CN109676283B - Active brazing filler metal for diamond saw blade - Google Patents
Active brazing filler metal for diamond saw blade Download PDFInfo
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- CN109676283B CN109676283B CN201811630760.5A CN201811630760A CN109676283B CN 109676283 B CN109676283 B CN 109676283B CN 201811630760 A CN201811630760 A CN 201811630760A CN 109676283 B CN109676283 B CN 109676283B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/302—Cu as the principal constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/40—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling foils which present special problems, e.g. because of thinness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
- B23K35/0233—Sheets, foils
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- Engineering & Computer Science (AREA)
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- Ceramic Products (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention provides an active brazing filler metal for a diamond saw blade, which is characterized in that aluminum silicon nickel is compositely added on the basis of a copper tin titanium active brazing filler metal, so that a diamond product can be sintered or brazed under the protection of gas, the production process is facilitated to be simplified, and the production cost is reduced; the active brazing filler metal is also rolled to be prepared into a sheet shape, and the method comprises the following steps of carrying out rough rolling, intermediate rolling and finish rolling on a cast-rolled or hot-rolled blank with the thickness of 0.35-0.65 mm in the presence of rolling oil to obtain the sheet brazing filler metal with the thickness of 0.0075-0.0099 mm; the obtained solder alloy has good wettability to diamond and low melting point; under the solid solution strengthening effect of the aluminum nickel element and the multiple effects of the active element titanium and the like, when the active solder alloy is used for brazing the diamond and the matrix, the diamond and the matrix can form firm metallurgical bonding, and the shear strength of the active solder brazing graphite/No. 45 steel joint can reach 355 MPa.
Description
Technical Field
The invention belongs to the technical field of brazing materials, and particularly relates to an active brazing filler metal for a diamond saw blade.
Background
The working conditions of the diamond saw blade are severe, the welding of the diamond tool bit is strictly required by high speed, vibration and high temperature, and the requirement on the welding seam strength of the diamond saw blade is higher and higher along with the continuous improvement of the cutting speed and the feed amount of the saw blade. When the diamond tool is manufactured by brazing, elements capable of interacting with diamond with stable electronic coordination are added into the brazing filler metal, so that the wettability of the brazing filler metal on the surface of the diamond can be obviously improved, and metallurgical bonding between the brazing filler metal and the diamond is formed. The active solder for soldering diamond mainly comprises Ni-based active solder, Ag-based active solder and Cu-based active solder. The liquidus melting temperature of the Ni-based active solder is generally higher than 900 ℃, and the diamond is easy to have thermal damage in the brazing process. The Ag-based active solder has low soldering temperature and good soldering joint performance, but the higher silver content increases the soldering cost and limits the use amount of the Ag-based active solder.
The Cu-based active solder has better wettability to diamond, saves the soldering cost and has better economy, thereby being concerned about. The common Cu-based active solder comprises CuSnTi, CuSnTiNi and CuSnTiZr, wherein the liquidus line of the copper-based active solder is above 850 ℃ under the condition of ensuring the strength of the solder, and the maximum shearing strength of the active solder for soldering graphite and No. 45 steel joints can reach 350 MPa. The patent CN101913036B discloses a CuSnTi active solder, which can obtain a complete liquid phase below 800 ℃, and the shear strength of the joint between the graphite and No. 45 steel soldered by the active solder can reach 301.4 MPa.
It is not very difficult from a technical point of view to produce such thin sheet-like filler metal, but it is not easy to produce such filler metal of high quality efficiently on a large scale. At present, domestic manufacturers mostly perform five-pass rolling procedures when rolling double zero foils, namely a three-pass rough rolling procedure, a one-pass middle rolling procedure and a one-pass finish rolling procedure. The reduction rate per pass of the rolling process rarely exceeds 55%.
Disclosure of Invention
In order to solve the problems, the invention provides the active brazing filler metal for the diamond saw blade, the prepared brazing filler metal alloy has low melting point, and the active brazing filler metal can improve the wear resistance and the holding force of the diamond saw blade.
