CN103386417A - Method for producing hard alloy product by metallurgical bonding - Google Patents
Method for producing hard alloy product by metallurgical bonding Download PDFInfo
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- CN103386417A CN103386417A CN2013103248470A CN201310324847A CN103386417A CN 103386417 A CN103386417 A CN 103386417A CN 2013103248470 A CN2013103248470 A CN 2013103248470A CN 201310324847 A CN201310324847 A CN 201310324847A CN 103386417 A CN103386417 A CN 103386417A
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Abstract
The invention discloses a method for realizing the purpose of producing a transition layer-free hard alloy product by taking the metallurgical bonding technology and taking a hard alloy blank as a basis. The method successively comprises the following steps of: A. preparing two different or same hard alloys of which the bonding phase percentage by weight is 8-30% as blanks with a conventional method; B. carrying out finish machining on a surface, to be subjected to metallurgical bonding, of each hard alloy blank, wherein the degree of finish is less than or equal to Ra0.04mm, and carrying out conventional processing to the rest part; C. cleaning the surface, to be subjected to metallurgical bonding, of each blank, and coating one layer of acetone; D. assembling; and E. putting the assembled blanks into a vacuum furnace, carrying out vacuum metallurgical bonding thermal processing at the temperature of 1200-1450DEG C for 1-1.5h, wherein the vacuum degree is less than or equal to 0.8Pa, and cooling to obtain the metallurgical bonding transition layer-free hard alloy product. According to the method disclosed by the invention, the defect of roll collar use invalidation due to different thermal stress and expansion coefficients in the bonding or welding process of hard alloy and steel material in the prior art is overcome, and the method is especially suitable for producing large products.
Description
Technical field
The invention belongs to the production method of hard metal article, relate in particular to a kind of technology of metallurgical bond method production without the hard metal article of transition zone that adopt.
Background technology
Tradition hart metal product such as hard alloy roll, do hard phase by the insoluble metal compound, and Binder metal is done Binder Phase, adopts powder metallurgy process to produce.Development along with the shape rolling technique, the expansion of application, especially to rolling large-size large scale bar, wire rod, tubing etc., the hard alloy roll size that requires is increasing, traditional powder metallurgy process is due to the restriction that is subjected to former, agglomerating plant, and the production of Large scale alloy collars exists makes the disadvantage difficult, that production cost is high.A kind of composite roll outer shroud that generally uses in the market adopts carbide alloy, and internal layer adopts the high-strength steel material, adopts the binding agent bonding synthetic between ectonexine.Patent No. ZL00207309.9, denomination of invention are that CN1389320A, name are called " a kind of manufacturing process of compoiste adhering hard alloy roll " for " compoiste adhering hard alloy roll " and follow-up patent of invention publication number thereof, and patent publication No. is that CN100393434C, name are called the i.e. technology for this reason of " production method of hard alloy compound roller ring " disclosed roll.This type of technology is all by being bonded together by organic gel or welding body between carbide alloy and steel matter, there is obvious transition zone, although the collars that the method is produced has certain intensity, for the use that improves carbide roll ring, larger impetus is arranged, but because the material of bonded part is inconsistent, or have an obvious weld layer, have easily that thermal stress is inhomogeneous, the thermal coefficient of expansion of material different and lost efficacy in causing the collars use procedure in use procedure.
Summary of the invention
The objective of the invention is for the defect that exists in prior art, a kind of metallurgical bond technology that adopts of research and design realizes producing take the carbide alloy base substrate as basis the method for hard metal article, for the production of especially big hard metal article,, without transition zone, the thermal stress that exists in carbide alloy and steel matter bonding or welding process in the prior art and the coefficient of expansion have been overcome different and cause collars to use the defect that lost efficacy on product structure.
