JP5753744B2 - Thermal spray fastener, thermal spray nut and manufacturing method thereof - Google Patents

Description

  The present invention relates to a thermal spray fastener, a thermal spray nut, and a method for manufacturing the same, in which a thermal spray coating is formed and a fastened body is fastened.

  There exists a thing like patent document 1 as a thermal spray fastener in which the thermal spray coating was formed. The thermal spray fastener of patent document 1 is for fastening a to-be-fastened body, and is provided with the thermal spray bolt, the thermal spray nut, and the 1st and 2nd thermal spray washer. As for the to-be-fastened body, the thermal spray coating of the Al-Mg alloy is formed in the bolt hole in which the thermal spray bolt is inserted.

  Further, the thermal spray bolt is, for example, a hexagonal bolt, and an Al—Mg alloy thermal spray coating is formed on the entire surface. The thermal spray nut is, for example, a hexagon nut with a seat that is fastened to a screw portion of a thermal spray bolt across a body to be fastened, and an Al-Mg alloy is formed on the entire surface excluding an inner screw portion and a seating surface that is a contact surface on the body to be fastened. The sprayed coating is formed. A 1st washer is arrange | positioned between the head of a thermal spraying bolt, and a to-be-fastened body, and the thermal spray coating of the Al-Mg alloy is formed in the whole surface. The second washer is disposed between the sprayed nut and the fastened body, and an Al—Mg alloy sprayed coating is formed on the entire surface excluding the contact surface on the fastened body side.

  In such a thermal spray fastener of Patent Document 1, since the thermal spray coating is not formed on the inner screw portion and the seat surface of the thermal spray nut, the sliding surface between the inner screw portion of the thermal spray nut and the screw portion of the thermal spray bolt, In the sliding surface between the sprayed nut and the washer, the sprayed coating is provided on only one of the surfaces. Therefore, when the thermal spray nut is tightened, the sprayed coatings are not integrated on these sliding surfaces, and can be tightened to the end with a predetermined tightening torque. Therefore, the thermal spray fastener of Patent Document 1 can obtain the axial force required when tightened with a predetermined tightening torque.

  However, in the thermal spray fastener of Patent Document 1, since the thermal spray coating is not formed on the seat surface of the thermal spray nut, rust occurs on the non-thermal spray (non-processed) seat surface of the thermal spray nut before fastening. There is a fear. Furthermore, in the sprayed fastener of Patent Document 1, the non-sprayed (non-processed) seating surface of the sprayed nut comes into contact with the sprayed coating of the second washer, and the sliding performance of the sprayed nut is low.

JP 2010-276124 A

  The present invention has been made in view of the problems as described above, and before the tightening, it is possible to prevent the sprayed nut from generating rust, and the frictional force when tightening the sprayed nut is reduced than before, It is an object of the present invention to provide a thermal spray fastener, a thermal spray nut, and a method for manufacturing the thermal spray fastener that can obtain the axial force required when the thermal spray nut has high sliding performance and is easily tightened with a predetermined tightening torque. To do.

The thermal spray fastener according to the present invention is for fastening a fastened body on which a thermal spraying process is performed and a thermal spray coating is formed . Specifically, the thermal spray fastener is fastened to the screw portion of the thermal spray bolt with the thermal spray bolt applied to at least the screw portion to form the thermal spray coating, the contact surface on the fastened body side, and the fastened body. An inner screw portion and an outer casing surface that is a surface other than the contact surface and the inner screw portion, and a thermal spray nut formed by thermal spraying treatment on the contact surface and the outer casing surface, In the thermal spray nut, a lubricant is applied only on the thermal spray coating on the contact surface and the inner thread portion to form a lubricating layer.

  Furthermore, the first sealing treatment may be applied to the thermal spray coating of the thermal spray nut so that the first sealing treatment is performed. Furthermore, a second sealing agent may be applied to the sprayed coating on the outer casing surface that has been subjected to the first sealing process of the sprayed nut, so that the second sealing process is performed. Further, a top coat layer may be formed by applying a top coat onto the spray coating on the outer casing surface that has been subjected to the second sealing treatment of the spray nut. As a result, it is possible to further prevent the sprayed nut from being rusted before tightening.

