines between the pick body of coal-winning machine castingin pick of the present invention and the carbide alloy is τ through shear test
Real＞210Mpa, carbide alloy and pick body are simultaneously crushed, and both do not produce separation, have surpassed " coal industry standard: MT/T-246-91 " τ
Fair＞180Mpa standard.
Coal-winning machine castingin pick of the present invention is 412～453kN through the universal testing machine pressure test, surpasses " coal industry standard: MT/T-246-91 " 205kN permissible value.
Coal-winning machine castingin pick sample impact property ak＞49J/cm of the present invention
2More than, hardness is HRc＞45, all meets or exceeds " coal industry standard: MT/T-246-91 " ak
Fair＞49J/cm
2, HRc
Fair＞40～45.
On July 12nd, 1997 was newly pacified the colliery in Heilongjiang Province Shuangyashan Mining Administration, the test of installing of castingin pick.This mine belongs to the hard coal seam, and gangue is limestone and sandstone, and its spoil hardness is f 〉=3.12 picks all are installed in cylinder open the position, limit, the position of the stressed maximum of pick when promptly mining.The continuous coal work through 96 hours, the result is: throwing is lost 3, is fractureed 2, remains 7.According to the damage type analysis, throwing the main cause of losing and fractureing is machining pick off-dimension, and the holddown groove of pick is excessive or too small, makes holddown groove inoperative.The carbide alloy of last 7 castingin picks does not come off, and anti-wear performance is higher than forging welding-on pick far away.
Claims (3)
1, a kind of coal-winning machine castingin pick is made up of pick body and carbide alloy two parts, and it is characterized in that: the pick body is connected by castingin with carbide alloy, and the material of pick body is a kind of low-alloy wear-resistant steel.
2, coal-winning machine castingin pick according to claim 1, it is characterized in that: the composition of said pick body is: C 0.3～0.6%, and Cr 1.2～2.0%, Si≤0.5%, Cu≤0.6%, Mo≤0.5%, Mn 0.3～0.7%.
3, coal-winning machine castingin pick according to claim 1 is characterized in that: heat-treat casting resulting pick body, temperature is 890 ± 10 ℃, be incubated rear tooth point shrend in 30 minutes, the air quenching of tooth handle is used 210 ± 10 ℃ again, and temperature retention time was carried out tempering in 2 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97119732A CN1093018C (en) | 1997-10-10 | 1997-10-10 | Inserted cast cutting tooth of coal cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97119732A CN1093018C (en) | 1997-10-10 | 1997-10-10 | Inserted cast cutting tooth of coal cutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1214283A CN1214283A (en) | 1999-04-21 |
| CN1093018C true CN1093018C (en) | 2002-10-23 |
Family
ID=5175532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97119732A Expired - Fee Related CN1093018C (en) | 1997-10-10 | 1997-10-10 | Inserted cast cutting tooth of coal cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1093018C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259181A (en) * | 2010-11-03 | 2011-11-30 | 鞍钢集团矿业公司 | Cast-in method with function of improving wear resistance and usability of driving wheel of electric shovel |
| CN104047604B (en) * | 2014-06-10 | 2016-05-18 | 高建军 | A kind of composite cutter bit and manufacture method thereof |
| CN115354187B (en) * | 2022-08-31 | 2023-06-06 | 中国矿业大学 | High-wear-resistance sparkless composite material, cutting pick of coal mining machine and preparation method of cutting pick |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2069923U (en) * | 1990-01-20 | 1991-01-23 | 单忠仁 | Pick for tunnelling machine and coal cutter |
-
1997
- 1997-10-10 CN CN97119732A patent/CN1093018C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2069923U (en) * | 1990-01-20 | 1991-01-23 | 单忠仁 | Pick for tunnelling machine and coal cutter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1214283A (en) | 1999-04-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JIAMUSI JIADA HIGH & NEW TECHNOLOGY DEVELOPMENT C Free format text: FORMER OWNER: JIAMUSI UNIVERSITY Effective date: 20080620 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080620 Address after: No. 148, Xuefu Road, Jiamusi, Heilongjiang Patentee after: Jiamusi Jiada hi tech Development Co Ltd Address before: No 46, southwest Gang, Jiamusi, Heilongjiang Patentee before: Jiamusi University |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20021023 Termination date: 20151010 |
|
| EXPY | Termination of patent right or utility model |