WO2007108058A1 - 鉄鋼部材の接合方法、鉄鋼部材からなる接合体における接合力強化方法、鉄鋼製品及びダイカスト製品 - Google Patents
鉄鋼部材の接合方法、鉄鋼部材からなる接合体における接合力強化方法、鉄鋼製品及びダイカスト製品 Download PDFInfo
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- WO2007108058A1 WO2007108058A1 PCT/JP2006/305296 JP2006305296W WO2007108058A1 WO 2007108058 A1 WO2007108058 A1 WO 2007108058A1 JP 2006305296 W JP2006305296 W JP 2006305296W WO 2007108058 A1 WO2007108058 A1 WO 2007108058A1
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- Prior art keywords
- joining
- steel members
- steel
- joined body
- joined
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 361
- 239000010959 steel Substances 0.000 title claims abstract description 361
- 238000000034 method Methods 0.000 title claims abstract description 201
- 230000002708 enhancing effect Effects 0.000 title claims description 10
- 239000000463 material Substances 0.000 claims abstract description 47
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000005304 joining Methods 0.000 claims description 260
- 238000010438 heat treatment Methods 0.000 claims description 34
- 238000005728 strengthening Methods 0.000 claims description 32
- 230000009466 transformation Effects 0.000 claims description 28
- 238000004512 die casting Methods 0.000 claims description 22
- 238000000265 homogenisation Methods 0.000 claims description 10
- 239000011261 inert gas Substances 0.000 claims description 7
- 229910001105 martensitic stainless steel Inorganic materials 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 238000000137 annealing Methods 0.000 claims 1
- 238000010791 quenching Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract 2
- 229910052804 chromium Inorganic materials 0.000 abstract 2
- 239000011651 chromium Substances 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 11
- 238000007796 conventional method Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 230000001965 increasing effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000000635 electron micrograph Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000010583 slow cooling Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/02—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a press ; Diffusion bonding
- B23K20/023—Thermo-compression bonding
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
- C21D9/505—Cooling thereof
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
- B23K2103/05—Stainless steel
Definitions
- the present invention relates to a method for joining steel members, a method for strengthening a joining force in a joined body made of steel members, a steel product, and a die-cast product.
- FIG. 7 is a flowchart for explaining a conventional method for joining steel members.
- FIG. 8 is a diagram for explaining a conventional method of joining steel members.
- the conventional method for joining steel members is to press a plurality of steel members under a predetermined pressure condition in a state where the surfaces to be joined in the plurality of steel members are in contact with each other. While heating a plurality of steel members to a temperature at which they can be joined, a joined body forming step S910 for joining the plurality of steel members to form a joined body, and by heat-treating the joined body under a predetermined temperature condition And a joining force strengthening step S920 that strengthens the joining force in the joined body (see, for example, Patent Document 1).
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-59270
- the present invention has been made to solve the above-described problems, and even when a joined body is manufactured by joining a plurality of steel members having Cr material strength to each other. It is an object of the present invention to provide a method for joining steel members capable of obtaining a high joining force. In addition, it is possible to obtain a sufficiently high joining force even when a joined body is manufactured by joining together a plurality of steel members that have Cr-containing steel material strength. The aim is to provide a method of strengthening power.
- the present invention provides a steel product manufactured by using a joined body that has been joined by such a joining method of steel members or a joined body that has been strengthened by a joining force strengthening method in a joined body that is a steel member. The porpose is to do. Still another object of the present invention is to provide a die-cast product manufactured using the die-cast die when the steel product is a die-cast die.
- the present inventor uses a conventional method for joining steel members to join a plurality of steel members made of a steel material containing Cr to each other.
- the cause is the presence of a Cr-containing passive layer on the bonding surface. Therefore, based on this knowledge, the present inventor has come up with the idea that if the Cr-containing passive layer present on the bonding surface is dissipated, the bonding force can be made sufficiently high and the above problem can be solved.
- the present invention has been completed.
