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Method for eliminating color differences of machined surface of electroslag martensite circle forging machine

A martensite and machining technology, which is applied in the field of eliminating the surface color difference of electroslag martensitic round forging machining, can solve the problems of affecting product image, affecting contract fulfillment on time, uneven surface hardness, etc.

Active Publication Date: 2021-08-17
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface of the electroslag 2Cr13 forged circle produced by Taiyuan Iron and Steel Co., Ltd. was machined and found to have protrusions, stains, and uneven surface hardness, which directly affected the timely fulfillment of the contract and greatly affected the product image.

Method used

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  • Method for eliminating color differences of machined surface of electroslag martensite circle forging machine
  • Method for eliminating color differences of machined surface of electroslag martensite circle forging machine
  • Method for eliminating color differences of machined surface of electroslag martensite circle forging machine

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This method is implemented in the profile factory diameter forging machine forging electroslag 2Cr13 forging circle. The raw material of the electrode blank is ￠550mm, the electroslag ingot shape is ￠710mm, the finished product specification is ￠330, and the forging circle is optimized and improved by two annealing processes after forging;

[0040] The two-time annealing process specifically includes:

[0041] 1) First annealing:

[0042] Annealing at 880-920°C for 4-5 hours, and air cooling to below 100°C after taking out the furnace, can transform the residual austenite in the forged 2Cr13 forged circle into martensite;

[0043] 2) Second annealing:

[0044] After the first annealing, the 2Cr13 forged circle is annealed at 750±10°C for 15 hours, and then air-cooled after the first annealing, the martensite obtained by the first annealing can be transformed into tempered martensite.

[0045] The surface and structure comparison of the forging machine before and after...

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Abstract

The invention discloses a method for eliminating color differences of a machined surface of an electroslag martensite circle forging machine. According to the method, the mechanism of electroslag steel forging circle color difference generation is researched according to the personalized requirements of a user for surface color differences, besides normal electroslag process control, the forging circle heat treatment process is optimized and improved with post-forging heat treatment process optimization as a thinking starting point, and two annealing processes are formulated. The problem of the color differences after machining of the electroslag martensite round forging surface is solved, and user requirements are met.

Description

technical field [0001] The invention belongs to the field of pressure processing and heat treatment, and in particular relates to a method for eliminating the color difference on the surface of electroslag martensitic round forging machining. Background technique [0002] Electroslag martensitic forged rounds include various electroslag forged rounds, such as electroslag 2Cr13 forged rounds, which are mainly used to make glass rolls for photovoltaic power generation. Due to the particularity of the industry, the forged rounds must have uniform surface hardness and uniform color after processing , there must not be any defects such as white bright protrusions and color spots, otherwise it will affect the quality of the final glass product and cannot be used. [0003] The process flow of electroslag 2Cr13 round forging produced by Taiyuan Iron and Steel Co., Ltd. is: die casting steel ingot → electroslag remelting → heating → forging → annealing → delivery to warehouse. The s...

Claims

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Application Information

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IPC IPC(8): C21D1/26C21D6/00C21D8/06C21D9/00
CPCC21D1/26C21D8/065C21D9/0075C21D6/002C21D2211/008Y02P10/20
Inventor 乔小梅许立伟贾鹏鹏郑壮
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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