Manufacturing method of high-wear-resistance compression roller shell made of ledeburite steel

A ledeburite steel, high wear resistance technology, used in manufacturing tools, furnace types, furnaces, etc., can solve the problems of inability to collect and clean debris inside the lathe, short service life, and no wear resistance. Safe and convenient to use, improve wear resistance and prolong service life

Active Publication Date: 2020-06-30
LIYANG JINKUN FORGING & MACHINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the currently produced roller shell blanks on the market are forged steel parts, and the materials used are low-carbon low-alloy carburizing steel with 0.15% to 0.25% carbon, or alloy bearing steel with 0.9% to 1.1% carbon, or carbon-containing 0.5%~0.7% alloy spring steel, the final heat treatment process of carburizing steel used is c...

Method used

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  • Manufacturing method of high-wear-resistance compression roller shell made of ledeburite steel
  • Manufacturing method of high-wear-resistance compression roller shell made of ledeburite steel
  • Manufacturing method of high-wear-resistance compression roller shell made of ledeburite steel

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Embodiment 1

[0028] A method for manufacturing a ledeburite steel high wear resistance pressure roller shell, comprising step 1, blanking; step 2, forging; step 3, annealing; step 4, machining; step 5, quenching and low temperature tempering; step 6 , grinding the inner hole;

[0029] Manufacture 11133-V / C type pressure roller shell, the material grade of ledeburitic steel used is Cr12MoV, the chemical composition is carbon (C) = 1.45-1.70%, silicon (Si) ≤ 0.40%, manganese (Mn) ≤ 0.40%, Phosphorus (P) ≤ 0.025%, sulfur (S) ≤ 0.025%, chromium (Cr) = 11.00-12.50%, molybdenum (Mo) = 0.40-0.60%, vanadium (V) = 0.15-0.30%, the rest is iron and impurity elements;

[0030] In step 1, use ledeburite steel to integrally forge the blank of the pressure roller shell with a sawing machine, with a weight of 190kg and dimensions of X=340mm, Y=340mm, Z=220mm;

[0031] In step 2, the raw material is heated in a natural gas furnace, using segmental heating, the temperature of the furnace is 500-700°C, p...

Embodiment 2

[0042] A method for manufacturing a ledeburite steel high wear resistance pressure roller shell, comprising step 1, blanking; step 2, forging; step 3, annealing; step 4, machining; step 5, quenching and low temperature tempering; step 6 , grinding the inner hole;

[0043] To manufacture the X9230-4a-V / D type pressure roller shell, the ledeburite steel material used is Cr12, and the chemical composition is carbon (C) = 2.00-2.30%, silicon (Si) ≤ 0.40%, manganese (Mn) ≤ 0.40 %, phosphorus (P) ≤ 0.025%, sulfur (S) ≤ 0.025%, chromium (Cr) = 11.50-13.00%, the rest are iron and impurity elements;

[0044] In step 1, use ledeburite steel to integrally forge the blank of the pressure roller shell with a sawing machine, the weight is 205kg, and the dimensions are X=340mm, Y=340mm, Z=230mm;

[0045] In step 2, the raw material is heated in a natural gas furnace, using segmental heating, the temperature of the furnace is 500-700°C, preheating for more than 3.5 hours, heating to 850°C ...

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Abstract

The invention discloses a manufacturing method of a high-wear-resistance compression roller shell made of ledeburite steel. The manufacturing method comprises the following steps of 1, feeding; 2, forging; 3, annealing; 4, machining; 5, quenching and low-temperature tempering; and 6, grinding an inner hole; in the first step, a compression roller shell blank is integrally forged by using the ledeburite steel, and feeding is carried out by using a sawing machine according to the weight required by the process; in the second step, raw materials are heated in a natural gas furnace, sectional heating is adopted, two forging equipment are used for forging, drawing-out and upsetting in three directions are adopted, and the total forging ratio is larger than 8. The method comprises the steps thatthe compression roller shell blank is integrally forged by using the ledeburite steel, quenching and low-temperature tempering heat treatment are carried out after machining; the metallographic structure of a final finished product is tempered martensite, carbide and retained austenite, the carbide comprises eutectic carbide and eutectoid carbide, the wear resistance of a compression roller shellis improved by utilizing the high wear resistance of the eutectic carbide, and the service life of the compression roller shell is prolonged.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a method for manufacturing a ledeburite steel high wear resistance pressure roller shell. Background technique [0002] The pressure roller shell is a vulnerable part of the granulator. The structure of the pressure roller shell is a ring, with an end face, an outer circle, and an inner hole. The outer circle is processed with a feeding structure, and the feeding structure has two forms of groove or blind hole. The inner hole has a ring groove for assembly. The function of the pressure roller shell in the granulator is to roll on the inner wall of the ring die relative to each other, extruding feed, wood chips, or straw, etc. from the hole of the ring die to form granules. The pressure roller shell The main failure mode of the pellet mill is the wear and tear caused by rolling with feed or wood chips, or straw and other raw materials that need to be pelletized. [0003] However, t...

Claims

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Application Information

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IPC IPC(8): B23P15/00C21D1/18C21D9/38C21D1/26C21D6/00
CPCB23P15/00C21D1/18C21D1/26C21D6/002C21D9/38
Inventor 闫来平徐文博曹国芳
Owner LIYANG JINKUN FORGING & MACHINING
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