Metallurgical bond of the present invention is produced the method for hard metal article, comprises the following steps successively:
A, idiosome processed: prepare the Binder Phase percentage by weight and be two identical or different carbide alloy of 8%～30% as idiosome;
B, base substrate machined: with the metallurgical bond face of the treating fine finishining of carbide alloy base substrate, fineness≤Ra0.04mm, remainder carry out conventional machining to be processed;
C, surface treatment: the metallurgical bond face for the treatment of to base substrate carries out cleaning, requires without soot particle and foreign material, then with to be bonded upper one deck acetone that applies;
D, assembling: the treating that the metallurgical bond face is upper and lower and be stacked together of two base substrates after processing, and be placed on all wares, the base substrate that volume or weight is large is placed on bottom;
E, metallurgical bond: will assemble base substrate be placed in vacuum drying oven, carry out vacuum metallurgy bonding heat treatment 1～1.5 hour at 1200 ℃～1450 ℃ temperature, vacuum≤0.8Pa, namely obtain the hard metal article without transition zone of metallurgical bond after cooling.
The heat treatment of described vacuum metallurgy bonding can directly be heated to 1200 ℃～1450 ℃ to be carried out, and perhaps adopts two sections heating-up temperatures to complete; The heating-up temperature first of its two sections heating-up temperatures is 1200 ℃～1280 ℃, is incubated 0.5～1 hour, then is warmed up to 1350 ℃～1450 ℃, is incubated 0.5～1 hour.
Described Binder Phase is cobalt and/or nickel.
The present invention is due to the carbide alloy base substrate that adopts Binder Phase (combination of cobalt, nickel or cobalt nickel) percentage by weight 8～30%, in pyrometallurgy bonding heat treatment process, the Binder Phase volume content nearly reaches 20～50%, under the environment of high vacuum, WC and Binder Phase wettability are very good, separate out by phase counterdiffusion and dissolving, make adhesive surface form a seamless integral body, its intensity and properties are close to base substrate.
Description of drawings
Fig. 1 is idiosome assembling schematic diagram of the present invention;
Fig. 2-Fig. 8 be respectively embodiment of the present invention 1-7 the metallographic structure figure of metallurgical bond carbide alloy.
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Embodiment 1: take the large roll of metallurgical bond carbide alloy of specification Φ 340 * Φ 240 * 250mm as example.
At first preparing Binder Phase by prior art is that pure cobalt and percentage by weight are that two carbide roll rings of 30% are stand-by as idiosome, and its concrete size is respectively Φ 341 * Φ 239 * 84mm, Φ 341 * Φ 239 * 168mm.
Then carry out the base substrate machined: with the metallurgical bond face of the treating fine finishining of carbide alloy base substrate, fineness Ra0.02mm, remainder carry out conventional machining to be processed; Finished size is respectively Φ 340 * Φ 240 * 83.5mm, Φ 340 * Φ 240 * 166.5mm.
Then carry out surface treatment: the metallurgical bond face for the treatment of to base substrate carries out cleaning, can carry out with clean sponge adhesional wetting absolute alcohol, requires without soot particle and foreign material after processing, then with to be bonded upper one deck acetone that applies; (following examples are identical)
Start assembling: as shown in Figure 1, two base substrates with after processing, by treating upper and lower coaxial being stacked together of metallurgical bond face, and be placed on all wares, and the base substrate that is of a size of Φ 341 * Φ 239 * 168mm is placed on bottom; For preventing the movement in the base substrate transfer process, and the distortion of sintering process, be placed with the graphite fuse in the middle of two base substrates.(following examples are identical)
Carry out metallurgical bond: will assemble base substrate be placed in vacuum drying oven, vacuum drying oven was warmed up to 1200 ℃ in 3 hours, was incubated 0.5 hour; Then be raised to 1350 ℃ in 0.5 hour, keep cooling after 0.5 hour, vacuum requirement≤0.8Pa in whole intensification and insulating process, and in whole process, the equipment operation vacuumizes, namely obtain after cooling metallurgical bond without the transition zone carbide roll ring, be of a size of Φ 340 * Φ 240 * 250mm.Its metallographic structure as shown in Figure 2, is known and is shown on product structure without transition zone in figure.
Embodiment 2: take the large roll of metallurgical bond carbide alloy of specification Φ 380 * Φ 220 * 270mm as example.
