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Process for improving heating production efficiency of high-carbon chromium bearing steel

A high-carbon chromium bearing steel and production efficiency technology, applied in heat treatment furnaces, manufacturing tools, heat treatment equipment, etc., can solve problems such as waste of resources, dissatisfaction of material distribution in the second heating section and soaking section, loss of efficiency, etc., to increase tapping The effect of improving the number of counts and heating production efficiency

Pending Publication Date: 2022-03-11
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) When a batch of high-carbon chromium bearing steel continuous casting slabs has more than 54 incoming materials, and the excess part is small, the second heating stage and the soaking stage will be dissatisfied. At this time, the static heating and heat preservation arrangement is still used. Will result in loss of efficiency and waste of resources;

Method used

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  • Process for improving heating production efficiency of high-carbon chromium bearing steel
  • Process for improving heating production efficiency of high-carbon chromium bearing steel
  • Process for improving heating production efficiency of high-carbon chromium bearing steel

Examples

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Embodiment 1

[0033] This embodiment provides a process for improving the production efficiency of high-carbon chromium bearing steel heating. A high-carbon chromium bearing steel continuous casting slab of 320 (thickness)×480 (width)×5400mm (length) is selected, and its chemical composition and quality are 100%. The content is: C: 0.98%, Si: 0.23%, Mn: 0.33%, Cr: 1.45%, Mo: 0.003%, P: 0.008%, S: 0.001%, Al: 0.012%, and the balance is iron.

[0034] Include the following steps:

[0035] The steel billet is transferred to the rolling mill by an insulated car, and the surface temperature of the steel billet on the side entering the furnace is detected as 612-647 °C;

[0036] When loading steel, all six burners in the preheating section are turned on, and the furnace temperature in the non-heating section is actually controlled at 750-850°C, with a target temperature of 800°C;

[0037] After entering the furnace, the distance between billets should be 100mm, the temperature in the preheating ...

Embodiment 2

[0042] This embodiment provides a process for improving the heating production efficiency of high carbon chromium bearing steel. The continuous casting billet of high carbon chromium bearing steel of 320 (thickness) × 480 (width) × 5400 mm (length) is selected, and its chemical composition and quality are 100%. The contents are: C: 0.98%, Si: 0.23%, Mn: 0.33%, Cr: 1.45%, Mo: 0.003%, P: 0.008%, S: 0.001%, Al: 0.012%, and the balance is iron.

[0043] Include the following steps:

[0044] The billet is transported to the rolling mill by the heat preservation truck, and the surface temperature of the billet on the furnace side is detected as 605-651℃;

[0045] When loading steel, all 6 burners in the preheating section are turned on, the furnace temperature in the non-heating section is actually controlled at 750-850 °C, and the target temperature is 810 °C;

[0046] After entering the furnace, the billet spacing shall be 100mm, the temperature of the preheating section shall be...

Embodiment 3

[0051] This embodiment provides a process for improving the heating production efficiency of high carbon chromium bearing steel. The continuous casting billet of high carbon chromium bearing steel of 320 (thickness) × 480 (width) × 5400 mm (length) is selected, and its chemical composition and quality are 100%. The contents are: C: 0.98%, Si: 0.23%, Mn: 0.33%, Cr: 1.45%, Mo: 0.003%, P: 0.008%, S: 0.001%, Al: 0.012%, and the balance is iron.

[0052] Include the following steps:

[0053] The billet is transported to the rolling mill by the heat preservation truck, and the surface temperature of the billet on the furnace side is detected as 602-646℃;

[0054] When loading steel, all 6 burners in the preheating section are turned on, and the furnace temperature in the non-heating section is actually controlled at 750-850 °C, and the target temperature is 830 °C;

[0055] After entering the furnace, the billet spacing shall be 100mm, the temperature of the preheating section shal...

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Abstract

The invention discloses a process for improving the heating production efficiency of high-carbon chromium bearing steel, and relates to the technical field of steel production, the process comprises the following steps: S1, charging: adopting a hot delivery and hot charging process for 320 * 480 rectangular billets, and increasing the temperature of hot delivery billets; s2, preheating of a non-heat-supply section: adjusting through a burner of an adjacent preheating section, and controlling the temperature to be 750-850 DEG C; s3, material distribution, wherein the distance between steel billets in the furnace is adjusted; and S4, heat supply section: carrying out heat balance calculation on the high-carbon-chromium bearing billet again, adjusting the heat supply energy load of each section, and rolling the high-carbon-chromium bearing billet into round steel with the specification of phi 50-100mm after discharging. On the premise of meeting relevant product standards and technical protocol requirements, the heating production efficiency of the high-carbon-chromium bearing steel with the requirement for the high-temperature diffusion time is improved.

Description

technical field [0001] The invention relates to the technical field of steel production, in particular to a process for improving the heating production efficiency of high-carbon chromium bearing steel. Background technique [0002] High-carbon chromium bearing steel is widely used in almost all equipment manufacturing industries such as aerospace, wind power, high-speed rail, automobiles, and home appliances. In the above-mentioned manufacturing and usage scenarios, steel materials need to be heat treated. In addition to strict requirements on the purity of the steel, there are also high requirements on the uniformity of composition and structure. [0003] The content of C (0.95%-1.05%) and Cr (1.40%-1.65%) in high-carbon chromium bearing steel is very high, which belongs to elements with small equilibrium distribution coefficient (easy to segregate), and the solidification process has a long two-phase zone, and the segregation is very It is difficult to control, and in th...

Claims

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Application Information

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IPC IPC(8): C21D6/00C21D9/70C22C38/18C22C38/04C22C38/02
CPCC21D6/008C21D6/005C21D6/002C21D9/70C22C38/18C22C38/04C22C38/02
Inventor 陶涛张世平韩冰赵海洋邱军华周云
Owner NANJING IRON & STEEL CO LTD
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