JP2007222934A - Method for producing clad material for aluminum bearing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the shape precision of a clad material in a thickness direction or width direction in a method for producing the clad plate to be used for the material for forming an aluminum bearing by joining an aluminum material and a steel material. <P>SOLUTION: The aluminum material and the steel material are rolled and pressure-welded, secondary rolling for increasing the shape precision in the thickness direction of the clad material between the aluminum material and the steel material is performed, and thereafter, heat treatment is performed. Alternatively, the clad material is divided into a plurality of parts in a width direction, and thereafter, heat treatment is performed. Alternatively, the clad material is divided into a plurality of parts in a width direction, then, secondary rolling and drawing are performed, and, finally, heat treatment is performed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a clad material which is a material for forming an aluminum bearing by joining an aluminum material and a steel material.

Conventionally, a clad material for an aluminum bearing has been rolled and pressed at a high rolling reduction rate by continuously feeding an aluminum material rolled into a plate shape after continuous casting and a plate-shaped steel material (strip steel plate) to a roll rolling mill. can get. In the clad material obtained by this rolling pressure welding, it is then indispensable to perform annealing in order to increase the toughness of the aluminum material and increase the adhesive strength between the aluminum material and the steel material (for example, patents). Reference 1).
Japanese Patent Application No. 2002-38230

  Rolling pressure welding is performed by passing the material to be rolled through a roll mill. And about the clad material used for a certain kind of use, in order to adjust cross-sectional shape precision (especially thickness dimensional precision in a longitudinal direction, ie, longitudinal direction thickness dimensional precision), rolling processing after annealing (henceforth, 2 (Also called next rolling). This secondary rolling is performed by carrying out roll rolling at a rolling reduction as low as several percent once or more. However, when roll rolling is performed until a high rolling reduction is achieved in order to improve the longitudinal thickness dimensional accuracy, fatigue resistance deteriorates when a plain bearing is manufactured from the clad material.

  In addition, a clad material obtained by rolling and welding an aluminum material to a steel material is usually wide, so the clad material after annealing is divided into a plurality of parts in the width direction by a slitter. The clad material divided into a plurality of parts is then cut into a desired length and formed into strip-like clad pieces, which are bent into a semi-cylindrical shape or a cylindrical shape to form a plain bearing. However, when the clad material is divided by the slitter, a large “sag” is generated at the cut end by the slitter, so that a cutting process for removing the “sag” portion later is required, which causes a decrease in productivity.

  The present invention has been made in view of the above circumstances, and its object is to improve the cross-sectional shape accuracy (longitudinal thickness dimensional accuracy and / or width direction shape accuracy) without causing a reduction in productivity. An object of the present invention is to provide a method for producing a cladding material for an aluminum bearing that can be manufactured.

Secondary rolling is performed in order to improve the shape accuracy (particularly the longitudinal thickness accuracy) of the clad material. For this purpose, it is necessary to increase the reduction ratio in this step.
However, according to the experiments of the present inventors, when the clad material obtained by rolling and welding the aluminum material and the steel material is annealed and then subjected to secondary rolling with a high reduction rate, the fatigue resistance is lowered. As a result of intensive studies in order to investigate the reason for this fatigue resistance reduction, the present inventor has obtained the following conclusion.

  In the case of producing a clad material, the aluminum material and steel material joined by rolling pressure welding are then heat treated, for example, annealed, so that metal atoms diffuse into the counterpart material from mechanical bonds. The bond strength is increased due to the change to a proper bond. However, conventionally, secondary rolling for improving the longitudinal thickness dimensional accuracy is performed as a post-annealing process. When secondary rolling is performed after annealing as described above, a force that shifts the bonding position acts on the aluminum material and the steel material in which the bonding positions of the metal atoms are determined by annealing. As a result, the bond of metal atoms is broken and the bond strength, that is, the adhesion force (adhesion strength) between the aluminum material and the steel material is reduced. This reduction in bonding force impairs fatigue resistance when manufactured as a sliding bearing. The above is the reason why the fatigue resistance of the sliding bearing is lowered when the secondary rolling for improving the longitudinal thickness dimensional accuracy is performed up to the high-pressure reduction rate in the conventional cladding material manufacturing method. . For this reason, in the conventional method for producing a clad material, secondary rolling cannot be performed up to a high pressure reduction rate.

