JP6812956B2 - Stainless steel plate for lamination and laminate - Google Patents

Description

The present invention relates to a stainless steel sheet for lamination, which can obtain excellent noise attenuation ability when laminated.

A heat shield (heat insulator) may be attached to the exhaust pipe of an engine mounted on an automobile or the like in order to protect other electronic parts from radiant heat. This heat shield also has a role of attenuating the noise emitted from the exhaust pipe and a role of protecting the exhaust pipe from flying objects such as stepping stones and rainwater.

Aluminum plates, plated steel plates, stainless steel plates, etc. are used as the material of the heat shield plate, and these are used properly depending on the usage environment. Of these, stainless steel sheets are superior in heat resistance, corrosion resistance, and strength to other materials, and are therefore often used for manifolds, which are particularly hot, and heat shield plates such as mufflers exposed under the vehicle body.

In addition, the heat shield plate may have a laminated structure from the viewpoint of increasing noise damping ability (hereinafter, also simply referred to as damping ability) and rigidity.
For example, in Patent Document 1,
"In a cover structure formed by stacking a plurality of metal plates on top of each other, the plurality of metal plates are stacked and bonded to each other at a plurality of places, and a plurality of openings are formed in at least one metal plate inside the cover. The cover structure is characterized by the fact that it has been done. "
Is disclosed.

Further, in Patent Document 2,
"In the heat insulator that covers the exhaust system parts,
The first plate material and the second plate material having different natural frequencies are laminated and configured, and an opening penetrating through the first plate material and the second plate material is formed.
Grommets are attached to the edge of the opening to have wraparound portions that wrap around the outer surface of the first plate material and the outer surface of the second plate material, and to sandwich each plate material from both sides in the plate thickness direction by these wraparound portions. And
The wraparound dimension of the first plate material to the outer surface and the wraparound dimension of the second plate material to the outer surface of the grommet are set to different dimensions according to the natural frequencies of the first plate material and the second plate material, respectively. A heat insulator characterized by being "
Is disclosed.

Japanese Unexamined Patent Publication No. 2001-140642 Japanese Unexamined Patent Publication No. 2016-191345

However, in the techniques of Patent Documents 1 and 2, it is necessary to significantly change the structure of the heat shield plate itself, and as the shape of parts becomes complicated, the number of parts increases, and the manufacturing process (particularly the processing process) becomes complicated. There is a problem that the weight of parts increases and the manufacturing cost increases.
Therefore, at present, it is desired to further improve the damping ability of the heat shield plate while avoiding the complicated parts shape and the complicated manufacturing process.

The present invention has been developed in view of the above-mentioned current situation, and if it is possible to manufacture a heat shield plate having excellent noise attenuation ability while avoiding complicated parts shape and manufacturing process. It is an object of the present invention to provide a stainless steel plate for laminating.
Another object of the present invention is to provide a laminate having the above-mentioned stainless steel plate for lamination.

By the way, the inventors have repeated various studies in order to solve the above-mentioned problems.
as a result,
-In a heat shield plate having a laminated structure, the surface shape of the contact surface between the plate materials constituting the heat shield plate, particularly the surface roughness, affects the damping ability of the heat shield plate.
-That is, in a heat shield plate having a laminated structure, frictional heat is generated at the contact surface between the plate materials constituting the heat shield plate when vibrating, which contributes to the attenuation of vibration energy.
-In order to increase the frictional energy on the contact surface, it is important to control the surface roughness of the contact surface between the plate materials within an appropriate range, and by performing such control, the component shape itself becomes a special shape. Even if it is not, it is possible to increase the damping capacity of the heat shield plate,
I got the knowledge.
The present invention has been completed after further studies based on the above findings.