At first preparing Binder Phase by prior art is that cobalt and nickel and percentage by weight are that two carbide roll rings of 25% are stand-by as idiosome, and its concrete size is respectively Φ 380 * Φ 219 * 91mm, Φ 380 * Φ 219 * 182mm.
Then carry out the base substrate machined: with the metallurgical bond face of the treating fine finishining of carbide alloy base substrate, fineness Ra0.02mm, remainder carry out conventional machining to be processed; Finished size is respectively Φ 380 * Φ 220 * 90mm, Φ 380 * Φ 220 * 180mm.
Then carry out surface treatment;
Then start assembling: as shown in Figure 1, two base substrates with after processing, by treating upper and lower coaxial being stacked together of metallurgical bond face, and be placed on all wares, and the base substrate that is of a size of Φ 380 * Φ 219 * 182mm is placed on bottom.
Carry out metallurgical bond: will assemble base substrate be placed in vacuum drying oven, vacuum drying oven was warmed up to 1280 ℃ in 3 hours, was incubated 0.5 hour; Then be raised to 1380 ℃ in 0.5 hour, keep cooling after 1.0 hours, vacuum requirement≤0.8Pa in whole intensification and insulating process, and in whole process, the equipment operation vacuumizes, namely obtain after cooling metallurgical bond without the transition zone carbide roll ring, be of a size of Φ 380 * Φ 220 * 270mm.Its metallographic structure as shown in Figure 3, is known and is shown on product structure without transition zone in figure.
Embodiment 3: take the metallurgical bond cemented carbide cirque of specification Φ 270 * φ 150 * 50mm as example.
At first prepare by prior art that Binder Phase is that pure nickel and percentage by weight are 18%, Binder Phase is cobalt and nickel and percentage by weight are that two cemented carbide cirques of 18% are stand-by as idiosome, its concrete size is respectively Φ 270 * φ 149 * 21mm, Φ 270 * φ 149 * 31mm.
Then carry out the base substrate machined: with the metallurgical bond face of the treating fine finishining of carbide alloy base substrate, fineness Ra0.02mm, remainder carry out conventional machining to be processed; Finished size is respectively Φ 270 * φ 150 * 20mm, Φ 270 * φ 150 * 30mm.
Then carry out surface treatment;
Then start assembling: as shown in Figure 1, two base substrates with after processing, by treating upper and lower coaxial being stacked together of metallurgical bond face, and be placed on all wares, and the base substrate that is of a size of Φ 270 * φ 150 * 30mm is placed on bottom.
Carry out metallurgical bond: will assemble base substrate be placed in vacuum drying oven, vacuum drying oven was warmed up to 1280 ℃ in 3 hours, was incubated 1.0 hours; Then be raised to 1410 ℃ in 0.5 hour, keep cooling after 1.0 hours, vacuum requirement≤0.8Pa in whole intensification and insulating process, and in whole process, the equipment operation vacuumizes, namely obtain the metallurgical bond carbide roll ring after cooling, be of a size of Φ 270 * φ 150 * 50mm.Its metallographic structure as shown in Figure 4, is known and is shown on product structure without transition zone in figure.
Embodiment 4: take the metallurgical bond cemented carbide cirque of specification Φ 250 * φ 150 * 60mm as example.
At first by prior art prepare Binder Phase be pure cobalt and percentage by weight be 15% and Binder Phase be that cobalt and nickel and percentage by weight are each of 15% cemented carbide cirque, stand-by as base substrate, its concrete size is respectively Φ 250 * φ 149 * 21mm, Φ 250 * φ 149 * 41mm.
Then carry out the base substrate machined: with the metallurgical bond face of the treating fine finishining of carbide alloy base substrate, fineness Ra0.02mm, remainder carry out conventional machining to be processed; Finished size is respectively Φ 250 * φ 150 * 20mm, Φ 250 * φ 150 * 40mm.
Then carry out surface treatment;
Then start assembling: as shown in Figure 1, two base substrates with after processing, by treating upper and lower coaxial being stacked together of metallurgical bond face, and be placed on all wares, and the base substrate that is of a size of Φ 250 * φ 150 * 40mm is placed on bottom.
