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Heat treatment process for ASDO clamp products

A process and wire clip technology, applied in the field of heat treatment of ASDO wire clip products, can solve the problems of substandard mechanical properties, low Charpy impact value, unable to meet requirements, etc., to ensure hardenability, eliminate internal stress, prevent Distortion effect

Inactive Publication Date: 2012-10-03
JIANGSU JINSHI CASTING & FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As we all know, ASDO wire clip products are key structural parts of large-scale construction projects, and the quality requirements are extremely high. In addition to meeting the mechanical performance requirements, no defects are allowed. The specific impact value is low and cannot meet the requirements of this product

Method used

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  • Heat treatment process for ASDO clamp products
  • Heat treatment process for ASDO clamp products
  • Heat treatment process for ASDO clamp products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: According to the following steps to produce M100 clamp

[0017] (1) Normalizing treatment: first heat the workpiece to 860±10°C for 2 hours, then take it out of the furnace and cool it to room temperature;

[0018] (2) Quenching treatment: firstly, heat the workpiece after the above normalizing treatment to 700±10°C for 3 hours; then, continue to heat up to 930±10°C for 4 hours; Quenching in 10% PQG quenching liquid for 10 minutes; finally, the quenched workpiece is cooled to 200°C in the water cooling pool and dried for a while;

[0019] (3) Tempering treatment: First, the workpiece after the above quenching treatment is heated to 450±10°C for 1 hour; then, the temperature is raised to 630±10°C for 7 hours; finally, it is air-cooled to 500°C, and then The water-cooled pool is cooled to 200°C to discharge water and cooled to room temperature.

Embodiment 2

[0020] Embodiment 2: According to the following steps to produce M110 clamp

[0021] (1) Normalizing treatment: first heat the workpiece to 860±10°C for 2.5 hours, then take it out of the furnace and cool it to room temperature;

[0022] (2) Quenching treatment: First, the workpiece after the above normalizing treatment is heated to 700±10°C for 3.5 hours; then, continue to heat up to 930±10°C for 4.5 hours; then, out of the furnace at a temperature ≤ 38°C mass concentration Quenching in 11% PQG quenching liquid for 15 minutes; finally, the quenched workpiece is cooled to 250°C in the water cooling pool and dried for a while;

[0023] (3) Tempering treatment: First, the workpiece after the above quenching treatment is heated to 450±10°C for 1.5 hours; then, the temperature is raised to 630±10°C for 8 hours; finally, it is air-cooled to 500°C, and then The water cooling pool is cooled to 250°C to discharge water and cooled to room temperature.

Embodiment 3

[0024] Embodiment 3: According to the following steps to produce M120 clamp

[0025] (1) Normalizing treatment: first heat the workpiece to 860±10°C for 3 hours, then take it out of the furnace and cool it to room temperature;

[0026] (2) Quenching treatment: First, heat the workpiece after the above-mentioned normalizing treatment to 700±10°C for 4 hours; then, continue to heat up to 930±10°C for 5 hours; Quenching in 12% PQG quenching liquid for 20 minutes; finally, the quenched workpiece is cooled to 300°C in the water cooling pool and dried for a while;

[0027] (3) Tempering treatment: First, the workpiece after the above quenching treatment is heated to 450±10°C for 2 hours; then, the temperature is raised to 630±10°C for 9 hours; finally, it is air-cooled to 500°C, and then The water-cooled pool is cooled to 300°C to discharge water and cooled to room temperature.

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Abstract

The invention discloses a heat treatment process for ASDO clamp products, comprising the following steps: normalizing: firstly heating the workpieces to 860+ / -10 DEG C and preserving the heat for 2-3h and then discharging the workpieces and cooling the workpieces to the room temperature; quenching: firstly heating the normalized workpieces to 700+ / -10 DEG C and preserving the heat for 3-4.5h, secondly continuing raising the temperature to 930+ / -10 DEG C and preserving the heat for 4-6h, thirdly discharging the workpieces and quenching the workpieces in PQG quenching liquid with temperature being not more than 38 DEG C and mass concentration being 10-12% for 10-20min and finally cooling the quenched workpieces in a water-cooling pool to 200-300 DEG C until water exits and slightly airing the workpieces; and tempering: firstly heating the quenched workpieces to 450+ / -10 DEG C and preserving the heat for 1-2h, secondly raising the temperature to 630+ / -10 DEG C and preserving the heat for7-11h and finally discharging the workpieces, air-cooling the workpieces to 500 DEG C, then cooling the workpieces in the water-cooling pool to 200-300 DEG C until water exits and cooling the workpieces to the room temperature. The heat treatment process is adopted for processing the close-distance clamp products, ensures that the mechanical performance of the processed close-distance clamp products can meet the design and construction requirements, reduces the product reject rate and improves the labor efficiency.

Description

technical field [0001] The invention relates to the field of heat treatment, and is a heat treatment process, specifically a heat treatment process for ASDO wire clip products. Background technique [0002] As we all know, ASDO wire clip products are key structural parts of large-scale construction projects, and the quality requirements are extremely high. In addition to meeting the mechanical performance requirements, no defects are allowed. The specific impact value is low and cannot meet the requirements of this product. The specific chemical composition and mechanical performance requirements of ASDO clamps are shown in Table 1 and Table 2: [0003] Table 1 Chemical composition (%) [0004] [0005] Table 2 Mechanical properties [0006] Contents of the invention [0007] The purpose of the present invention is to provide a heat treatment process for ASDO wire clamp products, and use the heat treatment process to process the close distance wire clamp products,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/00C21D11/00
Inventor 张辉
Owner JIANGSU JINSHI CASTING & FORGING
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