That is, the gist structure of the present invention is as follows.
A stainless steel plate for laminating, which is a material for a laminated body in which 1.2 or more plate materials are laminated.
The stainless steel sheet for lamination is based on mass%.
C: 0.025% or less,
Si: 0.01 to 1.50%,
Mn: 0.01 to 1.00%,
S: 0.010% or less,
P: 0.050% or less,
Cr: 10.5 to 32.0%,
Ni: 0.01-0.60%,
Al: 0.001 to 6.0% and N: 0.050% or less, and
Ti: 0.01-1.00%,
Nb: 0.01 to 1.00% and Zr: 0.01 to 1.00%
It contains one or more selected from the above, and has a component composition in which the balance consists of Fe and unavoidable impurities.
A stainless steel sheet for lamination, wherein the surface roughness of at least one surface is 0.010 to 1.50 μm in arithmetic average roughness Ra.

2. 2. The composition of the ingredients
Cu: 0.01-1.00%,
Mo: 0.01 to 3.00% and REM: 0.01 to 0.30%
The stainless steel sheet for lamination according to 1 above, which contains one or more selected from the above.

3. A laminated body in which two or more plate materials are laminated.
At least one of the plate materials is the stainless steel sheet for lamination according to 1 or 2 above, and the stainless steel sheet for lamination has a surface roughness of 0.010 to 1.50 μm in arithmetic average roughness Ra. At least one surface of the laminate is arranged so as to be in contact with the other plate material of the laminate.
Further, the loss coefficient of the laminated body is 2.0 times or more the loss coefficient of the stainless steel sheet having the same material as the stainless steel sheet for lamination used for the plate material of the laminated body and the same thickness as the laminated body. There is a laminate.

According to the present invention, it is possible to obtain a stainless steel sheet for lamination, which makes it possible to manufacture a heat shield plate having an excellent noise damping ability while avoiding complicated parts shape and complicated manufacturing process. ..
Further, by using the stainless steel plate for lamination of the present invention, it is possible to manufacture a heat shield plate that covers most of the exhaust pipe exposed under the vehicle body of the automobile, which has a particularly large influence on quietness. It is possible to greatly improve the quietness of the car.

It is a figure which shows typically the shape of the laminated test piece used for measuring the loss coefficient.

Hereinafter, the present invention will be specifically described.
First, the component composition of the stainless steel sheet for lamination of the present invention will be described. The unit in the component composition is "mass%", but hereinafter, unless otherwise specified, it is simply indicated by "%".

C: 0.025% or less C is an element effective for increasing the strength of steel. However, if the amount of C exceeds 0.025%, the toughness and workability deteriorate. Therefore, the amount of C is set to 0.025% or less. From the viewpoint of workability, the lower the amount of C, the more desirable, and 0.020% or less is preferable. More preferably, it is 0.010% or less. On the other hand, from the viewpoint of ensuring the strength as a member, the amount of C is preferably 0.001% or more, more preferably 0.003% or more.

Si: 0.01 to 1.50%
Si is an element effective for improving oxidation resistance. This effect is obtained with a content of 0.01% or more of Si. However, if the amount of Si exceeds 1.50%, the workability is lowered. Therefore, the amount of Si is set to 0.01 to 1.50%. It is preferably 0.05 to 1.00%. More preferably, it is 0.10 to 0.50%.

Mn: 0.01 to 1.00%
Mn is an element that increases the strength of steel and also has an action as an antacid. The effect is obtained with a content of 0.01% or more of Mn. However, if the amount of Mn exceeds 1.00%, the corrosion resistance is lowered. Therefore, the amount of Mn is set to 0.01 to 1.00%. It is preferably 0.05 to 0.70%. More preferably, it is 0.10 to 0.50%.

S: 0.010% or less S reduces corrosion resistance, so it is desirable to reduce it as much as possible. Therefore, the amount of S is set to 0.010% or less. It is preferably 0.005% or less.

P: 0.050% or less P is an element that reduces toughness, and it is desirable to reduce it as much as possible. Therefore, the amount of P is set to 0.050% or less. It is preferably 0.035% or less.