  Furthermore, you may make it provide the thermal spray washer arrange | positioned between a thermal spray nut and a to-be-fastened body. Further, the thermal spray washer has a contact surface on the thermal spray nut side, a bolt hole through which the thermal spray bolt is inserted, and an outer casing surface that is a surface other than the contact surface and the bolt hole, and the entire surface is subjected to thermal spraying. Then, a sprayed coating is formed, and a lubricant layer may be formed by applying a lubricant on the sprayed coating on the contact surface. As a result, the frictional force when tightening the thermal spray nut is reduced compared to the conventional case, smoother sliding of the thermal spray nut can be secured, and the axial force required when tightening with the predetermined tightening torque is ensured. Can be obtained.

Moreover, the thermal spray nut which concerns on this invention fastens the to- be-fastened body in which the thermal spraying process was performed and the thermal spray coating was formed with the thermal spray bolt. Specifically, the thermal spray nut includes a contact surface on the fastened body side, an inner screw portion that is fastened to a screw portion of the thermal spray bolt across the fastened body, and an outer casing surface that is a surface other than the contact surface and the inner screw portion. A thermal spray coating is formed on the contact surface and the outer casing surface, and a lubricant is applied only on the thermal spray coating on the contact surface and the inner thread portion to form a lubrication layer. Yes.

  Furthermore, a first sealing treatment agent may be applied to the thermal spray coating to perform a first sealing treatment. Furthermore, a second sealing agent may be applied to the sprayed coating on the outer casing surface that has been subjected to the first sealing treatment, so that the second sealing treatment is performed. Furthermore, a top coating layer may be formed by applying a top coating on the sprayed coating on the outer casing surface that has been subjected to the second sealing treatment. As a result, it is possible to further prevent the sprayed nut from being rusted before tightening.

In addition, a method for manufacturing a thermal spray nut for fastening a fastened body on which a thermal spraying process is performed and a thermal spray coating according to the present invention is fastened together with a thermal spray bolt includes a contact surface on the fastened body side and a thermal spray bolt sandwiching the fastened body. A thermal spray coating is applied to the contact surface and the outer casing surface of the thermal spray nut having an inner thread portion to be tightened to the screw portion and an outer casing surface which is a surface other than the contact surface and the inner screw portion to form a thermal spray coating. Then, a lubricant is applied only on the sprayed coating on the contact surface and the inner thread portion to form a lubricating layer.

  Furthermore, you may make it apply | coat a 1st sealing agent to a sprayed coating, and may perform a 1st sealing process. Further, the second sealing treatment may be performed by applying a second sealing agent to the sprayed coating on the outer casing surface that has been subjected to the first sealing treatment. Further, a top coat layer may be formed by applying a top coat onto the sprayed coating on the outer casing surface that has been subjected to the second sealing treatment. As a result, it is possible to further prevent the sprayed nut from being rusted before tightening.

  In the present invention, the seating surface and the outer casing surface of the sprayed nut are sprayed to form a sprayed coating, the sprayed coating is sealed, and a lubricating layer is formed on the inner screw portion. . Therefore, according to the present invention, it is possible to prevent the sprayed nut from being rusted before tightening.

  Furthermore, in the present invention, a lubricating layer is formed on the inner thread portion of the sprayed nut. Therefore, in the present invention, even if a thermal spray coating is formed on the screw portion of the thermal spray bolt, this lubricating layer reduces the frictional force when tightening the thermal spray nut as compared with the conventional case, and ensures smooth sliding of the thermal spray nut. Can have excellent sliding performance. Therefore, according to the present invention, it is possible to more easily tighten to the end with a predetermined tightening torque than before, and it is possible to reliably obtain the axial force required when tightening with the predetermined tightening torque.

  Furthermore, in the present invention, a lubricating layer is formed on the sprayed coating on the seating surface of the sprayed nut. Accordingly, in the present invention, while preventing rust from being generated on the sprayed nut before tightening, the lubricating layer prevents the rust from being generated before tightening. Even if the thermal spray coating is formed on both the surface and the surface that comes into contact with the surface, the frictional force when tightening the thermal spray nut is reduced compared to the conventional method, ensuring smooth sliding of the thermal spray nut, and excellent sliding performance. Can have. Therefore, according to the present invention, it is possible to more easily tighten to the end with a predetermined tightening torque than before, and it is possible to reliably obtain the axial force required when tightening with the predetermined tightening torque.

