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Manufacturing method of wolfram-contained austenite stainless steel seamless tube

A manufacturing method and tungsten austenite technology, applied in the direction of manufacturing tools, metal rolling, furnaces, etc., can solve problems such as poor product quality, and achieve the effects of avoiding hot processing, good room temperature performance, and improving grain uniformity.

Inactive Publication Date: 2017-05-24
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention discloses a forging method for a tungsten-containing austenitic heat-resistant steel pipe billet to solve the problem of poor product quality in the current manufacture of tungsten-containing austenitic stainless steel seamless pipes

Method used

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  • Manufacturing method of wolfram-contained austenite stainless steel seamless tube
  • Manufacturing method of wolfram-contained austenite stainless steel seamless tube
  • Manufacturing method of wolfram-contained austenite stainless steel seamless tube

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Embodiment 1

[0057] The finished product specification of the seamless pipe in this embodiment is Ф45×10mm, and the specific components are as follows (mass fraction%), and the balance in the following table is Fe:

[0058] C Si MnPSCr NiWCu Nb BN 0.050.190.500.0140.00221.8024.803.602.820.420.00250.18

[0059] Taking the tube blank of Φ219 / 50mm as an example, the main process specification design is:

[0060] Φ219 / 50mm→(extrusion) Ф108×18mm→(first cold rolling) Ф76×13mm→(second cold rolling) Ф57×10mm.

[0061] Specific steps are as follows:

[0062] Step 1: Make the tube blank into a waste tube.

[0063] Sub-step B1, preparation of tube blank.

[0064] Using Φ219mm tube blank, deep hole drill drills a Φ50mm through hole in the center, one end face is chamfered and processed into a 40° bell mouth, and the tube blank is surface treated.

[0065] Substep B2, preheating of the ring furnace.

[0066] Put the tube blank into the ring furnace for preheating, the furnace temperature is 550°C, the total heat...

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Abstract

The invention discloses a manufacturing method of a wolfram-contained austenite stainless steel seamless tube. The method comprises following steps: 11, a tube blank is manufactured into a pierced billet, in the process of manufacturing the pierced billet, the extrusion ratio of extrusion to the pierced billet ranges from 6 to 12, and the extrusion speed ranges from 130 to 180mm / s; 12, the pierced billet is subject to first-pass cold rolling, and the pass deformation amount of the first-pass cold rolling ranges from 40% to 60%; 13, intermediate annealing treatment is applied to the pierced billet subject to first-pass cold rolling, the annealing temperature ranges from 1120 DEG C to 1200 DEG C, and heat preservation is carried out for 30 min to 60 min; 14, second-pass cold rolling is applied to the pierced billet subject to intermediate annealing treatment, and the pass deformation amount of the second-pass cold rolling is controlled to range from 35% to 50%; 15, the pierced billet subject to second-pass cold rolling is subject to heat treatment, temperature of heat treatment ranges from 1150 DEG C to 1250 DEG C, and heat preservation is carried out for 30 min to 60 min. The manufacturing method solves the problem that the product quality of a wolfram-contained austenite stainless steel seamless tube manufactured at present is poor.

Description

Technical field [0001] The invention relates to the technical field of steel pipe manufacturing, in particular to a method for manufacturing a tungsten-containing austenitic stainless steel seamless pipe. Background technique [0002] Austenitic heat-resistant steel is widely used in energy, chemical and other fields due to its excellent corrosion resistance, oxidation resistance and good mechanical properties. Since the austenitic heat-resistant steel containing tungsten (W) has high toughness, durability, oxidation resistance and high-temperature structural stability, seamless tubes made of austenitic heat-resistant steel containing tungsten can be used for 650 The superheater and reheater of ℃-700℃ ultra-supercritical thermal power unit boiler. The main components of tungsten-containing austenitic heat-resistant steel are 0.03%-0.08% C, less than 0.5% Si, less than 0.5% Mn, 18% to 25% Cr, 21.5% to 31% Ni, 2 to 4% Cu, 0.10 ~0.35% N, 0.30 ~ 0.65% Nb, 1.0 ~ 5.0% W, 0.1 ~ 0.4% M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/52C22C38/44C22C38/48C22C38/54C21D8/10C21D1/26C21D9/08B21B3/02B21B23/00
CPCC22C38/02B21B3/02B21B23/00B21B2201/02C21D1/26C21D8/105C21D9/08C22C38/001C22C38/04C22C38/42C22C38/44C22C38/48C22C38/52C22C38/54
Inventor 方旭东高建兵李阳夏焱王志斌李建民
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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