Cr: 10.5 to 32.0%
Cr is an element necessary for forming a passivation film on the surface to improve oxidation resistance. In order to obtain good oxidation resistance, it is necessary to contain Cr in an amount of 10.5% or more. On the other hand, when the amount of Cr exceeds 32.0%, the steel becomes hard and the manufacturability and workability deteriorate. Therefore, the amount of Cr is set to 10.5 to 32.0%. It is preferably 10.5 to 22.0%. More preferably, it is 10.5 to 20.0%.

Ni: 0.01 to 0.60%
Ni is an element that improves the toughness of steel. This effect is obtained with a content of 0.01% or more of Ni. However, when the amount of Ni exceeds 0.60%, a γ phase is generated in a part of the steel structure and the formability deteriorates. Therefore, the amount of Ni is set to 0.01 to 0.60%. It is preferably 0.05 to 0.40%. More preferably, it is 0.10 to 0.30%.

Al: 0.001 to 6.0%
Al acts as a deoxidizing material for steel. The effect is obtained with a content of 0.001% or more of Al. Further, Al has an effect of improving the oxidation resistance of steel, and when particularly excellent oxidation resistance is required, it is preferable to contain Al in an amount of 0.1% or more. However, if the amount of Al exceeds 6.0%, the steel is hardened and the workability is lowered. Therefore, the amount of Al is set to 6.0% or less. It is preferably 4.0% or less. More preferably, it is 1.0% or less. More preferably, it is 0.1% or less.

N: 0.050% or less N reduces the toughness and formability of the steel, and therefore it is desirable to reduce it as much as possible. Therefore, the amount of N is set to 0.050% or less. It is preferably 0.030% or less. More preferably, it is 0.010% or less.

One or more selected from Ti: 0.01 to 1.00%, Nb: 0.01 to 1.00% and Zr: 0.01 to 1.00% Ti, Nb and Zr are It has the effect of fixing C and N to prevent the formation of Cr carbonitride, and improves corrosion resistance, moldability, and intergranular corrosion resistance of welds. For that purpose, the content of Ti, Nb and / or Zr must be 0.01% or more. On the other hand, if the content of these elements exceeds 1.00%, the toughness of the steel is lowered, and the manufacturability and workability are likely to be lowered. Therefore, the Ti amount, the Nb amount, and the Zr amount are all set to 0.01 to 1.00%.
The amount of Ti is preferably 0.05 to 0.40%, more preferably 0.15 to 0.35%. The amount of Nb is preferably 0.05 to 0.55%, more preferably 0.15 to 0.40%. The amount of Zr is preferably 0.05 to 0.20%, more preferably 0.05 to 0.10%.

Although the basic components have been described above, the following elements can be appropriately contained in order to improve strength, toughness, processability, and corrosion resistance.

One or more selected from Cu: 0.01 to 1.00%, Mo: 0.01 to 3.00% and REM: 0.01 to 0.30% Cu is the corrosion resistance of stainless steel. It is an element that improves. In order to obtain the effect, it is preferable to contain Cu in an amount of 0.01% or more. However, if the amount of Cu exceeds 1.00%, the workability tends to decrease. Therefore, the amount of Cu is preferably 1.00% or less. It is more preferably 0.75% or less, still more preferably 0.50% or less.
Like Cu, Mo is also an element that improves the corrosion resistance of stainless steel. In order to obtain the effect, it is preferable to contain Mo in 0.01% or more. However, if the amount of Mo exceeds 3.00%, the workability tends to decrease. Therefore, the amount of Mo is preferably 3.00% or less. It is more preferably 2.20% or less, still more preferably 1.20% or less.
REM is a general term for Sc, Y and elements with element numbers 67 to 71 (La to Lu). Here, REM has the effect of improving the adhesion of the oxide film formed at a high temperature and improving the oxidation resistance, and therefore can be contained when particularly excellent oxidation resistance is required. In order to obtain the effect, the REM amount is preferably 0.01% or more. It is more preferably 0.03% or more, still more preferably 0.05% or more. On the other hand, if the REM amount exceeds 0.30%, the workability tends to decrease. Therefore, the REM amount is preferably 0.30% or less. It is more preferably 0.20% or less, still more preferably 0.15% or less.

