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Quenching and tempering heat treatment process for improving flaw detection clutters of 2Cr13 rotor

A quenching and tempering heat treatment, 2cr13 technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve problems such as coarse rotor structure, difficult production operation control, and inability to effectively improve rotor flaw detection clutter problems, so as to avoid flaw detection Inconsistency, overall uniformity, and the effect of meeting market demand

Active Publication Date: 2021-08-13
HENAN ZHONGYUAN SPECIAL STEEL EQUIP MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For 2Cr13 steel, it is mainly used to produce rotors, modules, round bars and other products. Due to the high Cr alloy content of this steel, the alloy range is 12%-14%, and the production operation is not easy to control. The structure is coarse, and the 2Cr13 rotor was inspected after annealing, and it was found that there was serious clutter, and the clutter was as high as more than 80%, which caused the flaw detection to be unqualified. To improve the problem of rotor flaw detection clutter, therefore, there is an urgent need for a quenching and tempering heat treatment process to improve 2Cr13 rotor flaw detection clutter

Method used

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  • Quenching and tempering heat treatment process for improving flaw detection clutters of 2Cr13 rotor
  • Quenching and tempering heat treatment process for improving flaw detection clutters of 2Cr13 rotor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: A regulating heat treatment process for improving 2Cr13 rotor flawless waves: 2Cr13 chemical composition: C = 0.2%, Si = 0.3%, Mn = 0.59%, Cr = 12.55%, Ni = 0.29%, S = 0.003%, P = 0.014%, MO = 0.14%; Specifications: φ560mm step axis; flawless waves: 80% failed.

[0016] The heat treatment process step is specifically as follows:

[0017] Step 1), quenched: 12-meter deep well heating furnace production, the furnace temperature is controlled in ≤ 500 ° C, the temperature is warmed to 650 ± 20 ° C, and the temperature will be ≥100 ° C / h after heat temperature The temperature is warmed to 1000 ± 10 ° C for heat preservation, after the heat preservation is cooled, the air cooling time is 50s, the oil is 135min, the oil temperature is controlled in ≤50 ° C;

[0018] Step 2), high temperature tempering: When the step 1) is performed, the rotor is loaded into a 12-meter deep well heating furnace for high temperature tempering, the furnace temperature is controlled at ≤...

Embodiment 2

[0025] Example 2: An Improved Temperature Treatment Process, Steel Treatment: 2Cr13; Chemical Components: C = 0.22%, Si = 0.32%, Mn = 0.51%, Cr = 12.62%, Ni = 0.09% , S = 0.003%, P = 0.013%, MO = 0.04%; specifications: φ630mm step axis; flawless waves: 80% failed.

[0026] The tuning process is as follows:

[0027] Step 1), once quenched: 12-meter deep well heating furnace production, the furnace temperature is controlled in ≤ 500 ° C, the temperature is raised to 680 ± 20 ° C, and the temperature will be ≥100 ° C / h after heating speed after heat The temperature is warmed to 1000 ± 10 ° C for insulation, and after the insulation is 13h, the cooling time is released, and the air cooling time is 60 m, and then the oil temperature is 160 min, and the oil temperature is controlled in ≤50 ° C;

[0028] Step 2), high temperature tempering: When the step 1) is performed, load the rotor into 12 meters deep well heating furnace production, perform high temperature tempering, the furnace ...

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Abstract

The invention relates to a quenching and tempering heat treatment process for improving flaw detection clutters of a 2Cr13 rotor. The process comprises the following steps: primary quenching: adopting a pit type heating furnace for production at the furnace temperature of less than or equal to 500 DEG C, heating to 550-700 DEG C at the speed of less than or equal to 50 DEG C / h-100 DEG C / h, preserving heat for 3-6 hours, heating to 980-1040 DEG C at the speed of more than or equal to 100 DEG C / h, preserving heat for 5-30 hours, discharging and cooling; high-temperature tempering: heating to 550-750 DEG C at the furnace temperature of less than or equal to 450 DEG C at the speed of less than or equal to 50 DEG C / h-100 DEG C / h, preserving heat for 10-40 hours, discharging, performing oil cooling, and performing air cooling to the room temperature after oil cooling to 300-400 DEG C of a workpiece; secondary quenching: heating to 550-700 DEG C at the furnace temperature of less than or equal to 500 DEG C at the speed of less than or equal to 50 DEG C / h-100 DEG C / h, preserving heat for 3-6 hours, then heating to 980-1040 DEG C at the speed of more than or equal to 100 DEG C / h, preserving heat for 5-30 hours, and then discharging and cooling; high-temperature tempering: heating to 550-750 DEG C at the furnace temperature of less than or equal to 450 DEG C at the speed of less than or equal to 50 DEG C / h-100 DEG C / h, discharging, performing oil cooling, and performing air cooling to the room temperature after the temperature is 300-400 DEG C; and low-temperature tempering: heating to 550-750 DEG C at the furnace temperature of less than or equal to 450 DEG C at the speed of less than or equal to 50 DEG C / h-100 DEG C / h, preserving heat for 10-40 hours, and then discharging and air-cooling to room temperature, so that the internal structure of the rotor can be homogenized, and the phenomenon that flaw detection of the rotor is not consistent due to serious flaw detection clutters is avoided.

Description

Technical field [0001] The present invention belongs to the technical field of metal material heat treatment, and it is particularly related to a heat treatment process for solving the severity of 2Cr13 rotor flawless waves and improving product quality. Background technique [0002] The CR13 stainless steel is martensite heat-resistant stainless steel. It has good corrosion resistance, thermal strength and impact toughness after returning to fire, mainly for manufacturing rotors, measuring tools, cutting tools, medical devices and tableware, and the like. For 2Cr13 steel, it is mainly used to produce rotors, modules, round bats and other products. Since this steel type CR alloy content is high, the alloy ranges from 12% -14%, the production operation is not easy to control, after high temperature forging, cause the rotor inside the rotor The tissue is thick, and the 2CR13 rotor is tissue, and the 2CR13 rotor is detected. It has been found that there is more than 80% of the clutt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D9/00
CPCC21D1/18C21D9/0068Y02P10/20
Inventor 周鹏雷冲王雪松张巧换郑安雄李占华李玉标双伟鹏
Owner HENAN ZHONGYUAN SPECIAL STEEL EQUIP MFG CO LTD
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