- the method for joining steel members of the present invention is a method for joining steel members, in which a plurality of steel members made of a steel material containing Cr are joined to each other, and the plurality of steel parts
- the plurality of steel members are joined to each other by joining the surfaces to be joined together and heating the plurality of steel members to a first temperature at which the plurality of steel members can be joined while pressing the plurality of steel members under a predetermined pressure condition.
- a joined body forming step for forming a body, and the joined body is heated to a second temperature equal to or higher than the A transformation point in the steel material, and then it takes 10 hours or more to lower the temperature from the A transformation point to 600 ° C. By gradually cooling to a third temperature of 600 ° C.
- the Cr-containing passive layer present on the joining surface is dissipated by performing the above-described joining force strengthening step after the joined body forming step.
- the joining force can be made sufficiently high.
- the method for joining steel members of the present invention can obtain a sufficiently high joint strength even when a joined body is produced by joining a plurality of steel members that also have Cr-containing steel material strength. This is a simple method for joining steel members.
- the joined body in order to dissipate the Cr-containing passivating layer present on the joining surface and sufficiently increase the joining force, the joined body is made to have a temperature higher than the A transformation point of the steel material. It is necessary to heat to the second temperature and then gradually cool to three temperatures of 600 ° C or lower under the condition that it takes 10 hours or more to lower the A transformation point force to 600 ° C. That is, it is necessary to slowly cool the joined body under extremely slow conditions within the range of the A transformation point force of 600 ° C.
- the Cr-containing passive layer on the joint surface dissolves into the parent phase steel material in the process of transformation of the structure with slow cooling, and eventually dissipates. As a result, the joining force can be sufficiently increased.
- the second temperature is preferably in a range of 100 ° C. or higher than the A transformation point.
- the third temperature is increased under the condition that it takes 15 hours or more to decrease the temperature from the A transformation point to 600 ° C. Slow cooling is preferred.
- the third temperature is preferably 550 ° C or lower.
- the joined body may be cooled in an inert gas atmosphere after the joining force strengthening step. I like it.
- the first temperature is preferably in a range of 1000 ° C to 1100 ° C.
- the joined body is gradually cooled after the joined body forming step.
- the joined body is inserted between the joined body forming step and the joining force enhancing step. It is preferable to further include a homogenization step of heating to a fourth temperature that can make the structure of the joined body more uniform.
- a homogenization step is performed between the bonded body forming step and the bonding force enhancing step, so that a structure that is in a non-uniform state through the bonded body forming step can be obtained. Therefore, it is possible to form a joined body with higher homogeneity.
- the fourth temperature is 1000 ° C.
- ⁇ It is preferable to be in the range of 1100 ° C! /.
- the hardness of the joined body can be increased by the quenching effect.
- the planned joining surfaces of the plurality of steel members are flat surfaces.
- the arithmetic average roughness Ra on the planned joining surface is preferably 0.2 m or less.
- the joined body forming step and the joining force enhancing step may be performed in a vacuum or in an inert gas atmosphere. I prefer to do it.
- the steel material is hot mold steel, cold mold steel, or martensite.
- the steel material is hot mold steel, cold mold steel, or martensite.
- Hot mold steel, cold mold steel, or martensitic stainless steel is a steel containing Cr. Therefore, steel members having such steel material strength are joined together. When manufacturing a body, it may be difficult to obtain a sufficiently high bonding force.
- a method for strengthening a joining force in a joined body made of a steel member according to the present invention is a method in which a joined body in which a plurality of steel members containing a steel material force containing Cr are joined together is used as an A transformation point of the steel material. By heating to the above temperature and then gradually cooling to a temperature of 600 ° C or lower under the condition that it takes 10 hours or more to lower the A transformation point force to 600 ° C, it exists on the bonding surface of the bonded body. The Cr-containing passive layer is dissipated to strengthen the bonding force in the bonded body.
- the Cr-containing passivating layer existing on the joining surface is dissipated to sufficiently increase the joining force, thereby reducing Cr. Even if it is a joined body in which a plurality of steel members having the steel material strength contained are joined to each other, a sufficiently high joining force can be obtained.
