CN102494948A - Method for simulating deformation of tension side of elbow by tension - Google Patents

Method for simulating deformation of tension side of elbow by tension Download PDF

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Publication number
CN102494948A
CN102494948A CN2011104071604A CN201110407160A CN102494948A CN 102494948 A CN102494948 A CN 102494948A CN 2011104071604 A CN2011104071604 A CN 2011104071604A CN 201110407160 A CN201110407160 A CN 201110407160A CN 102494948 A CN102494948 A CN 102494948A
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CN
China
Prior art keywords
sample
tension
stretches
deflection
distance
Prior art date
Application number
CN2011104071604A
Other languages
Chinese (zh)
Inventor
王建泳
张波
王崇斌
Original Assignee
上海锅炉厂有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 上海锅炉厂有限公司 filed Critical 上海锅炉厂有限公司
Priority to CN2011104071604A priority Critical patent/CN102494948A/en
Publication of CN102494948A publication Critical patent/CN102494948A/en

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Abstract

The invention discloses a method for simulating the deformation of a tension side of an elbow by tension. The method comprises the following steps of: uniformly dotting on a certain surface of a strip-shaped sample or a whole tube sample for tension along the longitudinal direction; uniformly equalizing the sample; accurately measuring the distance between every two points; selecting different tensile distances according to different deformations for tests; carrying out a tensile test on tensile test equipment; then accurately measuring the distance between every two points after tension; calculating the deformation according to the change of the distances between every two points before and after tension; and finally, cutting the uniformly-deformed part and processing the uniformly-deformed part into a mechanical property sample. According to the method disclosed by the invention, the samples with different tensile deformations can be obtained by adopting the tensile test; the states of the samples approach to the actual stress state at the tensile side of the elbow; and a mechanical property test can be carried out through the sample obtained by tension, thereby the performance of materials at the tensile side of the elbow is learned.