In order to achieve the purpose, the invention adopts the technical scheme that:
the active brazing filler metal for the diamond saw blade is characterized in that: the active solder comprises the following components in percentage by mass: 60-70% of Cu, 13-19% of Sn, 6-10% of Al, 4-9% of Ti, 1-3% of Si, 0.25-1.2% of Mn and 0-0.1% of trace elements.
Further, the active solder comprises the following components in percentage by mass: 61-69% of Cu, 14-18% of Sn, 6.5-9.5% of Al, 5-8.5% of Ti, 1.5-3% of Si and 0.1-1.0% of Mn.
Further, the active solder comprises the following components in percentage by mass: 62-68% of Cu, 15-17% of Sn, 7-9% of Al, 6-8% of Ti and 2-3% of Si.
Further, the trace elements include at least one of La, Ce, Ga, Cr and Zr.
Further, the active solder is rolled into a sheet shape.
Further, the preparation method of the flaky active solder comprises the following steps:
step one, casting and rolling or hot rolling the active brazing filler metal to obtain a blank with the thickness of 0.35-0.65 mm;
and step two, the blank in the step one is subjected to rough rolling, intermediate rolling and finish rolling in the presence of rolling oil to obtain the sheet-shaped active brazing filler metal with the thickness of 0.0075-0.0099 mm.
Further, the rolling oil temperature of rough rolling is 35-45 ℃, and the rolling oil temperature of intermediate rolling and finish rolling is 40-50 ℃.
Further, the second step is subjected to two times of rough rolling, wherein the first time of rough rolling is used for rolling the blank with the thickness of 0.35-0.65 mm to the thickness of 0.145-0.165 mm, the speed of a rolling mill is 750-950 m/min, the rolling pressure is 1800-2500 KN, the second time of rough rolling is used for rolling the blank with the thickness of 0.145-0.165 mm to the thickness of 0.054-0.083 mm, the speed of the rolling mill is 1150-1400 m/min, and the rolling pressure is 1200-1650 KN; in the middle rolling process, rolling the blank with the thickness of 0.054-0.083 mm to the thickness of 0.019-0.032 mm, wherein the speed of a rolling mill is 1150-1700 m/min, and the rolling pressure is 1600-2100 KN; the finish rolling procedure is to roll the blank with the thickness of 0.019-0.032 mm to the thickness of 0.0075-0.0099 mm, the speed of a rolling mill is 350-550 m/min, and the rolling pressure is 1250-1500 KN.
Further, the tensile stress of the sheet-shaped active brazing filler metal after rough rolling of the first pass is 20-30N/mm2The tensile stress after the second pass rolling is 20-40N/mm2The tensile stress after intermediate rolling is 35-45N/mm2Tensile stress after finish rolling is 45-55N/mm2。
In the technical scheme of the invention, the passes are distributed in the following modes:
the rolling pass distribution scheme of the flaky active brazing filler metal is as follows:
the technological parameters of rolling are as follows:
the invention has the beneficial effects that:
1. the active brazing filler metal for the diamond saw blade mainly contains copper, tin, aluminum and titanium, the aluminum and the silicon are added on the basis of the copper-tin-titanium active brazing filler metal in a compounding manner, the obtained brazing filler metal has low alloy melting point, diamond and a matrix form firm metallurgical bonding during brazing, the bonding strength is high, the holding force on the diamond is high, the welding temperature during brazing connection is low, the thermal damage to the diamond is small, precious metal elements such as silver and the like are not easily brazed, a diamond product can be sintered or brazed under the protection of gas, the process is simple, and the cost is low;
2. compared with the prior art, the invention reduces one rolling procedure, only uses four passes to roll the sheet solder, the comprehensive yield of the produced product is more than that of the prior art, and is far higher than the average comprehensive yield in the industry, the rolling oil consumption is reduced, namely, the oil consumption can be reduced by about ten tons per month, the energy is greatly saved, the operation cost is obviously reduced, and the production benefit is improved. Because the one-time rolling procedure is reduced, the production process is shortened, the production time is reduced, the production efficiency is effectively improved, the one-time procedure is reduced, the discharge of waste such as sewage in the procedure is reduced, the pollutant discharge is effectively reduced, and the environment is protected.