- the steel product of the present invention has a joined body joined by the joining method of steel members according to any one of (1) to (16) above or the steel member force according to (17) above.
- This is a steel product manufactured using a joined body whose joining strength has been strengthened by the joining strength enhancing method for the joined body.
- the steel product of the present invention is a steel product joined with a sufficiently high joining force, It can be used for various purposes.
- Examples of steel products include various molding dies, various tools, various structural materials, and the like.
- the die-casting die of the present invention is a die-casting die manufactured using a joined body, a die-casting die having a complicated structure such as a die-casting die including a heat exchange medium flow path can be easily obtained. It becomes a die casting mold that can be manufactured. In addition, since the die casting mold of the present invention is bonded with a sufficiently high bonding force, it becomes a highly reliable and long-life die casting mold.
- the die-cast product described in (20) above is a die-cast product manufactured using the die-casting mold of the present invention.
- the die-cast product of the present invention can be manufactured easily using a die-cast mold having a complicated structure as described above, and has been manufactured using a highly reliable and long-life die-cast mold. Since it is a die-cast product, it becomes a die-cast product with high quality and low manufacturing cost.
- the method for joining steel members of the present invention is a method for joining steel members that join together a plurality of steel members having steel material strength, and is configured to abut the planned joining surfaces of the plurality of steel members, Forming a joined body by joining the plurality of steel members to form a joined body by heating the plurality of steel members to a temperature at which the plurality of steel members can be joined by magnetic heating while pressing the plurality of steel members under a predetermined pressure condition Including a process.
- a method for joining steel members of the present invention is to heat a plurality of steel members by magnetic calorie heat in the joined body forming step. It becomes possible to heat uniformly, and as a result, it is possible to manufacture a high-quality bonded body with low stress strain with high productivity.
- a method for joining steel members of the present invention is a method for joining steel members made by joining together a plurality of steel members made of a steel material. A joined body that joins the plurality of steel members to form a joined body by heating the plurality of steel members to a temperature at which the plurality of steel members can be joined while pressing the plurality of steel members under a predetermined pressure condition using a motor. It includes a forming step.
- the method for joining steel members of the present invention is to press a plurality of steel members using a servo motor in the joined body forming step. It is possible to press under a constant pressure condition, and as a result, it is possible to manufacture a high-quality joined body with low stress strain.
- FIG. 1 is a flowchart shown for explaining a method for joining steel members according to Embodiment 1.
- FIG. 2 is a view for explaining a method for joining steel members according to Embodiment 1.
- FIG. 3 is a view for explaining the method for joining steel members according to the first embodiment.
- FIG. 4 is a cross-sectional electron micrograph of a joined portion in a joined body.
- FIG. 5 is a view for explaining a method for joining steel members according to Embodiment 2.
- FIG. 6 is a diagram for explaining a method for joining steel members according to Embodiment 3.
- FIG. 7 is a flowchart shown for explaining a conventional method for joining steel members.
- FIG. 8 is a view for explaining a conventional method for joining steel members.
- Embodiment 1 is an embodiment for explaining a method for joining steel members of the present invention.
- FIG. 1 is a flow chart for explaining a method of joining steel members according to the first embodiment.
- FIG. 2 is a view for explaining the method of joining steel members according to the first embodiment.
- the horizontal axis indicates time, and the vertical axis indicates temperature.
- Fig. 3 shows steel according to Embodiment 1. It is a figure shown in order to demonstrate the joining method of a member.
- Fig. 3 (a) is a diagram showing steel members 12 and 16 to be joined
- Fig. 3 (b) is a diagram showing steel members 12 and 16 during the joined body forming step (S10).
- (c) is a view showing the joined body 10 after completion of the homogenization step (S20)
- FIG. 3 (d) is a view showing the joined body 10 after the end of the joining force strengthening step (S30).
- a method for joining steel members according to Embodiment 1 is a method for joining steel members in which a plurality of steel members made of a steel material containing Cr are joined to each other, as shown in FIG. A process (S10), a homogenization process (S20), and a joining force strengthening process (S30) are included in this order.