Description

A kind of method with the simulation elbow tension side deflection that stretches
Technical field
The present invention relates to a kind of method, belong to station boiler steel pipe bend pipe deformation technology field with the simulation elbow tension side deflection that stretches.
Background technology
According to the requirement of relevant boiler material manufacturer's standard, deflection is not bent after-baking less than about 15% steel elbow.Along with the increase of directly using steel elbow bursting accident on the station boiler parts without thermal treatment, the characteristic after must bending steel pipe, especially performance such as creep rupture strength and stress corrosion is reappraised and experimental study.Because the special shape of elbow can't be processed conventional performance sample, so the performance study data of this type of famine elbow.
Domestic also do not have to be directed against specially the seamless steel tube for boiler elbow is processed into performance sample research experiment with its deflection of simulation that stretches a method.
Summary of the invention
A kind of method with the simulation elbow tension side deflection that stretches provided by the invention can be carried out mechanical property test through the sample that obtains that stretches, thereby understood the material property of elbow tensile side.
In order to achieve the above object, the present invention provides a kind of method with the simulation elbow tension side deflection that stretches, and it is characterized in that, comprises following steps:
The size of sample is accurately measured in step 1, intercepting and be processed into flawless bar-shaped sample of surfacing or homogeneous tube sample on steel pipe;
Step 2, on the homogeneous tube sample, longitudinally evenly get ready stretching longitudinally evenly to get ready perhaps,, accurately measure the distance between the each point the uniform five equilibrium of sample with certain face of bar-shaped sample;
Step 3, according to the different distortion amount of test needs, select the different stretch distance, on tensile test equipment, carry out tension test;
Step 4, the accurate distance that stretches between the each point of back of measuring are calculated deflection through the variable in distance that stretches between the each point of front and back;
The part of step 5, intercepting homogeneous deformation is processed into the mechanical property sample.
In the described step 1, the length of bar-shaped sample or homogeneous tube sample is not less than 150mm.
In the described step 1, accurately measure the length and width of bar-shaped sample, thick or homogeneous tube specimen length.
In the described step 4, deflection=(each dot spacing-primary leading of back stretches)/primary leading * 100%.
The present invention adopts tension test can obtain the sample of different stretch deflection, and is approaching with the tensile side stress state of actual elbow, can carry out mechanical property test through the sample that obtains that stretches, thereby understand the material property of elbow tensile side.
Embodiment
A kind of method with the simulation elbow tension side deflection that stretches provided by the invention comprises following steps:
Step 1, intercepting and be processed into bar-shaped sample or the homogeneous tube sample that length is not less than 150mm on steel pipe, bar-shaped sample surface should smooth zero defects, accurately measure the size (comprising length and width, thick) or the homogeneous tube specimen length of bar-shaped sample;
Step 2, on the homogeneous tube sample, longitudinally evenly get ready stretching longitudinally evenly to get ready perhaps,, accurately measure the distance between the each point the uniform five equilibrium of sample with certain face of bar-shaped sample;
Step 3, according to the different distortion amount of test needs, select the different stretch distance, on tensile test equipment, carry out tension test;
Step 4, the accurate distance that stretches between the each point of back of measuring are calculated deflection through the variable in distance that stretches between the each point of front and back;
Deflection=(each dot spacing-primary leading of back stretches)/primary leading * 100%;
The part of step 5, intercepting homogeneous deformation is processed into the mechanical property sample.
Embodiment 1
Step 1, with T23 steel pipe processing growth 200mm, wide 12mm, thickness are the strip of 9mm;
Step 2, vertically the drawing a straight line of bar-shaped sample, whenever on vertical straight line make a call to a point at a distance from 10mm, carry out the accurate measurement of distance between two points;
Step 3, bar-shaped sample is carried out the longitudinal stretching distortion with the deformation velocity of bend pipe;
The distance that step 4, measurement stretch between the each point of back is 11.1mm, calculates deflection=(each dot spacing-primary leading after stretching)/primary leading * 100%, the actual measurement deflection=(11.1-10)/10 * 100%=11%;
The homogeneous deformation part of step 5, intercepting stretcher strain sample is processed into the sample that mechanical property test needs with homogeneous deformation test portion partly.
The T23 strip that embodiment 1 is made is out of shape sample, the heat treated distortion sample of T23; Again the bar-shaped mechanical property sample that is processed into specification and is Φ 6 * 30 mm carries out performance test; The result can estimate the comprehensive mechanical property of elbow tensile side strictly according to the facts, and test result is seen table 1.Respond well.
The Mechanics Performance Testing result of table 1 T23 steel pipe 11% simulated strain amount sample
Embodiment 2
Step 1, intercepting one segment length 450 mm, the TP347H steel pipe of specification Φ 51 * 6.5;
Step 2, vertically draw a straight line,, carry out the accurate measurement of distance between two points vertically whenever making a call to a point on the straight line at a distance from 10 mm along steel pipe;
Step 3, the tubulose sample is carried out the longitudinal stretching distortion with the deformation velocity of bend pipe;
The distance that step 4, measurement stretch between the each point of back is 14.2mm, calculates deflection=(each dot spacing-primary leading after stretching)/primary leading * 100%, the actual measurement deflection=(14.2-10)/10 * 100%=42%;
The homogeneous deformation part of step 5, intercepting stretcher strain sample obtains the sample of different homogeneous deformation amounts.
Although content of the present invention has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited appended claim.

Claims (4)

