CN109909642A - A kind of pick-shaped cutter soldering solder and pick-shaped cutter method for welding - Google Patents
A kind of pick-shaped cutter soldering solder and pick-shaped cutter method for welding Download PDFInfo
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- CN109909642A CN109909642A CN201910270779.1A CN201910270779A CN109909642A CN 109909642 A CN109909642 A CN 109909642A CN 201910270779 A CN201910270779 A CN 201910270779A CN 109909642 A CN109909642 A CN 109909642A
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Abstract
A kind of pick-shaped cutter soldering solder and pick-shaped cutter method for welding, it is characterized in that a kind of brazing solder, material component and its mass percent are as follows: nickel content 12-14%, manganese content 30-32%, Theil indices 3-3.5%, rare earth 0.1-0.3%, remaining is copper；Soldering and quenching process carry out simultaneously, avoid the heating of pick material secondary, the especially reheating of weld seam position, it ensure that brazing quality, improve the hardness of tooth head, the wearability of tooth head is more preferable, the shearing strength of weld seam is higher, and the toughness of tooth handle is more preferable, and the service life is longer for pick.
Description
Technical field
The present invention relates to coal mining cutting-tool engineering field more particularly to a kind of pick-shaped cutter soldering solder and pick-shaped cutter prickers
Soldering method.
Background technique
Coalcutter is to realize one of coal mining mechanization and the important equipment of modernization.Coalcutter presses its working method not
With can be divided into four kinds: 1. planing pattern coalcutter, also referred to as coal plough, by the planing tool of reciprocating motion
Coal wall of planing breaks coal；2. sawing formula coalcutter, also referred to as coalcutter, pick are mounted on the cutter chain of shuttling movement, with this depth
Enter coal wall coal cutting；3. drilling formula coalcutter, drill bit pierces coal seam by the cutter tooth at edge, then is broken coal body by the cutter tooth at middle part
It is broken；4. milling type coalcutter, pick are mounted on roller, and break coal by roller rotation milling.What is generallyd use at present is spiral shell
Rotary roll cartridge type coalcutter, belongs to milling type coalcutter.Wherein, pick is the key part that coal petrography is directly cut on coalcutter, is adopted
Most installed powers of coal machine are consumed by it.
Pick-shaped cutter tooth head keeps coal seam broken in coniform, by the wedge of tooth tip, also known as tangential pick, is applicable in
In the more brittleness coal seam in crack.Pick-shaped cutter, including denticle and tooth tip, tooth tip is mainly used generally to adopt in the prior art
With hard alloy, hardness is high but toughness is lower, and denticle generally uses high-quality alloy steel to forge, and toughness is preferable, tooth tip
It is combined together by way of soldering with denticle.Cut tooth losing efficiency form is mainly shown as the abrasion of tooth head position, causes hard
Alloy tooth tip falls off.Traditional pick production technology is brazed first, is then quenched, be brazed and quench respectively into
Row not only causes denticle material to generate Widmannstatten structure, but also generate inside soldered seam so that pick experience is heated at high temperature twice
Tensile stress is serious to reduce pick service life.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of pick-shaped cutter soldering solder and pick-shaped cutter soldering sides
Method provides a kind of pick-shaped cutter brazing solder and method for welding.To achieve the above object, the technical scheme adopted by the invention is as follows:
A kind of pick-shaped cutter soldering solder, material component and its mass percent are as follows:
Nickel content 12-14%, manganese content 30-32%, Theil indices 3-3.5%, rare earth 0.1-0.3%, remaining is copper.
Brazing solder for pick production generally uses copper base solder.Copper has preferable plasticity and corrosion resistance,
But the antioxygenic property of fine copper is poor, and the fusing point of fine copper is 1083 DEG C, and the hardness of alloy can be improved in addition nickel, manganese, and tin is added
Low-alloyed fusing point can drop, and rare earth can reduce dendrite size with refining alloy crystal grain, refine intermetallic compound size.
A kind of pick-shaped cutter soldering pick-shaped cutter method for welding of solder comprising the steps of:
Step 1: according to weld gap size, solder total amount needed for calculating, and powdery or granular solder are filled to welding seam part
Position；
Step 2: pick-shaped cutter is put into vacuum air cooling oil quenching furnace, to guarantee to be brazed vacuum environment, vacuumized in furnace, cold conditions
Vacuum degree control is in 2*10-2Pa or less；
Step 3: heating, heating rate is controlled between 18-20 DEG C/min, to avoid the excessive generation of pick material internal-external temperature difference
Stress keeps the temperature 10 minutes when temperature rises to predetermined temperature between 750 ~ 850 DEG C；
Step 4: volatilizing for solder under less hot environment, vacuum degree is down to 2-3Pa, while further heating up up to 960 DEG C,
Reach brazing temperature, heating rate controls between 8-10 DEG C/min, keeps the temperature 15 minutes, completes soldering operation；
Step 5: cooling, rate of temperature fall is controlled between 18-20 DEG C/min, when temperature is down to predetermined temperature between 830-860 DEG C
When, reach the hardening heat of denticle material, pick-shaped cutter is put into hardening media, completes quenching process, while being filled in furnace
Inert gas boosts to an atmospheric pressure, and then, pick-shaped cutter is taken out in blow-on；
Step 6: tempering heat treatment, temperature is controlled between 430~450 DEG C, is kept the temperature to 60 minutes, then, gradient cooling, drop
Warm rate control is between 18~20 DEG C/min, until dropping to room temperature, completes heat treatment.