It is a side view which shows the thermal spray fastener to which this invention is applied. It is a side view which shows the state which decomposed | disassembled the thermal spray fastener to which this invention is applied. It is a cross-sectional view showing a thermal spray fastener to which the present invention is applied. It is process drawing which shows the manufacturing method of a thermal spray nut. It is process drawing which shows the manufacturing method of a thermal spray washer.

  Hereinafter, a thermal spray fastener, a thermal spray nut, and a manufacturing method thereof to which the present invention is applied will be described with reference to the drawings.

<1. Overall configuration>
As shown in FIGS. 1 and 2, the thermal spray fastener 1 to which the present invention is applied is for connecting, for example, a steel structure 101 as a body to be fastened 100 and attachment plates 102 and 103 together. belongs to. Specifically, the thermal spray fastener 1 includes a thermal spray bolt 2, a thermal spray nut 3, and thermal spray washers 4 and 5.

  As shown in FIG. 3, the steel structure 101 and the attachment plates 102 and 103 are made of Al-Mg alloy as a thermal spray material in the surface and the bolt holes 101a, 102a and 103a for inserting the thermal spray bolt 2. Thermal spraying is performed to form Al—Mg alloy thermal spray coatings 101b, 102b, 103b.

<2. Thermal spray bolt>
As shown in FIGS. 1 and 2, the thermal spray bolt 2 is a hexagonal bolt having a head portion 2a and a shaft portion 2b and having a screw portion 2c formed on a part or the entire surface of the shaft portion 2b. The object 101 and the attachment plates 102 and 103 are inserted into the bolt holes 101a, 102a and 103a. As shown in FIG. 3, such a thermal spray bolt 2 is subjected to thermal spraying treatment using an Al—Mg alloy as a thermal spray material to form an Al—Mg alloy thermal spray coating 10. In addition, the thermal spray coating 10 should just be formed in the screw part 2c at least.

<3. Thermal spray nut>
As shown in FIGS. 1 and 2, the thermal spray nut 3 is a seated hexagon nut that is fastened to the screw portion 2 c of the thermal spray bolt 2 with the steel structure 101 and the attachment plates 102 and 103 interposed therebetween, for example. As shown in FIG. 3, such a sprayed nut 3 has a diameter smaller than the hexagonal two-sided width and is fastened to a seating surface 3 a serving as a contact surface with the fastened body 100 and a screw portion 2 c of the sprayed bolt 2. It has a screw portion 3b and an outer casing surface 3c that is a surface other than the seat surface 3a and the inner screw portion 3b.

  Further, as shown in FIG. 3, the seating surface 3a and the outer casing surface 3c of the thermal spray nut 3 are subjected to thermal spraying treatment using an Al—Mg alloy as a thermal spray material, and an Al—Mg alloy thermal spray coating 20a, 20c is formed. Further, the spray coatings 20a and 20c on the seat surface 3a and the outer casing surface 3c are coated with a first sealing agent obtained by diluting an enamel paint at a first dilution rate, and the spray coatings 20a and 20c. A first sealing treatment is performed to seal the fine holes on the surface.

  Further, for the thermal spray coating 20c on the outer casing surface 3c that has been subjected to the first sealing treatment, an enamel paint similar to that used in the first sealing treatment is used in a second dilution ratio that is darker than the first dilution ratio. The second sealing treatment diluted with (1) is applied, and a second sealing treatment is applied to further smooth the surface sealed by the first sealing treatment. Further, a molybdenum-based lubricant is applied on the sprayed coating 20a and the inner threaded portion 3b of the seat surface 3a that has been subjected to the first sealing treatment, thereby forming lubricating layers 21a and 21b. Further, a top coating layer 22 is formed by applying a top coating on the sprayed coating 20c on the outer casing surface 3c subjected to the second sealing treatment.

