Production method of 35CrMnSiA round steel applied to high-speed high-load shaft

A high-speed, high-load, production method technology, applied in the field of metallurgy, can solve the problems of small rolling total elongation coefficient, insufficient grain size refinement, small rough rolling reduction, etc., and achieve good surface quality, bright surface, size high precision effect

Pending Publication Date: 2022-03-04
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, at present, the production of 35CrMnSiA steel is difficult, the production quality level is not high, and the production process mainly has the following defects: (1) The total rolling elongation coefficient is small and the rough rolling reduction is small, resulting in insufficient grain size refinement; (2) The surface of the steel is not peeled, so that there are surface defects such as decarburization layer and pits on the surface of the steel, which makes it difficult to grasp the mechanical properties of its raw materials, resulting in a high failure rate of high-speed and high-load shafts
The mechanical properties of the produced 35CrMnSiA steel are poor. The yield strength of the existing φ160mm 35CrMnSiA round steel is 1282-1308MPa, the tensile strength is 1620-1654MPa, and the impact energy is 31-45J, which cannot fully meet the needs of high-speed and high-load shaft steel.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The production method of the 35CrMnSiA round steel applied to the high-speed high-load shaft comprises the following steps:

[0026] (1) Production of continuous casting slabs: select 100 tons of electric furnace → LF furnace refining + VD vacuum degassing treatment → continuous casting production process to produce 35CrMnSiA continuous casting slabs with a diameter of 650 mm, and the resulting continuous casting slabs include the following components in weight percentage: Carbon 0.35~0.39%; Silicon 1.25~1.32%; Manganese 0.90~0.95%; Phosphorus≤0.018%; Sulfur≤0.015%; Copper≤0.15%; Chromium 1.20~1.28%; 0.015~0.030%; the balance is iron and other unavoidable elements;

[0027] (2) Heating: Put the continuous casting slab produced in step (1) into the heating furnace for heating. The temperature in the preheating section is 700°C, the temperature in the heating section I is 1100°C, the temperature in the heating section II is 1220°C, and the soaking section The temperature...

Embodiment 2

[0038] The production method of the 35CrMnSiA round steel applied to the high-speed high-load shaft comprises the following steps:

[0039] (1) Production of continuous casting slabs: select 100 tons of electric furnace → LF furnace refining + VD vacuum degassing treatment → continuous casting production process to produce 35CrMnSiA continuous casting slabs with a diameter of 650 mm, and the resulting continuous casting slabs include the following components in weight percentage: Carbon 0.35~0.39%; Silicon 1.25~1.32%; Manganese 0.90~0.95%; Phosphorus≤0.018%; Sulfur≤0.015%; Copper≤0.15%; Chromium 1.20~1.28%; 0.015~0.030%; the balance is iron and other unavoidable elements;

[0040] (2) Heating: Put the continuous casting slab produced in step (1) into the heating furnace for heating. The temperature of the preheating section is 750°C, the temperature of the heating section I is 1120°C, the temperature of the heating section II is 1230°C, and the soaking section The temperature...

Embodiment 3

[0051] The production method of the 35CrMnSiA round steel applied to the high-speed high-load shaft comprises the following steps:

[0052] (1) Production of continuous casting slabs: select 100 tons of electric furnace → LF furnace refining + VD vacuum degassing treatment → continuous casting production process to produce 35CrMnSiA continuous casting slabs with a diameter of 650 mm, and the resulting continuous casting slabs include the following components in weight percentage: Carbon 0.35~0.39%; Silicon 1.25~1.32%; Manganese 0.90~0.95%; Phosphorus≤0.018%; Sulfur≤0.015%; Copper≤0.15%; Chromium 1.20~1.28%; 0.015~0.030%; the balance is iron and other unavoidable elements;

[0053] (2) Heating: Put the continuous casting slab produced in step (1) into the heating furnace for heating. The temperature in the preheating section is 800°C, the temperature in the heating section I is 1150°C, the temperature in the heating section II is 1240°C, and the soaking section The temperature...

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Abstract

The invention belongs to the technical field of metallurgy, and particularly relates to a production method of 35CrMnSiA round steel applied to a high-speed high-load shaft. The production method of the 35CrMnSiA round steel comprises the following steps: (1) producing a continuous casting billet; (2) heating; (3) descaling with high-pressure water; (4) rough rolling; (5) cutting heads; (6) finish rolling; (7) cooling by a cooling bed; (8) slow cooling in a slow cooling pit; (9) peeling; and (10) round steel inspection, packaging and warehousing. According to the production method, the procedures of heating, rolling, cooling and peeling are comprehensively designed, the high-quality 35CrMnSiA round steel with the phi 160 specification is produced, and the requirement for high-speed and high-load shaft steel is met. The produced round steel is good in mechanical strength and has good adaptability to severe environments.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a production method of 35CrMnSiA round steel applied to high-speed and high-load shafts. Background technique [0002] High-speed and high-load shafts are used in complex production conditions, and the main steel is 35CrMnSiA. Due to the high-speed and high-load shafts, they have been working under complex working conditions for a long time, and the working conditions are harsh. The performance requirements for the steel used to make high-speed and high-load shafts are very strict. It is required to have excellent comprehensive mechanical properties, high strength, and toughness after heat treatment. , better weldability and formability. It can be seen that the quality of 35CrMnSiA steel directly affects the life of the high-speed and high-load shaft produced, and it is of great significance to control and improve the quality of 35CrMnSiA. [0003] However, at pr...

Claims

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Application Information

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IPC IPC(8): B21B37/74B21B45/02B21B45/08B21B15/00
CPCB21B37/74B21B45/08B21B15/00B21B45/0203
Inventor石军强陈良李浩秋王允王宗斌尹崇丽
OwnerSHANDONG IRON & STEEL CO LTD