- the joined body forming step (S10) abuts the planned joining surfaces 14, 18 of the two steel members 12, 16 to form the two steel members 12, 16 together.
- Heating to the first temperature T for example, 1000 ⁇ : L 100 ° C (1070 ° C in Fig. 2)
- the two steel members 12, 16 can be joined while pressing under the specified pressure conditions.
- the two steel members 12 and 16 are joined to form the joined body 10.
- the pressing is performed by hydraulic pressure, for example, by the pressure of lOMPa.
- heating is performed in a vacuum furnace, and the holding time at the first temperature T is 30 minutes (see t in FIG. 2).
- the bonded body 10 is gradually cooled to room temperature.
- the bonded body 10 has a fourth temperature T (for example, 1000 to: L 100 that can make the structure of the bonded body 10 more uniform. ° C (1040 in Fig. 2
- the holding time at the fourth temperature T is 1 hour (see t in FIG. 2). Uniformization process
- the bonded body 10 is heated to a second temperature (850 ° C. in FIG. 2) equal to or higher than the A transformation point T in the steel material, and then.
- a transformation point T 850 ° C. in FIG. 2
- a third temperature T of 600 ° C or lower (Fig. 2) under the condition that it takes 10 hours or more to lower the Al 1 A1 force to 600 ° C.
- the heating is performed in a vacuum furnace at the second temperature T.
- the retention time is 2 hours (see t in Fig. 2). After finishing the bonding strength strengthening process (S30)
- the joined body 10 is cooled in an inert gas atmosphere (for example, in an N gas atmosphere).
- steel members 12, 16 having hot die steel (SDK61) force were used as the steel members.
- the steel members 12 and 16 have a cylindrical shape ( ⁇ 20mm x 20mm) as shown in Fig. 3 (a).
- the planned joining surfaces 14 and 18 of the steel members 12 and 16 are flat surfaces.
- the arithmetic average roughness Ra on the planned joining surfaces 14 and 18 of the steel members 12 and 16 is 0.1 m.
- the method for joining steel members according to the first embodiment including the steps as described above, by performing the above-described joining force strengthening step (S30) after the joined body forming step (S10), the joining surface is formed. It is possible to dissipate the existing Cr-containing passivating layer and sufficiently increase the bonding force. As a result, the method for joining steel members according to Embodiment 1 can obtain a sufficiently high joining force even when a joined body is manufactured by joining a plurality of steel members made of a steel material containing Cr. This is a method for joining steel members.
- the joined body 10 is made of steel. Heat to the second temperature above the A transformation point T of the material and then lower the A transformation point T to 600 ° C.
- the A transformation point T force is extremely slow in the range of 600 ° C.
- the Cr-containing passive layer on the joining surface dissolves in the steel material of the parent phase in the process of transformation of the structure with slow cooling. In the end, it will be dissipated and the joining force can be made sufficiently high.
- the joined body 10 is cooled in an inert gas atmosphere (for example, in an N gas atmosphere).
- the joined body forming step (S10) is completed. Since the joined body 10 is gradually cooled after the completion, it is possible to suppress the occurrence of stress distortion of the joined body 10 caused by pressurization and form a joined body with high homogeneity.
- the joined body 10 is made to have a structure of the joined body between the joined body forming step (S10) and the joining force strengthening step (S30). Since it further includes a homogenization step (S20) of heating to the fourth temperature T, which can be made more uniform,
- the joined body 10 is rapidly cooled to the Ms point after the homogenization step (S20), and then the joined body 10 is gradually cooled. Therefore, by increasing the hardness of the joined body due to the quenching effect, it is possible to form a joined body having high strength and high quality.
- the steel member is obtained by processing the scheduled joining surfaces with high accuracy. It is possible to obtain a sufficiently high joining force by increasing the degree of adhesion between steel members when they are abutted against each other.
- the arithmetic average roughness Ra on the surfaces 14 and 18 to be joined is 0.2 m or less. Since the steel members 12 and 16 can be joined in a state where the distance between the scheduled joining surfaces 14 and 18 is 0.4 m or less on average, a sufficiently high joining force can be obtained. .
