Casting method of bi-metal for plunger pump rotor

A plunger pump, bimetal technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of restricting the production and application of bimetal composite casting materials, short metal contact time, fast cooling speed, etc. Heat treatment process, improved compounding ability, excellent performance effect

Inactive Publication Date: 2018-02-23
安徽恒利增材制造科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Bimetallic composite casting materials, due to the synthesis of casting method, simple process and low cost, have great application prospects, but the contact time of the two metals during the casting process is short and the cooling speed is fast, which seriously affects the combination of the two. Become a bottleneck restricting the production and application of bimetallic composite casting materials

Method used

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Embodiment Construction

[0027] The technical solutions in the present invention are clearly and completely described below in conjunction with the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] A bimetal casting method for a plunger pump rotor, comprising the following steps:

[0029] Step 1: Turning, milling, planing, grinding, drilling, and boring the steel substrate. The steel substrate is a cylinder. A central hole is provided in the center of the steel substrate, and 9 circular holes are arranged around the central hole. Equipped with a metal lower cover;

[0030] Step 2: Clean the steel substrate with 15% NaOH aqueous solution, rinse with distilled water until neutral, then use 10% HCl aqueous solution to derust, then rinse with distilled water until neutral, dry and place in a dry place to be used in the envi...

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Abstract

The invention provides a casting method of bi-metal for a plunger pump rotor and belongs to the technical field of bi-metal casting. The casting method comprises the following steps: machining a steelsubstrate; pretreating the steel substrate; carrying out a heat-treatment annealing process on the steel substrate; carrying out Ni-Cu-P multi-component nickel plating on the inner surface of the steel substrate; preheating the steel substrate; smelting a lead-tin bronze alloy; casting the lead-tin bronze alloy; and machining the plunger pump rotor. A bi-metal binding surface obtained by adoptingthe casting method provided by the invention has the advantages that not only do the properties reach the standards, but also the equipment investment is low, the process operation is simple and convenient, and the workpiece cost is reduced; the casting method is suitable for extensive popularization and application, and has broad prospects; and compared with a powder metallurgy method, the casting method has the advantages that the performance is superior, the heat treatment procedure is eliminated, the time is saved, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of bimetal casting, and in particular relates to a bimetal casting method for a plunger pump rotor. Background technique [0002] Piston pump is a kind of transmission machinery widely used in production and an important device of hydraulic system. It relies on the reciprocating movement of the plunger in the cylinder to change the volume of the sealed working chamber to realize oil absorption and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment. It is widely used in high pressure, large flow and flow adjustment occasions, such as hydraulic presses, engineering machinery and transportation machinery. The plunger and the rotor form a friction pair during work, and its quality determines the performance and life of the plunger pump. Production requires that the plunger pump tends to operate at high speed, high temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/16C21D1/26C23C30/00
CPCB22D19/16C21D1/26C23C30/005
Inventor 夏建强常峰
Owner 安徽恒利增材制造科技有限公司
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