  Conventionally, when a wide clad material is divided into a plurality of pieces by a slitter, cutting is performed to remove “sagging” at the cut end of the divided clad material. If the “sag” is small, it is not necessary to perform the cutting process. Even if the cutting process is performed, the amount of cutting is small.

Although aluminum materials and steel materials tend to be softened by annealing, the present inventor has focused on the relationship between the “sagging” of the cut end and the hardness of the cladding material. As a result of the experiment, when the clad material is cut by a slitter, the sag caused by the rotating cutter of the slitter is increased in the soft material, but in the hard material, the cutting by the rotating cutter can be performed satisfactorily. I got the conclusion that “Dare” would be smaller.
The present invention has been made based on the above-described research results of the present inventors.

<Invention of Claim 1>
The invention of claim 1 is characterized in that an aluminum material and a steel material are subjected to pressure welding, and the clad material obtained by the rolling pressure welding is subjected to a rolling process for improving the thickness dimensional accuracy, followed by heat treatment. To do. The process of the invention of claim 1 is shown in FIG.

  As in the first aspect of the invention, by performing rolling (secondary rolling) to improve the shape accuracy (particularly the longitudinal thickness accuracy) of the clad material, the metal of the aluminum material and the steel material Even if the bonding position of the atoms is shifted, the aluminum material and the steel material are metallicly bonded by diffusion of metal atoms by the heat treatment performed thereafter. Therefore, in secondary rolling, even if rolling is performed to a high rolling reduction by a roll rolling mill, the metal atoms are diffused into the counterpart material by heat treatment performed after the secondary rolling, for example, annealing, and the aluminum material and the steel material are dispersed. The bond strength can be improved by making a metallic bond. For this reason, in the secondary rolling, the clad material can be passed through a rolling mill to a high pressure reduction rate, and when manufactured as a sliding bearing, its fatigue resistance is not impaired.

For example, FIGS. 5 (a) and 5 (b) show the respective parts in the longitudinal direction when the clad material before annealing is rolled to a rolling reduction of 40% and when the clad material after annealing is rolled to a rolling reduction of 8% with a roll mill. 5 (a) shows the variation in the longitudinal thickness of the clad material before annealing, and FIG. 5 (b) shows the variation in the longitudinal thickness of the clad material after annealing. This case is shown. From FIG. 5, it can be seen that when the secondary rolling can be performed to a high reduction rate by performing the secondary rolling before annealing, the dimensional accuracy of the thickness in the longitudinal direction is high.
Thus, by performing the secondary rolling before annealing, the number of rolling can be increased, that is, the secondary rolling can be performed up to the high pressure reduction rate, so that the longitudinal direction can be achieved without impairing the fatigue resistance. Thickness dimensional accuracy can be improved.

<Invention of Claim 2>
The invention of claim 2 is characterized in that an aluminum material and a steel material are rolled and pressure-welded, and the clad material obtained by the rolling pressure-welding is divided into divided clad materials having a desired width dimension by machining, and then heat-treated. . The process of the invention of claim 2 is shown in FIG.
When the width of the clad material obtained by rolling pressure welding is wider than that of the slide bearing to be manufactured, the clad material is divided into a plurality of pieces in the width direction to obtain a divided clad material. As the machining for dividing the clad material in the width direction, for example, cutting by a rotary cutter for slitter is employed. When the clad material is cut by the rotary cutter, sagging Da, Db and burrs Ea, Eb as shown in FIGS. 4A and 4B are generated at the corners of the cut end. The sagging Da and Db and the burrs Ea and Eb differ depending on the hardness of the clad material.