- the steel members having a hot die steel (SKD61) force which is a steel material containing Cr, are joined to each other.
- SSD61 hot die steel
- Fig. 4 is a cross-sectional electron micrograph of the bonded portion of the bonded body.
- Fig. 4 (a) is a cross-sectional electron micrograph of the joined portion of the joined body 10 joined by the method of joining steel members according to Embodiment 1
- Fig. 4 (b) is a view of the steel member according to Comparative Example 1.
- Depending on the joining method 3 is a cross-sectional electron micrograph of a joined portion in a joined body (not shown).
- the method for joining steel members according to Comparative Example 1 is basically the same method for joining steel members as the method for joining steel members according to Embodiment 1, but the joined body forming step (S10) (and uniform This is different from the method for joining steel members according to Embodiment 1 in that the joining force strengthening step (S30) is not included after the forming step (S20)).
- the above-described joining force strengthening step (S30) is performed after the joined body forming step (S10), thereby existing on the joining surface. It is possible to dissipate the Cr-containing passivating layer and sufficiently increase the bonding force. As a result, the method for joining steel members according to Embodiment 1 can obtain a sufficiently high joining force even when a joined body is manufactured by joining together a plurality of steel members made of a steel material containing Cr. This is a possible method for joining steel members.
- Embodiment 2 is an embodiment for explaining a method for joining steel members of the present invention and a steel product produced by the method.
- a pressure pin used for die casting mold manufacturing will be described as an example.
- FIG. 5 is a view for explaining the method for joining steel members according to the second embodiment.
- Fig. 5 (a) is a diagram showing the steel members 22, 26 to be joined
- Fig. 5 (b) is a diagram showing the steel members 22, 26 in the joined body forming step (S10).
- c) is a view showing the joined body 20 after the end of the homogenization step (S20)
- FIG. 5 (d) is a view showing the joined body 20 after the end of the joining force strengthening step (S30).
- the method for joining steel members according to the second embodiment is basically the same method as the method for joining steel members according to the first embodiment, but the method for joining the steel members according to the first embodiment is to be joined. It is different from the case of. That is, in the method for joining steel members according to Embodiment 2, as shown in FIG. 5 (a), steel members 22 and 26 cut into a predetermined shape by NC cutting are used as joining objects. As a steel member, the steel member according to Embodiment 1 is used. Similar to the joining method, hot mold steel (SDK61) is used.
- the method for joining steel members according to the second embodiment is different from the method for joining steel members according to the first embodiment, but the method for joining steel members according to the first embodiment.
- the bonding strength strengthening step (S30) described above is performed after the bonded body formation step (S10), the Cr-containing passive layer existing on the bonding surface is dissipated to ensure sufficient bonding strength. It becomes possible to make it high.
- the method for joining steel members according to Embodiment 2 obtains a sufficiently high joining force even when a joined body is manufactured by joining together a plurality of steel members that also have Cr material strength. This is a method for joining steel members.
- Embodiment 3 is an embodiment for explaining a method for joining steel members of the present invention and a steel product produced by the method.
- a die casting mold will be described as an example.
- FIG. 6 is a view for explaining the method of joining steel members according to the third embodiment.
- Fig. 6 (a) is a diagram showing the steel members 32, 36 to be joined
- Fig. 6 (b) is a diagram showing the steel members 32, 36 in the joined body forming step (S10).
- FIG. 6 (d) is a diagram showing the joined body 30 after the end of the joining force strengthening step (S30).
- the method for joining steel members according to the third embodiment is basically the same method as the method for joining steel members according to the first embodiment, but the method for joining the steel members according to the first embodiment is to be joined. It is different from the case of. That is, in the method for joining steel members according to Embodiment 3, as shown in FIG. 6 (a), the heat exchange medium flow path forming grooves 42, 44 were formed in the planned joining surfaces as shown in FIG. Steel members 32 and 36 are used. Implemented as a steel member Similar to the method of joining steel members according to Form 1, hot die steel (SDK61) is used.