Drawings
FIG. 1 is a scanning electron micrograph of diamond/active braze.
Wherein, each reference number in the figure is: A. diamond; B. a diamond/active braze interface; C. and (3) active solder.
Detailed Description
In order that those skilled in the art will be able to better understand the technical solutions provided by the present invention, the following description is provided in conjunction with the specific embodiments.
The active solder comprises the following components in percentage by mass: cu 60-70%, Sn 13-19%, Al 6-10%, Ti 4-9%, Si 1-3%, Ni 0.01-2%, Mn 0.25-1.2%, 0-0.1% of trace elements, wherein the trace elements are at least one of La, Ce, Ga, Cr and Zr.
The preparation method of the active flaky brazing filler metal comprises the following steps:
a high-reduction rolling process for a sheet brazing filler metal comprises the step of carrying out two times of rough rolling on a brazing filler metal alloy cast-rolled blank with the thickness of 0.35-0.65 mm, wherein the rolling oil is added in a proportion of 2.5-4.0% of rough rolling ester and 2.0-4.5% of alcohol. In the first rough rolling procedure, the speed of the rolling mill is controlled to be 750-950 m/min, the oil temperature of rolling is 35-45 ℃, the rolling pressure is 1800-2500 KN, and the tensile stress before rolling is 15-25N/mm2The tensile stress after rolling is 20-30N/mm2The thickness of the nameplate foil after the first-pass rough rolling is 0.145-0.165 mm, the thickness of the nameplate foil after the second-pass rough rolling is 0.054-0.083 mm, the speed of a rolling mill in the second-pass rough rolling procedure is 1150-1400 m/min, the temperature of the rolling oil is 35-45 ℃, the rolling pressure is 1200-1650 KN, and the tensile stress before rolling is 20-30N/mm2The tensile stress after rolling is 25-35N/mm2. The thickness of the sheet-shaped brazing filler metal after two times of rough rolling can reach 0.019-0.032 mm after one time of single-sheet and medium rolling, the speed of a rolling mill in medium rolling is 1150-1700 m/min, the temperature of rolling oil is 40-50 ℃, the proportion of rolling oil additives is 2.5-4.0% of medium rolling vinegar and 2.0-4.5% of alcohol by volume percent, the rolling pressure of medium rolling is 1600-2100 KN, and the tensile stress before rolling is 25-35N/mm2The post-rolling tensile stress is 35 to 50N/mm2. And then rolling and finish rolling to obtain a finished product of the sheet brazing filler metal with the thickness of 0.0075-0.0099 mm. In the finish rolling, the speed of a rolling mill is 350-550 m/min, the rolling oil temperature is 40-50 ℃, the rolling pressure is 1250-1500 KN, and the tensile stress before rolling is 35-50N/mm2Post-rolling tensile stressIs 45 to 55N/mm2The rolling oil additive comprises 1.5-3.5% of fine rolling ester and 2.0-1.5% of alcohol by volume percentage.
Of course, after the intermediate rolling, two single sheet-shaped active solders can also be subjected to double uncoiling rolling in a finishing mill.
Example 1
The active solder alloy of the embodiment comprises the following components in percentage by mass: cu64%, Sn16%, Al8%, Ti8%, Si2%, Ni1.2% and Mn0.8%.
The distribution scheme of rolling passes of the 0.0075mm sheet brazing filler metal is as follows:
the rolling process parameters are as follows:
the active solder alloy of the embodiment can obtain a complete liquid phase at the temperature of below 830 ℃; in the characterization of the active filler metal of the present invention, it is difficult to quantify the brazing bonding strength of diamond and the substrate due to the brazing of diamond particles. And the elements of the graphite and the diamond are carbon, so that the matrix brazing graphite is used as a shearing sample, the bonding strength of the carbon and the matrix is quantized, and the bonding strength of the matrix and the diamond particles is further proved. Specifically, the active solder prepared in the embodiment is used as a raw material, an active solder brazing graphite shear sample is prepared, the shear strength of the active solder brazing graphite and No. 45 steel in the embodiment is measured, and the shear strength of the active solder brazing graphite/No. 45 steel joint can reach 360.5 MPa.