  In this case, conventionally, after the clad material is heat-treated, for example, annealed, that is, a slightly softened clad material is processed to be separated into a plurality of parts in the width direction, as shown in FIG. The sag Da and the burrs Ea at the corners are increased, and the cross-sectional shape accuracy (particularly the width direction shape accuracy) is degraded. Since it cannot be manufactured as a plain bearing that leaves such a large sag Da and burrs Ea, the sag Da and burrs Ea are cut off with a cutting tool. The cutting margin Wa is increased, material loss is increased, and productivity is reduced.

  However, according to the invention of claim 2, since the processing for separating the clad material into a plurality is performed before annealing, that is, for the clad material having a relatively high hardness, as shown in FIG. The sagging Db and the burrs Eb at the corners of the end can be reduced, and the shape accuracy in the width direction can be improved. For this reason, the subsequent process of removing the sagging Db and the burrs Eb requires only a small cutting margin Wb, and material loss is reduced and productivity is improved.

<Invention of Claim 3>
According to a third aspect of the present invention, an aluminum material and a steel material are rolled and pressure-welded, and the clad material obtained by the rolling pressure-welding is subjected to a rolling process for improving the thickness dimensional accuracy. After the material is divided into divided clad materials having a desired width by machining, heat treatment is performed. The process of the invention of claim 3 is shown in FIG.
In this way, after performing secondary rolling, when the clad material is divided into multiple pieces in the width direction, the cross-sectional shape accuracy (longitudinal thickness dimensional accuracy and width direction shape accuracy) of the clad material is improved. Can be made.

<Invention of Claim 4>
In the invention of claim 4, the aluminum material and the steel material are rolled and pressure-welded, and the clad material obtained by the rolling pressure-welding is divided into divided clad materials having a desired width dimension by machining, and further to the divided clad material. A heat treatment is performed after rolling for improving the thickness dimensional accuracy. The process of the invention of claim 4 is shown in FIG.
In this way, by performing the secondary rolling after performing the process of dividing the clad material in the width direction, the sagging and burrs at the corners of the cut end of the divided clad material can be reduced by secondary rolling. Shape accuracy is improved.

<Invention of Claim 5>
In the invention of claim 5, the aluminum material and the steel material are rolled and pressure-welded, and the clad material obtained by the rolling pressure-welding is divided into divided clad materials having desired width dimensions by machining, and further, A heat treatment is performed after a drawing process for improving the shape accuracy of the end portion in the width direction. The process of the invention of claim 5 is shown in FIG.
Thus, by dividing the clad material into a plurality of pieces and then drawing the divided clad material, the sagging during the division process can be corrected, and the shape accuracy in the width direction of the divided clad material can be improved efficiently. .

For example, FIG. 7A shows a cross section perpendicular to the longitudinal direction of the divided clad material before drawing, and FIG. 7B shows a cross section perpendicular to the longitudinal direction of the divided clad material after drawing. As apparent from FIG. 7, the sagging and burrs that existed at the corners of the divided clad material before drawing can be corrected by drawing, and the corners of the divided clad material can also be chamfered by drawing dies.
Usually, a process (width finishing process) of finishing the dimension in the width direction to the dimension of the finished product is performed by machining at the time of molding the bearing after manufacturing the clad material. By carrying out the invention of claim 5, the width finishing step performed after manufacturing the clad material can be omitted.

<Invention of Claim 6>
In the invention of claim 6, the aluminum material and the steel material are rolled and pressure-welded, and the clad material obtained by the rolling pressure-welding is divided into divided clad materials having a desired width dimension by machining, and further to the divided clad material. It is characterized by performing a heat treatment after sequentially performing a rolling process for improving the longitudinal thickness dimensional accuracy and a drawing process for improving the shape accuracy of the end portion in the width direction. The process of the invention of claim 6 is shown in FIG.
In this case, the cross-sectional shape accuracy (longitudinal thickness dimensional accuracy, width direction shape accuracy) of the clad material can be further improved. And the width finishing process performed after clad material manufacture can be omitted.