<4. Thermal spray washer>
As shown in FIGS. 1 and 2, the thermal spray washer 4 is disposed between the head 2 a of the thermal spray bolt 2 and the fastened body 100 (attachment plate 102). Specifically, the thermal spray washer 4 includes an outer casing which is a contact surface 4a that contacts the head 2a of the thermal spray bolt 2, a bolt hole 4b through which the thermal spray bolt 2 is inserted, and a surface other than the contact surface 4a and the bolt hole 4b. Surface 4c. As shown in FIG. 3, such a sprayed washer 4 is subjected to a spraying process using an Al—Mg alloy as a spraying material, as in the case of the seating surface 3 a and the outer casing surface 3 c of the spraying nut 3. A sprayed coating 30 of Al-Mg alloy is formed.

  As shown in FIGS. 1 and 2, the thermal spray washer 5 is disposed between the thermal spray nut 3 and the fastened body 100 (the attachment plate 103). Specifically, the thermal spray washer 5 includes a contact surface 5a that contacts the thermal spray nut 3, a bolt hole 5b through which the thermal spray bolt 2 is inserted, and an outer casing surface 5c that is a surface other than the contact surface 5a and the bolt hole 5b. Have. As shown in FIG. 3, such a sprayed washer 5 is subjected to a spraying process using an Al—Mg alloy as a spraying material, similarly to the seating surface 3 a and the outer casing surface 3 c of the spraying nut 3. An Al—Mg alloy sprayed coating 40 is formed. Further, the thermal spray coating 40 is subjected to a first sealing treatment in the same manner as the seat surface 3a and the outer casing surface 3c of the thermal spray nut 3. Further, the thermal spray coating 40 subjected to the first sealing process is subjected to the second sealing process in the same manner as the seat surface 3a and the outer casing surface 3c of the thermal spray nut 3.

  Further, as shown in FIG. 3, a molybdenum-based lubricant is applied on the thermal spray coating 40 on the contact surface 5a subjected to the second sealing treatment, as in the case of the seat surface 3a and the inner screw portion 3b of the thermal spray nut 3. The lubricating layer 21c is formed by application. Specifically, the lubricating layer 21 c is formed in a range that does not protrude from the sprayed nut 3, that is, in a range that overlaps the sprayed nut 3 when the fastened body 100 is fastened together. Therefore, when the fastened body 100 is fastened together with the thermal spray fastener 1, the lubricating layer 21c is hidden by the thermal spray nut 3 and cannot be visually recognized from the outside, and the aesthetics can be improved. The lubricating layer 21c may be formed on the entire surface of the thermal spray coating 40 on the contact surface 5a.

<5. Manufacturing method of sprayed nut>
Next, a manufacturing method for manufacturing the thermal spray nut 3 having the above-described configuration will be described.

  First, as shown in FIGS. 3 and 4, the seating surface 3a and the outer casing surface 3c of the spraying nut 3 are subjected to a thermal spraying process using an Al—Mg alloy as a spraying material, and the seating surface 3a and the outer casing surface 3c are subjected to a thermal spraying process. The Al—Mg alloy sprayed coatings 20a and 20c are formed. Next, a first sealing agent obtained by diluting enamel paint at a first dilution rate is applied to the sprayed coatings 20a and 20c on the seat surface 3a and the outer casing surface 3c, and the surface of the sprayed coatings 20a and 20c is coated. A first sealing process for sealing the fine holes is performed.

  Next, an enamel paint similar to that used in the first sealing process is diluted with a second dilution ratio higher than the first dilution ratio on the sprayed coating 20c on the outer casing surface 3c subjected to the first sealing process. The second sealing treatment is applied, and a second sealing treatment is applied to further level the surface sealed by the first sealing treatment. Next, a molybdenum-based lubricant is applied onto the sprayed coating 20a and the inner threaded portion 3b of the seat surface 3a that has been subjected to the first sealing treatment, thereby forming the lubricating layers 21a and 21b. Next, a top coating layer 22 is formed by applying a top coating on the sprayed coating 20c on the outer casing surface 3c subjected to the second sealing treatment. The sprayed nut 3 is manufactured as described above.