Fig. 1 is a scanning electron microscope picture of the diamond/active solder of the present embodiment, in which a region a is a diamond region, a region B is a diamond/active solder interface region, and a region C is an active solder region; as can be seen, the diamond is smooth and intact, and no significant thermal damage is produced. And the interface bonding between the diamond and the active braze is good.
Example 2
The active solder alloy of the embodiment comprises the following components in percentage by mass: cu65%, Sn15%, Al9%, Ti7.5%, Si2.5% and Mn 1%.
The rolling pass distribution scheme of the 0.0080mm sheet brazing filler metal is as follows:
the rolling process parameters are as follows:
the active solder alloy of the embodiment can obtain a complete liquid phase at a temperature below 815 ℃; when the active solder of the embodiment is used for induction brazing of graphite and No. 45 steel, the shear strength of the joint between the graphite brazed by the active solder and the No. 45 steel can reach 357.5 MPa.
Example 3
The active solder alloy of the embodiment comprises the following components in percentage by mass: cu67%, Sn12%, Al11%, Ti8% and Si 2%.
The preparation process comprises the following steps:
the rolling pass distribution scheme of the 0.0095mm sheet brazing filler metal is as follows:
the rolling process parameters are as follows:
the active solder alloy of the embodiment can obtain a complete liquid phase at the temperature of below 810 ℃; when the active solder of the embodiment is used for induction brazing of graphite and No. 45 steel, the shear strength of the joint between the graphite brazed by the active solder and the No. 45 steel can reach 355.0 MPa.
Example 4
The active solder alloy of the embodiment comprises the following components in percentage by mass: cu64%, Sn16%, Al8%, Ti8%, Si2%, Ni1.2%, Mn0.75%, and Cr0.05%.
The preparation process comprises the following steps:
the distribution scheme of rolling passes of the 0.01mm sheet brazing filler metal is as follows:
the rolling process parameters are as follows:
the active solder alloy of the embodiment can obtain a complete liquid phase at a temperature below 825 ℃; when the active solder of the embodiment is used for induction brazing of graphite and No. 45 steel, the shear strength of the joint between the graphite brazed by the active solder and the No. 45 steel can reach 365.5 MPa.
Example 5
The active solder alloy of the embodiment comprises the following components in percentage by mass: cu64%, Sn16%, Al8%, Ti8%, Si2%, Ni1.2%, Mn0.73%, Zr0.07%.
The preparation process comprises the following steps:
the distribution scheme of rolling passes of the 0.0075mm sheet brazing filler metal is as follows:
the rolling process parameters are as follows:
the active solder alloy of the embodiment can obtain a complete liquid phase at a temperature below 825 ℃; when the active solder of the embodiment is used for induction brazing of graphite and No. 45 steel, the shear strength of the joint between the graphite brazed by the active solder and the No. 45 steel can reach 367.0 MPa.
Example 6
The active solder alloy of the embodiment comprises the following components in percentage by mass: cu67%, Sn12%, Al11%, Ti7.9%, Si2%, Zr0.04% and Cr0.06%.
The preparation process comprises the following steps:
the rolling pass distribution scheme of the 0.0080mm sheet brazing filler metal is as follows:
the rolling process parameters are as follows:
the active solder alloy of the embodiment can obtain a complete liquid phase at the temperature of below 820 ℃; when the active solder of the embodiment is used for induction brazing of graphite and No. 45 steel, the shear strength of the joint between the graphite brazed by the active solder and the No. 45 steel can reach 369.5 MPa.
Example 7
The active solder alloy of the embodiment comprises the following components in percentage by mass: cu62%, Sn17%, Al9%, Ti8%, Si2%, Ni1.1%, Mn0.8%, La0.05% and Ce0.05%.
The preparation process comprises the following steps:
the rolling pass distribution scheme of the 0.0095mm sheet brazing filler metal is as follows:
the rolling process parameters are as follows:
the active solder alloy of the embodiment can obtain a complete liquid phase at a temperature below 815 ℃; when the active solder of the embodiment is used for induction brazing of graphite and No. 45 steel, the shear strength of the joint between the graphite brazed by the active solder and the No. 45 steel can reach 365.0 MPa.
