Other

Jing-jin Electric Technologies Co., Ltd.

Xia, Min

Min Xia

He, Manchao

Manchao He

Hongyan Guo

Hongchao Li

Jiuping Wang

A processing method of NPR steel rebar coil is disclosed. The NPR steel rebar is cold processed and has a diameter of less than 14 mm, and has a yield strength of 800&#x2dc;950 MPa, a tensile strength of 900&#x2dc;1100 MPa, and a elongation of not less than 20%. The processing method comprises: an I-shaped placing step L, an uncoiling step L, a flattening step L, a pointing step L, a butt welding step L, a hydraulic head-pushing step L, a cold drawn smoothing step L, a grit blasting step L, an in-situ inline annealing step L, an air-cooled tempering step L, a coiling step L, a placing step L, a flattening step L, a cold drawn spiral ribbing step L, a straightening step L, and a coiling step L. The method can achieve full intelligence, meet the processing requirements and the automatic intelligent production requirements of NPR steel rebar coil.

Processing method of NPR steel rebar coil

A processing method of NPR steel rebar rod is disclosed. The NPR steel rebar is cold processed and has a yield strength of 800&#x2dc;950 MPa, a tensile strength of 900&#x2dc;1100 MPa, and a percentage elongation at maximum force of not less than 10&#x2dc;40%. The processing method comprises the following steps: a I-shaped placing step L, an uncoiling step L, a flattening step L, a butt welding step L, a sandblasting step L, a straightening step L, a pointing step L, a hydraulic head-pushing step L, a cold drawn spiral ribbing step L, a straight forward continuous wire drawing and traction step L, a pre-straightening step L, a fine straightening step L, and a cutting-off step L. The processing method can meet the automatic intelligent production requirements of NPR steel rebar, cold rolled spiral NPR steel rebar, and pre-stressed NPR steel rebar.

Processing method of NPR steel rebar rod

An NPR non-magnetic steel material for rock bolt and a production method thereof are disclosed. The NPR non-magnetic steel material for rock bolt has a composition, in weight percent, consisting of: C: 0.4-0.7%, MN: 15-20%, Cr: 1-18%, Si: 0.3-3%, Ca: 0.05-0.15%, Cu: &#x2264;0.03%, Ni: &#x2264;0.02%, S: &#x2264;0.001%, P: &#x2264;0.001%, and the rest being Fe and unavoidable impurity elements. The NPR non-magnetic steel material for rock bolt and the production method thereof effectively solve the problems of steel materials for rock bolt in the prior art such as strong magnetism, low tensile strength and low effective elongation. The NPR non-magnetic steel material for rock bolt has a fully-austenitized structure and is non-magnetic, its yield strength is adjustable in the range of 600-1000 MPa, and its elongation is adjustable in the range of 20-60%.

NPR non-magnetic steel material for rock bolt and production method thereof

An NPR steel material for rock bolt and a production method thereof are disclosed. The NPR steel material for rock bolt has a composition, in weight percent, consisting of: C: 0.4-0.7%, Mn: 15-20%, Si: &#x2264;0.1%, Cu: &#x2264;0.03%, Cr: &#x2264;0.01%, Ni: &#x2264;0.02%, S: &#x2264;0.001%, P: &#x2264;0.001%, and the rest being Fe and unavoidable impurity elements. The NPR steel material for rock bolt and the production method thereof effectively solve the problem that rock bolts in the prior art have low tensile strength and low effective elongation. The NPR steel material for rock bolt has a yield strength adjustable in the range of 500-1100 MPa, and an elongation adjustable in the range of 10-80%.

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Beijing, China

Min Xia