CN101070581A

CN101070581A - Stainless-steel seamless steel-pipe perforation push head

Info

Publication number: CN101070581A
Application number: CN 200610040273
Authority: CN
Inventors: 马中亮
Original assignee: JIANGSU NANSHAN METALLURGICAL MACHINE Manufacturing Co Ltd
Current assignee: JIANGSU NANSHAN METALLURGICAL MACHINE Manufacturing Co Ltd
Priority date: 2006-05-12
Filing date: 2006-05-12
Publication date: 2007-11-14

Abstract

The seamless steel pipe perforation head of stainless steel, which is mainly composed by the elements such as carbon, iron, chromium, among them, C is 0.19-0.39%,Cr is 0.2-1.4%, Ni is 0.35-2.0%, Co is 0.3-1.8%, Si is 0.1-1.0%, Mn is0.1-0.9%, Mo is 0.3-2.3%, W is 0.5-4%, Nb is 0.1-1.3%, the remainders are Fe and few other elements (its content counts by weight percent). Because adding the alloy element, so it enable the perforation head intensity to enhance highly, not only satisfy the rigidity of perforation need to have, but also has good heat resistant performance, when putting and making the stainless steel seamless steel pipe, its service life is as two to three times as the similar abroad products, thus it can reduce the production cost largely.

Description

Stainless-steel seamless steel-pipe perforation push head

Technical field: the present invention relates to the perforating head that a kind of rolling seamless steel pipe is used, particularly relate to a kind of used stainless-steel seamless steel-pipe perforation push head of boiler of power plant pipe that is mainly used to process.

Technical background: at a lot of metallurgy industries of China, when piercing weldless steel tube, all adopt perforating head, this class perforating head generally can only penetrate the softer steel pipe of material.If produce the employed boi1er tube of boiler, then be difficult to penetrate, these class steel generally all adopt stainless steel as base material, have rigidity and hardness than Strong, generally all adopt external perforating head when producing this series products.On the one hand, must adopt a large amount of foreign exchanges just can buy the price comparison costliness; On the other hand, when reality was used, the perforating head of general import because the material of material is hard, will be scrapped when piercing two, three stainless-steel seamless pipes when piercing stainless-steel seamless pipe, is unfavorable for the production in enormous quantities of enterprise, and the production cost height.

Summary of the invention: purpose of the present invention will provide a kind of stainless-steel seamless steel-pipe perforation push head exactly, and it can overcome the defective of external like product effectively, can reach two to three times of external like product its work-ing life.The object of the present invention is achieved like this, and stainless-steel seamless steel-pipe perforation push head mainly is made up of carbon, iron, chromium, molybdenum element, it is characterized in that: described C is 0.19-0.39%, Cr is 0.2-1.4%, and Ni is 0.35-2.0%, and Co is 0.3-1.8%, Si is 0.1-1.0%, Mn is 0.1-0.9%, and Mo is 0.3-2.3%, and W is 0.5-4%, Nb is 0.1-1.3%, and all the other are Fe and a small amount of other element (its content is equal to percentage by weight Suan).Owing to added alloying element, make the Strong degree of perforating head obtain significantly improving, it is the necessary rigidity of Ke Yi Full foot perforation not only, also has good heat resistance simultaneously, when piercing stainless-steel seamless pipe, be two to three times of similar external product its work-ing life, thereby reduced its production cost significantly, and can save foreign exchange in large quantities.

Embodiment: stainless-steel seamless steel-pipe perforation push head of the present invention mainly is made up of carbon, iron, chromium, molybdenum element, it is characterized in that: described C is 0.29%, Cr is 0.8%, and Ni is 1.2%, and Co is 1.05%, Si is 0.55%, Mn is 0.5%, and Mo is 1.3%, and W is 2.25%, Nb is 0.7%, and all the other are Fe and a small amount of other element (its content is equal to percentage by weight Suan).During concrete enforcement, prepare suitable material according to formulation ratio of the present invention, the weight of material is by weight per-cent Ji Suan all, joins in the stove by service requirements.The top blank can adopt foundry goods or direct production to become forging when coming out of the stove.When producing foundry goods, after the excision of foundry goods dead head, should leave certain process redundancy.When producing to forging, its forging burn-off phenomenon that do not have.Carry out mechanical workout and top thermal treatment then on request.When the thermal treatment of top, the internal layer zone of oxidation depth of top should be less than 0.1mm, and matrix hardness should be not less than 270HBS, and has the microstructure that adapts with material and thermal treatment process.

Claims

1. stainless-steel seamless steel-pipe perforation push head mainly is made up of carbon, iron, chromium, molybdenum element, it is characterized in that: described C is 0.19-0.39%, Cr is 0.2-1.4%, and Ni is 0.35-2.0%, and Co is 0.3-1.8%, Si is 0.1-1.0%, Mn is 0.1-0.9%, and Mo is 0.3-2.3%, and W is 0.5-4%, Nb is 0.1-1.3%, and all the other are Fe and a small amount of other element (its content is equal to percentage by weight Suan).