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A kind of preparation method of high-life nodular cast iron hammer head

A technology of ductile iron and hammerheads, which is applied in the field of preparation of high-life ductile iron hammerheads, can solve the problems of low cost performance, non-wear-resistant high manganese steel hammerheads, and high price of bimetallic hammerheads

Active Publication Date: 2018-01-12
NINGGUO HUAFENG WEAR RESISTANT MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hammers made of various materials have certain limitations, specifically: high manganese steel hammers are not wear-resistant, high chromium cast iron hammers are fragile, bimetallic hammers are expensive and cost-effective

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of preparation method of high-life nodular cast iron hammerhead proposed by the present invention comprises the following steps:

[0028] S1. Smelting: Put the raw material in a smelting furnace to heat up to a molten state, temper it, and get out of the furnace to obtain an alloy liquid; wherein the components of the alloy liquid include: carbon: 3.72%, silicon: 2.76%, manganese: 0.35%, Chromium: 0.52%, molybdenum: 0.26%, copper: 0.45%, nickel: 0.33%, phosphorus: ≤0.05%, sulfur: ≤0.03%, and the rest is iron;

[0029] S2. Pouring: the alloy liquid is poured to obtain the hammer body, and the pouring temperature is 1350°C;

[0030] S3. Heat treatment: raise the temperature of the hammer body to austenitize it, then keep it warm for 2.5 hours, and then austenitize it to obtain a high-life nodular cast iron hammer head. The austenitization temperature is T 1 =925+K 1 ×100×(n 锰 +n 铜 ) / 12.3, austempering temperature T 2 =235+K 2 ×100×(n 锰 +n 铜 ) / 12.3; K 1 The...

Embodiment 2

[0032] A kind of preparation method of high-life nodular cast iron hammerhead proposed by the present invention comprises the following steps:

[0033] S1. Smelting: Put the raw material in a smelting furnace to heat up to a molten state, temper it, and get out of the furnace to obtain an alloy liquid; wherein the components of the alloy liquid include: carbon: 3.78%, silicon: 2.73%, manganese: 0.38%, Chromium: 0.48%, molybdenum: 0.30%, copper: 0.42%, nickel: 0.36%, phosphorus: ≤0.05%, sulfur: ≤0.03%, and the rest is iron;

[0034] S2. Pouring: the alloy liquid is poured to obtain the hammer body, and the pouring temperature is 1380°C;

[0035] S3. Heat treatment: raise the temperature of the hammer body to austenitize it, then keep it warm for 1.5h, and then austenitize it to obtain a high-life nodular cast iron hammer head. The austenitization temperature is T 1 =925+K 1 ×100×(n 锰 +n 铜 ) / 12.3, austempering temperature T 2 =235+K 2 ×100×(n锰 +n 铜 ) / 12.3; K 1 The value ...

Embodiment 3

[0037] A kind of preparation method of high-life nodular cast iron hammerhead proposed by the present invention comprises the following steps:

[0038] S1. Smelting: Put the raw material in a smelting furnace to heat up to a molten state, temper it, and obtain the alloy liquid; the components of the alloy liquid include by weight percentage: carbon: 3.74%, silicon: 2.75%, manganese: 0.36%, Chromium: 0.51%, molybdenum: 0.27%, copper: 0.44%, nickel: 0.34%, phosphorus: ≤0.05%, sulfur: ≤0.03%, and the rest is iron;

[0039] S2. Pouring: the alloy liquid is poured to obtain the hammer body, and the pouring temperature is 1360°C;

[0040] S3. Heat treatment: raise the temperature of the hammer body to austenitize it, then keep it warm for 2 hours, and then austenitize it to obtain a high-life nodular cast iron hammer head. The austenitization temperature is T 1 =925+K 1 ×100×(n 锰 +n 铜 ) / 12.3, austempering temperature T 2 =235+K 2 ×100×(n 锰 +n 铜 ) / 12.3; K 1 The value of is 1...

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Abstract

The invention discloses a preparing method for a long-life nodular-cast-iron hammerhead. The preparing method includes the steps that raw materials are heated to the melting state, hardening and tempering are carried out, discharging is carried out, and alloy liquid is obtained, wherein the alloy liquid is prepared from, by weight, 3.72%-3.78% of carbon, 2.73%-2.76% of silicon, 0.35%-0.38% of manganese, 0.48%-0.52% of chromium, 0.26%-0.30% of molybdenum, 0.42%-0.45% of copper, 0.33%-0.36% of nickel and the balance iron; the alloy liquid is poured to obtain a hammerhead blank body; and the hammerhead blank body is heated and austenitized, heat preservation is carried out, and the long-life nodular-cast-iron hammerhead is obtained in an isothermal quenching manner, wherein the austenitizing temperature T1 is calculated through the equation T1=925+K1*100*(n<manganese>+n <copper>) / 12.3, the isothermal quenching temperature T2 is calculated through the equation T2=235+K2*100*(n<manganese>+n<copper>) / 12.3, the value of K1 ranges from 80 to 120, and the value of K2 ranges from 100 to 150.

Description

technical field [0001] The invention relates to the technical field of hammer crushers, in particular to a method for preparing a high-life nodular cast iron hammer head. Background technique [0002] Hammer crushers are widely used in brick factories and coal gangue processing plants. The hammer head is the main wear part to withstand the impact and wear of materials during high-speed rotation. The hammer heads commonly used in brick factories now include high manganese steel hammer heads, high chromium cast iron hammer heads and bimetal composite hammer heads. However, hammers made of various materials have certain limitations, specifically: high manganese steel hammers are not wear-resistant, high chromium cast iron hammers are fragile, and bimetallic hammers are expensive and cost-effective. [0003] Therefore, a kind of not broken but also wear-resistant tup that is suitable for using in brick factory and coal gangue processing plant now is the problem urgently in need...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C22C33/08C21D1/20C21D5/00B02C13/26
CPCB02C13/26C21D1/20C21D5/00C22C33/08C22C37/10
Inventor 陈全心
Owner NINGGUO HUAFENG WEAR RESISTANT MATERIAL