Technology of drill rod solder produces medium application in diamond tool
- source:AMANCIO CNC Machining
5%O2) plating go up at tool steel matrix, and diamond (do not include the clothes) cloth is discharged go up at solder level, issue solder of inductive drill rod in protection of gas of 1080 ℃ , argon next 30 seconds will realize diamond and steel matrix union. Drill rod expects the Cr in alloy regards a kind of strong carbide as the element, the exterior metallization of diamond comes true to diamond surface rich collect in process of drill rod solder. The Wiand method that introduces on American patent is: Solder (Ni-Cr) metal pink adds organic binder to make paint of drill rod solder, stick the diamond that include the clothes on tool steel matrix, besmear next lacquer of the solder that add drill steel, heat again the temperature of a moderate and heat preservation is certain time pledges with eliminating volatile. In vacuum furnace (vacuum is spent 1.
333 × 10-2Pa) or dry type heats to be controlled to 1100 ℃ in hydric furnace, heat preservation 1 hour, drill rod solder while the exterior metallization of the diamond that finish. Makings of Ni-Cr alloy drill steel was used to realize drill rod solder as much in a few patent, element of Fe, B or Si, Mo still includes to wait in drill rod makings. For example, in document  in use the material of Ni-Cr alloy drill steel that contains Si or Si and Ti to realize drill rod solder in vacuum furnace, temperature of drill rod solder is 1126 ～ 1176 ℃ ; Document  use Cu radical to contain W, Fe, Cr, B, Si to wait for emery wheel of diamond of solder of drill rod of drill rod makings; Document  with Ag-Mn-Zr stuff of silver radical drill rod comes tool of diamond of drill rod solder, replace thereby eletroplate tool. Used the band that drill rod of nickel radical active expects and stuff of nickel radical drill rod realizes diamond and matrix German A Trenker respectively in process of drill rod solder. By with eletroplate the comparative figure of the tool can see, more aureate than report firm manson provides the performance of tool of diamond of solder of high temperature drill rod exceedingly good much, drill rod solderer is provided (diamond of makings of use active drill rod and PDA989, PDA665) initiative grinding function is to eletroplate tool (makings of nickel radical drill rod and PDA665 diamond) 3.
5 times above, life is to eletroplate the 3 times above of the tool; Because drill rod solderer has the larger space that hold bit, bead of King Kong stone mill has bigger free cutting side and grind the space between bead more, make cut bits to be eliminated very easily, the grinding performance of tool of diamond of drill rod solder is so good. (2) the 4th Military Medical University and Xi'an traffic university are in the research state of tool of diamond of solder of drill rod of domestic high temperature on the foundation that diamond of solder of domestic and international drill rod studies, use vacuum heat (vacuum is spent for 0.
2Pa) inside the method of solder of high temperature drill rod, it is drill rod makings with NiCr13P9 alloy, match with a few Cr pink, in high temperature (950 ℃ ) pressurization (4.
9MPa) drill rod solder undertakes below the condition, realized the firm union between diamond and steel matrix thereby. Drill rod makings distributings equably surface of Yu Sha annulus, diamond already by solder of firm drill rod, surface of feeling emery wheel feels quite keen and coarse. Drill rod makings distributings between bead of King Kong stone mill even, diamond gives blade height tall. Its durability relatively eletroplate emery wheel had rise apparently, working hind is only a few diamond fall off. The Xiao Bing of Nanjing aerospace university method that uses solder of drill rod of high frequency induction, make intermediate layer material jointly with Ag-Cu alloy and Cr pink, in solder of drill rod of the induction in air 35 seconds, temperature of drill rod solder 780 ℃ , realized the firm union between diamond and steel matrix. Yao Zhengjun use the method that enrages solder of drill rod of the induction in protecting furnace in Ar, do drill rod to expect with Ni-Cr alloy powder, solder of vacuum induction drill rod 30 seconds, temperature of drill rod solder 1050 ℃ , realized the firm link of diamond and steel matrix. Use scanning report lens and X ray can chart appearance, combine analysis of structure of X ray diffraction, discovery forms rich Cr layer in interface of diamond of element of the Cr in process of drill rod solder and with the C element of diamond surface reaction generates Cr3C2 and Cr7C3, this is the main factor that realizes alloy layer and diamond to have taller union strength. Grinding experiment is used cut feed of deep, delay, heavy load to undertake greatly, from the point of the exterior form appearance after emery wheel grinding, fall off without diamond is whole, stone mill bead belongs to King Kong to wear away normally, demonstrative diamond has taller domination intensity, agree with efficient grinding treatment. Company of Taiwan China emery wheel (KNIK.