Components other than the above are Fe and unavoidable impurities.

Then, in the stainless steel sheet for lamination of the present invention, it is extremely important to adjust the surface shape, specifically, the surface roughness of at least one surface within an appropriate range.
Surface roughness: Arithmetic mean roughness Ra of 0.010 to 1.50 μm
As described above, in a heat shield plate having a laminated structure, frictional heat is generated at the contact points between the plate materials constituting the heat shield plate when vibrating, which contributes to the attenuation of vibration energy, and the contact points between the plate materials. If the surface roughness of the contact surface of at least one of the plate materials is controlled within an appropriate range to increase the frictional energy on the contact surface, the damping ability of the heat shield plate can be enhanced.
Here, if the arithmetic mean roughness Ra is less than 0.010 μm, the friction coefficient becomes small and sufficient frictional heat cannot be obtained, and the damping ability of the heat shield plate cannot be sufficiently enhanced. On the other hand, when the arithmetic average roughness Ra exceeds 1.50 μm, the contact area between the plate materials becomes small, the frictional heat becomes small, and the damping ability of the heat shield plate cannot be sufficiently enhanced.
Therefore, the surface roughness is set to 0.010 to 1.50 μm in arithmetic average roughness Ra. It is preferably 0.03 μm or more, more preferably 0.05 μm or more, and further preferably 0.10 μm or more. Further, it is preferably 1.00 μm or less, more preferably 0.70 μm or less.

Here, the arithmetic mean roughness Ra is a roughness curve measured in the width direction (rolling perpendicular direction) of a steel sheet under the conditions of an L filter: 0.25 mm and a measurement distance: 1.25 mm according to JIS B0601 (2001). The arithmetic mean roughness obtained from.

Further, the surface roughness of both sides of the stainless steel plate for lamination may be adjusted as described above, but when the laminate is formed, the surface of the surface on the side in contact with other plate materials (hereinafter, also referred to as the contact surface). The roughness shall be in the range of 0.010 to 1.50 μm in arithmetic average roughness Ra, while the surface roughness of the surface on the side not in contact with other plate materials shall be different from the surface roughness of the contact surface. For example, after adjusting the surface roughness of the contact surface to the above range, the other surface may be mirror-polished so that the surface roughness of the other surface is less than 0.010 μm in arithmetic average roughness Ra. .. By using such a stainless steel plate on the outermost side of the laminate constituting the heat shield plate, for example, it is possible to secure a beautiful appearance while obtaining excellent noise attenuation ability.

Next, the laminated body of the present invention will be described.
The laminated body of the present invention is a laminated body in which two or more plate materials are laminated.
At least one of the plate materials is the above-mentioned stainless steel sheet for lamination, and the stainless steel sheet for lamination has at least one surface having a surface roughness of 0.010 to 1.50 μm in arithmetic average roughness Ra. Is arranged so as to come into contact with the other plate material of the laminate.
Further, the loss coefficient of the laminated body is 2.0 times or more the loss coefficient of the stainless steel sheet having the same material as the stainless steel sheet for lamination used for the plate material of the laminated body and the same thickness as the laminated body. There is something.