<Invention of Claim 7>
In the invention of claim 7, the aluminum material and the steel material are rolled and pressure-welded, and the clad material obtained by the rolling pressure-welding is subjected to a rolling process for improving the thickness dimensional accuracy in the longitudinal direction. The clad material is divided into divided clad materials having a desired width by machining, and the divided clad materials are subjected to a drawing process for improving the shape accuracy of the end portions in the width direction, and then heat-treated. To do. The process of claim 7 is shown in FIG.
In this case, the cross-sectional shape accuracy (longitudinal thickness dimensional accuracy, width direction shape accuracy) can be further improved. Similarly, the width finishing step performed after the clad material is manufactured can be omitted.

  Examples of the present invention will be described below. First, an aluminum material was manufactured by rolling and pressing an aluminum alloy plate for a slide bearing and an aluminum alloy plate for bonding manufactured by a continuous casting method. Here, an Al—Sn—Si based aluminum alloy was used as the aluminum alloy plate for the slide bearing (Sn: 10 mass%, Si: 3 mass%, Al: balance). Moreover, the aluminum alloy board for adhesion used the Al-Mn-Cu type aluminum alloy (Mn: 1 mass%, Cu: 0.1 mass%, Al: remainder).

On the other hand, a strip steel plate (JISG3141) was prepared as a steel material. Then, as shown in FIG. 2, the aluminum material 1 is overlapped with the steel material 2 and passed through the roll rolling machine 3 to perform rolling pressure welding at a reduction rate of 40%, thereby bonding the aluminum material 1 and the steel material 2. Thus obtained cladding material 4 was obtained. The clad material 4 is formed by rolling and pressing an aluminum material 1 having a thickness of 1.4 mm and a steel material 2 having a thickness of 3.0 mm to have a total thickness of 2.6 mm and a width of 200 mm.
Thereafter, a dividing step of dividing the clad material 4 into a plurality of divided clad materials in the width direction, a rolling step (secondary rolling) for adjusting the thickness of the divided clad material 9, a drawing step, and an annealing step are sequentially performed. Examples 1 and 2 shown in Table 1 were obtained. Details of each step will be described later.

In the dividing step, a slitter 5 shown in FIG. 3 was used. The slitter 5 has a plurality of rotating cutters 7 fixed to the main shaft 6, and the dividing cutter 8 is rotated by the main shaft 6 while feeding the clad material 4 in the direction of the arrow to form slits 8 for division in the clad material 4. The clad material 4 is divided into a plurality of divided clad materials 9. In this case, the width of the divided clad material 9 is 18.2 mm.
The next secondary rolling was performed using a roll mill similar to the roll mill 3 of FIG. Secondary rolling by this roll rolling machine was carried out up to a reduction rate of 10% for the implementation product 1 and up to a reduction rate of 40% for the implementation product 2.

  The drawing process was performed by passing the divided clad material 9 through the drawing die 10 shown in FIG. By this drawing, both ends in the width direction of the divided clad material 9 cut by the slitter 5 are shaped, and the shape accuracy in the width direction is changed from the cross-sectional shape of FIG. 7A to the cross-sectional shape of FIG. Enhanced. That is, in the divided clad material 9 obtained by dividing the clad material 4 with the slitter 5, as shown in FIG. The sagging and burrs are corrected as shown in FIG. 7B by cleaving and the corners are chamfered. At the same time, the dimension in the width direction was changed from 18.2 mm to 17.5 mm.