  Note that the lubricating layers 21a and 21b may be formed on the thermal spray coating 20a and the inner screw portion 3b of the seat surface 3a before the second sealing process is performed on the thermal spray coating 20c of the outer casing surface 3c. Furthermore, it is not necessarily limited to forming the top coat layer 22 on the thermal spray coating 20c of the outer casing surface 3c subjected to the second sealing treatment. Further, the coating layer 22 is not necessarily limited to the second sealing process performed on the thermal spray coating 20c on the outer casing surface 3c that has been subjected to the first sealing process. Furthermore, you may make it perform a 2nd sealing process also to the sprayed coating 20a of the seat surface 3a.

<6. Manufacturing method of sprayed washer>
Next, a manufacturing method for manufacturing the thermal spray washer 5 having the above-described configuration will be described.

  First, as shown in FIGS. 3 and 5, the entire surface of the sprayed washer 5, that is, the contact surface 5 a, the bolt hole 5 b, and the outer casing surface 5 c is subjected to a thermal spraying process using an Al—Mg alloy as a thermal spray material. -The thermal spray coating 40 of Mg alloy is formed.

  Next, a first sealing treatment is applied to the thermal spray coating 40 by applying a first sealing agent obtained by diluting an enamel paint at a first dilution rate to seal micropores on the surface of the thermal spray coating 40. . Next, a second sealing hole obtained by diluting the thermal spray coating 40 subjected to the first sealing process with an enamel-based paint similar to that used in the first sealing process at a second dilution ratio higher than the first dilution ratio. A treatment agent is applied, and a second sealing process is performed to further level the surface sealed by the first sealing process.

  Next, a molybdenum-based lubricant is applied on the thermal spray coating 40 on the contact surface 5a that has been subjected to the second sealing treatment, thereby forming a lubricating layer 21c. At this time, the lubrication layer 21 is formed within a range in which the range and amount of the molybdenum-based lubricant applied are adjusted so that the sprayed nut 3 does not protrude from the sprayed nut 3 when the fastened body 100 is fastened together. The The sprayed washer 5 is manufactured as described above.

<7. Effect>
As described above, in the thermal spray fastener 1 to which the present invention is applied, the thermal spraying treatment is applied to the entire surface of the thermal spray bolt 2 and the thermal spray washers 4 and 5 to form the thermal spray coatings 10, 30, and 40. 30 and 40 are sealed. Further, the thermal spray fastener 1 is subjected to a thermal spraying process on the seat surface 3a and the outer casing surface 3c of the thermal spray nut 3 to form thermal sprayed coatings 20a and 20c, and further, a sealing process is applied to the thermal sprayed coatings 20a and 20c. The lubricating layer 21a is formed on the inner screw portion 3b. Therefore, according to the thermal spray fastener 1, it is possible to prevent rust from being generated on the thermal spray bolt 2, the thermal spray nut 3, and the thermal spray washers 4 and 5 before tightening. In particular, it is possible to prevent the sprayed nut 3 from being rusted before being tightened as in the prior art.

  Further, the thermal spray fastener 1 has a lubricating layer 21 b formed on the inner thread portion 3 b of the thermal spray nut 3. Therefore, in the thermal spray fastener 1, even if the thermal spray coating 10 is formed on the screw portion 2c of the thermal spray bolt 2, the lubricating layer 21b reduces the frictional force when tightening the thermal spray nut 3 as compared with the prior art, and the thermal spray nut. 3 can be ensured to have smooth sliding performance. Therefore, according to the thermal spray fastener 1, it can be more easily tightened to the end with a predetermined tightening torque than in the prior art, and the axial force required when tightening with the predetermined tightening torque can be reliably obtained.

  Further, in the thermal spray fastener 1, a lubricating layer 21 a is formed on the thermal spray coating 20 a on the seat surface 3 a of the thermal spray nut 3. Therefore, in the thermal spray fastener 1, while preventing the rust from being generated on the thermal spray nut 3 before tightening, the lubricating layer 21a prevents the rust from being generated before the tightening. Even if the thermal spray coatings 20a and 40 are formed on both the seat surface 3a and the contact surface 5a of the thermal spray washer 5 that contacts the seat surface 3a, the frictional force when tightening the thermal spray nut 3 is reduced, and the thermal spray nut 3 is smooth. Smooth sliding can be secured, and excellent sliding performance can be obtained. Therefore, according to the thermal spray fastener 1, it can be more easily tightened to the end with a predetermined tightening torque than in the prior art, and the axial force required when tightening with the predetermined tightening torque can be reliably obtained.

