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Novel high-temperature alloy heat-resistant stainless steel bolt and production process thereof

A technology of heat-resistant stainless steel and high-temperature alloy, applied in the field of fasteners, can solve the problems of limiting the application of bolts and the influence of strength, and achieve the effects of low notch sensitivity, high relaxation resistance, good machining performance and heat treatment performance.

Active Publication Date: 2014-09-17
江苏新迅达不锈钢制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bolts made of heat-resistant stainless steel, because they cannot be quenched and tempered, their strength is affected, which limits the application of bolts made of heat-resistant stainless steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A new type of superalloy heat-resistant stainless steel bolt and its production process, its composition mass percentage is: C: 0.07, Si: 0.08, Mn: 1.50, P: 0.030, S: 0.030, Ni: 25.9, Cr: 15.0, Ti: 2.20 , A1: 0.30, Mo: 1.3, the balance of Fe and unavoidable impurities; its production process: take the above-mentioned component raw materials, undergo solid solution, cold heading forming, recrystallization annealing, stress relief tempering, hexagon head cutting and thread rolling , cleaning, stabilization treatment, and aging treatment, which specifically include the following steps:

[0023] ⑴. Prepare materials for solid solution, keep warm at 995±10°C for 1.5h, and then water-cool;

[0024] ⑵, Cold heading forming, cold heading out the head and rod of the bolt on the two-die and two-punch (double-click the whole mold) cold heading machine;

[0025] (3) Recrystallization annealing, temperature 830-850°C, heat preservation 2-3h, use equipment RQ3-90-9D, use methanol 20...

Embodiment 2

[0033] A new type of high-temperature alloy heat-resistant stainless steel bolt and its production process, its composition mass percentage is: C: 0.05, Si: 008, Mn1.50, P: 0.03, S: 0.025, Ni: 26.5, Cr: 15.5, Ti: 2.00 , A1: 0.30, Mo: 1.05, the balance of Fe and unavoidable impurities; its production process: take the above-mentioned component raw materials, undergo solid solution, cold heading forming, recrystallization annealing, stress relief tempering, hexagon head cutting and thread rolling , cleaning, stabilization treatment, and aging treatment, which specifically include the following steps:

[0034] ⑴. Prepare materials for solid solution, keep warm at 995±10°C for 1.5h, and then water-cool;

[0035] ⑵, Cold heading forming, cold heading out the head and rod of the bolt on the two-die and two-punch (double-click the whole mold) cold heading machine;

[0036] (3) Recrystallization annealing, temperature 830-850°C, heat preservation 2-3h, use equipment RQ3-90-9D, use me...

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Abstract

The invention discloses a novel high-temperature alloy heat-resistant stainless steel bolt and a production process thereof. The bolt comprises the components of, by mass, no more than 0.08% of C, no more than 1.00% of Si, no more than 2.00% of Mn, no more than 0.035% of P, no more than 0.030% of S, 24.0-27.0% of Ni, 13.5-16.0% of Cr, 1.90-2.23% of Ti, no more than 0.35% of Al, no more than 0.10-1.50% of Mo, and balance of Fe and unavoidable impurities. The production process comprises that the raw materials are subjected to the steps of solid smelting, cold heading molding, re-crystallization and annealing, stress-removing tempering, hexagon-head cutting and wire rolling, washing, stabilization treatment, and aging treatment. With the process, the bolt has the advantages of high strength, high relaxation-resistance, low notch sensitivity, certain endurance strength, good oxidation resistance, and the like.

Description

technical field [0001] The invention relates to the technical field of fasteners, in particular to a novel high-temperature alloy heat-resistant stainless steel bolt and a production process. Background technique [0002] In the prior art, heat-resistant stainless steel can be divided into four types according to the internal structure characteristics of the steel: austenitic, ferritic, martensitic and precipitation hardening. Heat-resistant stainless steel cannot be quenched and tempered, and its strength can only be obtained by cold work hardening and alloying elements strengthening into precipitation hardening. The bolts made of heat-resistant stainless steel cannot be quenched and tempered, and their strength is affected, thus limiting the application of bolts made of heat-resistant stainless steel. Contents of the invention [0003] In order to solve the deficiencies of the prior art, the present invention provides a new superalloy heat-resistant stainless steel bolt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C22C38/52
Inventor 朱根玉范军平符红所莫志鹏韩晶晶徐鸣
Owner 江苏新迅达不锈钢制品有限公司
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