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Endless metal belt and its manufacturing method

A metal belt and ring technology, applied in the direction of V-belt, manufacturing tools, metal processing equipment, etc., can solve the problems of ring end face wear, difficult nitriding treatment, low wear resistance of stainless steel, etc.

Active Publication Date: 2021-04-13
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, stainless steel usually contains more than 10% Cr, so nitriding treatment is difficult
Therefore, the wear resistance of stainless steel is low, especially in the presence of the neck 13 with the sheet metal (see figure 1 ) The problem of wear on the contact ring end face

Method used

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  • Endless metal belt and its manufacturing method
  • Endless metal belt and its manufacturing method
  • Endless metal belt and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0073]

[0074] A long maraging steel plate was prepared, and the metal ring 1 with a thickness of about 180 μm and a Young's modulus of 190 GPa was manufactured according to the above-mentioned manufacturing steps of the metal ring.

manufacture example 2

[0075]

[0076] Prepare by mass % 0.30% to 0.70% of C, 2.50% or less of Si, 1.00% or less of Mn, 1.00% to 4.00% of Cr, 0.50% to 3.00% of Mo, and 1.00% or less of V, satisfying formula 1 : 159×C(%)+91×Si(%)+68×Cr(%)+198×Mo(%)+646≥1000 and the remaining part is a long metal plate of Fe, according to the aforementioned metal The manufacturing process of the ring is to manufacture the metal ring 2 with a thickness of about 185 μm, a thickness of the nitrided layer of 30 μm, a tensile strength of 1700 MPa or more, a surface hardness of the nitrided layer of HV800-HV950, and a Young’s modulus of 210 GPa.

[0077]

[0078] The metal ring 1 of Production Example 1 was used as the innermost layer, and eight metal rings 2 were stacked on the outer periphery of the metal ring 1 to obtain a nine-layer belt member. Use 2 parts of this strap, such as figure 1 and figure 2 As shown, the metal sheet is configured to obtain the endless metal belt of the embodiment.

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Abstract

The invention provides an endless metal belt and a manufacturing method thereof. The endless metal belt can sufficiently reduce the tensile stress on the innermost metal ring, and has excellent wear resistance. The endless metal belt includes: a belt member formed by laminating a plurality of metal rings; and a metal sheet supported by the belt member, the innermost metal ring of the plurality of metal rings is a maraging steel plate, and other metal The ring has a nitride layer on the surface, and has the following chemical composition: by mass %, it contains 0.30% to 0.70% of C, 2.50% or less of Si, 1.00% or less of Mn, 1.00% to 4.00% of Cr, 0.50% to 3.00% Mo and less than 1.00% V satisfy the relationship of Formula 1: 159×C(%)+91×Si(%)+68×Cr(%)+198×Mo(%)+646≥1000, and The remainder is composed of Fe and unavoidable impurities, the tensile strength of the other metal ring is above 1700 MPa, and the surface hardness of the nitride layer is HV800-HV950.

Description

technical field [0001] The present invention relates to endless metal belts and methods for their manufacture. Background technique [0002] As a continuously variable transmission (CVT), a belt type CVT is known. As a power transmission belt for a belt-type CVT, there is known an endless metal belt composed of a belt member composed of laminated metal rings and a plurality of metal sheets supported by the belt member. [0003] The belt member is subjected to tension, bending stress, friction, etc. during power transmission. Therefore, belt members and metal rings constituting the belt members are required to have properties such as strength and friction resistance, and various studies have been conducted for this purpose. [0004] Maraging steel having high strength and toughness is known as one of materials of metal rings for belt members (for example, JP-A-61-17743). However, maraging steel contains a large amount of Ni, Co, Mo, etc., and is expensive, so alternative m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB65G15/48B23P15/00C21D1/18C21D1/26C21D6/004C21D6/005C21D6/007C21D6/008C21D9/52C22C38/002C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24C22C38/34C22C38/44C22C38/46C22C38/50C22C38/52C23C8/26F16G1/21F16G1/24B21D5/14C21D1/00C21D1/06C21D6/02C21D9/40C22C38/00F16G5/16B21D53/16B29D29/00F16G1/22F16G5/22B21D53/14
Inventor 永宫清美西田幸司前川佳大西谷伸也
Owner TOYOTA JIDOSHA KK