  Further, in the thermal spray fastener 1, a lubricating layer 21 c is formed on the thermal spray coating 40 on the contact surface 5 a of the thermal spray washer 5. Therefore, in the thermal spray fastener 1, the frictional force at the time of tightening the thermal spray nut 3 is further reduced by the lubrication layer 21c than when the lubricant layer 21a is formed only on the seat surface 3a of the thermal spray nut 3. Smooth sliding of the sprayed nut 3 can be ensured, and more excellent sliding performance can be achieved. Therefore, according to the thermal spray fastener 1, it can be more easily tightened to the end with a predetermined tightening torque than before, and the axial force required when tightening with the predetermined tightening torque can be more reliably obtained.

<8. Modification>
The thermal spray fastener 1 includes the thermal spray bolt 2, the thermal spray nut 3, and the thermal spray washers 4 and 5, but is not limited to this, and either or both of the thermal spray washers 4 and 5 are omitted. You can also do it. Similarly in this case, in the thermal spray fastener 1, the lubricating layer 21 b is formed on the inner thread portion 3 b of the thermal spray nut 3, and the lubricating layer 21 a is formed on the seat surface 3 a of the thermal spray nut 3. By 21a and 21b, the frictional force at the time of fastening the thermal spray nut 3 can be reduced, smooth sliding of the thermal spray nut 3 can be ensured, and excellent sliding performance can be obtained. Therefore, the thermal spray fastener 1 can be tightened to the end with a predetermined tightening torque more easily than in the past, and the axial force required when tightening with the predetermined tightening torque can be reliably obtained.

  Further, in the thermal spray fastener 1, the Al—Mg alloy sprayed coating 10, 20, 30, 40 is formed by using an Al—Mg alloy as the thermal spray material, but the present invention is not limited to this. Any material may be used as long as it is generally used as a thermal spray material such as aluminum or an alloy thereof.

  Further, in the thermal spray fastener 1, a material obtained by diluting an enamel paint is used as the sealing agent, but the present invention is not limited to this. Anything can be used.

  Furthermore, in the thermal spray fastener 1, a molybdenum-based lubricant is applied to form a lubricating layer. However, the present invention is not limited to this, and any other generally used lubricant such as fluorine may be used. Anything can be used. Further, a lubricating layer made of a different lubricant may be formed by the seating surface 3 a of the sprayed nut 3, the inner screw portion 3 b and the contact surface 5 a of the sprayed washer 5.

  Further, the thermal spray bolt 2 is not limited to a hexagon bolt, and any bolt may be used.

  Further, the sprayed nut 3 is not limited to a seated hex nut, and may be any nut such as a hex nut having no seating surface 3a. In this case, similarly to the seat surface 3a, the Al—Mg alloy sprayed coating 20a is formed on the contact surface in contact with the fastened body 100 instead of the seat surface 3a, and the first sealing treatment is performed. Lubricating layer 21a is formed.

  Furthermore, the thermal spray fastener 1 is not limited to the one in which the steel structure 101 and the attachment plates 102 and 103 are connected together, and the fastened body 100 to be fastened may be any type. .

DESCRIPTION OF SYMBOLS 1 Thermal spray fastener, 2 Thermal spray bolt, 2a head, 2b trunk | drum, 2c Screw part, 3 Sprayed nut, 3a Seat surface, 3b Inner screw part, 3c Outer casing surface, 4 Thermal spray washer, 4a Contact surface, 4b Bolt hole 4c Outer casing surface, 5 Thermal spray washer, 5a Contact surface, 5b Bolt hole, 5c Outer casing surface, 10 Thermal spray coating, 20a Thermal spray coating, 20c Thermal spray coating, 21a Lubrication layer, 21b Lubrication layer, 21c Lubrication layer, 22 Top coat Layer, 30 Thermal spray coating, 40 Thermal spray coating, 100 Fastened object, 101 Steel structure, 101a Bolt hole, 101b Thermal spray coating, 102 Adhering plate, 102a Bolt hole, 102b Thermal spray coating, 103 Adhering plate, 103a Bolt hole, 103b Thermal spray coating