And the last annealing process was performed by hold | maintaining the division | segmentation clad material 9 which finished the drawing process in a furnace at 350 degreeC for 10 hours.
On the other hand, in order to obtain comparative products 1 to 3 shown in Table 1, the aluminum material 1 and the steel material 2 were rolled and pressed in the same manner as described above to obtain a clad material 4. In this case, the clad material 4 is formed by rolling and pressing an aluminum material 1 having a thickness of 1.0 mm and a steel material 2 having a thickness of 2.2 mm to have a total thickness of 1.7 mm and a width of 200 mm. And comparative products 1-3 of Table 1 were manufactured from this clad material 4 as follows.

First, the comparative product 1 was obtained by sequentially performing an annealing process under the same conditions as the above-described products 1 and 2 and a dividing process using the slitter 5 on the clad material 4. Therefore, the comparative product 1 performs only the rolling press-contact, annealing, and division processes of the aluminum material and the steel material, and does not perform the secondary rolling and drawing processes. The width | variety of the division | segmentation clad material 9 was 17.5 mm by width finishing by cutting.
Further, the clad material 4 was subjected to an annealing process under the same conditions as the above-described products 1 and 2, and then a secondary rolling process and a dividing process were sequentially performed to obtain comparative products 2 and 3. In this case, the secondary rolling was performed for the comparative product 2 up to a reduction ratio of 8% and for the comparative product 3 up to a reduction ratio of 10%. In addition, when secondary rolling is performed after the annealing process, if an attempt is made to achieve a reduction ratio exceeding 10%, a poor adhesion between the aluminum material and the steel material has occurred, so a comparative product with a reduction ratio exceeding 10%. Did not prepare. Further, a slitter 5 shown in FIG. 3 was used in the dividing step. Also in this case, the width of the divided clad material 9 was set to 17.5 mm, which is the same as that of the comparative product 1.

Various measurements and fatigue tests were performed on the products 1 and 2 and the comparative products 1 to 3 obtained as described above.
Regarding the cross-sectional shape accuracy, the ratio of the area of the fatigued portion to the effective projected area of the bearing can be stably obtained at 5% or less (the ratio of the area of the fatigued portion will be described later). Comparison was made between the implemented product and the comparative product. When the production method of the present invention was carried out, a clad material having a fatigue area ratio of 5% or less was stably obtained even at a rolling reduction higher than 40%.

<Dare by slitter 5>
About the comparative product 2 and the implementation product 2, the degree of sagging and burrs of the divided clad material 8 obtained by dividing the clad material 4 with the slitter 5 was measured, and the measurement results are shown in FIGS. 4 (a) and 4 (b). It was. In the comparative product 2, the sagging width Wa reached 0.3 mm as shown in FIG. 4A, but in the product 2 the sagging width was 0.2 mm as shown in FIG. 4B. It was getting smaller.

<Shape accuracy by secondary rolling>
In order to compare the shape accuracy by secondary rolling for the product 2 and the comparative product 2 that were subjected to secondary rolling, the wall thickness was measured continuously along their longitudinal direction, and the meat to be obtained by secondary rolling. The difference from the thickness is shown in FIGS. 5 (a) and 5 (b).
In the comparative product 2, as shown in FIG. 5B, the wall thickness variation is large even when the secondary rolling is performed. On the other hand, as shown in FIG. 5A, the embodiment product 2 has little variation in thickness and high shape accuracy in the thickness direction (longitudinal thickness dimensional accuracy).

<Width direction shape by drawing>
FIGS. 7A and 7B show the cross-sectional shapes of the embodiment product 2 before and after the drawing process of the divided clad material 9. As a result of this drawing process, the width of the product 2 is reduced from 18.2 mm to 17.5 mm, and the thickness is reduced from 1.6 mm to 1.5 mm. In addition, the corners are chamfered by 0.5 mm and 0.2 mm so that the sagging and burrs need not be excised.