- SDK61 hot die steel
- the method for joining steel members according to Embodiment 3 is different from the method for joining steel members according to Embodiment 1, but the method for joining steel members according to Embodiment 1 is different.
- the bonding strength strengthening step (S30) described above is performed after the bonded body formation step (S10), the Cr-containing passive layer existing on the bonding surface is dissipated to ensure sufficient bonding strength. It becomes possible to make it high.
- the method for joining steel members according to Embodiment 3 obtains a sufficiently high joining force even when a joined body is manufactured by joining together a plurality of steel members that also have Cr-containing steel material strength. This is a method for joining steel members.
- the joined body 30 is subjected to cutting so as to have a desired shape. In this manner, the die casting mold 50 having the heat exchange medium flow path 40 inside can be manufactured.
- the die casting mold 50 according to Embodiment 3 since the die casting mold 50 according to Embodiment 3 is bonded with a sufficiently high bonding force, it becomes a highly reliable and long-life die casting mold (in the experiment, the lifetime is 100 times or more). ) O For this reason, the die-cast product manufactured using the die-casting die 50 is a die-cast product with high quality and low manufacturing cost.
- a portion of the joined body 30 having a joining surface force exposed to the outside of at least 2 mm is removed.
- the A transformation point T force is 600 ° C or less under the condition that it takes 10 hours or more to lower the temperature to 600 ° C.
- the Cr-containing passive layer existing on the joint surface of the joined body is dissipated to strengthen the joining force in the joined body.
- a sufficiently high joining force can be obtained when a joined body is manufactured by joining a plurality of steel members made of a steel material containing Cr.
- the bonded body forming step (S10), the homogenizing step (S20), and the bonding force strengthening step (S30) are performed in a vacuum. It is not limited to. For example, these processes are performed in an inert gas atmosphere such as N gas or Ar gas.
- the force when the joined body forming step (S10) is performed by external heating using a vacuum furnace.
- the present invention is not limited to this.
- it can be performed by external heating using a heating furnace other than a vacuum furnace, energization heating, or magnetic heating.
- magnetic heating it becomes possible to heat a plurality of steel members at high speed and uniformly, and as a result, it is possible to manufacture a high-quality joined body with low stress strain with high productivity. .
- the method of performing the joined body forming step (S10) by magnetic heating is also applicable to a method of joining steel members in which a plurality of steel members made of a steel material not containing Cr are joined together.
- the plurality of steel members are heated while pressing the plurality of steel members by hydraulic pressure, but the present invention is not limited to this.
- a plurality of steel members are pressed using a servo motor under predetermined pressure conditions. It is also possible to heat the steel member. This makes it possible to press a plurality of steel members under a certain pressure condition, and as a result, it is possible to manufacture a high-quality joined body with low stress strain.
- the method of pressing the steel member using the servo motor in the joined body forming step (S10) is a method of joining steel members, which do not contain Cr, and join a plurality of steel members having steel material strength to each other. The method can also be applied.
- the present invention is not limited to this.
- the A transformation point T force is also lowered to 600 ° C.
- it may be gradually cooled under a condition that takes 15 hours or more or 20 hours or more. This makes it possible to further sufficiently dissipate the Cr-containing passive layer present on the joint surface and further increase the joint force.
- the force using steel for hot mold (SKD61) as the steel material is not limited to this.
- hot mold steel other than SKD61 cold mold steel, high-speed tool steel, or martensitic stainless steel can be used. Even a steel member having such a steel material strength can be joined with a sufficiently high joining force.
- a cylindrical joined body, a pressure pin, or a die casting mold is manufactured as the steel product, but the present invention is not limited to this.
