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Powder metallurgy material for preparing synchronizer gear hub

A powder metallurgy and synchronizer technology, which is applied in the field of synchronizer preparation, can solve the problems that affect the application and development of powder metallurgy gear hubs, the performance of the synchronizer gear hubs cannot reach high performance, and the structure and shape of the synchronizer gear hubs are complex, etc., to achieve Good interface ionization effect, high metallographic transformation stability, and good lubricating effect

Pending Publication Date: 2021-11-16
浙江迅达工业科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex structure and shape of the synchronizer hub, the inner cavity has multiple shoulders, and the high accuracy of geometric dimensions, it has brought great difficulties to the production of powder metallurgy pressing and sintering, and the performance of the produced synchronizer hub is not up to the standard. To meet the high performance requirements, especially the synchronizer gear hub for cars, it is even more difficult to apply, which greatly affects the application and development of powder metallurgy gear hubs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A powder metallurgy material for the preparation of a synchronizer gear hub, comprising the following components: nanoscale prefabricated alloy powder, molybdenum powder, graphite powder, metal carbide powder, additives, iron powder, wherein the nanoscale prefabricated alloy powder is Cu- Ni-Si-RE prefabricated alloy powder, metal carbide powder is Co / Ti carbide.

[0027] The powder metallurgy material for the preparation of the synchronizer gear hub, the mass percentage of each component is 4% of nano-scale prefabricated alloy powder, 0.2% of molybdenum powder, 0.8% of graphite powder, 0.6% of metal carbide powder, 0.7% of additive, Iron powder balance.

[0028] Specifically, the mass content of each element in the nano-scale prefabricated alloy powder is 40% Cu, 35% Ni, 20% Si, and 5% RE, and RE is an equal composition of lanthanum and scandium.

[0029] The preparation method of nano-scale prefabricated alloy powder is to prepare Cu-Ni metal salt colloidal solution,...

Embodiment 2

[0035]A powder metallurgy material for the preparation of a synchronizer gear hub, comprising the following components: nanoscale prefabricated alloy powder, molybdenum powder, graphite powder, metal carbide powder, additives, iron powder, wherein the nanoscale prefabricated alloy powder is Cu- Ni-Si-RE prefabricated alloy powder, metal carbide powder is Co / Ti carbide.

[0036] The powder metallurgy material for the preparation of the synchronizer gear hub, the mass percentage of each component is, nano-scale prefabricated alloy powder 2%, molybdenum powder 0.4%, graphite powder 0.6%, metal carbide powder 0.4%, additives 0.8%, Iron powder balance.

[0037] The mass content of each element in the nanoscale prefabricated alloy powder is 45% Cu, 30% Ni, 18% Si, and 7% RE, and RE is an equal composition of lanthanum and scandium.

[0038] The preparation method of nano-scale prefabricated alloy powder is to prepare Cu-Ni metal salt colloidal solution, prepare nano-metal particles...

Embodiment 3

[0044] A powder metallurgy material for the preparation of a synchronizer gear hub, comprising the following components: nanoscale prefabricated alloy powder, molybdenum powder, graphite powder, metal carbide powder, additives, iron powder, wherein the nanoscale prefabricated alloy powder is Cu- Ni-Si-RE prefabricated alloy powder, metal carbide powder is Co / Ti carbide.

[0045] Powder metallurgy materials for the preparation of synchronizer gear hubs, the mass percentage of each component is: nano-scale prefabricated alloy powder 3%, molybdenum powder 0.1%, graphite powder 0.5%, metal carbide powder 0.6%, additives 0.5%, Iron powder balance.

[0046] The mass content of each element in the nano-scale prefabricated alloy powder is 30% Cu, 35% Ni, 25% Si, 10% RE, and RE is lanthanum.

[0047] The preparation method of nano-scale prefabricated alloy powder is to prepare Cu-Ni metal salt colloidal solution, prepare nano-metal particles by radiation method, and set aside; take si...

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Abstract

The invention provides a powder metallurgy material for preparing a synchronizer gear hub. The powder metallurgy material comprises the following components: nanoscale prefabricated alloy powder, molybdenum powder, graphite powder, metal carbide powder, an additive and iron powder; the nanoscale prefabricated alloy powder is Cu-Ni-Si-RE prefabricated alloy powder; and the metal carbide powder is Co / Ti carbide. Powder metallurgy compositions are reasonably compounded, raw material selection is optimized, powder materials have excellent dispersity, the pressing uniformity is good, the structure is uniform and compact, mechanical properties are stable and improved, the surface is free of cracks and spots, the precision grade can reach level IT5-7, comprehensive benefits are higher, and the material is worthy of application and popularization.

Description

technical field [0001] The invention relates to the technical field of synchronizer preparation, in particular to a powder metallurgy material for the preparation of a synchronizer hub. Background technique [0002] The shifting of the old-fashioned transmission adopts the "two-leg clutch" method, and the upshift stays in the neutral position for a while (but the clutch needs to be lifted up, the purpose is to synchronize the clutch plate with the flywheel, and the speed must be consistent before the gear can be smoothly shifted , if the gear shifting is slow and the speed drops to idle speed, it cannot be engaged), the downshift should be in the neutral position (while keeping the clutch lifted) and the gas pedal is increased to reduce the speed difference of the gears. But this operation is more complicated and difficult to master accurately. Therefore, the designer created a "synchronizer", through which the gears to be meshed can reach a consistent speed and mesh smooth...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F5/08C22C33/02B22F9/24
CPCB22F5/08C22C33/0228C22C33/0264B22F9/24Y02P10/25
Inventor 陈少武
Owner 浙江迅达工业科技股份有限公司
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