<Fatigue test>
Fatigue tests were performed on the products 1 and 2 and the comparative products 1 to 3. In this fatigue test, strip-shaped clad pieces 11 having a predetermined length are obtained from the divided clad materials 9 of the products 1 and 2 and the comparative products 1 to 3 as shown in FIG. The half bearing 12 (sample) shown in FIG. 9 was manufactured by bending the aluminum material side and finishing the aluminum material side that became the inner surface side. The half bearing 12 is mounted on a fatigue testing machine, and after a 30-minute run-in operation, the bearing surface pressure is increased by 5 MPa to the maximum test surface pressure every 10 minutes. After driving for 20 hours, the degree of fatigue was examined. The maximum test surface pressure was set to 100 MPa and 110 MPa, and the degree of fatigue was examined for each.
The degree of fatigue is evaluated in five stages by the ratio of the area of the fatigue portion to the effective projected area of the bearing. Evaluation 1 exceeds 50%, Evaluation 2 exceeds 15% to 50%, and Evaluation 3 exceeds 5% to 15%. Evaluation 4 was 5% or less, and Evaluation 5 was no fatigue part. The conditions of the fatigue test are as shown in Table 2 below.

  The results of fatigue evaluation are shown in Table 1.

Looking at the results of the fatigue test, all samples of Examples 1 and 2 and Comparative Examples 1 to 3 were evaluated 5 at a maximum test surface pressure of 100 MPa.
On the other hand, when the maximum test surface pressure was 110 MPa, there was a difference in fatigue resistance between the comparison products 2 and 3 and the implementation products 1 and 2. That is, in the comparative products 2 and 3 subjected to secondary rolling after annealing, there are samples of fatigue evaluation 4 in particular, and in comparative product 3 where the rolling reduction of secondary rolling is as high as 10%, fatigue evaluation 1 Sample is present. However, in Examples 1 and 2 that were annealed after secondary rolling, all samples had a fatigue rating of 5. Since Comparative Product 1 was not subjected to secondary rolling, its fatigue resistance was about the same as Example Products 1 and 2.

  Thus, the comparative products 2 and 3 subjected to secondary rolling after annealing are inferior in fatigue resistance. In particular, the fatigue resistance tends to decrease as the rolling reduction of the secondary rolling increases, and the maximum test surface pressure is still 100 MPa, but when the maximum testing surface pressure is 110 MPa, the rolling reduction of the secondary rolling is 10%. In the comparative product 3, the sample of evaluation 1 appeared, and in the comparative product 2 with a rolling reduction of 8%, only the sample of evaluation 4 and no sample of evaluation 5 appeared.

  On the other hand, even if the secondary rolling is performed, in the products 1 and 2 that were subjected to the secondary rolling before annealing, all samples were evaluated 5 at the maximum test surface pressure of 110 MPa, and excellent in fatigue resistance. It is understood. In particular, the product 2 was subjected to secondary rolling at a reduction rate of 40%, and high fatigue resistance equivalent to that of the product 1 having a reduction rate of 10% could be obtained.

The reason why the fatigue resistance of the comparative products 2 and 3 that were subjected to secondary rolling after annealing was reduced was that the aluminum material and the steel material were displaced due to external force during the secondary rolling, resulting in a decrease in adhesive strength. It seems that it was because it was. On the other hand, in the products 1 and 2 that were subjected to secondary rolling before annealing, even if the aluminum material and the steel material were misaligned during the secondary rolling, the aluminum material and the steel material did not interact with each other during the subsequent annealing. Since it causes diffusion and strengthens the bond, it seems to be excellent in fatigue resistance as compared with the comparative products 2 and 3.
Moreover, in the implementation products 1 and 2, although the drawing was performed in order to increase the shape accuracy in the width direction of the split coupling plate 9, even if the aluminum material 1 and the steel material 2 were displaced in this drawing process, Since the bonding between the aluminum material 1 and the steel material 2 is strengthened by the annealing performed in the above, it is considered that there is no decrease in fatigue resistance.

