Heat-Treated, Cost-Effective, Wear-Resistant Round Bars
Shandong Huamin Steel Ball Joint-stock Co., Ltd.- Materials：304
- Certification：ISO, GS
- Applications：Oil
- Shape：Round
- Specifications：20
- Standard：Standard
Base Info
- Model NO.：30-120
- Specification：1000kg
- Trademark：huamin
- Origin：China
- HS Code：7326110000
- Production Capacity：100000ton,Year
Description
The two ends of the steel bar are tapered: the two ends of the steel bar are tapered for many reasons, mainly because the contact probability and contact area between the two ends of the steel bar in the rod mill are larger than the middle part, resulting in the effective grinding time of the two ends. Longer than the middle part, once there is a very obvious difference in the ratio between the two ends and the middle, we call this steel bar "failure", because it has no effective grinding effect in the mill.
Regarding the rod mill steel rod for grinding steel slag, the following materials are mainly used in China: 45# steel, 40Cr material, 42CrMo material
Due to the promotion of heat-treated steel bars in recent years, most manufacturers have replaced 45-gauge steel round bars with heat-treated steel bars made of 40Cr.
In fact, the most cost-effective one is the steel rod made of 42CrMo.
Take the 120MM-140MM diameter heat-treated rod mill steel rod as an example: the wear resistance of the 42CrMo steel rod is about 1.3-1.5 times that of 40Cr, but the price is only about 1.1 times that of it. Material that looks cheap. The price of the two materials is generally around 400.
Let us popularize the standards for heat-treated steel bars:
skills requirement
Relevant standard: YB/T4550-2016
The raw materials of the steel bars are high-quality special steels from well-known steel mills, and the internal inclusions and cracks meet the national standards.
The steel bar should have sufficient hardness: HRC45-55, check the surface hardness. Hot rolling and quenching of steel bars
Special industrial straightening of steel bars, non-straightness ≤ 3/1000, broken bar rate ≤ 3%
Steel rod length tolerance +0mm, -20mm
The length of the steel bar should be hot sawed. If it is not hot sawed, use a grinding wheel or a cutting machine to cut both ends of the bar to a suitable length.
The steel rod shall have sufficient wear resistance and shall not have defects such as cracks, blemishes and distortions.
There are no burrs and cracks on the surface of the steel rod. It has high hardness, good mechanical properties and excellent quality of wear resistance and non-deformation.
Regarding the rod mill steel rod for grinding steel slag, the following materials are mainly used in China: 45# steel, 40Cr material, 42CrMo materialDue to the promotion of heat-treated steel bars in recent years, most manufacturers have replaced 45-gauge steel round bars with heat-treated steel bars made of 40Cr.
In fact, the most cost-effective one is the steel rod made of 42CrMo.
Take the 120MM-140MM diameter heat-treated rod mill steel rod as an example: the wear resistance of the 42CrMo steel rod is about 1.3-1.5 times that of 40Cr, but the price is only about 1.1 times that of it. Material that looks cheap. The price of the two materials is generally around 400.
Let us popularize the standards for heat-treated steel bars:
skills requirement
Relevant standard: YB/T4550-2016
The raw materials of the steel bars are high-quality special steels from well-known steel mills, and the internal inclusions and cracks meet the national standards.The steel bar should have sufficient hardness: HRC45-55, check the surface hardness. Hot rolling and quenching of steel bars
Special industrial straightening of steel bars, non-straightness ≤ 3/1000, broken bar rate ≤ 3%
Steel rod length tolerance +0mm, -20mmThe length of the steel bar should be hot sawed. If it is not hot sawed, use a grinding wheel or a cutting machine to cut both ends of the bar to a suitable length.
The steel rod shall have sufficient wear resistance and shall not have defects such as cracks, blemishes and distortions.
There are no burrs and cracks on the surface of the steel rod. It has high hardness, good mechanical properties and excellent quality of wear resistance and non-deformation.