Example 8
The active solder alloy of the embodiment comprises the following components in percentage by mass: cu66.5%, Sn12.1%, Al11%, Ti8.3%, Si2%, La0.03%, Ce0.04%, and Ga0.03%.
The preparation process comprises the following steps:
the distribution scheme of the rolling passes of the 0.0099mm brazing sheet is as follows:
the rolling process parameters are as follows:
the active solder alloy of the embodiment can obtain a complete liquid phase at the temperature of below 810 ℃; when the active solder of the embodiment is used for induction brazing of graphite and No. 45 steel, the shear strength of the joint between the graphite brazed by the active solder and the No. 45 steel can reach 370.0 MPa.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. The present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The active brazing filler metal for the diamond saw blade is characterized in that: the active solder comprises the following components in percentage by mass: 61-69% of Cu, 14-18% of Sn, 6.5-9.5% of Al, 5-8.5% of Ti, 1.5-3% of Si, 0.1-1.0% of Mn and 0-0.1% of trace elements;
the trace elements comprise at least one of La, Ce, Ga, Cr and Zr.
2. The active filler metal for diamond saw blade according to claim 1, wherein: the active solder comprises the following components in percentage by mass: 62-68% of Cu, 15-17% of Sn, 7-9% of Al, 6-8% of Ti and 2-3% of Si.
3. The active filler metal for diamond saw blade according to claim 1, wherein: the active solder is also rolled into a sheet shape.
4. The active filler metal for diamond saw blade according to claim 3, wherein: the preparation method of the flaky active solder comprises the following steps:
step one, casting and rolling or hot rolling the active brazing filler metal to obtain a blank with the thickness of 0.35-0.65 mm;
and step two, the blank in the step one is subjected to rough rolling, intermediate rolling and finish rolling in the presence of rolling oil to obtain the sheet-shaped active brazing filler metal with the thickness of 0.0075-0.0099 mm.
5. The active filler metal for diamond saw blade according to claim 4, wherein: the rolling oil temperature of rough rolling is 35-45 ℃, and the rolling oil temperature of intermediate rolling and finish rolling is 40-50 ℃.
6. The active filler metal for diamond saw blade according to claim 4, wherein: the second step is implemented through two times of rough rolling, wherein the first time of rough rolling is used for rolling the blank with the thickness of 0.35-0.65 mm to the thickness of 0.145-0.165 mm, the speed of a rolling mill is 750-950 m/min, the rolling pressure is 1800-2500 KN, the second time of rough rolling is used for rolling the blank with the thickness of 0.145-0.165 mm to the thickness of 0.054-0.083 mm, the speed of the rolling mill is 1150-1400 m/min, and the rolling pressure is 1200-1650 KN; in the middle rolling process, rolling the blank with the thickness of 0.054-0.083 mm to the thickness of 0.019-0.032 mm, wherein the speed of a rolling mill is 1150-1700 m/min, and the rolling pressure is 1600-2100 KN; the finish rolling procedure is to roll the blank with the thickness of 0.019-0.032 mm to the thickness of 0.0075-0.0099 mm, the speed of a rolling mill is 350-550 m/min, and the rolling pressure is 1250-1500 KN.
7. The active filler metal for diamond saw blade according to claim 6, wherein: the tensile stress of the sheet-shaped active brazing filler metal after rough rolling and first-pass rolling is 20-30N/mm2The tensile stress after the second pass rolling is 20-40N/mm2The tensile stress after intermediate rolling is 35-45N/mm2Tensile stress after finish rolling is 45-55N/mm2。
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| CN106238962A (en) * | 2016-08-30 | 2016-12-21 | 郑州机械研究所 | A kind of active solder alloy |
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| CN101168168A (en) * | 2007-11-30 | 2008-04-30 | 大亚科技股份有限公司 | Double zero aluminium foil heavy reduction rate rolling technique |
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| CN105397327A (en) * | 2015-12-16 | 2016-03-16 | 郑州机械研究所 | Lamellar brazing filler metal ring for thin-wall drill and manufacturing method of lamellar brazing filler metal ring |
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