Here, the number of plate materials used for the laminated body may be two or more, and a three-layered or four-layered laminated body may be used. Further, as the number of sheets increases, excellent damping ability and sound insulation can be obtained, but since the mass of parts and man-hours increase, an appropriate number of sheets is selected according to the purpose.
Further, the above-mentioned stainless steel sheet for lamination may be used for all the plate materials constituting the laminate, but at least one of the above-mentioned stainless steel sheets for lamination is used, and the above-mentioned stainless steel sheet for lamination has a surface roughness. It is necessary to arrange so that at least one surface having an arithmetic average roughness Ra of 0.010 to 1.50 μm is in contact with the other plate material constituting the laminate. Thereby, the damping ability of the laminated body is enhanced, specifically, the loss coefficient of the laminated body is made of the same material as the stainless steel plate for lamination used for the plate material of the laminated body, and has the same thickness as the laminated body. It is possible to make the loss coefficient of a certain stainless steel sheet 2.0 times or more. For example, when one stainless steel plate for lamination is used as the plate material constituting the laminate, the surface roughness of the stainless steel plate for lamination is adjusted in the range of 0.010 to 1.50 μm in arithmetic average roughness Ra. The surface is arranged so as to be in contact with other plate materials constituting the laminated body (so as to be a contact surface with other plate materials). When two or more stainless steel plates for laminating are used as the plate material constituting the laminated body, the arrangement of the plate materials is not particularly limited, but the surface roughness is 0.010 to 1.50 μm in arithmetic average roughness Ra. It is preferable to arrange the plate materials so that the surfaces adjusted to the range come into contact with each other.
As the other plate material, an aluminum plate, a plated steel plate, or the like can be used in addition to the stainless steel plate.

Here, the loss coefficient is a damping curve (damping free vibration waveform) measured under the conditions of test piece holding method: suspension (vibration) and test piece vibration method: impulse hammer in accordance with JIS G0602. ), It is a loss coefficient at a 1/1 octave band center frequency of 1 kHz obtained by the attenuation method.

Further, the arrangement (lamination order) of the plate materials in the laminate made of the above-mentioned stainless steel plate for lamination and other materials may be appropriately determined according to the application and the like.
For example, when used for a heat shield plate exposed under the vehicle body that may come into contact with flying objects from the outside, the above-mentioned stainless steel plate for lamination is the outermost (installed) from the viewpoint of improving corrosion resistance and strength. Sometimes it is preferable to arrange it so that it is on the side far from the vehicle body).
On the other hand, when used as a heat shield plate for high-temperature members such as exhaust manifolds, the above-mentioned stainless steel plate for lamination should be on the innermost side (the side closer to the vehicle body (high-temperature member) when installed) from the viewpoint of improving heat resistance. It is preferable to arrange it in.

The suitable thickness of the laminate is 0.1 to 2.0 mm. Further, the preferable thickness of the plate material constituting the laminated body is 0.2 to 1.0 mm in the case of the laminated body of two layers, and 0.1 to 0.6 mm in the case of the laminated body of three or more layers. ..

Next, the method for manufacturing the stainless steel sheet for lamination of the present invention will be described.
The molten steel having the above-mentioned composition is melted by a known method such as a converter, an electric furnace, a vacuum melting furnace, etc., and made into a slab by a continuous casting method or a lump-incubation method.
This slab is heated at 1100 to 1250 ° C. for 1 to 24 hours and then hot-rolled to obtain a hot-rolled steel sheet having a plate thickness of about 2.0 to 4.0 mm, and then the hot-rolled steel sheet is heated at 800 ° C to 1050 ° C. The hot-rolled sheet is annealed by holding it for 5 seconds to 15 minutes to obtain a hot-rolled annealed sheet.
Then, if necessary, the product may be descaled by pickling or mechanical polishing, or if the plate thickness is to be further reduced, the above hot-rolled annealed plate is subjected to cold rolling and cold-rolled annealed. Apply to make a cold-rolled annealed plate.
In addition, the surface roughness of the final product plate shall be determined by appropriately setting the roughness and diameter (diameter) of the rolling roll used at the time of final rolling, temper rolling, polishing, pickling, etc. as appropriate conditions. It can be adjusted by combining them.
Further, after processing into the final part shape, the surface roughness of the stainless steel sheet for lamination, which is the material of the laminated body, may be adjusted by polishing or the like, but from the viewpoint of production efficiency, before processing into the part shape. In addition, it is preferable to adjust the surface roughness.

Further, in the laminated body of the present invention, two or more plate materials including the stainless steel plate for lamination of the present invention are laminated, and these plate materials are fixed by, for example, welding, bolt fastening, riveting, caulking, or the like. Can be manufactured.
The conditions of these fixing methods are not particularly limited, and the conventional method may be followed.

