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A manufacturing process of 10cr9mo1vnb steel forging

A manufacturing process, steel forging technology, applied in the field of 10Cr9Mo1VNb steel forging manufacturing process, can solve the problems of long annealing time, low forging temperature, large internal stress of forgings, etc.

Active Publication Date: 2016-01-13
WUXI HONGDA HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the relatively low forging temperature of this kind of manufacturing process, the internal stress of the forging is relatively large. If the stress cannot be fully removed during annealing after forging, the stress will be too large and the forging will be cracked and scrapped.
The annealing process cannot refine the grain well for this material, which affects the quality of the final product, and the annealing time is longer, which affects the production efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0032] 10Cr9Mo1VNb steel forging manufacturing process:

[0033] (1) Heating temperature and time: 1250℃×6~8 hours;

[0034] (2), the first normalizing temperature and time: 920 ° C × 9 hours, the first tempering plus temperature and time: 680 ° C × 18 hours;

[0035] (3), the second normalizing temperature and time: 1030℃×9 hours, the second tempering temperature and time: 680℃×18 hours;

[0036] The normalizing time is 1.5-2 hours per 100mm, and the tempering time is 2.5-3 hours per 100mm.

[0037] (1) Chemical composition of 10Cr9Mo1VNb steel:

[0038]

C Si mn Cr P S Ni Mo V W index 0.20～0.25 ≤0.05 0.50～1.00 11.00～13.00 ≤0.035 ≤0.030 0.50～1.00 0.75～1.25 0. 20～0.40 0.70～1.25 Measured 0.22 0.03 0.69 12.00 0.025 0.025 0.75 1.06 0.30 0.91

[0039] (2) Mechanical properties of 10Cr9Mo1VNb steel forgings:

[0040] (1) Tensile strength σ0.2 (MPa): Quenching and tempering ≥ 885;

[0041] (2) Conditional yield strength σs...

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Abstract

The invention provides a 10Cr9Mo1VNb steel forge piece manufacturing process which can well reduce internal stress of a forge piece and effectively avoid forge piece cracking and scrapping, can well refined grains, accordingly ensures the final product quality, reduces the annealing time and improves the production efficiency. The 10Cr9Mo1VNb steel forge piece manufacturing process is characterized by comprising the following steps of 1 heating the 10Cr9Mo1VNb steel forge piece, wherein the heating temperature is 850-1250 DEG C; 2 forging the heated 10Cr9Mo1VNb steel forge piece; 3 performing primary normalizing and tempering on the forged 10Cr9Mo1VNb steel forge piece; 4 performing secondary normalizing and tempering on the primarily normalized and tempered 10Cr9Mo1VNb steel forge piece.

Description

technical field [0001] The invention relates to the technical field of forging technology of mechanical parts, in particular to a manufacturing technology of 10Cr9Mo1VNb steel forging. Background technique [0002] F91 steel material is the American standard material. It was researched and developed by ORNL (Oak Ridge National Laboraty) in the 1970s, and it was included in ASME in 1983. It is SA213-T91, mainly to fill pearlitic heat-resistant steel and Blank steel for new steam and water pipes used in the temperature range of 600-650 °C between austenitic stainless steels. Due to its excellent normal temperature performance, excellent durability and creep performance below 650°C, low linear expansion coefficient, good manufacturability, and low cost (alloy content 9.5-11.5%), F91 steel has excellent performance under long-term operation. The stability of the organization enables it to be promoted and developed rapidly. In our country, it was renamed as 10Cr9Mo1VNb after th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21K1/16C21D6/00
Inventor 张伟东张忠明王忠安
Owner WUXI HONGDA HEAVY IND