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Machining method of copper magnesium alloy casting

A copper-magnesium alloy and machining technology, applied in the field of machining, can solve the problems of large machining deformation, incomplete stress release of castings, low machining yield, etc., and achieve the effect of avoiding fracture

Inactive Publication Date: 2018-05-04
朱旭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a mechanical processing method of copper-magnesium alloy castings to solve the technical problems of large processing deformation and low processing yield due to incomplete internal stress release of the existing copper-magnesium alloy castings in the existing mechanical processing methods of copper-magnesium alloy castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) First heat the copper-magnesium alloy casting to 300-350°C and maintain it for 5-10 minutes;

[0017] (2) Rapidly lower the temperature of the copper-magnesium alloy casting to 150-200°C within half a minute, and maintain it within the temperature range of 150-200°C for 20-25 minutes;

[0018] (3) After rapidly heating the copper-magnesium alloy casting to 250-300°C within half a minute, perform machining within the temperature range of 250-300°C.

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Abstract

The invention provides a machining method of a copper magnesium alloy casting and relates to the technical field of machining. The method comprises the following steps that (1) the copper magnesium alloy casting is heated to 300-350 DEG C, and the temperature is maintained for 5-10 min; (2) the temperature of the copper magnesium alloy casting is rapidly decreased to 150-200 DEG C in half minute,and the temperature range of 150-200 DEG C is maintained for 20-25 min; and (3) the copper magnesium alloy casting is rapidly heated to 250-300 DEG C in half minute then, and machining is conducted atthe temperature range of 250-300 DEG C. According to the method, the copper magnesium alloy casting is rapidly cooled and rapidly heated, stress in the casting is completely released, and the castingcan be effectively prevented from being fractured in the machining process; and meanwhile, machining is conducted at 250-300 DEG C, due to the fact that the casting has a temperature, heat generatedlocally by machining can be negligible, and deformation damage to the casting is avoided.

Description

technical field [0001] The invention relates to the technical field of machining, in particular to a machining method for copper-magnesium alloy castings. Background technique [0002] Copper-magnesium alloy castings are a general term for alloys mainly composed of iron, carbon and silicon. In these alloys, the carbon content exceeds the amount that can be retained in austenitic solid solution at the eutectic temperature. [0003] In order to apply copper-magnesium alloy castings to mechanical parts, copper-magnesium alloy castings also need to be machined. The existing machining methods for copper-magnesium alloy castings have the following technical problems: [0004] 1. Carry out at room temperature. When processing copper-magnesium alloy castings, due to the generation of local heat during processing, the copper-magnesium alloy castings will be deformed to a certain extent; [0005] 2. The internal stress release of the casting is not complete, and the generated torsio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P25/00
CPCB23P25/00
Inventor 朱旭
Owner 朱旭
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