Claims (13)

In the thermal spray fastener for fastening the object to be fastened in which the thermal spray treatment is performed and the thermal spray coating is formed ,
A thermal spray bolt in which a thermal spray treatment is applied to at least the screw portion and a thermal spray coating is formed;
A contact surface on the fastened body side, an inner screw portion fastened to a screw portion of the thermal spray bolt across the fastened body, and an outer casing surface that is a surface other than the contact surface and the inner screw portion A thermal spraying nut formed by thermal spraying on the contact surface and the outer casing surface,
The thermal spray fastener according to claim 1, wherein a lubricant layer is formed by applying a lubricant only on the thermal spray coating on the contact surface and on the inner thread portion.   The thermal spray fastener according to claim 1, wherein the thermal spray coating of the thermal spray nut is coated with a first sealing agent and subjected to a first sealing treatment.   The thermal spray coating on the outer casing surface subjected to the first sealing treatment of the thermal spray nut is further coated with a second sealing agent to be subjected to a second sealing treatment. Item 3. The thermal spray fastener according to Item 2.   4. The thermal spraying according to claim 3, wherein a top coating layer is further formed by applying a top coating on the thermal spray coating on the outer casing surface subjected to the second sealing treatment of the thermal spray nut. Fasteners. Furthermore, it comprises a thermal spray washer arranged between the thermal spray nut and the fastened body,
The sprayed washer has a contact surface on the sprayed nut side, a bolt hole through which the sprayed bolt is inserted, and an outer casing surface which is a surface other than the contact surface and the bolt hole, and is sprayed on the entire surface thereof. 5. A thermal spray coating is formed by treatment, and a lubricant is formed on the thermal spray coating on the contact surface to form a lubricant layer. The thermal spray fastener according to claim 1. In the thermal spray nut that fastens the object to be fastened to which the thermal spray treatment is applied and the thermal spray coating is formed together with the thermal spray bolt,
A contact surface on the fastened body side, an inner screw portion that is fastened to a screw portion of the thermal spray bolt across the fastened body, and an outer casing surface that is a surface other than the contact surface and the inner screw portion,
The contact surface and the outer casing surface are subjected to a thermal spraying process to form a thermal spray coating,
A thermal spray nut, wherein a lubricant layer is formed by applying a lubricant only on the thermal spray coating on the contact surface and the inner screw portion.   The thermal spray nut according to claim 6, wherein a first sealing treatment agent is applied to the thermal spray coating to perform a first sealing treatment.   8. The thermal spray coating on the outer casing surface that has been subjected to the first sealing treatment is further subjected to a second sealing treatment by applying a second sealing agent. Sprayed nut.   9. The thermal spray nut according to claim 8, wherein an overcoat is further formed on the thermal spray coating on the outer casing surface that has been subjected to the second sealing treatment. In the manufacturing method of the thermal spray nut which fastens the to- be-fastened body in which the thermal spraying process was performed and the thermal spray coating was formed with the thermal spray bolt,
Thermal spraying having a contact surface on the fastened body side, an inner screw portion that is fastened to a screw portion of the thermal spray bolt across the fastened body, and an outer casing surface that is a surface other than the contact surface and the inner screw portion The contact surface of the nut and the outer casing surface are subjected to a thermal spraying process to form a thermal spray coating,
Next, a method for producing a thermal spray nut, wherein a lubricant layer is formed by applying a lubricant only on the thermal spray coating on the contact surface and the inner thread portion.   The method for producing a thermal spray nut according to claim 10, wherein a first sealing treatment is applied to the thermal spray coating to apply a first sealing treatment.   The thermal spray nut according to claim 11, wherein a second sealing treatment is further applied to the thermal spray coating on the outer casing surface subjected to the first sealing treatment to apply a second sealing treatment. Manufacturing method.   13. The thermal spray nut manufacturing method according to claim 12, further comprising applying a top coating agent to the thermal spray coating on the outer casing surface subjected to the second sealing treatment to form a top coating layer.

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