Steel having the composition shown in Table 1 (the balance is Fe and unavoidable impurities) was further melted by a vacuum melting furnace, heated at 1100 to 1300 ° C. for 1 hour, and then hot-rolled to obtain a plate thickness of 4. A 0 mm hot-rolled steel sheet was used. Next, the obtained hot-rolled steel sheet was subjected to a heat treatment (hot-rolled sheet annealing) held at 900 to 1100 ° C. for 1 minute, and then the surface scale was removed by grinding to obtain a hot-rolled annealed sheet.

Then, the hot-rolled annealed sheet thus obtained was subjected to cold rolling (reverse rolling) and cold-rolled sheet annealing (annealing temperature: 900 to 1100 ° C., holding time: 1 minute) under the conditions shown in the symbols BA to BD in Table 2. ), Pickling (same conditions as the symbol CF in Table 3 described later) and / or temper rolling (roll surface roughness Ra: 0.05 to 0.1 μm) to obtain a cold-rolled annealed sheet. A part of these cold-rolled annealed plates was further subjected to surface processing of symbols CA to CF in Table 3 to change the surface state. By such a method, stainless steel sheets having a thickness of 0.5 mm or 1.0 mm adjusted to various surface roughness were obtained.
Here, the mirror polishing of the symbol CA in Table 3 was performed by polishing with a polishing paper having a particle size of 1200 and then buffing with a diamond paste having a particle size of 1 μm. In polishing with abrasive papers having symbols CB, CC, and CD, abrasive papers having a particle size of 1000 (# 1000), a particle size of 600 (# 600), and a particle size of 180 (# 180) were used, respectively. Polishing with a grinder with the symbol CE was carried out using a CBN grindstone having a particle size of No. 400 under the conditions of a grindstone peripheral speed of 1500 m / min and a feed rate of 5 m / min. In the polishing with a grinder and polishing paper, the polishing direction was the longitudinal direction (rolling direction) of the steel sheet.
The pickling of the symbol CF was carried out by preparing a mixed acid solution having a nitric acid concentration: 170 g / L and a hydrochloric acid concentration: 7 g / L, and electrolyzing the mixture in a solution at 60 ° C. for 40 to 120 seconds.
In any surface processing, the amount of reduction in plate thickness was 0.05 mm or less.

Then, the surface roughness (arithmetic mean roughness Ra) of the obtained stainless steel sheet was measured by the following method.
That is, the roughness curve is measured in the width direction (rolling perpendicular direction) of the steel sheet under the conditions of L filter: 0.25 mm and measurement distance: 1.25 mm according to JIS B0601 (2001) at an arbitrary position on the surface of the stainless steel sheet. Then, the arithmetic mean roughness Ra was obtained. The measurement was performed three times, and the average value of the three times is shown in Table 4 as the arithmetic mean roughness Ra.

Then, a plurality of test pieces having a width of 120 mm and a length of 180 mm were cut out from the obtained stainless steel plate (thickness: 0.5 mm), and two test pieces of the same steel type subjected to the same surface treatment were overlapped. Then, it was fixed by spot welding to obtain a laminated test piece as shown in FIG. In the laminated test piece, two test pieces of the same steel type were overlapped so that the surfaces on the side where the surface roughness was adjusted were in contact with each other.
Welding conditions were: pressing force: 2 kN, current: 7 kA, nugget diameter: about 6 mm. Further, a hole having a diameter of 5 mm was formed in the corner portion of the laminated test piece in order to pass a thread when measuring the loss coefficient.
In addition, a reference test piece that was not laminated was also prepared separately. That is, a test piece having a width of 120 mm and a length of 180 mm is cut out from the obtained stainless steel plate (thickness: 1.0 mm), and a diameter for threading a thread through the corner portion of the test piece when measuring the loss coefficient. : A reference test piece was prepared by making a hole of 5 mm.