Carry out metallurgical bond: will assemble base substrate be placed in vacuum drying oven, vacuum drying oven was warmed up to 1280 ℃ in 3 hours, was incubated 0.5 hour; Then be raised to 1420 ℃ in 0.5 hour, keep cooling after 1.0 hours, vacuum requirement≤0.8Pa in whole intensification and insulating process, and in whole process, the equipment operation vacuumizes, namely obtain the metallurgical bond carbide roll ring after cooling, be of a size of Φ 250 * φ 150 * 60mm.Its metallographic structure as shown in Figure 5, is known and is shown on product structure without transition zone in figure.
Embodiment 5: take specification 180 * 100 * 20mm metallurgical bond hard alloy plates as example.
At first preparing Binder Phase by prior art is that pure nickel and percentage by weight are that each of 10% hard alloy plates is stand-by, and its concrete size is respectively 180 * 100 * 12.5mm, 180 * 100 * 8.5mm
Then carry out the base substrate machined: with the metallurgical bond face of the treating fine finishining of carbide alloy base substrate, fineness Ra0.02mm, remainder carry out conventional machining to be processed; Finished size is respectively 200 * 120 * 12mm, 200 * 120 * 8mm.
Then carry out surface treatment;
Then start assembling: as shown in Figure 1,, with two base substrates after processing, by treating that the upper and lower center of metallurgical bond face is overlapping, four limit alignment are stacked together, and be placed on all wares, the base substrate that is of a size of Φ 200 * Φ 120 * 12mm is placed on bottom.
Carry out metallurgical bond: will assemble base substrate be placed in vacuum drying oven, vacuum drying oven was warmed up to 1280 ℃ in 3 hours, was incubated 0.5 hour; Then be raised to 1440 ℃ in 0.5 hour, keep cooling after 1.0 hours, vacuum requirement≤0.8Pa in whole intensification and insulating process, and in whole process, the equipment operation vacuumizes, namely obtain the metallurgical bond carbide roll ring after cooling, be of a size of 180 * 100 * 20mm.Its metallographic structure as shown in Figure 6, is known and is shown on product structure without transition zone in figure.
Embodiment 6: take specification Φ 180 * φ 120 * 60mm metallurgical bond cemented carbide cirque as example.
At first preparing Binder Phase by prior art is that pure cobalt and percentage by weight are that 8% two of cemented carbide cirques are stand-by, and its concrete size is respectively Φ 180 * φ 119 * 21mm, Φ 180 * φ 119 * 41mm.
Then carry out the base substrate machined: with the metallurgical bond face of the treating fine finishining of carbide alloy base substrate, fineness Ra0.04mm, remainder carry out conventional machining to be processed; Finished size is respectively Φ 180 * φ 120 * 20mm, Φ 180 * φ 120 * 40mm.
Then carry out surface treatment;
Then start assembling: as shown in Figure 1, two base substrates with after processing, by treating upper and lower coaxial being stacked together of metallurgical bond face, and be placed on all wares, and the base substrate that is of a size of Φ 180 * φ 120 * 40mm is placed on bottom.
Carry out metallurgical bond: will assemble base substrate be placed in vacuum drying oven, vacuum drying oven was warmed up to 1280 ℃ in 3 hours, was incubated 0.5 hour; Then be raised to 1450 ℃ in 0.5 hour, keep cooling after 1.0 hours, vacuum requirement≤0.8Pa in whole intensification and insulating process, and in whole process, the equipment operation vacuumizes, namely obtain the metallurgical bond carbide roll ring after cooling, be of a size of Φ 250 * φ 150 * 60mm.Its metallographic structure as shown in Figure 7, is known and is shown on product structure without transition zone in figure.
Embodiment 7: take the large roll of specification Φ 200 * φ 120 * 60mm metallurgical bond carbide alloy as example.
At first preparing Binder Phase by prior art is that cobalt and nickel and percentage by weight are that two carbide roll ring base substrates of 8% and 30% are stand-by, and its concrete size is respectively Φ 200 * Φ 119 * 21mm, Φ 200 * Φ 119 * 41mm.