1. the method with the simulation elbow tension side deflection that stretches is characterized in that, comprises following steps:
The size of sample is accurately measured in step 1, intercepting and be processed into flawless bar-shaped sample of surfacing or homogeneous tube sample on steel pipe;
Step 2, on the homogeneous tube sample, longitudinally evenly get ready stretching longitudinally evenly to get ready perhaps,, accurately measure the distance between the each point the uniform five equilibrium of sample with certain face of bar-shaped sample;
Step 3, according to the different distortion amount of test needs, select the different stretch distance, on tensile test equipment, carry out tension test;
Step 4, the accurate distance that stretches between the each point of back of measuring are calculated deflection through the variable in distance that stretches between the each point of front and back;
The part of step 5, intercepting homogeneous deformation is processed into the mechanical property sample.
2. the method with the simulation elbow tension side deflection that stretches as claimed in claim 1 is characterized in that in the described step 1, the length of bar-shaped sample or homogeneous tube sample is not less than 150mm.
3. the method with the simulation elbow tension side deflection that stretches as claimed in claim 1 is characterized in that, in the described step 1, accurately measures the length and width of bar-shaped sample, the length of thick or homogeneous tube sample.
4. the method with the simulation elbow tension side deflection that stretches as claimed in claim 1 is characterized in that, in the described step 4, and deflection=(each dot spacing-primary leading of back stretches)/primary leading * 100%.
CN2011104071604A 2011-12-09 2011-12-09 Method for simulating deformation of tension side of elbow by tension CN102494948A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011104071604A CN102494948A (en) 2011-12-09 2011-12-09 Method for simulating deformation of tension side of elbow by tension

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Application Number Priority Date Filing Date Title
CN2011104071604A CN102494948A (en) 2011-12-09 2011-12-09 Method for simulating deformation of tension side of elbow by tension

Publications (1)

Publication Number Publication Date
CN102494948A true CN102494948A (en) 2012-06-13

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1068419A (en) * 1991-07-08 1993-01-27 武汉水运工程学院 Computerized resilience and elongation instrument for bent tubes
JP2002194503A (en) * 2000-12-28 2002-07-10 Nkk Corp Steel tube with superior buckling resistance, and production method and evaluation system for the same
CN1793931A (en) * 2005-11-30 2006-06-28 天津市产品质量监督检测技术研究院 Prediction method for mechanical performance of hot milling seamless steel tube
JP2009236757A (en) * 2008-03-27 2009-10-15 Nippon Steel Corp High temperature tensile testing method of bar steel material, fire-proof performance predicting method of non-fire-proof coated steel material, and steel material superior in high temperature strength
CN101699259A (en) * 2009-10-30 2010-04-28 上海锅炉厂有限公司 Method for simulating bent pipe deformation by bending
CN101726445A (en) * 2008-10-23 2010-06-09 宝山钢铁股份有限公司 Method and test specimen for acquiring material parameters related to metal plate strain rate
CN101832893A (en) * 2009-03-09 2010-09-15 鞍钢股份有限公司 Measuring method of yield strength of pipeline steel tubes with high steel grade and large wall thickness
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1068419A (en) * 1991-07-08 1993-01-27 武汉水运工程学院 Computerized resilience and elongation instrument for bent tubes
JP2002194503A (en) * 2000-12-28 2002-07-10 Nkk Corp Steel tube with superior buckling resistance, and production method and evaluation system for the same
CN1793931A (en) * 2005-11-30 2006-06-28 天津市产品质量监督检测技术研究院 Prediction method for mechanical performance of hot milling seamless steel tube
JP2009236757A (en) * 2008-03-27 2009-10-15 Nippon Steel Corp High temperature tensile testing method of bar steel material, fire-proof performance predicting method of non-fire-proof coated steel material, and steel material superior in high temperature strength
CN101726445A (en) * 2008-10-23 2010-06-09 宝山钢铁股份有限公司 Method and test specimen for acquiring material parameters related to metal plate strain rate
CN101832893A (en) * 2009-03-09 2010-09-15 鞍钢股份有限公司 Measuring method of yield strength of pipeline steel tubes with high steel grade and large wall thickness
CN101923021A (en) * 2009-06-17 2010-12-22 中国石油天然气集团公司 Method for rapidly determining buckling strain capability of steel tube
CN101699259A (en) * 2009-10-30 2010-04-28 上海锅炉厂有限公司 Method for simulating bent pipe deformation by bending

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钢铁研究总院 等: "《中华人民共和国国家标准GB/T228.1-2010》", 23 December 2010 *

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Application publication date: 20120613