Using the laminated test piece and the reference test piece thus obtained, according to JIS G0602 (1993), the test piece holding method: suspension (vibration), test piece vibration method: attenuation under the condition of impulse hammer. The curve (damped free vibration waveform) was measured, and the loss coefficient of the 1 kHz band (1/1 octave band center frequency 1 kHz) was obtained by the damping method.
That is, the laminated test piece and the reference test piece were hung on the beam by passing a thread through a hole made in the corner, and the laminated test piece and the reference test piece were vibrated by an impulse hammer, respectively, and the damping curve at that time was measured. .. Then, these attenuation curves were separated for each frequency by octave analysis, and the loss coefficient in the 1 kHz band, which is particularly problematic due to noise from the automobile exhaust pipe, was obtained by the attenuation method.
The measuring instruments used were an FFT analyzer (CF9200 manufactured by Ono Sokki), an impulse hammer (GK3100 manufactured by Ono Sokki), and an acceleration sensor (NP3211 manufactured by Ono Sokki). All measurements were performed at room temperature.
Then, the noise attenuation ability was evaluated according to the following criteria.
◎ (Pass, especially excellent): The loss coefficient of the laminated test piece is 3.0 times or more of the loss coefficient of the reference test piece ○ (Pass, excellent): The loss coefficient of the laminated test piece is the loss coefficient of the reference test piece. 2.0 times or more and less than 3.0 times × (Failure): The loss coefficient of the laminated test piece is less than 2.0 times the loss coefficient of the reference test piece. The evaluation results are shown in Table 4.

From Table 4, it can be seen that excellent noise attenuation ability is obtained in all of the invention examples. In particular, a laminated test piece having an arithmetic average roughness Ra in the range of 0.10 to 1.00 μm was able to obtain particularly excellent noise attenuation ability.
On the other hand, in each of the comparative examples, sufficient noise attenuation ability could not be obtained.

Claims (3)

A stainless steel plate for laminating, which is a material for a laminated body in which two or more plate materials are laminated.
The stainless steel sheet for lamination is based on mass%.
C: 0.025% or less,
Si: 0.01 to 1.50%,
Mn: 0.01 to 1.00%,
S: 0.010% or less,
P: 0.050% or less,
Cr: 10.5 to 32.0%,
Ni: 0.01-0.60%,
Al: 0.001 to 6.0% and N: 0.050% or less, and
Ti: 0.01-1.00%,
Nb: 0.01 to 1.00% and Zr: 0.01 to 1.00%
It contains one or more selected from the above, and has a component composition in which the balance consists of Fe and unavoidable impurities.
The surface roughness of at least one surface is 0.31 to 1.50 μm in arithmetic average roughness Ra, and the plate thickness is 1.0 mm or less (however, C: 0.010%, Si: 0.51%). , Mn: 0.34%, S: 0.005%, P: 0.04%, Cr: 20.22%, Ni: 0.13%, Al: 0.001%, N: 0.012%, It has a component composition containing Ti: 0.001% and Nb: 0.359%, and the surface roughness of at least one surface is 0.35 μm in arithmetic average roughness Ra, and the plate thickness is (Except when it is 1 mm) , stainless steel plate for lamination. The composition of the ingredients
Cu: 0.01-1.00%,
Mo: 0.01 to 3.00% and REM: 0.01 to 0.30%
The stainless steel sheet for lamination according to claim 1, which contains one or more selected from the above. It is a laminated body in which two or more plate materials are laminated.
The plate material is the stainless steel sheet for lamination according to claim 1 or 2, and the stainless steel sheet for lamination has at least one having a surface roughness of 0.31 to 1.50 μm in arithmetic average roughness Ra. The surfaces are arranged so as to be in contact with other plate materials of the laminated body, and the stainless steel sheets for lamination are each made of the same material.
Further, the loss coefficient of the laminated body is 2.0 times or more the loss coefficient of the stainless steel sheet having the same material as the stainless steel sheet for lamination used for the plate material of the laminated body and the same thickness as the laminated body. There is a laminate.

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