Compared with prior art, it the invention has the following advantages: soldering and quenching process carry out simultaneously, avoids and cuts
The reheating of teeth material reheating, especially weld seam position, ensure that brazing quality, improve the hardness of tooth head, tooth head
Wearability it is more preferable, the shearing strength of weld seam is higher, and the toughness of tooth handle is more preferable, and the service life is longer for pick.
Detailed description of the invention
Below in conjunction with attached drawing, the invention will be described in further detail.
Attached drawing 1 is the structural schematic diagram of pick；
In attached drawing: 1, tooth tip, 2, weld seam, 3, tooth head, 4, tooth handle.
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, with reference to the accompanying drawing 1 and specific real
Applying example, the present invention is further illustrated.
As shown in Fig. 1, the pick-shaped cutter includes denticle and tooth tip 1, and the denticle includes tooth head 3 and tooth handle 4,
It is provided with weld seam 2 between tooth tip 1 and tooth handle 4, weld seam 2 is provided between tooth head 3 and tooth handle 4.
Tooth head uses hard alloy, this material trademark used is YG11C, and tooth head uses mould steel, what this was used
Material trademark is Cr12, and tooth handle uses structural alloy steel, this material trademark used is 42CrMo.The chemistry member of above-mentioned material
The mass percent of element is as follows:
Table 1:
A kind of brazing solder, material component and its mass percent are as follows:
Nickel content 12-14%, manganese content 30-32%, Theil indices 3-3.5%, rare earth 0.1-0.3%, remaining is copper.The change of this solder
The mass percent for learning element is as follows:
Table 2:
| wt% | Ni% | Mn% | Sn% | Re% | Cu% |
| 12.5 | 31.6 | 3.30 | 0.15 | Surplus |
A kind of pick-shaped cutter soldering pick-shaped cutter method for welding of solder comprising the steps of:
Step 1: according to weld gap size, solder total amount needed for calculating, and powdery or granular solder are filled to welding seam part
Position；
Step 2: pick-shaped cutter is put into vacuum air cooling oil quenching furnace, to guarantee to be brazed vacuum environment, vacuumized in furnace, cold conditions
Vacuum degree control is in 2*10-2Pa or less；
Step 3: heating, heating rate is controlled between 18-20 DEG C/min, to avoid the excessive generation of pick material internal-external temperature difference
Stress keeps the temperature 10 minutes when temperature rises to predetermined temperature between 750 ~ 850 DEG C；
Step 4: volatilizing for solder under less hot environment, vacuum degree is down to 2-3Pa, while further heating up up to 960 DEG C,
Reach brazing temperature, heating rate controls between 8-10 DEG C/min, keeps the temperature 15 minutes, completes soldering operation；
Step 5: cooling, rate of temperature fall is controlled between 18-20 DEG C/min, when temperature is down to predetermined temperature between 830-860 DEG C
When, reach the hardening heat of denticle material, pick-shaped cutter is put into hardening media, completes quenching process, while being filled in furnace
Inert gas boosts to an atmospheric pressure, and then, pick-shaped cutter is taken out in blow-on；
Step 6: tempering heat treatment, temperature is controlled between 430~450 DEG C, is kept the temperature to 60 minutes, then, gradient cooling, drop
Warm rate control is between 18~20 DEG C/min, until dropping to room temperature, completes heat treatment.
Sample is taken out, 5 parts of samples are made according to different positions, tests hardness, impact flexibility and the weldering of denticle respectively
The shearing strength of seam, wherein hardness is characterized by Rockwell hardness, and wherein impact property test uses the sample of U type notch,
The shearing strength of middle weld seam, the load of the momentary breakdown by testing weld seam, substitutes into ι=P/(π DH), wherein ι indicates that shearing resistance is strong
Degree, P indicate breaking load, and D indicates that hard alloy head diameter, H indicate the hard alloy grease head highness of interception, obtain the shearing resistance of weld seam
Intensity, test result see the table below:
Table 3:
From table 3 it can be seen that the hardness of tooth head is greater than HRC60, according to pick professional standard " MT/T 246-2006 mining machinery
With pick " in regulation, tooth head position surface hardness should be greater than HRC40, and the hardness of tooth head is hard much larger than as defined in professional standard
Degree, wear-resisting property are more preferable；The hardness of tooth handle meets professional standard between HRC38- HRC42, and the impact flexibility of tooth handle is greater than
60 J/cm2, Industry code requirements >=49 J/cm2, the toughness of tooth handle is more preferable, brittle failure is not easy in use process, service life is more
It is long；Weld seam shearing strength is greater than 370MPa, and Industry code requirements are not less than 180MPa, and the shear resistance of weld seam is stronger, tooth tip
It is more difficult to fall off, also improves the service life of pick.
