CN1948541A - Corrosion resistant mould steel - Google Patents

Abstract

The invention belongs to steels, which is a kind of corrosion resistant die steel. It contains C, Mn, Si, S, P, Cr, Mo, V, Ni, N and Fe allowance. The die steel has much strongpoint including high corrosion resistance, overpressure resistance and wear resistance, easy polishing, good effect of gripping figure etc. It especially applicable for producing large or medium sized plastic dies with corrosion resistance and high-level mirror request, for example, PVC mould, glass mould and optical mirror mould etc. It also be used extensively in machine manufacture.

Description

A kind of corrosion resistant mould steel

Technical field

The invention belongs to steel, more precisely is a kind of corrosion resistant mould steel.

Background technology

At present, the die steel of domestic each manufacturer production, the erosion resistance of steel is relatively poor, and the mould life cycle of producing is short, and integrated performance index is lower.

Summary of the invention

Given this, the objective of the invention is to, a kind of die steel with high corrosion resistance is provided.

Purpose of the present invention is achieved through the following technical solutions: a kind of die steel of erosion resistance, form by following components in weight percentage:

C 0.30-0.45

Mn 0.5-1.00

Si 0.2-0.80

S ≤0.03

P ≤0.03

Cr 16.00-18.00

Mo 1.00-1.50

V 0.10-0.40

Ni 0.30-1.00

N 0.02-0.12

The Fe surplus

Manufacturing process: get the said components material, adopt electric furnace+vacuum outgas+electric slag refusion and smelting technology.

1, at first iron is melted in electric furnace, at 1540 ℃ of beginning slag making dephosphorizations, adopt the big quantity of slag, the stream slag operation;

2, after the slag making dephosphorization finished, the alkaline reduction slag was made in the reduction of skimming;

3, the desulfuration operation, sulphur content and composition reach requirement, and temperature reaches 1630 ℃, begins tapping;

4, molten steel enters refining furnace, carries out the slag making heating, and vacuumizes the blowing argon gas operation;

5, after vacuum metling finished, molten steel casting became electrode bar, for esr is prepared;

6, electrode bar is ready, carries out esr;

7, ESR ingot is carried out anneal;

8, carry out the steel ingot processing that homogenizes, under 1180-1230 ℃ of temperature, kept 10-30 hour;

9, conducting forging processing is carried out modified anneal afterwards, gets finished product.

Die steel of the present invention has higher corrosion resistance nature, and is withstand voltage wear-resisting, easily polishing, texture is effective, be particularly suitable for making the large and medium-sized mould of plastics of erosion resistance height and minute surface demand,, can be widely used in machine industry as PVC mould, glass molds, optical frames face mould etc.

Embodiment

A kind of die steel, get:

C 0.36mg

Mn 0.70mg

Si 0.40mg

S 0.02mg

P 0.015mg

Cr 17.00mg

Mo 1.20mg

V 0.26mg

Ni 0.80mg

N 0.05mg

The Fe surplus

Manufacturing process: get the said components material, adopt electric furnace+vacuum outgas+electric slag refusion and smelting technology.

1, earlier iron is melted in electric furnace, at 1540 ℃ of beginning slag making dephosphorizations, adopt the big quantity of slag, the stream slag operation;

2, after the slag making dephosphorization finished, the alkaline reduction slag was made in the reduction of skimming;

3, the desulfuration operation, sulphur content and composition reach requirement, and temperature reaches 1630 ℃, begins tapping;

4, molten steel enters refining furnace, carries out the slag making heating, and vacuumizes the blowing argon gas operation;

5, after vacuum metling finished, molten steel casting became electrode bar, for esr is prepared;

6, electrode bar is ready, carries out esr;

7, ESR ingot is carried out anneal;

8, carry out the steel ingot processing that homogenizes, under 1218 ℃ of temperature, kept 15 o'clock;

9, conducting forging processing is carried out modified anneal afterwards, gets finished product.

Claims (1)

1, a kind of corrosion resistant mould steel is characterized in that: this die steel is made up of following components in weight percentage:

C 0.30-0.45

Mn 0.5-1.00

Si 0.2-0.80

S ≤0.03

P ≤0.03

Cr 16.00-18.00

Mo 1.00-1.50

V 0.10-0.40

Ni 0.30-1.00

N 0.02-0.12

The Fe surplus

Manufacturing process: get the said components material, adopt electric furnace+vacuum outgas+electric slag refusion and smelting technology.

1, at first iron is melted in electric furnace, at 1540 ℃ of beginning slag making dephosphorizations, adopt the big quantity of slag, the stream slag operation;

2, after the slag making dephosphorization finished, the alkaline reduction slag was made in the reduction of skimming;

3, the desulfuration operation, sulphur content and composition reach requirement, and temperature reaches 1630 ℃, begins tapping;

4, molten steel enters refining furnace, carries out the slag making heating, and vacuumizes the blowing argon gas operation;

5, after vacuum metling finished, molten steel casting became electrode bar, for esr is prepared;

6, electrode bar is ready, carries out esr;

7, ESR ingot is carried out anneal;

8, carry out the steel ingot processing that homogenizes, under 1180-1230 ℃ of temperature, kept 10-30 hour;

9, conducting forging processing is carried out modified anneal afterwards, gets finished product.