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A method to reduce the residual stress of processing materials for stainless steel distribution cabinets

A technology for processing materials and residual stress, applied in the direction of improving process efficiency, can solve problems such as affecting the dimensional stability of components, reducing mechanical properties of power distribution cabinets, affecting fatigue life, etc. The effect of improving toughness and overall performance

Active Publication Date: 2021-12-21
中泽电气科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when stainless steel is processed to prepare power distribution cabinets, it will cause different degrees of residual stress, which will further affect the dimensional stability of components, cause problems such as deformation and cracks, reduce the mechanical properties of power distribution cabinets and affect their fatigue life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A method for reducing the residual stress of processed materials for stainless steel power distribution cabinets, comprising: melting the processed stainless steel materials in a vacuum induction furnace, pouring them into ingots, performing alloy forging, heating at 1190°C, and holding for 100 minutes to obtain a green body, which will be prepared The obtained titanium-based composite powder is evenly coated on the surface of the green body, and then hot-rolled. Inject nitrogen, the flow rate of nitrogen gas is 60 cubic meters per hour, and the surface of the hot-rolled steel plate is quickly cleaned with concentrated hydrochloric acid with a concentration of 8.2 mol / liter at 20°C for 40 seconds, and then rinsed twice with clean water. Finally, put the steel plate in a preheated vacuum furnace at 600°C, raise the temperature to 1030°C at a rate of 7°C / min, keep it warm for 22 minutes, carry out stress relief, and carry out cold rolling after coming out of the furnace. ...

Embodiment 2

[0021] A method for reducing the residual stress of processed materials for stainless steel power distribution cabinets, comprising: melting the processed stainless steel materials in a vacuum induction furnace, pouring them into ingots, performing alloy forging, heating at 1200°C, and holding the heat for 110 minutes to obtain a green body, which will be prepared The obtained titanium-based composite powder is evenly coated on the surface of the green body, and then hot-rolled. Inject nitrogen, the flow rate of nitrogen gas is 62 cubic meters per hour, and the surface of the hot-rolled steel plate is quickly cleaned with concentrated hydrochloric acid with a concentration of 8.4 mol / liter at 22 °C for 42 seconds, and then rinsed twice with clean water. Finally, place the steel plate in a preheated vacuum furnace at 630°C, raise the temperature to 1040°C at a rate of 7.5°C / min, keep it warm for 24 minutes, and perform stress relief. The plate with the required thickness is obt...

Embodiment 3

[0028] A method for reducing the residual stress of processed materials for stainless steel power distribution cabinets, comprising: melting the processed stainless steel materials in a vacuum induction furnace, pouring them into ingots, performing alloy forging, heating at 1220°C, and holding for 120 minutes to obtain a green body, which will be prepared The obtained titanium-based composite powder is evenly coated on the surface of the green body, and then hot-rolled. Inject nitrogen, the flow rate of nitrogen is 65 cubic meters per hour, and the surface of the hot-rolled steel plate is quickly cleaned with concentrated hydrochloric acid with a concentration of 8.6 mol / liter at 25 °C for 45 seconds, and then rinsed with water for 3 times. Finally, place the steel plate in a preheated vacuum furnace at 660°C, raise the temperature to 1050°C at a rate of 8°C / min, keep it warm for 26 minutes, and perform stress relief. The plate with the required thickness is obtained, placed i...

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Abstract

The invention relates to the technical field of new material processing, and discloses a method for reducing the residual stress of processing materials for stainless steel power distribution cabinets. By adjusting the content of niobium element to the range of 0.8-1.2%, it is beneficial to the bonding between molten metal crystal interfaces at high temperatures , to reduce the plastic deformation ability of stainless steel ingots, the prepared titanium-based composite powder is uniformly coated on the surface of the green body, and then hot-rolled, which reduces the sensitivity of nickel, silicon, copper and other elements to stress. When the steel plate material obtained by rolling and heat treatment is further used in the processing of power distribution cabinets, the welding performance is good, the welded joints are not easy to produce stress corrosion and thermal cracks, and have low residual stress, high mechanical strength, cracks and intergranular corrosion tendencies. It is solved, the strength and toughness of stainless steel are significantly improved, the obtained stainless steel plate has lower residual stress, the hardness, tensile strength and elongation of stainless steel are obviously improved, and the corrosion resistance is strong.

Description

technical field [0001] The invention belongs to the technical field of new material processing, and in particular relates to a method for reducing the residual stress of processing materials of stainless steel distribution cabinets. Background technique [0002] The power distribution cabinet is an important device in the power system and the final equipment of the power distribution system. The power distribution cabinet is the general name of the motor control center. In the case of concentrated loads and many circuits, they distribute the electric energy of a certain circuit of the upper-level power distribution equipment to the nearby loads. This level of equipment should provide protection, monitoring and control for the load. The power distribution cabinet is particularly important for the power system, so The safety of the power distribution cabinet is the focus of power distribution equipment. [0003] The existing plastic power distribution cabinets are of poor qua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C22C38/02C22C38/42C22C38/48C21D8/02C21D1/773C21D1/30B21C37/02
CPCC22C38/58C22C38/02C22C38/42C22C38/48C22C38/008C22C38/002C22C38/001C21D8/0226C21D8/0205C21D8/0278C21D8/0236C21D8/0247C21D1/773C21D1/30B21C37/02Y02P10/20
Inventor 张祖生梁晶晶
Owner 中泽电气科技有限公司
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