Then carry out the base substrate machined: with the metallurgical bond face of the treating fine finishining of carbide alloy base substrate, fineness Ra0.04mm, remainder carry out conventional machining to be processed; Finished size is respectively Φ 200 * Φ 120 * 19.5mm, Φ 200 * Φ 120 * 40.5mm.
Then carry out surface treatment;
Then start assembling: as shown in Figure 1, two base substrates with after processing, by treating upper and lower coaxial being stacked together of metallurgical bond face, and be placed on all wares, and the base substrate that is of a size of Φ 200 * Φ 120 * 40.5mm is placed on bottom.
Carry out metallurgical bond: will assemble base substrate be placed in vacuum drying oven, vacuum drying oven was warmed up to 1400 ℃ in 3 hours, be incubated cooling after 1.5 hours, vacuum requirement≤0.8Pa in whole intensification and insulating process, and in whole process, the equipment operation vacuumizes, namely obtain the metallurgical bond carbide roll ring after cooling, be of a size of Φ 200 * φ 120 * 60mm.Its metallographic structure as shown in Figure 8, is known and is shown on product structure without transition zone in figure.
Claims (3)
1. a metallurgical bond is produced the method for hard metal article, comprises the following steps successively:
A, idiosome processed: prepare the Binder Phase percentage by weight and be two identical or different carbide alloy of 8%～30% as idiosome;
B, base substrate machined: with the metallurgical face fine finishining for the treatment of of carbide alloy base substrate, fineness≤Ra0.04mm, remainder carry out conventional machining to be processed;
C, surface treatment: the metallurgical face for the treatment of to base substrate carries out cleaning, requires without soot particle and foreign material, then will treat on face to apply one deck acetone;
D, assembling: the treating that metallurgical face is upper and lower and be stacked together of two base substrates after processing, and be placed on all wares, the base substrate that volume or weight is large is placed on bottom;
E, metallurgy: will assemble base substrate be placed in vacuum drying oven, carried out vacuum metallurgy heat treatment 1～1.5 hour at 1200 ℃～1450 ℃ temperature, vacuum≤0.8Pa, namely obtain the metallurgical hard metal article without transition zone after cooling.
2. produce the method for hard metal article by metallurgical bond claimed in claim 1, it is characterized in that: described vacuum metallurgy heat treatment can directly be heated to 1200 ℃～1450 ℃ to be carried out, and perhaps adopts two sections heating-up temperatures to complete; The heating-up temperature first of its two sections heating-up temperatures is 1200 ℃～1280 ℃, is incubated 0.5～1 hour, then is warmed up to 1350 ℃～1450 ℃, is incubated 0.5～1.5 hour.
3. produce the method for hard metal article by metallurgical bond claimed in claim 1, it is characterized in that: described bonding be mutually cobalt and/or nickel.
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Cited By (3)
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| CN103817150A (en) * | 2014-02-26 | 2014-05-28 | 湖南天益高技术材料制造有限公司 | Gradient-structure hard alloy roll collar and manufacturing process thereof |
| CN109079146A (en) * | 2018-08-29 | 2018-12-25 | 株洲硬质合金集团有限公司 | A kind of preparation method of hard alloy long cylinder |
| CN109692962A (en) * | 2018-12-29 | 2019-04-30 | 武汉新锐合金工具有限公司 | A kind of hard alloy thin-wall part production technology |
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| CN103817150A (en) * | 2014-02-26 | 2014-05-28 | 湖南天益高技术材料制造有限公司 | Gradient-structure hard alloy roll collar and manufacturing process thereof |
| CN109079146A (en) * | 2018-08-29 | 2018-12-25 | 株洲硬质合金集团有限公司 | A kind of preparation method of hard alloy long cylinder |
| CN109692962A (en) * | 2018-12-29 | 2019-04-30 | 武汉新锐合金工具有限公司 | A kind of hard alloy thin-wall part production technology |
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Application publication date: 20131113 |