- steel products include various molding dies, various tools, and various structural materials.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008506074A JP4294081B2 (ja) | 2006-03-16 | 2006-03-16 | 鉄鋼部材の接合方法、鉄鋼部材からなる接合体における接合力強化方法、鉄鋼製品の製造方法及びダイカスト製品の製造方法 |
PCT/JP2006/305296 WO2007108058A1 (ja) | 2006-03-16 | 2006-03-16 | 鉄鋼部材の接合方法、鉄鋼部材からなる接合体における接合力強化方法、鉄鋼製品及びダイカスト製品 |
US12/293,225 US20090120535A1 (en) | 2006-03-16 | 2006-03-16 | Method of bonding steel members, method of enhancing bonding strength of united body formed of steel members, steel product, and die-cast product |
CN2006800537975A CN101400473B (zh) | 2006-03-16 | 2006-03-16 | 钢铁构件的接合方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2006/305296 WO2007108058A1 (ja) | 2006-03-16 | 2006-03-16 | 鉄鋼部材の接合方法、鉄鋼部材からなる接合体における接合力強化方法、鉄鋼製品及びダイカスト製品 |
Publications (1)
Publication Number | Publication Date |
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WO2007108058A1 true WO2007108058A1 (ja) | 2007-09-27 |
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Family Applications (1)
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PCT/JP2006/305296 WO2007108058A1 (ja) | 2006-03-16 | 2006-03-16 | 鉄鋼部材の接合方法、鉄鋼部材からなる接合体における接合力強化方法、鉄鋼製品及びダイカスト製品 |
Country Status (4)
Country | Link |
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US (1) | US20090120535A1 (ja) |
JP (1) | JP4294081B2 (ja) |
CN (1) | CN101400473B (ja) |
WO (1) | WO2007108058A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012165414A1 (ja) | 2011-05-31 | 2012-12-06 | 株式会社 旭 | 成形装置及び成形製品の製造方法 |
Citations (2)
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JPS62170419A (ja) * | 1986-01-22 | 1987-07-27 | Sumitomo Metal Ind Ltd | クリ−プ強度の良好な溶接継手の製造方法 |
JP2005262244A (ja) * | 2004-03-17 | 2005-09-29 | Suwa Netsukogyo Kk | パルス通電による金属部材の接合方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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DE4209101C2 (de) * | 1992-03-20 | 1994-05-19 | Krupp Ag Hoesch Krupp | Verfahren zum Verbinden von Sphärogußteilen mit Stahl oder Stahlguß |
US5599408A (en) * | 1992-09-04 | 1997-02-04 | Mitsubishi Jukogyo Kabushiki Kaisha | Method of producing a structural member |
JP3752830B2 (ja) * | 1998-03-31 | 2006-03-08 | マツダ株式会社 | 接合金属部材及び該部材の接合方法 |
JP3548509B2 (ja) * | 2000-06-07 | 2004-07-28 | 諏訪熱工業株式会社 | パルス通電接合方法及び接合装置並びに接合体 |
US6676777B2 (en) * | 2001-03-02 | 2004-01-13 | National Institute For Materials Science | Postweld heat treatment process of carbon steel and low alloy steel |
JP4009124B2 (ja) * | 2002-03-28 | 2007-11-14 | 新日本製鐵株式会社 | 長時間クリープ特性に優れた高強度低Crフェライト系ボイラ用鋼管およびその製造方法 |
-
2006
- 2006-03-16 CN CN2006800537975A patent/CN101400473B/zh active Active
- 2006-03-16 JP JP2008506074A patent/JP4294081B2/ja active Active
- 2006-03-16 US US12/293,225 patent/US20090120535A1/en not_active Abandoned
- 2006-03-16 WO PCT/JP2006/305296 patent/WO2007108058A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62170419A (ja) * | 1986-01-22 | 1987-07-27 | Sumitomo Metal Ind Ltd | クリ−プ強度の良好な溶接継手の製造方法 |
JP2005262244A (ja) * | 2004-03-17 | 2005-09-29 | Suwa Netsukogyo Kk | パルス通電による金属部材の接合方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012165414A1 (ja) | 2011-05-31 | 2012-12-06 | 株式会社 旭 | 成形装置及び成形製品の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
CN101400473A (zh) | 2009-04-01 |
JP4294081B2 (ja) | 2009-07-08 |
US20090120535A1 (en) | 2009-05-14 |
JPWO2007108058A1 (ja) | 2009-07-30 |
CN101400473B (zh) | 2012-07-18 |
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