Inc) roll out monolayer all a string of beads of solder of drill rod of cloth diamond high temperature, below the requirement that does not lower its life, diamond dosage decreases 50% , cut rate rises 2 times. The author is in task group to be on the foundation that studies domestic and internationally, employ Ni82CrBSi alloy piece makings of state drill steel, diamond discharges cloth to expect in drill rod equably piece on, drill rod solder comes true in sintering furnace of low vacuum hot pressing, had preliminary research to tool of diamond of drill rod solder, and explore how drill rod solder this one technology is used at pregnant to set a tool in. From optimize diamond the dynamic parameter such as span of the static structure parameter such as granuality of the means discharging cloth in carcass, diamond, chroma and effective diamond amount, diamond sets out, implementation monolayer diamond is in the orderly platoon cloth of transverse plane, repass folds a law to be in fore-and-aft show cloth of strewn at random platoon, the diamond in realizing working layer has successive job capacity. To examine carcass sets ability to the bag of diamond, make a watch set diamond bit especially, have edge test 5 times, measure its are the most greatly give blade value on average. The test that passes diamond of pair of tool of monolayer of drill rod solder to give blade height (diamond looks for 45/50) , discovered its are the biggest value giving blade can achieve 70% above, can see, technology of drill rod solder can make the combinative strength of diamond and carcass rises greatly. To diamond bit (φ 63mm) the result that undertakes the ferroconcrete is gotten into imitate experiment makes clear, broach is getting tine to wear away still can continue to work when close 2mm, from theoretic tell already two diamond shared the work, this says palpability can come true it seems that " pregnant is set " , specific applied technology still is in further research. 3. The problem diamond that technology of drill rod solder exists in diamond tool application puts the difficult point that is in a lot of urgent need that solve when drill rod solder: ① asks drill rod expects pair of diamond and carcass have good wellability and combinative strength; The choice of material of solder of ② drill rod and craft of drill rod solder should assure the stability of diamond, be opposite with decrease or avoiding drill rod to expect of diamond erode; ③ because the difference of hot coefficient of expansion of diamond and metallic matrix is bigger, solder consequently leftover stress is greater also, reduce the intensity of contact; The melting point that ④ drill rod expects wants the working temperature of tool of prep above diamond, should search melting point so inferior the metal that is close to with diamond coefficient of expansion (alloy) material expects as drill rod, consider to join certain and active element to be mixed in order to improve to the wellability of diamond again endophilicity, achieve already can the objective that felt diamond can satisfy carcass machinery function again. In addition, metal of the implementation means of diamond surface metallization, surface matchs with what drill rod expects and the crucial technology such as the choice of gentle style medium returns choice, brazing flux need to mature further and be optimized. The use efficiency of diamond tool and life are divided depend on bead of King Kong stone mill by inlaid outside firm rate, still concern with the wearability of carcass. The metropolis such as the chroma of the distributinging condition in carcass, diamond is opposite the discretion of carcass itself intensity, diamond the wearability of carcass produces an effect, so, the condition that how makes carcass attains ideal also is the notable problem in will working henceforth. 4. Technology of solder of epilogue drill rod can realize diamond, bond (material of gold of drill rod seam) with chemistry of metallic matrix interface metallurgy is united in wedlock, have higher combinative strength. Because the combinative strength on the interface is high, need very thin bond ply to be controlled firmly with respect to enough only so wear bead, its are bare height can amount to 70% ～ 80% , make of abrasive use more sufficient, improved the life of the tool and treatment efficiency greatly. Compare with traditional technique photograph, of diamond tool allow the greatest value giving blade to be able to increase 50% above, below the requirement that be not added in the power comsumption of the tool or lowers somewhat, the diamond cost amount of material of the workpiece on unit volume reduces half above. With eletroplate tool photograph is compared, also showed incomparable advantage. Anyhow, technology of drill rod solder is having very good development perspective in diamond tool production process, answer to make this one technology realizes industrialization as soon as possible. CNC Milling CNC Machining