Working principle of the present invention is as follows: the hardness of alloy can be improved in brazing solder addition nickel, manganese, and tin, which is added, to drop
Low-alloyed fusing point, rare earth can reduce dendrite size with refining alloy crystal grain, refine intermetallic compound size, improve weld seam
Intensity；The fusing point of solder reduces, and brazing temperature decreases, the crystal grain of denticle material smaller to the heat affecting of denticle material
Long main trend is smaller, and the crystal grain of denticle tissue is thinner, and toughness is more preferable, and soldering and quenching process carry out simultaneously, avoids pick material
Expect reheating, brazing quality is higher.
Compared with prior art, it the invention has the following advantages: soldering and quenching process carry out simultaneously, avoids and cuts
The reheating of teeth material reheating, especially weld seam position, ensure that brazing quality, improve the hardness of tooth head, tooth head
Wearability it is more preferable, the shearing strength of weld seam is higher, and the toughness of tooth handle is more preferable, and the service life is longer for pick.
Using technical solutions according to the invention or those skilled in the art under the inspiration of technical solution of the present invention,
Similar technical solution is designed, and reaches above-mentioned technical effect, is to fall into protection scope of the present invention.
Claims (2)
1. a kind of pick-shaped cutter soldering solder, characterized in that the component and its mass percent of the solder are as follows: nickel content 12
~14%, manganese content 30~32%, Theil indices 3~3.5%, rare earth 0.1~0.3%, remaining is copper.
2. using the pick-shaped cutter method for welding of solder as described in claim 1, a kind of pick-shaped cutter soldering pick type of solder
Pick method for welding, which comprises the steps of:
(1) according to weld gap size, solder total amount needed for calculating, and powdery or granular solder are filled to weld seam position；
(2) pick-shaped cutter is put into vacuum air cooling oil quenching furnace, is vacuumized in furnace, vacuum degree of cold state is controlled 2 × 10-2Pa with
Under；
(3) it heats up, heating rate controls between 18~20 DEG C/min, rises to predetermined temperature between 750~850 DEG C to temperature
When, keep the temperature 10 minutes；
(4) vacuum degree is down to 2~3Pa, while further heating up until 960 DEG C, heating rate control 8~10 DEG C/min it
Between, keep the temperature 15 minutes；
(5) cool down, rate of temperature fall controls between 18~20 DEG C/min, when temperature is down to predetermined temperature between 830~860 DEG C
When, pick-shaped cutter is put into hardening media, completes quenching process, meanwhile, it is filled with inert gas in furnace and boosts to an atmospheric pressure,
Then, pick-shaped cutter is taken out in blow-on；
(6) tempering heat treatment, temperature control between 430~450 DEG C, keep the temperature to 60 minutes, then, gradient cooling, cooling speed
Rate controls between 18~20 DEG C/min, until dropping to room temperature, completes heat treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910270779.1A CN109909642B (en) | 2019-04-04 | 2019-04-04 | Brazing filler metal for brazing pick-shaped cutting tooth and brazing method for pick-shaped cutting tooth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910270779.1A CN109909642B (en) | 2019-04-04 | 2019-04-04 | Brazing filler metal for brazing pick-shaped cutting tooth and brazing method for pick-shaped cutting tooth |
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| CN109909642A true CN109909642A (en) | 2019-06-21 |
| CN109909642B CN109909642B (en) | 2021-10-15 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110732801A (en) * | 2019-11-05 | 2020-01-31 | 西北有色金属研究院 | Cu-Ni-Mn alloy solder powder and its preparing process |
| CN111408805A (en) * | 2020-03-05 | 2020-07-14 | 西安陕鼓动力股份有限公司 | Manufacturing process method of impeller in same furnace for brazing and performance heat treatment |
| CN114932303A (en) * | 2022-04-29 | 2022-08-23 | 庆安集团有限公司 | High-strength stainless steel copper alloy bimetal compounding method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110732801A (en) * | 2019-11-05 | 2020-01-31 | 西北有色金属研究院 | Cu-Ni-Mn alloy solder powder and its preparing process |
| CN111408805A (en) * | 2020-03-05 | 2020-07-14 | 西安陕鼓动力股份有限公司 | Manufacturing process method of impeller in same furnace for brazing and performance heat treatment |
| CN111408805B (en) * | 2020-03-05 | 2021-09-17 | 西安陕鼓动力股份有限公司 | Manufacturing process method of impeller in same furnace for brazing and performance heat treatment |
| CN114932303A (en) * | 2022-04-29 | 2022-08-23 | 庆安集团有限公司 | High-strength stainless steel copper alloy bimetal compounding method |
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