The present invention is not limited to the embodiment described above and shown in the drawings, and can be expanded or changed as follows.
The rolling reduction of rolling contact is not limited to 40%. The rolling reduction of secondary rolling is not limited to 10% and 40%. In secondary rolling, rolling may be performed once or multiple times.
You may make it anneal after performing a rolling press-contact and secondary rolling.
You may make it anneal after performing rolling pressure welding and a division | segmentation.
You may make it anneal, after performing rolling pressure welding, secondary rolling, and a division in order.
Annealing may be performed after rolling pressing, division, and drawing in order.
You may make it anneal, after performing rolling pressure welding, secondary rolling, division | segmentation, and drawing in order.
As long as the aluminum material and the steel material are processed so as not to cause a positional shift, the processing may be performed after annealing.

The figure which shows the process of the manufacturing method of this invention Schematic diagram of a rolling mill that performs rolling pressure welding The perspective view which shows the state which divides | segments a clad material with a slitter It is a fragmentary sectional view of the division | segmentation clad material divided | segmented with the slitter, (a) is sectional drawing of a comparative product, (b) is sectional drawing of the implementation product of this invention. It shows the measurement result of the thickness change in the longitudinal direction of the clad material after the secondary rolling, (a) is a graph showing the thickness change of the product of the present invention, (b) is the thickness change of the comparative product. It is a graph to show. The drawing die is shown, (a) is a longitudinal side view, (b) is a longitudinal front view of a drawing hole. The cross section of a division | segmentation clad material is shown, (a) is sectional drawing which follows the AA line in FIG. 6 before drawing, (b) is sectional drawing which follows the BB line in FIG. 6 after drawing. Perspective view of a state in which a divided clad material is cut to a desired length Perspective view of half bearing

Explanation of symbols

  In the drawings, 1 is an aluminum plate (aluminum material), 2 is a steel strip (steel material), 3 is a roll mill, 4 is a cladding material, 5 is a slitter, 9 is a divided cladding material, 10 is a drawing die, and 12 is half It is a bearing.

Claims (7)

In a method of manufacturing a clad material which is a material for forming an aluminum bearing by joining an aluminum material made of aluminum or an aluminum alloy and a steel material,
A clad material for an aluminum bearing, wherein the aluminum material and the steel material are subjected to a rolling pressure welding, and the clad material obtained by the rolling pressure welding is subjected to a rolling process for improving the thickness dimensional accuracy, followed by a heat treatment. Manufacturing method. In a method of manufacturing a clad material which is a material for forming an aluminum bearing by joining an aluminum material made of aluminum or an aluminum alloy and a steel material,
An aluminum bearing clad material, wherein the aluminum material and the steel material are rolled and pressure-bonded, and the clad material obtained by the rolling pressure-welding is divided into divided clad materials having a desired width dimension by machining, followed by heat treatment. Production method. In the manufacturing method of the cladding material for aluminum bearings according to claim 1,
A method for producing a clad material for an aluminum bearing, comprising: subjecting the rolled clad material to a divided clad material having a desired width by machining and then heat-treating the clad material. In the manufacturing method of the clad material for aluminum bearings according to claim 2,
A method of manufacturing a clad material for an aluminum bearing, comprising subjecting the divided clad material to a heat treatment after rolling to improve thickness dimensional accuracy. In the manufacturing method of the clad material for aluminum bearings according to claim 2,
A method of manufacturing a clad material for an aluminum bearing, comprising subjecting the divided clad material to a drawing process for improving the shape accuracy of the end portion in the width direction, and then heat-treating. In the manufacturing method of the clad material for aluminum bearings according to claim 4,
A method for producing a clad material for an aluminum bearing, comprising subjecting the divided clad material after the rolling process to a drawing process for improving the shape accuracy of the end portion in the width direction, followed by heat treatment. In the manufacturing method of the clad material for aluminum bearings according to claim 3,
A method of manufacturing a clad material for an aluminum bearing, comprising subjecting the divided clad material to a drawing process for improving the shape accuracy of the end portion in the width direction, and then heat-treating.

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