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Alloy ball iron guide disc for precision tube grimper

A technology of alloy balls and pipe rolling mills, applied in furnaces, heat treatment equipment, heat treatment baths, etc., can solve problems such as poor wear resistance, low strength, and impact on production, so as to improve the performance of "sticking steel" and improve production Improvement of efficiency and wear resistance

Active Publication Date: 2007-09-26
SHANDONG SIFANG STEEL PIPE EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the phenomenon of hardness, low strength and "sticking steel" existing in the guide plate of the precision pipe rolling mill in the use process, and propose a new type of alloy ductile iron guide plate for the precision pipe rolling mill. The different combinations of its components and heat treatment strengthen the comprehensive performance of the material, and are used to replace the current chrome-molybdenum-copper infinite chilled ductile iron guide plate to solve its poor wear resistance, easy to produce "sticking steel" phenomenon, and Seriously affect the production of thin-walled seamless steel pipes and alloy seamless steel pipes and other shortcomings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Manufacture a set of alloy ductile iron guide plate for φ219 precision pipe rolling mill, 2 pieces in total. The selected alloy ductile iron composition (weight %) is as follows:

[0016] C

Si

mn

P

S

Cr

Ni

Mo

Mg

3.55

2.1

0.6

0.03

0.03

0.3

3.4

1.0

0.04

[0017] The rest is Fe and other unavoidable impurities.

[0018] The overall spheroidization rate of the casting in this embodiment is required to be above grade three, the use state is a heat treatment state, and its metallographic structure is acicular lower bainite. Its performance index reaches σb=1300Mpa, αk=55J / cm 2 , HRC=50.

[0019] During the implementation process, the ratio of raw materials is selected according to the composition requirements, conventional smelting is carried out in an intermediate frequency induction furnace, and inoculants and nodulizers are added, and conventional sand castin...

Embodiment 2

[0024] The rest is Fe and other unavoidable impurities.

[0025] The overall spheroidization rate of the casting in this embodiment is required to be above three grades, the use state is heat treatment state, and its metallographic structure is acicular lower bainite; its performance index reaches σb=1250Mpa, αk=50J / cm 2 , HRC=45.

[0026] During the implementation process, the ratio of raw materials is selected according to the composition requirements, conventional smelting is carried out in an intermediate frequency induction furnace, and inoculants and nodulizers are added, and conventional sand casting is carried out to obtain the required rough. The nodularization rate of the rough reaches two above grade. Then carry out conventional rough machining, and then carry out conventional salt bath isothermal heat treatment on the blank to obtain the following metallographic structure dominated by bainite. Then carry out conventional turning, grinding and other process...

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PUM

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Abstract

The invention discloses a new-typed alloy ball-iron guide disc of fine rolling machine, which comprises the following parts: 3.0-3.6% C, 1.5-2.2% Si, 0.4-0.8% Mn, not more than 0.04% P, not more than 0.04% S, 0.1-0.3%Cr, 2.0-3.5% Ni, 0.5-1.0% Mo, not less than 0.04% Mg and Fe and inevitable impurity. The material tissue uniforms interior and exterior to improve abrasion resistance and flexibility, which improves manufacturing efficiency obviously.

Description

technical field [0001] The invention relates to a guide plate for a pipe rolling mill, in particular to an alloy ductile iron guide plate for rolling a thin-walled seamless steel pipe and an alloy steel pipe by a precision pipe rolling mill. Background technique [0002] The guide plate of the pipe rolling mill is a necessary tool and die in the production process of rolling seamless steel pipes in precision pipe mills. It works with the rolls at the same time to complete the deformation of seamless steel pipes in this process. In a high-temperature environment (about 1100°C), it bears rolling and sliding friction under the action of compressive stress, and at the same time bears the cooling and heating action of cooling water. The working environment is harsh and the consumption is large. The material of the precision pipe rolling mill guide plate currently used is chromium molybdenum copper infinite chilled ductile iron, and its main components are: carbon C; silicon Si; m...

Claims

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Application Information

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IPC IPC(8): C22C38/44C21D9/00C21D1/46
Inventor 袁厚之张凝刘行一王平
Owner SHANDONG SIFANG STEEL PIPE EQUIP MFG
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