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Free-cutting high-hardness austenite nonmagnetic die steel and manufacturing method thereof

A technology of non-magnetic mold and manufacturing method, which is applied in the field of easy-cutting high-hardness austenitic non-magnetic mold steel and its manufacturing field, can solve problems such as difficulties, and achieve the effects of convenient processing, excellent easy-cutting performance, and good comprehensive mechanical properties

Active Publication Date: 2013-10-23
SHANGHAI RES INST OF MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to improve the above properties under all cutting conditions at the same time, because they always affect each other sometimes

Method used

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  • Free-cutting high-hardness austenite nonmagnetic die steel and manufacturing method thereof
  • Free-cutting high-hardness austenite nonmagnetic die steel and manufacturing method thereof
  • Free-cutting high-hardness austenite nonmagnetic die steel and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A free-cutting high-hardness austenitic non-magnetic die steel, represented by YW1, the chemical elements of the die steel by weight percentage are: C0.54%, Si0.43%, Mn15.79%, Cr5.05%, V1 .60%, easy cutting elements 0.37%, the balance is Fe. Among them, the easy cutting elements are Se0.02%, Sn0.20%, Cu0.15%.

[0033] The manufacturing method of the above-mentioned high-hardness austenitic non-magnetic free-cutting die steel is as follows: all kinds of charge materials such as pure iron, ferromanganese, ferrochromium, ferrovanadium and free-cutting elements containing the above-mentioned components are smelted through a non-vacuum induction furnace, and the smelting The temperature is 1450°C, then electroslag remelting, then forging at 1150°C, then solid solution at 1100-1150°C for 1-2 hours, water cooling to room temperature; then aging at 700-750°C for 4-6 hours to obtain high hardness Austenitic non-magnetic free-cutting die steel is processed into required parts, w...

Embodiment 2

[0035] A free-cutting high-hardness austenitic non-magnetic die steel, represented by YW2, the chemical elements of the die steel by weight percentage are: C0.47%, Si0.48%, Mn13.57%, Cr5.05%, V1 .77%, easy cutting elements 0.48%, and the balance is Fe. Among them, the easy cutting elements are Se0.03%, Sn0.25%, Cu0.20%.

[0036] The manufacturing method of the above-mentioned free-cutting high-hardness austenitic non-magnetic die steel is as follows: all kinds of furnace materials including pure iron, ferromanganese, ferrochrome, ferrovanadium and one or more free-cutting elements are subjected to non-vacuum induction Furnace melting at 1400°C, electroslag remelting, forging at 1130°C, solid solution at 1100-1150°C for 1-2 hours, water cooling to room temperature; aging at 700-750°C for 4- 6h, the free-cutting high-hardness austenitic non-magnetic die steel was obtained, and processed into the required parts, which met the product design and use requirements.

[0037] The fr...

Embodiment 4

[0066] A free-cutting high-hardness austenitic non-magnetic die steel, the die steel is composed of the following chemical elements in percentage by weight: C0.45%, Si0.30%, Mn16.00%, Cr6.00%, V2. 50%, easy cutting elements 0.30%, and the balance is Fe. Among them, the easy cutting elements are Se0.05% and Sn0.25%.

[0067] Free-cutting high-hardness austenitic non-magnetic die steel has the following mechanical properties: use hardness ≥ HRC40, tool wear during machining is less than 30% of similar steel without easy-cutting elements, and relative magnetic permeability ≤ 1.050.

[0068] A method for manufacturing free-cutting high-hardness austenitic non-magnetic die steel, the method comprising the following steps:

[0069] (1) According to the ratio of mold steel, the charge is smelted in a non-vacuum induction furnace according to the process requirements. The melting temperature is 1450°C. Metal;

[0070] (2) After the treatment in step (1), carry out electroslag remel...

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Abstract

The invention relates to free-cutting high-hardness austenite nonmagnetic die steel and a manufacturing method thereof. The free-cutting high-hardness austenite nonmagnetic die steel comprises, by weight, 0.45-0.60% of C, 0.30-0.60% of Si, 12.50-16.00% of Mn, 4.00-6.00% of Cr, 1.50-2.50% of V, 0.30-0.55% of free-cutting elements, and the balance Fe. The free-cutting elements comprise Se, Sn and Cu. The manufacturing method comprises the following steps of melting furnace burden in a non-vacuum induction furnace, carrying out remelting refining of electroslag, carrying out hot processing molding, and carrying out heat treatment on the molded steel to obtain the free-cutting high-hardness austenite nonmagnetic die steel. Compared with the prior art, the free-cutting high-hardness austenite nonmagnetic die steel does not produce phase change and always keeps austenite micro-structure in heating and cooling. After solid solution and ageing heat treatment reinforcement, the free-cutting high-hardness austenite nonmagnetic die steel has good integrated mechanical properties, good hot and cold processing performances and excellent free-cutting performances, is convenient for processing, and reduces a processing period. The free-cutting high-hardness austenite nonmagnetic die steel is widely used for dies in electronic product, automobile instrument and motor magnet ring industries.

Description

technical field [0001] The invention relates to a metal material and a manufacturing method thereof, in particular to a free-cutting high-hardness austenitic non-magnetic die steel and a manufacturing method thereof. Background technique [0002] Free-cutting steel is to add one or several elements to steel, and use itself or other elements to form inclusions that are beneficial to cutting processing to improve the machinability of steel. Free-cutting steel has better machinability and better surface finish, which can reduce the manufacturing cost of the product. For example, the cutting efficiency of processing Y40Mn free-cutting steel is 50% higher than that of 45# steel parts, and the tool life is extended by 4 times; 20 free-cutting steel not only has better cutting performance than 20# steel, but the surface finish of processed products is higher. [0003] With the development of machinery manufacturing industry and automobile industry, the use of free-cutting steel co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/38C22C38/60C22C33/04
Inventor 高余顺薛春黄春波王文正张湛
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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