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Manufacturing method of 23CrNi3Mo alloy steel seamless pipe for drilling tool

A manufacturing method and technology of alloy steel, applied in the field of alloy steel, can solve the problems of poor surface quality, high equipment requirements, low product dimensional accuracy, etc., and achieve the effects of good surface quality, high dimensional accuracy and strong practicability

Inactive Publication Date: 2018-06-08
JIANGSU YINHUAN PRECISION STEEL TUBE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is easy to form by hot rolling, it has the following disadvantages: 1) High equipment requirements, a large hot rolling mill must be used; 2) Low dimensional accuracy of the product; 3) Poor surface quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The present embodiment provides a kind of manufacturing method of 23CrNi3Mo alloy steel seamless pipe for drilling tools, comprising the following steps:

[0057] (1) Peeling and cutting off the round steel;

[0058] (2) The tube blank obtained in step (1) is pierced with a hot piercer, and the obtained tube blank is pierced with a Φ60mm hot piercer, and the capillary specification after piercing is Φ80×17mm;

[0059] (3) Pickling the capillary obtained in the preceding step (2) to remove scale, the pickling temperature is 45°C, and the pickling time is 90 minutes;

[0060] (4) Spheroidizing the steel pipe after pickling obtained in step (3), the heat treatment temperature is 680°C, the holding time is 4h, and then cooled at 15°C / h to ≤450°C, and then air-cooled;

[0061] (5) The heat-treated steel pipe obtained in step (4) is pickled again to remove surface scale. The pickling temperature is 45°C and the pickling time is 90 minutes. The pickling uses sulfuric acid wit...

Embodiment 2

[0068] The present embodiment provides a kind of manufacturing method of 23CrNi3Mo alloy steel seamless pipe for drilling tools, comprising the following steps:

[0069] (1) Peeling and cutting off the round steel;

[0070] (2) The tube blank obtained in step (1) is pierced with a hot piercer, and the obtained tube blank is pierced with a Φ60mm hot piercer, and the capillary specification after piercing is Φ80×17mm;

[0071] (3) Pickling the capillary obtained in the preceding step (2) to remove scale, the pickling temperature is 70°C, and the pickling time is 150 minutes;

[0072] (4) Spheroidizing the steel pipe after pickling obtained in step (3), the heat treatment temperature is 690°C, the holding time is 6h, and then cooled at 30°C / h to ≤450°C and then air-cooled;

[0073] (5) The heat-treated steel pipe obtained in step (4) is pickled again to remove surface scale. The pickling temperature is 70°C, and the pickling time is 150 minutes. The pickling uses sulfuric acid w...

Embodiment 3

[0080] The present embodiment provides a kind of manufacturing method of 23CrNi3Mo alloy steel seamless pipe for drilling tools, comprising the following steps:

[0081] (1) Peeling and cutting off the round steel;

[0082] (2) The tube blank obtained in step (1) is pierced with a hot piercer, and the obtained tube blank is pierced with a Φ60mm hot piercer, and the capillary specification after piercing is Φ80×17mm;

[0083] (3) Pickling the capillary obtained in the preceding step (2) to remove scale, the pickling temperature is 55°C, and the pickling time is 130 minutes;

[0084] (4) Spheroidizing the steel pipe after pickling obtained in step (3), the heat treatment temperature is 685°C, the holding time is 5h, and then cooled at 20°C / h to ≤450°C, and then air-cooled;

[0085] (5) The heat-treated steel pipe obtained in step (4) is pickled again to remove surface scale. The pickling temperature is 60°C, and the pickling time is 120 minutes. Sulfuric acid with a mass concen...

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Abstract

The invention discloses a manufacturing method of a 23CrNi3Mo alloy steel seamless pipe for a drilling tool. The method comprises the following steps of (1) peeling and cutting round steel; (2) performing perforation by a hot perforation machine; (3) performing acid washing to remove scales at the acid washing temperature of 45 to 70 DEG C, wherein the acid washing time is 90 to 150min; (4) performing spheroidization heat treatment on the steel pipe subjected to acid washing, wherein the heat treatment temperature is 680 to 690 DEG C, and the heat insulation time is 4 to 6h; (5) performing acid washing again on the steel pipe subjected to heat treatment for removing surface scales, wherein the acid washing temperature is 45 to 70 DEG C, and the acid washing time is 90 to 150min; (6) performing cold rolling treatment with the feeding quantity of 1 to 2mm per time; (7) performing spheroidization heat treatment again on the steel pipe subjected to cold rolling treatment, wherein the heattreatment temperature is 680 to 690 DEG C, and the heat insulation time is 4 to 6h; (8) performing acid washing on the steel pipe subjected to heat treatment, wherein the acid washing temperature is 45 to 70 DEG C, and the acid washing time is 90 to 150min; (9) performing straightening; (10) performing finished product value management detection and surface inspection; performing packaging and warehouse entering after the constant cutting and marking on qualified products.

Description

technical field [0001] The invention relates to the technical field of alloy steel, in particular to a method for manufacturing a 23CrNi3Mo alloy steel seamless pipe for a drilling tool. Background technique [0002] Rock drilling tools are consumable tools that have the worst stress conditions, the shortest service life, high technical content, and are necessary for basic industries among steel machines and tools. 23CrNi3Mo steel, as a low-carbon Cr, Ni, Mo alloy steel, is widely used in the production process of drill bit, drill tail and drill rod in the drill steel and drill tool industry at home and abroad. [0003] The hardness of 23CrNi3Mo alloy pipe is very high. At present, it is manufactured by hot rolling at home and abroad. Although it is easy to form by hot rolling, it has the following disadvantages: 1) high equipment requirements, and a large hot rolling mill must be used; 2) low dimensional accuracy of the product; 3) poor surface quality. Contents of the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06C21D9/08C21D8/10C21D1/32
CPCB21C37/06C21D1/32C21D8/105C21D9/08C21D2211/005
Inventor 罗旭吴青松高佩王植栋
Owner JIANGSU YINHUAN PRECISION STEEL TUBE CO LTD
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