Method for processing spindly shaft by utilizing 17-4PH stainless steel

A stainless steel, slender shaft technology, which is applied in the field of stainless steel processing slender shafts, can solve the problems of acceleration, impossibility, poor deformation ability, etc.

Active Publication Date: 2012-08-29
ZHEJIANG ZHENXING PETROCHEM MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] 17-4PH is a martensitic precipitation hardening stainless steel, its chemical composition mass percentage is: C≤0.07, Si≤1.0, Mn≤1.0, Cr: 15.5-17.5, Ni: 3.0-5.0, Cu: 2.6-4.6 , Nb: 0.15-0.45, S ≤ 0.03, P ≤ 0.035, this material is cheap, and it is generally used in components that bear heavy loads, such as wrenches, high-power shafts, etc. The usual molding method is to cast a blank, and then mechanically Processed to the size required by the design, the metallographic structure of the finished product is martensite, and its performance characteristics are high strength and high hardness. However, its deformation ability is poor. For the processing of slender shafts, this processing method is obviously impossible. Even if forging and rolling are added in the middle, the final grinding cannot guarantee the

Method used

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  • Method for processing spindly shaft by utilizing 17-4PH stainless steel
  • Method for processing spindly shaft by utilizing 17-4PH stainless steel
  • Method for processing spindly shaft by utilizing 17-4PH stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Using 17-4PH stainless steel to process φ The method of mm major axis includes the following steps:

[0023] (1) Weigh 148kg of industrial pure iron, FeNb70: 1kg, Si-A: 1kg, JMn97: 1kg, JCr99-A: 33kg, electrolytic Ni: 8kg, electrolytic Cu: 8kg, and place the ingredients in a vacuum melting furnace Vacuum melting, the melting temperature is 1600°C, and the melting time is 1.5 hours;

[0024] (2) Pouring the melting liquid after vacuum melting into a mold with a cylindrical cavity in the vacuum chamber, and pouring into a cylindrical ingot of φ200mm;

[0025] (3) Water-cool the poured ingot to room temperature;

[0026] (4) Turning the surface of the ingot;

[0027] (5) After forging the ingot after turning into several sections of φ60mm ingot, put it into water to quench;

[0028] (6) Hot-roll each section of the ingot, the hot-rolling temperature is 900°C, the rolling power is 300 kilowatts, and rolled into a φ32mm ingot, and the hot-rolled ingot is quenched in wat...

Embodiment 2

[0039] Using 17-4PH stainless steel to process φ The method of mm major axis includes the following steps:

[0040] (1) Weigh 149kg of industrial pure iron, FeNb70: 1kg, Si-A: 1kg, JMn97: 1kg, JCr99-A: 33kg, electrolytic Ni: 9kg, electrolytic Cu: 6kg, and place the ingredients in a vacuum melting furnace Vacuum melting, the melting temperature is 1520°C, and the melting time is 1 hour;

[0041] (2) Pouring the melting liquid after vacuum melting into a mold with a cylindrical cavity in the vacuum chamber, and pouring into a cylindrical ingot of φ200mm;

[0042] (3) Water-cool the poured ingot to room temperature;

[0043] (4) Turning the surface of the ingot;

[0044] (5) After forging the ingot after turning into several sections of φ60mm ingot, put it into water to quench;

[0045] (6) Hot-roll each section of the ingot, the hot-rolling temperature is 950°C, the rolling power is 300 kilowatts, and rolled into a φ27mm ingot, and the hot-rolled ingot is quenched in water;...

Embodiment 3

[0056] Using 17-4PH stainless steel to process φ The method of mm major axis includes the following steps:

[0057](1) Weigh 148kg of industrial pure iron, FeNb70: 1kg, Si-A: 1kg, JMn97: 1kg, JCr99-A: 33kg, electrolytic Ni: 8kg, electrolytic Cu: 8kg, and place the ingredients in a vacuum melting furnace Vacuum melting, the melting temperature is 1560°C, and the melting time is 2 hours;

[0058] (2) Pouring the melting liquid after vacuum melting into a mold with a cylindrical cavity in the vacuum chamber, and pouring into a cylindrical ingot of φ200mm;

[0059] (3) Water-cool the poured ingot to room temperature;

[0060] (4) Turning the surface of the ingot;

[0061] (5) After forging the ingot after turning into several sections of φ60mm ingot, put it into water to quench;

[0062] (6) Hot-roll each section of the ingot, the hot-rolling temperature is 925°C, the rolling power is 300 kilowatts, and rolled into a φ24mm ingot, and the hot-rolled ingot is quenched in water;...

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Abstract

The invention relates to a method for processing a spindly shaft by utilizing 17-4PH stainless steel, which comprises the following steps of: taking the 17-4PH stainless steel as a raw material; putting the raw material in a vacuum melting furnace so as to carry out vacuum melting; pouring the melted solution after vacuum melting furnace into a mould which is arranged in a vacuum chamber and is provided with a cylindrical cavity so as to form a ingot casting; forging; hot rolling; hot drawing; cold drawing and age-hardening. Due to the adoption of the technical scheme, the invention provides the method for processing the spindly shaft by utilizing the 17-4PH stainless steel, a metallographic structure of the 17-4PH stainless steel is still kept in an austenite state in a processing process, and the spindly shaft is processed through cold drawing and forming, so that the processed spindly shaft has high strength, high hardness and good deformability.

Description

technical field [0001] The invention relates to a method for processing a slender shaft with stainless steel, in particular to a method for processing a slender shaft with 17-4PH stainless steel. Background technique [0002] 17-4PH is a martensitic precipitation hardening stainless steel, its chemical composition mass percentage is: C≤0.07, Si≤1.0, Mn≤1.0, Cr: 15.5-17.5, Ni: 3.0-5.0, Cu: 2.6-4.6 , Nb: 0.15-0.45, S ≤ 0.03, P ≤ 0.035, this material is cheap, and it is generally used in components that bear heavy loads, such as wrenches, high-power shafts, etc. The usual molding method is to cast a blank, and then mechanically Processed to the size required by the design, the metallographic structure of the finished product is martensite, and its performance characteristics are high strength and high hardness. However, its deformation ability is poor. For the processing of slender shafts, this processing method is obviously impossible. Even if forging and rolling are added in...

Claims

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Application Information

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IPC IPC(8): B23P15/00
Inventor 王为学敬平宋相宇林全权
Owner ZHEJIANG ZHENXING PETROCHEM MACHINERY
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